diff options
Diffstat (limited to 'arch')
46 files changed, 1713 insertions, 496 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 8b3a9c0e771..c71acd7f9a1 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -1362,11 +1362,9 @@ static void kvm_release_vm_pages(struct kvm *kvm) struct kvm_memslots *slots; struct kvm_memory_slot *memslot; int j; - unsigned long base_gfn; slots = kvm_memslots(kvm); kvm_for_each_memslot(memslot, slots) { - base_gfn = memslot->base_gfn; for (j = 0; j < memslot->npages; j++) { if (memslot->rmap[j]) put_page((struct page *)memslot->rmap[j]); diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild index a4fe15e33c6..324495a08c8 100644 --- a/arch/powerpc/include/asm/Kbuild +++ b/arch/powerpc/include/asm/Kbuild @@ -1,4 +1,3 @@ - generic-y += clkdev.h generic-y += rwsem.h diff --git a/arch/powerpc/include/asm/fsl_hcalls.h b/arch/powerpc/include/asm/fsl_hcalls.h index 922d9b5fe3d..3abb58394da 100644 --- a/arch/powerpc/include/asm/fsl_hcalls.h +++ b/arch/powerpc/include/asm/fsl_hcalls.h @@ -96,7 +96,7 @@ static inline unsigned int fh_send_nmi(unsigned int vcpu_mask) r11 = FH_HCALL_TOKEN(FH_SEND_NMI); r3 = vcpu_mask; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -151,7 +151,7 @@ static inline unsigned int fh_partition_get_dtprop(int handle, r9 = (uint32_t)propvalue_addr; r10 = *propvalue_len; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), "+r" (r8), "+r" (r9), "+r" (r10) @@ -205,7 +205,7 @@ static inline unsigned int fh_partition_set_dtprop(int handle, r9 = (uint32_t)propvalue_addr; r10 = propvalue_len; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), "+r" (r8), "+r" (r9), "+r" (r10) @@ -229,7 +229,7 @@ static inline unsigned int fh_partition_restart(unsigned int partition) r11 = FH_HCALL_TOKEN(FH_PARTITION_RESTART); r3 = partition; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -262,7 +262,7 @@ static inline unsigned int fh_partition_get_status(unsigned int partition, r11 = FH_HCALL_TOKEN(FH_PARTITION_GET_STATUS); r3 = partition; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "=r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -295,7 +295,7 @@ static inline unsigned int fh_partition_start(unsigned int partition, r4 = entry_point; r5 = load; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5) : : EV_HCALL_CLOBBERS3 ); @@ -317,7 +317,7 @@ static inline unsigned int fh_partition_stop(unsigned int partition) r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP); r3 = partition; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -376,7 +376,7 @@ static inline unsigned int fh_partition_memcpy(unsigned int source, #endif r7 = count; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7) : : EV_HCALL_CLOBBERS5 @@ -399,7 +399,7 @@ static inline unsigned int fh_dma_enable(unsigned int liodn) r11 = FH_HCALL_TOKEN(FH_DMA_ENABLE); r3 = liodn; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -421,7 +421,7 @@ static inline unsigned int fh_dma_disable(unsigned int liodn) r11 = FH_HCALL_TOKEN(FH_DMA_DISABLE); r3 = liodn; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -447,7 +447,7 @@ static inline unsigned int fh_vmpic_get_msir(unsigned int interrupt, r11 = FH_HCALL_TOKEN(FH_VMPIC_GET_MSIR); r3 = interrupt; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "=r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -469,7 +469,7 @@ static inline unsigned int fh_system_reset(void) r11 = FH_HCALL_TOKEN(FH_SYSTEM_RESET); - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "=r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -506,7 +506,7 @@ static inline unsigned int fh_err_get_info(int queue, uint32_t *bufsize, r6 = addr_lo; r7 = peek; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7) : : EV_HCALL_CLOBBERS5 @@ -542,7 +542,7 @@ static inline unsigned int fh_get_core_state(unsigned int handle, r3 = handle; r4 = vcpu; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -572,7 +572,7 @@ static inline unsigned int fh_enter_nap(unsigned int handle, unsigned int vcpu) r3 = handle; r4 = vcpu; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -597,7 +597,7 @@ static inline unsigned int fh_exit_nap(unsigned int handle, unsigned int vcpu) r3 = handle; r4 = vcpu; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -618,7 +618,7 @@ static inline unsigned int fh_claim_device(unsigned int handle) r11 = FH_HCALL_TOKEN(FH_CLAIM_DEVICE); r3 = handle; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -645,7 +645,7 @@ static inline unsigned int fh_partition_stop_dma(unsigned int handle) r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP_DMA); r3 = handle; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index 7aefdb3e1ce..36fcf419046 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -160,7 +160,7 @@ extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, extern long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, long pte_index, unsigned long pteh, unsigned long ptel); extern long kvmppc_hv_get_dirty_log(struct kvm *kvm, - struct kvm_memory_slot *memslot); + struct kvm_memory_slot *memslot, unsigned long *map); extern void kvmppc_entry_trampoline(void); extern void kvmppc_hv_entry_trampoline(void); diff --git a/arch/powerpc/include/asm/kvm_booke_hv_asm.h b/arch/powerpc/include/asm/kvm_booke_hv_asm.h index 30a600fa1b6..a37a12a9a7d 100644 --- a/arch/powerpc/include/asm/kvm_booke_hv_asm.h +++ b/arch/powerpc/include/asm/kvm_booke_hv_asm.h @@ -38,9 +38,9 @@ #ifdef CONFIG_KVM_BOOKE_HV BEGIN_FTR_SECTION mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */ - bf 3, kvmppc_resume_\intno\()_\srr1 + bf 3, 1975f b kvmppc_handler_\intno\()_\srr1 -kvmppc_resume_\intno\()_\srr1: +1975: END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV) #endif .endm diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 28e8f5e5c63..68f5a308737 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -46,7 +46,7 @@ #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 #endif -#ifdef CONFIG_KVM_BOOK3S_64_HV +#if !defined(CONFIG_KVM_440) #include <linux/mmu_notifier.h> #define KVM_ARCH_WANT_MMU_NOTIFIER @@ -204,7 +204,7 @@ struct revmap_entry { }; /* - * We use the top bit of each memslot->rmap entry as a lock bit, + * We use the top bit of each memslot->arch.rmap entry as a lock bit, * and bit 32 as a present flag. The bottom 32 bits are the * index in the guest HPT of a HPTE that points to the page. */ @@ -215,14 +215,17 @@ struct revmap_entry { #define KVMPPC_RMAP_PRESENT 0x100000000ul #define KVMPPC_RMAP_INDEX 0xfffffffful -/* Low-order bits in kvm->arch.slot_phys[][] */ +/* Low-order bits in memslot->arch.slot_phys[] */ #define KVMPPC_PAGE_ORDER_MASK 0x1f #define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */ #define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */ #define KVMPPC_GOT_PAGE 0x80 struct kvm_arch_memory_slot { +#ifdef CONFIG_KVM_BOOK3S_64_HV unsigned long *rmap; + unsigned long *slot_phys; +#endif /* CONFIG_KVM_BOOK3S_64_HV */ }; struct kvm_arch { @@ -246,8 +249,6 @@ struct kvm_arch { unsigned long hpt_npte; unsigned long hpt_mask; spinlock_t slot_phys_lock; - unsigned long *slot_phys[KVM_MEM_SLOTS_NUM]; - int slot_npages[KVM_MEM_SLOTS_NUM]; unsigned short last_vcpu[NR_CPUS]; struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; struct kvmppc_linear_info *hpt_li; @@ -346,6 +347,27 @@ struct kvmppc_slb { bool class : 1; }; +# ifdef CONFIG_PPC_FSL_BOOK3E +#define KVMPPC_BOOKE_IAC_NUM 2 +#define KVMPPC_BOOKE_DAC_NUM 2 +# else +#define KVMPPC_BOOKE_IAC_NUM 4 +#define KVMPPC_BOOKE_DAC_NUM 2 +# endif +#define KVMPPC_BOOKE_MAX_IAC 4 +#define KVMPPC_BOOKE_MAX_DAC 2 + +struct kvmppc_booke_debug_reg { + u32 dbcr0; + u32 dbcr1; + u32 dbcr2; +#ifdef CONFIG_KVM_E500MC + u32 dbcr4; +#endif + u64 iac[KVMPPC_BOOKE_MAX_IAC]; + u64 dac[KVMPPC_BOOKE_MAX_DAC]; +}; + struct kvm_vcpu_arch { ulong host_stack; u32 host_pid; @@ -440,8 +462,6 @@ struct kvm_vcpu_arch { u32 ccr0; u32 ccr1; - u32 dbcr0; - u32 dbcr1; u32 dbsr; u64 mmcr[3]; @@ -471,9 +491,12 @@ struct kvm_vcpu_arch { ulong fault_esr; ulong queued_dear; ulong queued_esr; + spinlock_t wdt_lock; + struct timer_list wdt_timer; u32 tlbcfg[4]; u32 mmucfg; u32 epr; + struct kvmppc_booke_debug_reg dbg_reg; #endif gpa_t paddr_accessed; gva_t vaddr_accessed; @@ -486,6 +509,7 @@ struct kvm_vcpu_arch { u8 osi_needed; u8 osi_enabled; u8 papr_enabled; + u8 watchdog_enabled; u8 sane; u8 cpu_type; u8 hcall_needed; diff --git a/arch/powerpc/include/asm/kvm_para.h b/arch/powerpc/include/asm/kvm_para.h index 9365860fb7f..2b119654b4c 100644 --- a/arch/powerpc/include/asm/kvm_para.h +++ b/arch/powerpc/include/asm/kvm_para.h @@ -21,7 +21,6 @@ #include <uapi/asm/kvm_para.h> - #ifdef CONFIG_KVM_GUEST #include <linux/of.h> @@ -55,7 +54,7 @@ static unsigned long kvm_hypercall(unsigned long *in, unsigned long *out, unsigned long nr) { - return HC_EV_UNIMPLEMENTED; + return EV_UNIMPLEMENTED; } #endif @@ -66,7 +65,7 @@ static inline long kvm_hypercall0_1(unsigned int nr, unsigned long *r2) unsigned long out[8]; unsigned long r; - r = kvm_hypercall(in, out, nr | HC_VENDOR_KVM); + r = kvm_hypercall(in, out, KVM_HCALL_TOKEN(nr)); *r2 = out[0]; return r; @@ -77,7 +76,7 @@ static inline long kvm_hypercall0(unsigned int nr) unsigned long in[8]; unsigned long out[8]; - return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); + return kvm_hypercall(in, out, KVM_HCALL_TOKEN(nr)); } static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) @@ -86,7 +85,7 @@ static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) unsigned long out[8]; in[0] = p1; - return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); + return kvm_hypercall(in, out, KVM_HCALL_TOKEN(nr)); } static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, @@ -97,7 +96,7 @@ static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, in[0] = p1; in[1] = p2; - return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); + return kvm_hypercall(in, out, KVM_HCALL_TOKEN(nr)); } static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, @@ -109,7 +108,7 @@ static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, in[0] = p1; in[1] = p2; in[2] = p3; - return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); + return kvm_hypercall(in, out, KVM_HCALL_TOKEN(nr)); } static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, @@ -123,7 +122,7 @@ static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, in[1] = p2; in[2] = p3; in[3] = p4; - return kvm_hypercall(in, out, nr | HC_VENDOR_KVM); + return kvm_hypercall(in, out, KVM_HCALL_TOKEN(nr)); } diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index e006f0bdea9..609cca3e942 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -28,6 +28,7 @@ #include <linux/types.h> #include <linux/kvm_types.h> #include <linux/kvm_host.h> +#include <linux/bug.h> #ifdef CONFIG_PPC_BOOK3S #include <asm/kvm_book3s.h> #else @@ -68,6 +69,8 @@ extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu); extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb); extern void kvmppc_decrementer_func(unsigned long data); extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu); +extern int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu); +extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu); /* Core-specific hooks */ @@ -104,6 +107,7 @@ extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); +extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu); extern int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int op, int *advance); @@ -111,6 +115,7 @@ extern int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong val); extern int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *val); +extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu); extern int kvmppc_booke_init(void); extern void kvmppc_booke_exit(void); @@ -139,16 +144,26 @@ extern struct kvmppc_linear_info *kvm_alloc_hpt(void); extern void kvm_release_hpt(struct kvmppc_linear_info *li); extern int kvmppc_core_init_vm(struct kvm *kvm); extern void kvmppc_core_destroy_vm(struct kvm *kvm); +extern void kvmppc_core_free_memslot(struct kvm_memory_slot *free, + struct kvm_memory_slot *dont); +extern int kvmppc_core_create_memslot(struct kvm_memory_slot *slot, + unsigned long npages); extern int kvmppc_core_prepare_memory_region(struct kvm *kvm, + struct kvm_memory_slot *memslot, struct kvm_userspace_memory_region *mem); extern void kvmppc_core_commit_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem); + struct kvm_userspace_memory_region *mem, + struct kvm_memory_slot old); extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info); +extern void kvmppc_core_flush_memslot(struct kvm *kvm, + struct kvm_memory_slot *memslot); extern int kvmppc_bookehv_init(void); extern void kvmppc_bookehv_exit(void); +extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu); + /* * Cuts out inst bits with ordering according to spec. * That means the leftmost bit is zero. All given bits are included. @@ -182,6 +197,41 @@ static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value) return r; } +union kvmppc_one_reg { + u32 wval; + u64 dval; + vector128 vval; + u64 vsxval[2]; + struct { + u64 addr; + u64 length; + } vpaval; +}; + +#define one_reg_size(id) \ + (1ul << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT)) + +#define get_reg_val(id, reg) ({ \ + union kvmppc_one_reg __u; \ + switch (one_reg_size(id)) { \ + case 4: __u.wval = (reg); break; \ + case 8: __u.dval = (reg); break; \ + default: BUG(); \ + } \ + __u; \ +}) + + +#define set_reg_val(id, val) ({ \ + u64 __v; \ + switch (one_reg_size(id)) { \ + case 4: __v = (val).wval; break; \ + case 8: __v = (val).dval; break; \ + default: BUG(); \ + } \ + __v; \ +}) + void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); @@ -190,6 +240,8 @@ int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg); int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg); +int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *); +int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *); void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid); @@ -230,5 +282,15 @@ static inline void kvmppc_mmu_flush_icache(pfn_t pfn) } } +/* Please call after prepare_to_enter. This function puts the lazy ee state + back to normal mode, without actually enabling interrupts. */ +static inline void kvmppc_lazy_ee_enable(void) +{ +#ifdef CONFIG_PPC64 + /* Only need to enable IRQs by hard enabling them after this */ + local_paca->irq_happened = 0; + local_paca->soft_enabled = 1; +#endif +} #endif /* __POWERPC_KVM_PPC_H__ */ diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h index 2d916c4982c..e07e6af5e1f 100644 --- a/arch/powerpc/include/asm/reg_booke.h +++ b/arch/powerpc/include/asm/reg_booke.h @@ -539,6 +539,13 @@ #define TCR_FIE 0x00800000 /* FIT Interrupt Enable */ #define TCR_ARE 0x00400000 /* Auto Reload Enable */ +#ifdef CONFIG_E500 +#define TCR_GET_WP(tcr) ((((tcr) & 0xC0000000) >> 30) | \ + (((tcr) & 0x1E0000) >> 15)) +#else +#define TCR_GET_WP(tcr) (((tcr) & 0xC0000000) >> 30) +#endif + /* Bit definitions for the TSR. */ #define TSR_ENW 0x80000000 /* Enable Next Watchdog */ #define TSR_WIS 0x40000000 /* WDT Interrupt Status */ diff --git a/arch/powerpc/include/uapi/asm/Kbuild b/arch/powerpc/include/uapi/asm/Kbuild index a33c3c03bb2..9eedfc5a557 100644 --- a/arch/powerpc/include/uapi/asm/Kbuild +++ b/arch/powerpc/include/uapi/asm/Kbuild @@ -42,3 +42,4 @@ header-y += termios.h header-y += types.h header-y += ucontext.h header-y += unistd.h +header-y += epapr_hcalls.h diff --git a/arch/powerpc/include/asm/epapr_hcalls.h b/arch/powerpc/include/uapi/asm/epapr_hcalls.h index bf2c06c3387..b8d94459a92 100644 --- a/arch/powerpc/include/asm/epapr_hcalls.h +++ b/arch/powerpc/include/uapi/asm/epapr_hcalls.h @@ -50,10 +50,6 @@ #ifndef _EPAPR_HCALLS_H #define _EPAPR_HCALLS_H -#include <linux/types.h> -#include <linux/errno.h> -#include <asm/byteorder.h> - #define EV_BYTE_CHANNEL_SEND 1 #define EV_BYTE_CHANNEL_RECEIVE 2 #define EV_BYTE_CHANNEL_POLL 3 @@ -88,7 +84,8 @@ #define _EV_HCALL_TOKEN(id, num) (((id) << 16) | (num)) #define EV_HCALL_TOKEN(hcall_num) _EV_HCALL_TOKEN(EV_EPAPR_VENDOR_ID, hcall_num) -/* epapr error codes */ +/* epapr return codes */ +#define EV_SUCCESS 0 #define EV_EPERM 1 /* Operation not permitted */ #define EV_ENOENT 2 /* Entry Not Found */ #define EV_EIO 3 /* I/O error occured */ @@ -108,6 +105,11 @@ #define EV_UNIMPLEMENTED 12 /* Unimplemented hypercall */ #define EV_BUFFER_OVERFLOW 13 /* Caller-supplied buffer too small */ +#ifndef __ASSEMBLY__ +#include <linux/types.h> +#include <linux/errno.h> +#include <asm/byteorder.h> + /* * Hypercall register clobber list * @@ -193,7 +195,7 @@ static inline unsigned int ev_int_set_config(unsigned int interrupt, r5 = priority; r6 = destination; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6) : : EV_HCALL_CLOBBERS4 ); @@ -222,7 +224,7 @@ static inline unsigned int ev_int_get_config(unsigned int interrupt, r11 = EV_HCALL_TOKEN(EV_INT_GET_CONFIG); r3 = interrupt; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5), "=r" (r6) : : EV_HCALL_CLOBBERS4 ); @@ -252,7 +254,7 @@ static inline unsigned int ev_int_set_mask(unsigned int interrupt, r3 = interrupt; r4 = mask; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -277,7 +279,7 @@ static inline unsigned int ev_int_get_mask(unsigned int interrupt, r11 = EV_HCALL_TOKEN(EV_INT_GET_MASK); r3 = interrupt; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "=r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -305,7 +307,7 @@ static inline unsigned int ev_int_eoi(unsigned int interrupt) r11 = EV_HCALL_TOKEN(EV_INT_EOI); r3 = interrupt; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -344,7 +346,7 @@ static inline unsigned int ev_byte_channel_send(unsigned int handle, r7 = be32_to_cpu(p[2]); r8 = be32_to_cpu(p[3]); - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), "+r" (r8) : : EV_HCALL_CLOBBERS6 @@ -383,7 +385,7 @@ static inline unsigned int ev_byte_channel_receive(unsigned int handle, r3 = handle; r4 = *count; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "+r" (r4), "=r" (r5), "=r" (r6), "=r" (r7), "=r" (r8) : : EV_HCALL_CLOBBERS6 @@ -421,7 +423,7 @@ static inline unsigned int ev_byte_channel_poll(unsigned int handle, r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_POLL); r3 = handle; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5) : : EV_HCALL_CLOBBERS3 ); @@ -454,7 +456,7 @@ static inline unsigned int ev_int_iack(unsigned int handle, r11 = EV_HCALL_TOKEN(EV_INT_IACK); r3 = handle; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3), "=r" (r4) : : EV_HCALL_CLOBBERS2 ); @@ -478,7 +480,7 @@ static inline unsigned int ev_doorbell_send(unsigned int handle) r11 = EV_HCALL_TOKEN(EV_DOORBELL_SEND); r3 = handle; - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "+r" (r3) : : EV_HCALL_CLOBBERS1 ); @@ -498,12 +500,12 @@ static inline unsigned int ev_idle(void) r11 = EV_HCALL_TOKEN(EV_IDLE); - __asm__ __volatile__ ("sc 1" + asm volatile("bl epapr_hypercall_start" : "+r" (r11), "=r" (r3) : : EV_HCALL_CLOBBERS1 ); return r3; } - +#endif /* !__ASSEMBLY__ */ #endif diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 1bea4d8ea6f..b89ae4db45c 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -221,6 +221,12 @@ struct kvm_sregs { __u32 dbsr; /* KVM_SREGS_E_UPDATE_DBSR */ __u32 dbcr[3]; + /* + * iac/dac registers are 64bit wide, while this API + * interface provides only lower 32 bits on 64 bit + * processors. ONE_REG interface is added for 64bit + * iac/dac registers. + */ __u32 iac[4]; __u32 dac[2]; __u32 dvc[2]; @@ -326,5 +332,58 @@ struct kvm_book3e_206_tlb_params { }; #define KVM_REG_PPC_HIOR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x1) +#define KVM_REG_PPC_IAC1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x2) +#define KVM_REG_PPC_IAC2 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x3) +#define KVM_REG_PPC_IAC3 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x4) +#define KVM_REG_PPC_IAC4 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x5) +#define KVM_REG_PPC_DAC1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x6) +#define KVM_REG_PPC_DAC2 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x7) +#define KVM_REG_PPC_DABR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8) +#define KVM_REG_PPC_DSCR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x9) +#define KVM_REG_PPC_PURR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xa) +#define KVM_REG_PPC_SPURR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xb) +#define KVM_REG_PPC_DAR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc) +#define KVM_REG_PPC_DSISR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xd) +#define KVM_REG_PPC_AMR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xe) +#define KVM_REG_PPC_UAMOR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xf) + +#define KVM_REG_PPC_MMCR0 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x10) +#define KVM_REG_PPC_MMCR1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x11) +#define KVM_REG_PPC_MMCRA (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x12) + +#define KVM_REG_PPC_PMC1 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x18) +#define KVM_REG_PPC_PMC2 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x19) +#define KVM_REG_PPC_PMC3 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1a) +#define KVM_REG_PPC_PMC4 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1b) +#define KVM_REG_PPC_PMC5 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1c) +#define KVM_REG_PPC_PMC6 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1d) +#define KVM_REG_PPC_PMC7 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1e) +#define KVM_REG_PPC_PMC8 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x1f) + +/* 32 floating-point registers */ +#define KVM_REG_PPC_FPR0 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x20) +#define KVM_REG_PPC_FPR(n) (KVM_REG_PPC_FPR0 + (n)) +#define KVM_REG_PPC_FPR31 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x3f) + +/* 32 VMX/Altivec vector registers */ +#define KVM_REG_PPC_VR0 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x40) +#define KVM_REG_PPC_VR(n) (KVM_REG_PPC_VR0 + (n)) +#define KVM_REG_PPC_VR31 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x5f) + +/* 32 double-width FP registers for VSX */ +/* High-order halves overlap with FP regs */ +#define KVM_REG_PPC_VSR0 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x60) +#define KVM_REG_PPC_VSR(n) (KVM_REG_PPC_VSR0 + (n)) +#define KVM_REG_PPC_VSR31 (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x7f) + +/* FP and vector status/control registers */ +#define KVM_REG_PPC_FPSCR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x80) +#define KVM_REG_PPC_VSCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x81) + +/* Virtual processor areas */ +/* For SLB & DTL, address in high (first) half, length in low half */ +#define KVM_REG_PPC_VPA_ADDR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x82) +#define KVM_REG_PPC_VPA_SLB (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x83) +#define KVM_REG_PPC_VPA_DTL (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x84) #endif /* __LINUX_KVM_POWERPC_H */ diff --git a/arch/powerpc/include/uapi/asm/kvm_para.h b/arch/powerpc/include/uapi/asm/kvm_para.h index 5e04383a1db..ed0e0254b47 100644 --- a/arch/powerpc/include/uapi/asm/kvm_para.h +++ b/arch/powerpc/include/uapi/asm/kvm_para.h @@ -75,9 +75,10 @@ struct kvm_vcpu_arch_shared { }; #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ -#define HC_VENDOR_KVM (42 << 16) -#define HC_EV_SUCCESS 0 -#define HC_EV_UNIMPLEMENTED 12 + +#define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num) + +#include <uapi/asm/epapr_hcalls.h> #define KVM_FEATURE_MAGIC_PAGE 1 diff --git a/arch/powerpc/kernel/epapr_hcalls.S b/arch/powerpc/kernel/epapr_hcalls.S index 697b390ebfd..62c0dc23782 100644 --- a/arch/powerpc/kernel/epapr_hcalls.S +++ b/arch/powerpc/kernel/epapr_hcalls.S @@ -8,13 +8,41 @@ */ #include <linux/threads.h> +#include <asm/epapr_hcalls.h> #include <asm/reg.h> #include <asm/page.h> #include <asm/cputable.h> #include <asm/thread_info.h> #include <asm/ppc_asm.h> +#include <asm/asm-compat.h> #include <asm/asm-offsets.h> +/* epapr_ev_idle() was derived from e500_idle() */ +_GLOBAL(epapr_ev_idle) + CURRENT_THREAD_INFO(r3, r1) + PPC_LL r4, TI_LOCAL_FLAGS(r3) /* set napping bit */ + ori r4, r4,_TLF_NAPPING /* so when we take an exception */ + PPC_STL r4, TI_LOCAL_FLAGS(r3) /* it will return to our caller */ + + wrteei 1 + +idle_loop: + LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE)) + +.global epapr_ev_idle_start +epapr_ev_idle_start: + li r3, -1 + nop + nop + nop + + /* + * Guard against spurious wakeups from a hypervisor -- + * only interrupt will cause us to return to LR due to + * _TLF_NAPPING. + */ + b idle_loop + /* Hypercall entry point. Will be patched with device tree instructions. */ .global epapr_hypercall_start epapr_hypercall_start: diff --git a/arch/powerpc/kernel/epapr_paravirt.c b/arch/powerpc/kernel/epapr_paravirt.c index 028aeae370b..f3eab8594d9 100644 --- a/arch/powerpc/kernel/epapr_paravirt.c +++ b/arch/powerpc/kernel/epapr_paravirt.c @@ -21,6 +21,10 @@ #include <asm/epapr_hcalls.h> #include <asm/cacheflush.h> #include <asm/code-patching.h> +#include <asm/machdep.h> + +extern void epapr_ev_idle(void); +extern u32 epapr_ev_idle_start[]; bool epapr_paravirt_enabled; @@ -41,8 +45,13 @@ static int __init epapr_paravirt_init(void) if (len % 4 || len > (4 * 4)) return -ENODEV; - for (i = 0; i < (len / 4); i++) + for (i = 0; i < (len / 4); i++) { patch_instruction(epapr_hypercall_start + i, insts[i]); + patch_instruction(epapr_ev_idle_start + i, insts[i]); + } + + if (of_get_property(hyper_node, "has-idle", NULL)) + ppc_md.power_save = epapr_ev_idle; epapr_paravirt_enabled = true; diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c index 867db1de894..a61b133c4f9 100644 --- a/arch/powerpc/kernel/kvm.c +++ b/arch/powerpc/kernel/kvm.c @@ -419,7 +419,7 @@ static void kvm_map_magic_page(void *data) in[0] = KVM_MAGIC_PAGE; in[1] = KVM_MAGIC_PAGE; - kvm_hypercall(in, out, HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE); + kvm_hypercall(in, out, KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE)); *features = out[0]; } diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c index 19e4288d848..78b8766fd79 100644 --- a/arch/powerpc/kernel/ppc_ksyms.c +++ b/arch/powerpc/kernel/ppc_ksyms.c @@ -43,6 +43,7 @@ #include <asm/dcr.h> #include <asm/ftrace.h> #include <asm/switch_to.h> +#include <asm/epapr_hcalls.h> #ifdef CONFIG_PPC32 extern void transfer_to_handler(void); @@ -191,3 +192,7 @@ EXPORT_SYMBOL(__arch_hweight64); #ifdef CONFIG_PPC_BOOK3S_64 EXPORT_SYMBOL_GPL(mmu_psize_defs); #endif + +#ifdef CONFIG_EPAPR_PARAVIRT +EXPORT_SYMBOL(epapr_hypercall_start); +#endif diff --git a/arch/powerpc/kvm/44x.c b/arch/powerpc/kvm/44x.c index 50e7dbc7356..3d7fd21c65f 100644 --- a/arch/powerpc/kvm/44x.c +++ b/arch/powerpc/kvm/44x.c @@ -83,6 +83,7 @@ int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) vcpu_44x->shadow_refs[i].gtlb_index = -1; vcpu->arch.cpu_type = KVM_CPU_440; + vcpu->arch.pvr = mfspr(SPRN_PVR); return 0; } diff --git a/arch/powerpc/kvm/44x_emulate.c b/arch/powerpc/kvm/44x_emulate.c index c8c61578fdf..1a793c4c4a6 100644 --- a/arch/powerpc/kvm/44x_emulate.c +++ b/arch/powerpc/kvm/44x_emulate.c @@ -27,12 +27,68 @@ #include "booke.h" #include "44x_tlb.h" +#define XOP_MFDCRX 259 #define XOP_MFDCR 323 +#define XOP_MTDCRX 387 #define XOP_MTDCR 451 #define XOP_TLBSX 914 #define XOP_ICCCI 966 #define XOP_TLBWE 978 +static int emulate_mtdcr(struct kvm_vcpu *vcpu, int rs, int dcrn) +{ + /* emulate some access in kernel */ + switch (dcrn) { + case DCRN_CPR0_CONFIG_ADDR: + vcpu->arch.cpr0_cfgaddr = kvmppc_get_gpr(vcpu, rs); + return EMULATE_DONE; + default: + vcpu->run->dcr.dcrn = dcrn; + vcpu->run->dcr.data = kvmppc_get_gpr(vcpu, rs); + vcpu->run->dcr.is_write = 1; + vcpu->arch.dcr_needed = 1; + kvmppc_account_exit(vcpu, DCR_EXITS); + return EMULATE_DO_DCR; + } +} + +static int emulate_mfdcr(struct kvm_vcpu *vcpu, int rt, int dcrn) +{ + /* The guest may access CPR0 registers to determine the timebase + * frequency, and it must know the real host frequency because it + * can directly access the timebase registers. + * + * It would be possible to emulate those accesses in userspace, + * but userspace can really only figure out the end frequency. + * We could decompose that into the factors that compute it, but + * that's tricky math, and it's easier to just report the real + * CPR0 values. + */ + switch (dcrn) { + case DCRN_CPR0_CONFIG_ADDR: + kvmppc_set_gpr(vcpu, rt, vcpu->arch.cpr0_cfgaddr); + break; + case DCRN_CPR0_CONFIG_DATA: + local_irq_disable(); + mtdcr(DCRN_CPR0_CONFIG_ADDR, + vcpu->arch.cpr0_cfgaddr); + kvmppc_set_gpr(vcpu, rt, + mfdcr(DCRN_CPR0_CONFIG_DATA)); + local_irq_enable(); + break; + default: + vcpu->run->dcr.dcrn = dcrn; + vcpu->run->dcr.data = 0; + vcpu->run->dcr.is_write = 0; + vcpu->arch.io_gpr = rt; + vcpu->arch.dcr_needed = 1; + kvmppc_account_exit(vcpu, DCR_EXITS); + return EMULATE_DO_DCR; + } + + return EMULATE_DONE; +} + int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int inst, int *advance) { @@ -50,55 +106,21 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, switch (get_xop(inst)) { case XOP_MFDCR: - /* The guest may access CPR0 registers to determine the timebase - * frequency, and it must know the real host frequency because it - * can directly access the timebase registers. - * - * It would be possible to emulate those accesses in userspace, - * but userspace can really only figure out the end frequency. - * We could decompose that into the factors that compute it, but - * that's tricky math, and it's easier to just report the real - * CPR0 values. - */ - switch (dcrn) { - case DCRN_CPR0_CONFIG_ADDR: - kvmppc_set_gpr(vcpu, rt, vcpu->arch.cpr0_cfgaddr); - break; - case DCRN_CPR0_CONFIG_DATA: - local_irq_disable(); - mtdcr(DCRN_CPR0_CONFIG_ADDR, - vcpu->arch.cpr0_cfgaddr); - kvmppc_set_gpr(vcpu, rt, - mfdcr(DCRN_CPR0_CONFIG_DATA)); - local_irq_enable(); - break; - default: - run->dcr.dcrn = dcrn; - run->dcr.data = 0; - run->dcr.is_write = 0; - vcpu->arch.io_gpr = rt; - vcpu->arch.dcr_needed = 1; - kvmppc_account_exit(vcpu, DCR_EXITS); - emulated = EMULATE_DO_DCR; - } + emulated = emulate_mfdcr(vcpu, rt, dcrn); + break; + case XOP_MFDCRX: + emulated = emulate_mfdcr(vcpu, rt, + kvmppc_get_gpr(vcpu, ra)); break; case XOP_MTDCR: - /* emulate some access in kernel */ - switch (dcrn) { - case DCRN_CPR0_CONFIG_ADDR: - vcpu->arch.cpr0_cfgaddr = kvmppc_get_gpr(vcpu, rs); - break; - default: - run->dcr.dcrn = dcrn; - run->dcr.data = kvmppc_get_gpr(vcpu, rs); - run->dcr.is_write = 1; - vcpu->arch.dcr_needed = 1; - kvmppc_account_exit(vcpu, DCR_EXITS); - emulated = EMULATE_DO_DCR; - } + emulated = emulate_mtdcr(vcpu, rs, dcrn); + break; + case XOP_MTDCRX: + emulated = emulate_mtdcr(vcpu, rs, + kvmppc_get_gpr(vcpu, ra)); break; case XOP_TLBWE: diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index f4dacb9c57f..71f0cd9edf3 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -36,6 +36,7 @@ config KVM_BOOK3S_64_HANDLER config KVM_BOOK3S_PR bool select KVM_MMIO + select MMU_NOTIFIER config KVM_BOOK3S_32 tristate "KVM support for PowerPC book3s_32 processors" @@ -123,6 +124,7 @@ config KVM_E500V2 depends on EXPERIMENTAL && E500 && !PPC_E500MC select KVM select KVM_MMIO + select MMU_NOTIFIER ---help--- Support running unmodified E500 guest kernels in virtual machines on E500v2 host processors. @@ -138,6 +140,7 @@ config KVM_E500MC select KVM select KVM_MMIO select KVM_BOOKE_HV + select MMU_NOTIFIER ---help--- Support running unmodified E500MC/E5500 (32-bit) guest kernels in virtual machines on E500MC/E5500 host processors. diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 3f2a8360c85..a4b64528524 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -411,6 +411,15 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) return 0; } +int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) +{ + return 0; +} + +void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) +{ +} + int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) { int i; @@ -476,6 +485,122 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) return -ENOTSUPP; } +int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) +{ + int r; + union kvmppc_one_reg val; + int size; + long int i; + + size = one_reg_size(reg->id); + if (size > sizeof(val)) + return -EINVAL; + + r = kvmppc_get_one_reg(vcpu, reg->id, &val); + + if (r == -EINVAL) { + r = 0; + switch (reg->id) { + case KVM_REG_PPC_DAR: + val = get_reg_val(reg->id, vcpu->arch.shared->dar); + break; + case KVM_REG_PPC_DSISR: + val = get_reg_val(reg->id, vcpu->arch.shared->dsisr); + break; + case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: + i = reg->id - KVM_REG_PPC_FPR0; + val = get_reg_val(reg->id, vcpu->arch.fpr[i]); + break; + case KVM_REG_PPC_FPSCR: + val = get_reg_val(reg->id, vcpu->arch.fpscr); + break; +#ifdef CONFIG_ALTIVEC + case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: + if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { + r = -ENXIO; + break; + } + val.vval = vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0]; + break; + case KVM_REG_PPC_VSCR: + if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { + r = -ENXIO; + break; + } + val = get_reg_val(reg->id, vcpu->arch.vscr.u[3]); + break; +#endif /* CONFIG_ALTIVEC */ + default: + r = -EINVAL; + break; + } + } + if (r) + return r; + + if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size)) + r = -EFAULT; + + return r; +} + +int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) +{ + int r; + union kvmppc_one_reg val; + int size; + long int i; + + size = one_reg_size(reg->id); + if (size > sizeof(val)) + return -EINVAL; + + if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size)) + return -EFAULT; + + r = kvmppc_set_one_reg(vcpu, reg->id, &val); + + if (r == -EINVAL) { + r = 0; + switch (reg->id) { + case KVM_REG_PPC_DAR: + vcpu->arch.shared->dar = set_reg_val(reg->id, val); + break; + case KVM_REG_PPC_DSISR: + vcpu->arch.shared->dsisr = set_reg_val(reg->id, val); + break; + case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: + i = reg->id - KVM_REG_PPC_FPR0; + vcpu->arch.fpr[i] = set_reg_val(reg->id, val); + break; + case KVM_REG_PPC_FPSCR: + vcpu->arch.fpscr = set_reg_val(reg->id, val); + break; +#ifdef CONFIG_ALTIVEC + case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: + if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { + r = -ENXIO; + break; + } + vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0] = val.vval; + break; + case KVM_REG_PPC_VSCR: + if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { + r = -ENXIO; + break; + } + vcpu->arch.vscr.u[3] = set_reg_val(reg->id, val); + break; +#endif /* CONFIG_ALTIVEC */ + default: + r = -EINVAL; + break; + } + } + + return r; +} + int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, struct kvm_translation *tr) { diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c b/arch/powerpc/kvm/book3s_32_mmu_host.c index b0f625a3334..d1107a9b5d1 100644 --- a/arch/powerpc/kvm/book3s_32_mmu_host.c +++ b/arch/powerpc/kvm/book3s_32_mmu_host.c @@ -254,6 +254,7 @@ next_pteg: kvmppc_mmu_hpte_cache_map(vcpu, pte); + kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT); out: return r; } diff --git a/arch/powerpc/kvm/book3s_64_mmu_host.c b/arch/powerpc/kvm/book3s_64_mmu_host.c index 4d72f9ebc55..d0205a545a8 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_host.c +++ b/arch/powerpc/kvm/book3s_64_mmu_host.c @@ -171,6 +171,7 @@ map_again: kvmppc_mmu_hpte_cache_map(vcpu, pte); } + kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT); out: return r; diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index d95d11322a1..2a89a36e726 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -24,6 +24,7 @@ #include <linux/slab.h> #include <linux/hugetlb.h> #include <linux/vmalloc.h> +#include <linux/srcu.h> #include <asm/tlbflush.h> #include <asm/kvm_ppc.h> @@ -260,7 +261,7 @@ static void kvmppc_mmu_book3s_64_hv_reset_msr(struct kvm_vcpu *vcpu) /* * This is called to get a reference to a guest page if there isn't - * one already in the kvm->arch.slot_phys[][] arrays. + * one already in the memslot->arch.slot_phys[] array. */ static long kvmppc_get_guest_page(struct kvm *kvm, unsigned long gfn, struct kvm_memory_slot *memslot, @@ -275,7 +276,7 @@ static long kvmppc_get_guest_page(struct kvm *kvm, unsigned long gfn, struct vm_area_struct *vma; unsigned long pfn, i, npages; - physp = kvm->arch.slot_phys[memslot->id]; + physp = memslot->arch.slot_phys; if (!physp) return -EINVAL; if (physp[gfn - memslot->base_gfn]) @@ -570,7 +571,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, struct kvm *kvm = vcpu->kvm; unsigned long *hptep, hpte[3], r; unsigned long mmu_seq, psize, pte_size; - unsigned long gfn, hva, pfn; + unsigned long gpa, gfn, hva, pfn; struct kvm_memory_slot *memslot; unsigned long *rmap; struct revmap_entry *rev; @@ -608,15 +609,14 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, /* Translate the logical address and get the page */ psize = hpte_page_size(hpte[0], r); - gfn = hpte_rpn(r, psize); + gpa = (r & HPTE_R_RPN & ~(psize - 1)) | (ea & (psize - 1)); + gfn = gpa >> PAGE_SHIFT; memslot = gfn_to_memslot(kvm, gfn); /* No memslot means it's an emulated MMIO region */ - if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) { - unsigned long gpa = (gfn << PAGE_SHIFT) | (ea & (psize - 1)); + if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) return kvmppc_hv_emulate_mmio(run, vcpu, gpa, ea, dsisr & DSISR_ISSTORE); - } if (!kvm->arch.using_mmu_notifiers) return -EFAULT; /* should never get here */ @@ -710,7 +710,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, /* Check if we might have been invalidated; let the guest retry if so */ ret = RESUME_GUEST; - if (mmu_notifier_retry(vcpu, mmu_seq)) { + if (mmu_notifier_retry(vcpu->kvm, mmu_seq)) { unlock_rmap(rmap); goto out_unlock; } @@ -850,7 +850,8 @@ static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp, psize = hpte_page_size(hptep[0], ptel); if ((hptep[0] & HPTE_V_VALID) && hpte_rpn(ptel, psize) == gfn) { - hptep[0] |= HPTE_V_ABSENT; + if (kvm->arch.using_mmu_notifiers) + hptep[0] |= HPTE_V_ABSENT; kvmppc_invalidate_hpte(kvm, hptep, i); /* Harvest R and C */ rcbits = hptep[1] & (HPTE_R_R | HPTE_R_C); @@ -877,6 +878,28 @@ int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) return 0; } +void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) +{ + unsigned long *rmapp; + unsigned long gfn; + unsigned long n; + + rmapp = memslot->arch.rmap; + gfn = memslot->base_gfn; + for (n = memslot->npages; n; --n) { + /* + * Testing the present bit without locking is OK because + * the memslot has been marked invalid already, and hence + * no new HPTEs referencing this page can be created, + * thus the present bit can't go from 0 to 1. + */ + if (*rmapp & KVMPPC_RMAP_PRESENT) + kvm_unmap_rmapp(kvm, rmapp, gfn); + ++rmapp; + ++gfn; + } +} + static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp, unsigned long gfn) { @@ -1030,16 +1053,16 @@ static int kvm_test_clear_dirty(struct kvm *kvm, unsigned long *rmapp) return ret; } -long kvmppc_hv_get_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) +long kvmppc_hv_get_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot, + unsigned long *map) { unsigned long i; - unsigned long *rmapp, *map; + unsigned long *rmapp; preempt_disable(); rmapp = memslot->arch.rmap; - map = memslot->dirty_bitmap; for (i = 0; i < memslot->npages; ++i) { - if (kvm_test_clear_dirty(kvm, rmapp)) + if (kvm_test_clear_dirty(kvm, rmapp) && map) __set_bit_le(i, map); ++rmapp; } @@ -1057,20 +1080,22 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, unsigned long hva, psize, offset; unsigned long pa; unsigned long *physp; + int srcu_idx; + srcu_idx = srcu_read_lock(&kvm->srcu); memslot = gfn_to_memslot(kvm, gfn); if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) - return NULL; + goto err; if (!kvm->arch.using_mmu_notifiers) { - physp = kvm->arch.slot_phys[memslot->id]; + physp = memslot->arch.slot_phys; if (!physp) - return NULL; + goto err; physp += gfn - memslot->base_gfn; pa = *physp; if (!pa) { if (kvmppc_get_guest_page(kvm, gfn, memslot, PAGE_SIZE) < 0) - return NULL; + goto err; pa = *physp; } page = pfn_to_page(pa >> PAGE_SHIFT); @@ -1079,9 +1104,11 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, hva = gfn_to_hva_memslot(memslot, gfn); npages = get_user_pages_fast(hva, 1, 1, pages); if (npages < 1) - return NULL; + goto err; page = pages[0]; } + srcu_read_unlock(&kvm->srcu, srcu_idx); + psize = PAGE_SIZE; if (PageHuge(page)) { page = compound_head(page); @@ -1091,6 +1118,10 @@ void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, if (nb_ret) *nb_ret = psize - offset; return page_address(page) + offset; + + err: + srcu_read_unlock(&kvm->srcu, srcu_idx); + return NULL; } void kvmppc_unpin_guest_page(struct kvm *kvm, void *va) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 721d4603a23..cd8025db301 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -30,6 +30,7 @@ #include <linux/cpumask.h> #include <linux/spinlock.h> #include <linux/page-flags.h> +#include <linux/srcu.h> #include <asm/reg.h> #include <asm/cputable.h> @@ -142,6 +143,22 @@ static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) vpa->yield_count = 1; } +static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, + unsigned long addr, unsigned long len) +{ + /* check address is cacheline aligned */ + if (addr & (L1_CACHE_BYTES - 1)) + return -EINVAL; + spin_lock(&vcpu->arch.vpa_update_lock); + if (v->next_gpa != addr || v->len != len) { + v->next_gpa = addr; + v->len = addr ? len : 0; + v->update_pending = 1; + } + spin_unlock(&vcpu->arch.vpa_update_lock); + return 0; +} + /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ struct reg_vpa { u32 dummy; @@ -320,7 +337,8 @@ static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) spin_lock(&vcpu->arch.vpa_update_lock); if (vcpu->arch.vpa.update_pending) { kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); - init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); + if (vcpu->arch.vpa.pinned_addr) + init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); } if (vcpu->arch.dtl.update_pending) { kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); @@ -366,13 +384,16 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) unsigned long req = kvmppc_get_gpr(vcpu, 3); unsigned long target, ret = H_SUCCESS; struct kvm_vcpu *tvcpu; + int idx; switch (req) { case H_ENTER: + idx = srcu_read_lock(&vcpu->kvm->srcu); ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), kvmppc_get_gpr(vcpu, 5), kvmppc_get_gpr(vcpu, 6), kvmppc_get_gpr(vcpu, 7)); + srcu_read_unlock(&vcpu->kvm->srcu, idx); break; case H_CEDE: break; @@ -411,6 +432,7 @@ static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, struct task_struct *tsk) { int r = RESUME_HOST; + int srcu_idx; vcpu->stat.sum_exits++; @@ -470,12 +492,16 @@ static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, * have been handled already. */ case BOOK3S_INTERRUPT_H_DATA_STORAGE: + srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); r = kvmppc_book3s_hv_page_fault(run, vcpu, vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); + srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); break; case BOOK3S_INTERRUPT_H_INST_STORAGE: + srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); r = kvmppc_book3s_hv_page_fault(run, vcpu, kvmppc_get_pc(vcpu), 0); + srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); break; /* * This occurs if the guest executes an illegal instruction. @@ -535,36 +561,175 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, return 0; } -int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) +int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) { - int r = -EINVAL; + int r = 0; + long int i; - switch (reg->id) { + switch (id) { case KVM_REG_PPC_HIOR: - r = put_user(0, (u64 __user *)reg->addr); + *val = get_reg_val(id, 0); + break; + case KVM_REG_PPC_DABR: + *val = get_reg_val(id, vcpu->arch.dabr); + break; + case KVM_REG_PPC_DSCR: + *val = get_reg_val(id, vcpu->arch.dscr); + break; + case KVM_REG_PPC_PURR: + *val = get_reg_val(id, vcpu->arch.purr); + break; + case KVM_REG_PPC_SPURR: + *val = get_reg_val(id, vcpu->arch.spurr); + break; + case KVM_REG_PPC_AMR: + *val = get_reg_val(id, vcpu->arch.amr); + break; + case KVM_REG_PPC_UAMOR: + *val = get_reg_val(id, vcpu->arch.uamor); + break; + case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRA: + i = id - KVM_REG_PPC_MMCR0; + *val = get_reg_val(id, vcpu->arch.mmcr[i]); + break; + case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: + i = id - KVM_REG_PPC_PMC1; + *val = get_reg_val(id, vcpu->arch.pmc[i]); + break; +#ifdef CONFIG_VSX + case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: + if (cpu_has_feature(CPU_FTR_VSX)) { + /* VSX => FP reg i is stored in arch.vsr[2*i] */ + long int i = id - KVM_REG_PPC_FPR0; + *val = get_reg_val(id, vcpu->arch.vsr[2 * i]); + } else { + /* let generic code handle it */ + r = -EINVAL; + } + break; + case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: + if (cpu_has_feature(CPU_FTR_VSX)) { + long int i = id - KVM_REG_PPC_VSR0; + val->vsxval[0] = vcpu->arch.vsr[2 * i]; + val->vsxval[1] = vcpu->arch.vsr[2 * i + 1]; + } else { + r = -ENXIO; + } + break; +#endif /* CONFIG_VSX */ + case KVM_REG_PPC_VPA_ADDR: + spin_lock(&vcpu->arch.vpa_update_lock); + *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); + spin_unlock(&vcpu->arch.vpa_update_lock); + break; + case KVM_REG_PPC_VPA_SLB: + spin_lock(&vcpu->arch.vpa_update_lock); + val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; + val->vpaval.length = vcpu->arch.slb_shadow.len; + spin_unlock(&vcpu->arch.vpa_update_lock); + break; + case KVM_REG_PPC_VPA_DTL: + spin_lock(&vcpu->arch.vpa_update_lock); + val->vpaval.addr = vcpu->arch.dtl.next_gpa; + val->vpaval.length = vcpu->arch.dtl.len; + spin_unlock(&vcpu->arch.vpa_update_lock); break; default: + r = -EINVAL; break; } return r; } -int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) +int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) { - int r = -EINVAL; + int r = 0; + long int i; + unsigned long addr, len; - switch (reg->id) { + switch (id) { case KVM_REG_PPC_HIOR: - { - u64 hior; /* Only allow this to be set to zero */ - r = get_user(hior, (u64 __user *)reg->addr); - if (!r && (hior != 0)) + if (set_reg_val(id, *val)) r = -EINVAL; break; - } + case KVM_REG_PPC_DABR: + vcpu->arch.dabr = set_reg_val(id, *val); + break; + case KVM_REG_PPC_DSCR: + vcpu->arch.dscr = set_reg_val(id, *val); + break; + case KVM_REG_PPC_PURR: + vcpu->arch.purr = set_reg_val(id, *val); + break; + case KVM_REG_PPC_SPURR: + vcpu->arch.spurr = set_reg_val(id, *val); + break; + case KVM_REG_PPC_AMR: + vcpu->arch.amr = set_reg_val(id, *val); + break; + case KVM_REG_PPC_UAMOR: + vcpu->arch.uamor = set_reg_val(id, *val); + break; + case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRA: + i = id - KVM_REG_PPC_MMCR0; + vcpu->arch.mmcr[i] = set_reg_val(id, *val); + break; + case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: + i = id - KVM_REG_PPC_PMC1; + vcpu->arch.pmc[i] = set_reg_val(id, *val); + break; +#ifdef CONFIG_VSX + case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: + if (cpu_has_feature(CPU_FTR_VSX)) { + /* VSX => FP reg i is stored in arch.vsr[2*i] */ + long int i = id - KVM_REG_PPC_FPR0; + vcpu->arch.vsr[2 * i] = set_reg_val(id, *val); + } else { + /* let generic code handle it */ + r = -EINVAL; + } + break; + case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: + if (cpu_has_feature(CPU_FTR_VSX)) { + long int i = id - KVM_REG_PPC_VSR0; + vcpu->arch.vsr[2 * i] = val->vsxval[0]; + vcpu->arch.vsr[2 * i + 1] = val->vsxval[1]; + } else { + r = -ENXIO; + } + break; +#endif /* CONFIG_VSX */ + case KVM_REG_PPC_VPA_ADDR: + addr = set_reg_val(id, *val); + r = -EINVAL; + if (!addr && (vcpu->arch.slb_shadow.next_gpa || + vcpu->arch.dtl.next_gpa)) + break; + r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); + break; + case KVM_REG_PPC_VPA_SLB: + addr = val->vpaval.addr; + len = val->vpaval.length; + r = -EINVAL; + if (addr && !vcpu->arch.vpa.next_gpa) + break; + r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); + break; + case KVM_REG_PPC_VPA_DTL: + addr = val->vpaval.addr; + len = val->vpaval.length; + r = -EINVAL; + if (len < sizeof(struct dtl_entry)) + break; + if (addr && !vcpu->arch.vpa.next_gpa) + break; + len -= len % sizeof(struct dtl_entry); + r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); + break; default: + r = -EINVAL; break; } @@ -697,17 +862,11 @@ extern void xics_wake_cpu(int cpu); static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, struct kvm_vcpu *vcpu) { - struct kvm_vcpu *v; - if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) return; vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; --vc->n_runnable; ++vc->n_busy; - /* decrement the physical thread id of each following vcpu */ - v = vcpu; - list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list) - --v->arch.ptid; list_del(&vcpu->arch.run_list); } @@ -820,6 +979,7 @@ static int kvmppc_run_core(struct kvmppc_vcore *vc) long ret; u64 now; int ptid, i, need_vpa_update; + int srcu_idx; /* don't start if any threads have a signal pending */ need_vpa_update = 0; @@ -898,6 +1058,9 @@ static int kvmppc_run_core(struct kvmppc_vcore *vc) spin_unlock(&vc->lock); kvm_guest_enter(); + + srcu_idx = srcu_read_lock(&vcpu0->kvm->srcu); + __kvmppc_vcore_entry(NULL, vcpu0); for (i = 0; i < threads_per_core; ++i) kvmppc_release_hwthread(vc->pcpu + i); @@ -913,6 +1076,8 @@ static int kvmppc_run_core(struct kvmppc_vcore *vc) vc->vcore_state = VCORE_EXITING; spin_unlock(&vc->lock); + srcu_read_unlock(&vcpu0->kvm->srcu, srcu_idx); + /* make sure updates to secondary vcpu structs are visible now */ smp_mb(); kvm_guest_exit(); @@ -1273,7 +1438,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) n = kvm_dirty_bitmap_bytes(memslot); memset(memslot->dirty_bitmap, 0, n); - r = kvmppc_hv_get_dirty_log(kvm, memslot); + r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap); if (r) goto out; @@ -1299,53 +1464,86 @@ static unsigned long slb_pgsize_encoding(unsigned long psize) return senc; } -int kvmppc_core_prepare_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem) +static void unpin_slot(struct kvm_memory_slot *memslot) { - unsigned long npages; - unsigned long *phys; + unsigned long *physp; + unsigned long j, npages, pfn; + struct page *page; - /* Allocate a slot_phys array */ - phys = kvm->arch.slot_phys[mem->slot]; - if (!kvm->arch.using_mmu_notifiers && !phys) { - npages = mem->memory_size >> PAGE_SHIFT; - phys = vzalloc(npages * sizeof(unsigned long)); - if (!phys) - return -ENOMEM; - kvm->arch.slot_phys[mem->slot] = phys; - kvm->arch.slot_npages[mem->slot] = npages; + physp = memslot->arch.slot_phys; + npages = memslot->npages; + if (!physp) + return; + for (j = 0; j < npages; j++) { + if (!(physp[j] & KVMPPC_GOT_PAGE)) + continue; + pfn = physp[j] >> PAGE_SHIFT; + page = pfn_to_page(pfn); + SetPageDirty(page); + put_page(page); } +} + +void kvmppc_core_free_memslot(struct kvm_memory_slot *free, + struct kvm_memory_slot *dont) +{ + if (!dont || free->arch.rmap != dont->arch.rmap) { + vfree(free->arch.rmap); + free->arch.rmap = NULL; + } + if (!dont || free->arch.slot_phys != dont->arch.slot_phys) { + unpin_slot(free); + vfree(free->arch.slot_phys); + free->arch.slot_phys = NULL; + } +} + +int kvmppc_core_create_memslot(struct kvm_memory_slot *slot, + unsigned long npages) +{ + slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); + if (!slot->arch.rmap) + return -ENOMEM; + slot->arch.slot_phys = NULL; return 0; } -static void unpin_slot(struct kvm *kvm, int slot_id) +int kvmppc_core_prepare_memory_region(struct kvm *kvm, + struct kvm_memory_slot *memslot, + struct kvm_userspace_memory_region *mem) { - unsigned long *physp; - unsigned long j, npages, pfn; - struct page *page; + unsigned long *phys; - physp = kvm->arch.slot_phys[slot_id]; - npages = kvm->arch.slot_npages[slot_id]; - if (physp) { - spin_lock(&kvm->arch.slot_phys_lock); - for (j = 0; j < npages; j++) { - if (!(physp[j] & KVMPPC_GOT_PAGE)) - continue; - pfn = physp[j] >> PAGE_SHIFT; - page = pfn_to_page(pfn); - SetPageDirty(page); - put_page(page); - } - kvm->arch.slot_phys[slot_id] = NULL; - spin_unlock(&kvm->arch.slot_phys_lock); - vfree(physp); + /* Allocate a slot_phys array if needed */ + phys = memslot->arch.slot_phys; + if (!kvm->arch.using_mmu_notifiers && !phys && memslot->npages) { + phys = vzalloc(memslot->npages * sizeof(unsigned long)); + if (!phys) + return -ENOMEM; + memslot->arch.slot_phys = phys; } + + return 0; } void kvmppc_core_commit_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + struct kvm_memory_slot old) { + unsigned long npages = mem->memory_size >> PAGE_SHIFT; + struct kvm_memory_slot *memslot; + + if (npages && old.npages) { + /* + * If modifying a memslot, reset all the rmap dirty bits. + * If this is a new memslot, we don't need to do anything + * since the rmap array starts out as all zeroes, + * i.e. no pages are dirty. + */ + memslot = id_to_memslot(kvm->memslots, mem->slot); + kvmppc_hv_get_dirty_log(kvm, memslot, NULL); + } } static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) @@ -1362,6 +1560,7 @@ static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) unsigned long rmls; unsigned long *physp; unsigned long i, npages; + int srcu_idx; mutex_lock(&kvm->lock); if (kvm->arch.rma_setup_done) @@ -1377,12 +1576,13 @@ static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) } /* Look up the memslot for guest physical address 0 */ + srcu_idx = srcu_read_lock(&kvm->srcu); memslot = gfn_to_memslot(kvm, 0); /* We must have some memory at 0 by now */ err = -EINVAL; if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) - goto out; + goto out_srcu; /* Look up the VMA for the start of this memory slot */ hva = memslot->userspace_addr; @@ -1406,14 +1606,14 @@ static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) err = -EPERM; if (cpu_has_feature(CPU_FTR_ARCH_201)) { pr_err("KVM: CPU requires an RMO\n"); - goto out; + goto out_srcu; } /* We can handle 4k, 64k or 16M pages in the VRMA */ err = -EINVAL; if (!(psize == 0x1000 || psize == 0x10000 || psize == 0x1000000)) - goto out; + goto out_srcu; /* Update VRMASD field in the LPCR */ senc = slb_pgsize_encoding(psize); @@ -1436,7 +1636,7 @@ static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) err = -EINVAL; if (rmls < 0) { pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size); - goto out; + goto out_srcu; } atomic_inc(&ri->use_count); kvm->arch.rma = ri; @@ -1465,17 +1665,24 @@ static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) /* Initialize phys addrs of pages in RMO */ npages = ri->npages; porder = __ilog2(npages); - physp = kvm->arch.slot_phys[memslot->id]; - spin_lock(&kvm->arch.slot_phys_lock); - for (i = 0; i < npages; ++i) - physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + porder; - spin_unlock(&kvm->arch.slot_phys_lock); + physp = memslot->arch.slot_phys; + if (physp) { + if (npages > memslot->npages) + npages = memslot->npages; + spin_lock(&kvm->arch.slot_phys_lock); + for (i = 0; i < npages; ++i) + physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + + porder; + spin_unlock(&kvm->arch.slot_phys_lock); + } } /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */ smp_wmb(); kvm->arch.rma_setup_done = 1; err = 0; + out_srcu: + srcu_read_unlock(&kvm->srcu, srcu_idx); out: mutex_unlock(&kvm->lock); return err; @@ -1528,12 +1735,6 @@ int kvmppc_core_init_vm(struct kvm *kvm) void kvmppc_core_destroy_vm(struct kvm *kvm) { - unsigned long i; - - if (!kvm->arch.using_mmu_notifiers) - for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) - unpin_slot(kvm, i); - if (kvm->arch.rma) { kvm_release_rma(kvm->arch.rma); kvm->arch.rma = NULL; diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c index fb4eac290fe..ec0a9e5de10 100644 --- a/arch/powerpc/kvm/book3s_hv_builtin.c +++ b/arch/powerpc/kvm/book3s_hv_builtin.c @@ -157,8 +157,8 @@ static void __init kvm_linear_init_one(ulong size, int count, int type) linear_info = alloc_bootmem(count * sizeof(struct kvmppc_linear_info)); for (i = 0; i < count; ++i) { linear = alloc_bootmem_align(size, size); - pr_info("Allocated KVM %s at %p (%ld MB)\n", typestr, linear, - size >> 20); + pr_debug("Allocated KVM %s at %p (%ld MB)\n", typestr, linear, + size >> 20); linear_info[i].base_virt = linear; linear_info[i].base_pfn = __pa(linear) >> PAGE_SHIFT; linear_info[i].npages = npages; diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c index fb0e821622d..5e06e315388 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c +++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c @@ -81,7 +81,7 @@ static void remove_revmap_chain(struct kvm *kvm, long pte_index, ptel = rev->guest_rpte |= rcbits; gfn = hpte_rpn(ptel, hpte_page_size(hpte_v, ptel)); memslot = __gfn_to_memslot(kvm_memslots(kvm), gfn); - if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) + if (!memslot) return; rmap = real_vmalloc_addr(&memslot->arch.rmap[gfn - memslot->base_gfn]); @@ -183,7 +183,7 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, rmap = &memslot->arch.rmap[slot_fn]; if (!kvm->arch.using_mmu_notifiers) { - physp = kvm->arch.slot_phys[memslot->id]; + physp = memslot->arch.slot_phys; if (!physp) return H_PARAMETER; physp += slot_fn; @@ -297,7 +297,7 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, lock_rmap(rmap); /* Check for pending invalidations under the rmap chain lock */ if (kvm->arch.using_mmu_notifiers && - mmu_notifier_retry(vcpu, mmu_seq)) { + mmu_notifier_retry(vcpu->kvm, mmu_seq)) { /* inval in progress, write a non-present HPTE */ pteh |= HPTE_V_ABSENT; pteh &= ~HPTE_V_VALID; diff --git a/arch/powerpc/kvm/book3s_mmu_hpte.c b/arch/powerpc/kvm/book3s_mmu_hpte.c index 41cb0017e75..2c86b0d6371 100644 --- a/arch/powerpc/kvm/book3s_mmu_hpte.c +++ b/arch/powerpc/kvm/book3s_mmu_hpte.c @@ -114,11 +114,6 @@ static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte) hlist_del_init_rcu(&pte->list_vpte); hlist_del_init_rcu(&pte->list_vpte_long); - if (pte->pte.may_write) - kvm_release_pfn_dirty(pte->pfn); - else - kvm_release_pfn_clean(pte->pfn); - spin_unlock(&vcpu3s->mmu_lock); vcpu3s->hpte_cache_count--; diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 05c28f59f77..b853696b6d8 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -52,8 +52,6 @@ static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr, #define MSR_USER32 MSR_USER #define MSR_USER64 MSR_USER #define HW_PAGE_SIZE PAGE_SIZE -#define __hard_irq_disable local_irq_disable -#define __hard_irq_enable local_irq_enable #endif void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) @@ -66,7 +64,7 @@ void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max; svcpu_put(svcpu); #endif - + vcpu->cpu = smp_processor_id(); #ifdef CONFIG_PPC_BOOK3S_32 current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu; #endif @@ -86,8 +84,64 @@ void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) kvmppc_giveup_ext(vcpu, MSR_FP); kvmppc_giveup_ext(vcpu, MSR_VEC); kvmppc_giveup_ext(vcpu, MSR_VSX); + vcpu->cpu = -1; +} + +int kvmppc_core_check_requests(struct kvm_vcpu *vcpu) +{ + int r = 1; /* Indicate we want to get back into the guest */ + + /* We misuse TLB_FLUSH to indicate that we want to clear + all shadow cache entries */ + if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) + kvmppc_mmu_pte_flush(vcpu, 0, 0); + + return r; +} + +/************* MMU Notifiers *************/ + +int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) +{ + trace_kvm_unmap_hva(hva); + + /* + * Flush all shadow tlb entries everywhere. This is slow, but + * we are 100% sure that we catch the to be unmapped page + */ + kvm_flush_remote_tlbs(kvm); + + return 0; +} + +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +{ + /* kvm_unmap_hva flushes everything anyways */ + kvm_unmap_hva(kvm, start); + + return 0; +} + +int kvm_age_hva(struct kvm *kvm, unsigned long hva) +{ + /* XXX could be more clever ;) */ + return 0; +} + +int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) +{ + /* XXX could be more clever ;) */ + return 0; +} + +void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) +{ + /* The page will get remapped properly on its next fault */ + kvm_unmap_hva(kvm, hva); } +/*****************************************/ + static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu) { ulong smsr = vcpu->arch.shared->msr; @@ -540,18 +594,18 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int exit_nr) { int r = RESUME_HOST; + int s; vcpu->stat.sum_exits++; run->exit_reason = KVM_EXIT_UNKNOWN; run->ready_for_interrupt_injection = 1; - /* We get here with MSR.EE=0, so enable it to be a nice citizen */ - __hard_irq_enable(); + /* We get here with MSR.EE=1 */ + + trace_kvm_exit(exit_nr, vcpu); + kvm_guest_exit(); - trace_kvm_book3s_exit(exit_nr, vcpu); - preempt_enable(); - kvm_resched(vcpu); switch (exit_nr) { case BOOK3S_INTERRUPT_INST_STORAGE: { @@ -802,7 +856,6 @@ program_interrupt: } } - preempt_disable(); if (!(r & RESUME_HOST)) { /* To avoid clobbering exit_reason, only check for signals if * we aren't already exiting to userspace for some other @@ -814,20 +867,13 @@ program_interrupt: * and if we really did time things so badly, then we just exit * again due to a host external interrupt. */ - __hard_irq_disable(); - if (signal_pending(current)) { - __hard_irq_enable(); -#ifdef EXIT_DEBUG - printk(KERN_EMERG "KVM: Going back to host\n"); -#endif - vcpu->stat.signal_exits++; - run->exit_reason = KVM_EXIT_INTR; - r = -EINTR; + local_irq_disable(); + s = kvmppc_prepare_to_enter(vcpu); + if (s <= 0) { + local_irq_enable(); + r = s; } else { - /* In case an interrupt came in that was triggered - * from userspace (like DEC), we need to check what - * to inject now! */ - kvmppc_core_prepare_to_enter(vcpu); + kvmppc_lazy_ee_enable(); } } @@ -899,34 +945,59 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, return 0; } -int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) +int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) { - int r = -EINVAL; + int r = 0; - switch (reg->id) { + switch (id) { case KVM_REG_PPC_HIOR: - r = copy_to_user((u64 __user *)(long)reg->addr, - &to_book3s(vcpu)->hior, sizeof(u64)); + *val = get_reg_val(id, to_book3s(vcpu)->hior); + break; +#ifdef CONFIG_VSX + case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: { + long int i = id - KVM_REG_PPC_VSR0; + + if (!cpu_has_feature(CPU_FTR_VSX)) { + r = -ENXIO; + break; + } + val->vsxval[0] = vcpu->arch.fpr[i]; + val->vsxval[1] = vcpu->arch.vsr[i]; break; + } +#endif /* CONFIG_VSX */ default: + r = -EINVAL; break; } return r; } -int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) +int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) { - int r = -EINVAL; + int r = 0; - switch (reg->id) { + switch (id) { case KVM_REG_PPC_HIOR: - r = copy_from_user(&to_book3s(vcpu)->hior, - (u64 __user *)(long)reg->addr, sizeof(u64)); - if (!r) - to_book3s(vcpu)->hior_explicit = true; + to_book3s(vcpu)->hior = set_reg_val(id, *val); + to_book3s(vcpu)->hior_explicit = true; + break; +#ifdef CONFIG_VSX + case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: { + long int i = id - KVM_REG_PPC_VSR0; + + if (!cpu_has_feature(CPU_FTR_VSX)) { + r = -ENXIO; + break; + } + vcpu->arch.fpr[i] = val->vsxval[0]; + vcpu->arch.vsr[i] = val->vsxval[1]; break; + } +#endif /* CONFIG_VSX */ default: + r = -EINVAL; break; } @@ -1020,8 +1091,6 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) #endif ulong ext_msr; - preempt_disable(); - /* Check if we can run the vcpu at all */ if (!vcpu->arch.sane) { kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR; @@ -1029,21 +1098,16 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) goto out; } - kvmppc_core_prepare_to_enter(vcpu); - /* * Interrupts could be timers for the guest which we have to inject * again, so let's postpone them until we're in the guest and if we * really did time things so badly, then we just exit again due to * a host external interrupt. */ - __hard_irq_disable(); - - /* No need to go into the guest when all we do is going out */ - if (signal_pending(current)) { - __hard_irq_enable(); - kvm_run->exit_reason = KVM_EXIT_INTR; - ret = -EINTR; + local_irq_disable(); + ret = kvmppc_prepare_to_enter(vcpu); + if (ret <= 0) { + local_irq_enable(); goto out; } @@ -1080,11 +1144,12 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) if (vcpu->arch.shared->msr & MSR_FP) kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP); - kvm_guest_enter(); + kvmppc_lazy_ee_enable(); ret = __kvmppc_vcpu_run(kvm_run, vcpu); - kvm_guest_exit(); + /* No need for kvm_guest_exit. It's done in handle_exit. + We also get here with interrupts enabled. */ current->thread.regs->msr = ext_msr; @@ -1113,7 +1178,7 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) #endif out: - preempt_enable(); + vcpu->mode = OUTSIDE_GUEST_MODE; return ret; } @@ -1181,14 +1246,31 @@ int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info) } #endif /* CONFIG_PPC64 */ +void kvmppc_core_free_memslot(struct kvm_memory_slot *free, + struct kvm_memory_slot *dont) +{ +} + +int kvmppc_core_create_memslot(struct kvm_memory_slot *slot, + unsigned long npages) +{ + return 0; +} + int kvmppc_core_prepare_memory_region(struct kvm *kvm, + struct kvm_memory_slot *memslot, struct kvm_userspace_memory_region *mem) { return 0; } void kvmppc_core_commit_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + struct kvm_memory_slot old) +{ +} + +void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) { } diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S b/arch/powerpc/kvm/book3s_rmhandlers.S index 9ecf6e35cd8..b2f8258b545 100644 --- a/arch/powerpc/kvm/book3s_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_rmhandlers.S @@ -170,20 +170,21 @@ kvmppc_handler_skip_ins: * Call kvmppc_handler_trampoline_enter in real mode * * On entry, r4 contains the guest shadow MSR + * MSR.EE has to be 0 when calling this function */ _GLOBAL(kvmppc_entry_trampoline) mfmsr r5 LOAD_REG_ADDR(r7, kvmppc_handler_trampoline_enter) toreal(r7) - li r9, MSR_RI - ori r9, r9, MSR_EE - andc r9, r5, r9 /* Clear EE and RI in MSR value */ li r6, MSR_IR | MSR_DR - ori r6, r6, MSR_EE - andc r6, r5, r6 /* Clear EE, DR and IR in MSR value */ - MTMSR_EERI(r9) /* Clear EE and RI in MSR */ - mtsrr0 r7 /* before we set srr0/1 */ + andc r6, r5, r6 /* Clear DR and IR in MSR value */ + /* + * Set EE in HOST_MSR so that it's enabled when we get into our + * C exit handler function + */ + ori r5, r5, MSR_EE + mtsrr0 r7 mtsrr1 r6 RFI diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index d25a097c852..3d1f35dc786 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -39,6 +39,7 @@ #include "timing.h" #include "booke.h" +#include "trace.h" unsigned long kvmppc_booke_handlers; @@ -62,6 +63,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "halt_wakeup", VCPU_STAT(halt_wakeup) }, { "doorbell", VCPU_STAT(dbell_exits) }, { "guest doorbell", VCPU_STAT(gdbell_exits) }, + { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, { NULL } }; @@ -120,6 +122,16 @@ static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu) } #endif +static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) +{ +#if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV) + /* We always treat the FP bit as enabled from the host + perspective, so only need to adjust the shadow MSR */ + vcpu->arch.shadow_msr &= ~MSR_FP; + vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP; +#endif +} + /* * Helper function for "full" MSR writes. No need to call this if only * EE/CE/ME/DE/RI are changing. @@ -136,11 +148,13 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) kvmppc_mmu_msr_notify(vcpu, old_msr); kvmppc_vcpu_sync_spe(vcpu); + kvmppc_vcpu_sync_fpu(vcpu); } static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int priority) { + trace_kvm_booke_queue_irqprio(vcpu, priority); set_bit(priority, &vcpu->arch.pending_exceptions); } @@ -206,6 +220,16 @@ void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); } +static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu) +{ + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG); +} + +static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu) +{ + clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); +} + static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) { #ifdef CONFIG_KVM_BOOKE_HV @@ -325,6 +349,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, msr_mask = MSR_CE | MSR_ME | MSR_DE; int_class = INT_CLASS_NONCRIT; break; + case BOOKE_IRQPRIO_WATCHDOG: case BOOKE_IRQPRIO_CRITICAL: case BOOKE_IRQPRIO_DBELL_CRIT: allowed = vcpu->arch.shared->msr & MSR_CE; @@ -404,12 +429,121 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, return allowed; } +/* + * Return the number of jiffies until the next timeout. If the timeout is + * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA + * because the larger value can break the timer APIs. + */ +static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu) +{ + u64 tb, wdt_tb, wdt_ticks = 0; + u64 nr_jiffies = 0; + u32 period = TCR_GET_WP(vcpu->arch.tcr); + + wdt_tb = 1ULL << (63 - period); + tb = get_tb(); + /* + * The watchdog timeout will hapeen when TB bit corresponding + * to watchdog will toggle from 0 to 1. + */ + if (tb & wdt_tb) + wdt_ticks = wdt_tb; + + wdt_ticks += wdt_tb - (tb & (wdt_tb - 1)); + + /* Convert timebase ticks to jiffies */ + nr_jiffies = wdt_ticks; + + if (do_div(nr_jiffies, tb_ticks_per_jiffy)) + nr_jiffies++; + + return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA); +} + +static void arm_next_watchdog(struct kvm_vcpu *vcpu) +{ + unsigned long nr_jiffies; + unsigned long flags; + + /* + * If TSR_ENW and TSR_WIS are not set then no need to exit to + * userspace, so clear the KVM_REQ_WATCHDOG request. + */ + if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS)) + clear_bit(KVM_REQ_WATCHDOG, &vcpu->requests); + + spin_lock_irqsave(&vcpu->arch.wdt_lock, flags); + nr_jiffies = watchdog_next_timeout(vcpu); + /* + * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA + * then do not run the watchdog timer as this can break timer APIs. + */ + if (nr_jiffies < NEXT_TIMER_MAX_DELTA) + mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies); + else + del_timer(&vcpu->arch.wdt_timer); + spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags); +} + +void kvmppc_watchdog_func(unsigned long data) +{ + struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; + u32 tsr, new_tsr; + int final; + + do { + new_tsr = tsr = vcpu->arch.tsr; + final = 0; + + /* Time out event */ + if (tsr & TSR_ENW) { + if (tsr & TSR_WIS) + final = 1; + else + new_tsr = tsr | TSR_WIS; + } else { + new_tsr = tsr | TSR_ENW; + } + } while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr); + + if (new_tsr & TSR_WIS) { + smp_wmb(); + kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu); + kvm_vcpu_kick(vcpu); + } + + /* + * If this is final watchdog expiry and some action is required + * then exit to userspace. + */ + if (final && (vcpu->arch.tcr & TCR_WRC_MASK) && + vcpu->arch.watchdog_enabled) { + smp_wmb(); + kvm_make_request(KVM_REQ_WATCHDOG, vcpu); + kvm_vcpu_kick(vcpu); + } + + /* + * Stop running the watchdog timer after final expiration to + * prevent the host from being flooded with timers if the + * guest sets a short period. + * Timers will resume when TSR/TCR is updated next time. + */ + if (!final) + arm_next_watchdog(vcpu); +} + static void update_timer_ints(struct kvm_vcpu *vcpu) { if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS)) kvmppc_core_queue_dec(vcpu); else kvmppc_core_dequeue_dec(vcpu); + + if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS)) + kvmppc_core_queue_watchdog(vcpu); + else + kvmppc_core_dequeue_watchdog(vcpu); } static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) @@ -417,13 +551,6 @@ static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) unsigned long *pending = &vcpu->arch.pending_exceptions; unsigned int priority; - if (vcpu->requests) { - if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) { - smp_mb(); - update_timer_ints(vcpu); - } - } - priority = __ffs(*pending); while (priority < BOOKE_IRQPRIO_MAX) { if (kvmppc_booke_irqprio_deliver(vcpu, priority)) @@ -459,37 +586,20 @@ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) return r; } -/* - * Common checks before entering the guest world. Call with interrupts - * disabled. - * - * returns !0 if a signal is pending and check_signal is true - */ -static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) +int kvmppc_core_check_requests(struct kvm_vcpu *vcpu) { - int r = 0; - - WARN_ON_ONCE(!irqs_disabled()); - while (true) { - if (need_resched()) { - local_irq_enable(); - cond_resched(); - local_irq_disable(); - continue; - } - - if (signal_pending(current)) { - r = 1; - break; - } + int r = 1; /* Indicate we want to get back into the guest */ - if (kvmppc_core_prepare_to_enter(vcpu)) { - /* interrupts got enabled in between, so we - are back at square 1 */ - continue; - } + if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) + update_timer_ints(vcpu); +#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) + if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) + kvmppc_core_flush_tlb(vcpu); +#endif - break; + if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) { + vcpu->run->exit_reason = KVM_EXIT_WATCHDOG; + r = 0; } return r; @@ -497,7 +607,7 @@ static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) { - int ret; + int ret, s; #ifdef CONFIG_PPC_FPU unsigned int fpscr; int fpexc_mode; @@ -510,11 +620,13 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) } local_irq_disable(); - if (kvmppc_prepare_to_enter(vcpu)) { - kvm_run->exit_reason = KVM_EXIT_INTR; - ret = -EINTR; + s = kvmppc_prepare_to_enter(vcpu); + if (s <= 0) { + local_irq_enable(); + ret = s; goto out; } + kvmppc_lazy_ee_enable(); kvm_guest_enter(); @@ -542,6 +654,9 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) ret = __kvmppc_vcpu_run(kvm_run, vcpu); + /* No need for kvm_guest_exit. It's done in handle_exit. + We also get here with interrupts enabled. */ + #ifdef CONFIG_PPC_FPU kvmppc_save_guest_fp(vcpu); @@ -557,10 +672,8 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) current->thread.fpexc_mode = fpexc_mode; #endif - kvm_guest_exit(); - out: - local_irq_enable(); + vcpu->mode = OUTSIDE_GUEST_MODE; return ret; } @@ -668,6 +781,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int exit_nr) { int r = RESUME_HOST; + int s; /* update before a new last_exit_type is rewritten */ kvmppc_update_timing_stats(vcpu); @@ -677,6 +791,9 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, local_irq_enable(); + trace_kvm_exit(exit_nr, vcpu); + kvm_guest_exit(); + run->exit_reason = KVM_EXIT_UNKNOWN; run->ready_for_interrupt_injection = 1; @@ -971,10 +1088,12 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, */ if (!(r & RESUME_HOST)) { local_irq_disable(); - if (kvmppc_prepare_to_enter(vcpu)) { - run->exit_reason = KVM_EXIT_INTR; - r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); - kvmppc_account_exit(vcpu, SIGNAL_EXITS); + s = kvmppc_prepare_to_enter(vcpu); + if (s <= 0) { + local_irq_enable(); + r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV); + } else { + kvmppc_lazy_ee_enable(); } } @@ -1011,6 +1130,21 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) return r; } +int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) +{ + /* setup watchdog timer once */ + spin_lock_init(&vcpu->arch.wdt_lock); + setup_timer(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, + (unsigned long)vcpu); + + return 0; +} + +void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) +{ + del_timer_sync(&vcpu->arch.wdt_timer); +} + int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) { int i; @@ -1106,7 +1240,13 @@ static int set_sregs_base(struct kvm_vcpu *vcpu, } if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) { + u32 old_tsr = vcpu->arch.tsr; + vcpu->arch.tsr = sregs->u.e.tsr; + + if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS)) + arm_next_watchdog(vcpu); + update_timer_ints(vcpu); } @@ -1221,12 +1361,56 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) { - return -EINVAL; + int r = -EINVAL; + + switch (reg->id) { + case KVM_REG_PPC_IAC1: + case KVM_REG_PPC_IAC2: + case KVM_REG_PPC_IAC3: + case KVM_REG_PPC_IAC4: { + int iac = reg->id - KVM_REG_PPC_IAC1; + r = copy_to_user((u64 __user *)(long)reg->addr, + &vcpu->arch.dbg_reg.iac[iac], sizeof(u64)); + break; + } + case KVM_REG_PPC_DAC1: + case KVM_REG_PPC_DAC2: { + int dac = reg->id - KVM_REG_PPC_DAC1; + r = copy_to_user((u64 __user *)(long)reg->addr, + &vcpu->arch.dbg_reg.dac[dac], sizeof(u64)); + break; + } + default: + break; + } + return r; } int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) { - return -EINVAL; + int r = -EINVAL; + + switch (reg->id) { + case KVM_REG_PPC_IAC1: + case KVM_REG_PPC_IAC2: + case KVM_REG_PPC_IAC3: + case KVM_REG_PPC_IAC4: { + int iac = reg->id - KVM_REG_PPC_IAC1; + r = copy_from_user(&vcpu->arch.dbg_reg.iac[iac], + (u64 __user *)(long)reg->addr, sizeof(u64)); + break; + } + case KVM_REG_PPC_DAC1: + case KVM_REG_PPC_DAC2: { + int dac = reg->id - KVM_REG_PPC_DAC1; + r = copy_from_user(&vcpu->arch.dbg_reg.dac[dac], + (u64 __user *)(long)reg->addr, sizeof(u64)); + break; + } + default: + break; + } + return r; } int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) @@ -1253,20 +1437,38 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) return -ENOTSUPP; } +void kvmppc_core_free_memslot(struct kvm_memory_slot *free, + struct kvm_memory_slot *dont) +{ +} + +int kvmppc_core_create_memslot(struct kvm_memory_slot *slot, + unsigned long npages) +{ + return 0; +} + int kvmppc_core_prepare_memory_region(struct kvm *kvm, + struct kvm_memory_slot *memslot, struct kvm_userspace_memory_region *mem) { return 0; } void kvmppc_core_commit_memory_region(struct kvm *kvm, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + struct kvm_memory_slot old) +{ +} + +void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot) { } void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr) { vcpu->arch.tcr = new_tcr; + arm_next_watchdog(vcpu); update_timer_ints(vcpu); } @@ -1281,6 +1483,14 @@ void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits) { clear_bits(tsr_bits, &vcpu->arch.tsr); + + /* + * We may have stopped the watchdog due to + * being stuck on final expiration. + */ + if (tsr_bits & (TSR_ENW | TSR_WIS)) + arm_next_watchdog(vcpu); + update_timer_ints(vcpu); } @@ -1298,12 +1508,14 @@ void kvmppc_decrementer_func(unsigned long data) void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { + vcpu->cpu = smp_processor_id(); current->thread.kvm_vcpu = vcpu; } void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu) { current->thread.kvm_vcpu = NULL; + vcpu->cpu = -1; } int __init kvmppc_booke_init(void) diff --git a/arch/powerpc/kvm/booke_emulate.c b/arch/powerpc/kvm/booke_emulate.c index 12834bb608a..514790f41ab 100644 --- a/arch/powerpc/kvm/booke_emulate.c +++ b/arch/powerpc/kvm/booke_emulate.c @@ -133,10 +133,10 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) vcpu->arch.csrr1 = spr_val; break; case SPRN_DBCR0: - vcpu->arch.dbcr0 = spr_val; + vcpu->arch.dbg_reg.dbcr0 = spr_val; break; case SPRN_DBCR1: - vcpu->arch.dbcr1 = spr_val; + vcpu->arch.dbg_reg.dbcr1 = spr_val; break; case SPRN_DBSR: vcpu->arch.dbsr &= ~spr_val; @@ -145,6 +145,14 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) kvmppc_clr_tsr_bits(vcpu, spr_val); break; case SPRN_TCR: + /* + * WRC is a 2-bit field that is supposed to preserve its + * value once written to non-zero. + */ + if (vcpu->arch.tcr & TCR_WRC_MASK) { + spr_val &= ~TCR_WRC_MASK; + spr_val |= vcpu->arch.tcr & TCR_WRC_MASK; + } kvmppc_set_tcr(vcpu, spr_val); break; @@ -229,6 +237,9 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) case SPRN_IVOR15: vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = spr_val; break; + case SPRN_MCSR: + vcpu->arch.mcsr &= ~spr_val; + break; default: emulated = EMULATE_FAIL; @@ -258,10 +269,10 @@ int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) *spr_val = vcpu->arch.csrr1; break; case SPRN_DBCR0: - *spr_val = vcpu->arch.dbcr0; + *spr_val = vcpu->arch.dbg_reg.dbcr0; break; case SPRN_DBCR1: - *spr_val = vcpu->arch.dbcr1; + *spr_val = vcpu->arch.dbg_reg.dbcr1; break; case SPRN_DBSR: *spr_val = vcpu->arch.dbsr; @@ -321,6 +332,9 @@ int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) case SPRN_IVOR15: *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG]; break; + case SPRN_MCSR: + *spr_val = vcpu->arch.mcsr; + break; default: emulated = EMULATE_FAIL; diff --git a/arch/powerpc/kvm/e500.h b/arch/powerpc/kvm/e500.h index aa8b81428bf..d1622864549 100644 --- a/arch/powerpc/kvm/e500.h +++ b/arch/powerpc/kvm/e500.h @@ -27,8 +27,7 @@ #define E500_TLB_NUM 2 #define E500_TLB_VALID 1 -#define E500_TLB_DIRTY 2 -#define E500_TLB_BITMAP 4 +#define E500_TLB_BITMAP 2 struct tlbe_ref { pfn_t pfn; diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c index ff38b664195..c73389477d1 100644 --- a/arch/powerpc/kvm/e500_tlb.c +++ b/arch/powerpc/kvm/e500_tlb.c @@ -304,17 +304,13 @@ static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref, ref->flags = E500_TLB_VALID; if (tlbe_is_writable(gtlbe)) - ref->flags |= E500_TLB_DIRTY; + kvm_set_pfn_dirty(pfn); } static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref) { if (ref->flags & E500_TLB_VALID) { - if (ref->flags & E500_TLB_DIRTY) - kvm_release_pfn_dirty(ref->pfn); - else - kvm_release_pfn_clean(ref->pfn); - + trace_kvm_booke206_ref_release(ref->pfn, ref->flags); ref->flags = 0; } } @@ -357,6 +353,13 @@ static void clear_tlb_refs(struct kvmppc_vcpu_e500 *vcpu_e500) clear_tlb_privs(vcpu_e500); } +void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu) +{ + struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); + clear_tlb_refs(vcpu_e500); + clear_tlb1_bitmap(vcpu_e500); +} + static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu, unsigned int eaddr, int as) { @@ -541,6 +544,9 @@ static inline void kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, /* Clear i-cache for new pages */ kvmppc_mmu_flush_icache(pfn); + + /* Drop refcount on page, so that mmu notifiers can clear it */ + kvm_release_pfn_clean(pfn); } /* XXX only map the one-one case, for now use TLB0 */ @@ -1039,8 +1045,12 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, sesel = 0; /* unused */ priv = &vcpu_e500->gtlb_priv[tlbsel][esel]; - kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K, - &priv->ref, eaddr, &stlbe); + /* Only triggers after clear_tlb_refs */ + if (unlikely(!(priv->ref.flags & E500_TLB_VALID))) + kvmppc_e500_tlb0_map(vcpu_e500, esel, &stlbe); + else + kvmppc_e500_setup_stlbe(vcpu, gtlbe, BOOK3E_PAGESZ_4K, + &priv->ref, eaddr, &stlbe); break; case 1: { @@ -1060,6 +1070,49 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel); } +/************* MMU Notifiers *************/ + +int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) +{ + trace_kvm_unmap_hva(hva); + + /* + * Flush all shadow tlb entries everywhere. This is slow, but + * we are 100% sure that we catch the to be unmapped page + */ + kvm_flush_remote_tlbs(kvm); + + return 0; +} + +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +{ + /* kvm_unmap_hva flushes everything anyways */ + kvm_unmap_hva(kvm, start); + + return 0; +} + +int kvm_age_hva(struct kvm *kvm, unsigned long hva) +{ + /* XXX could be more clever ;) */ + return 0; +} + +int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) +{ + /* XXX could be more clever ;) */ + return 0; +} + +void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) +{ + /* The page will get remapped properly on its next fault */ + kvm_unmap_hva(kvm, hva); +} + +/*****************************************/ + static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500) { int i; @@ -1081,6 +1134,8 @@ static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500) } vcpu_e500->num_shared_tlb_pages = 0; + + kfree(vcpu_e500->shared_tlb_pages); vcpu_e500->shared_tlb_pages = NULL; } else { kfree(vcpu_e500->gtlb_arch); @@ -1178,21 +1233,27 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, } virt = vmap(pages, num_pages, VM_MAP, PAGE_KERNEL); - if (!virt) + if (!virt) { + ret = -ENOMEM; goto err_put_page; + } privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0], GFP_KERNEL); privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1], GFP_KERNEL); - if (!privs[0] || !privs[1]) - goto err_put_page; + if (!privs[0] || !privs[1]) { + ret = -ENOMEM; + goto err_privs; + } g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1], GFP_KERNEL); - if (!g2h_bitmap) - goto err_put_page; + if (!g2h_bitmap) { + ret = -ENOMEM; + goto err_privs; + } free_gtlb(vcpu_e500); @@ -1232,10 +1293,11 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, kvmppc_recalc_tlb1map_range(vcpu_e500); return 0; -err_put_page: +err_privs: kfree(privs[0]); kfree(privs[1]); +err_put_page: for (i = 0; i < num_pages; i++) put_page(pages[i]); @@ -1332,7 +1394,7 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500) if (!vcpu_e500->gtlb_priv[1]) goto err; - vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(unsigned int) * + vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(u64) * vcpu_e500->gtlb_params[1].entries, GFP_KERNEL); if (!vcpu_e500->g2h_tlb1_map) diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 4d213b8b0fb..deb0d596d81 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -30,6 +30,7 @@ #include <asm/kvm_ppc.h> #include <asm/tlbflush.h> #include <asm/cputhreads.h> +#include <asm/irqflags.h> #include "timing.h" #include "../mm/mmu_decl.h" @@ -38,8 +39,7 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) { - return !(v->arch.shared->msr & MSR_WE) || - !!(v->arch.pending_exceptions) || + return !!(v->arch.pending_exceptions) || v->requests; } @@ -48,6 +48,85 @@ int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) return 1; } +#ifndef CONFIG_KVM_BOOK3S_64_HV +/* + * Common checks before entering the guest world. Call with interrupts + * disabled. + * + * returns: + * + * == 1 if we're ready to go into guest state + * <= 0 if we need to go back to the host with return value + */ +int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) +{ + int r = 1; + + WARN_ON_ONCE(!irqs_disabled()); + while (true) { + if (need_resched()) { + local_irq_enable(); + cond_resched(); + local_irq_disable(); + continue; + } + + if (signal_pending(current)) { + kvmppc_account_exit(vcpu, SIGNAL_EXITS); + vcpu->run->exit_reason = KVM_EXIT_INTR; + r = -EINTR; + break; + } + + vcpu->mode = IN_GUEST_MODE; + + /* + * Reading vcpu->requests must happen after setting vcpu->mode, + * so we don't miss a request because the requester sees + * OUTSIDE_GUEST_MODE and assumes we'll be checking requests + * before next entering the guest (and thus doesn't IPI). + */ + smp_mb(); + + if (vcpu->requests) { + /* Make sure we process requests preemptable */ + local_irq_enable(); + trace_kvm_check_requests(vcpu); + r = kvmppc_core_check_requests(vcpu); + local_irq_disable(); + if (r > 0) + continue; + break; + } + + if (kvmppc_core_prepare_to_enter(vcpu)) { + /* interrupts got enabled in between, so we + are back at square 1 */ + continue; + } + +#ifdef CONFIG_PPC64 + /* lazy EE magic */ + hard_irq_disable(); + if (lazy_irq_pending()) { + /* Got an interrupt in between, try again */ + local_irq_enable(); + local_irq_disable(); + kvm_guest_exit(); + continue; + } + + trace_hardirqs_on(); +#endif + + kvm_guest_enter(); + break; + } + + return r; +} +#endif /* CONFIG_KVM_BOOK3S_64_HV */ + int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) { int nr = kvmppc_get_gpr(vcpu, 11); @@ -67,18 +146,18 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) } switch (nr) { - case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE: + case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE): { vcpu->arch.magic_page_pa = param1; vcpu->arch.magic_page_ea = param2; r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; - r = HC_EV_SUCCESS; + r = EV_SUCCESS; break; } - case HC_VENDOR_KVM | KVM_HC_FEATURES: - r = HC_EV_SUCCESS; + case KVM_HCALL_TOKEN(KVM_HC_FEATURES): + r = EV_SUCCESS; #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2) /* XXX Missing magic page on 44x */ r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); @@ -86,8 +165,13 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) /* Second return value is in r4 */ break; + case EV_HCALL_TOKEN(EV_IDLE): + r = EV_SUCCESS; + kvm_vcpu_block(vcpu); + clear_bit(KVM_REQ_UNHALT, &vcpu->requests); + break; default: - r = HC_EV_UNIMPLEMENTED; + r = EV_UNIMPLEMENTED; break; } @@ -220,6 +304,7 @@ int kvm_dev_ioctl_check_extension(long ext) switch (ext) { #ifdef CONFIG_BOOKE case KVM_CAP_PPC_BOOKE_SREGS: + case KVM_CAP_PPC_BOOKE_WATCHDOG: #else case KVM_CAP_PPC_SEGSTATE: case KVM_CAP_PPC_HIOR: @@ -260,10 +345,16 @@ int kvm_dev_ioctl_check_extension(long ext) if (cpu_has_feature(CPU_FTR_ARCH_201)) r = 2; break; +#endif case KVM_CAP_SYNC_MMU: +#ifdef CONFIG_KVM_BOOK3S_64_HV r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0; - break; +#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER) + r = 1; +#else + r = 0; #endif + break; case KVM_CAP_NR_VCPUS: /* * Recommending a number of CPUs is somewhat arbitrary; we @@ -302,19 +393,12 @@ long kvm_arch_dev_ioctl(struct file *filp, void kvm_arch_free_memslot(struct kvm_memory_slot *free, struct kvm_memory_slot *dont) { - if (!dont || free->arch.rmap != dont->arch.rmap) { - vfree(free->arch.rmap); - free->arch.rmap = NULL; - } + kvmppc_core_free_memslot(free, dont); } int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) { - slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); - if (!slot->arch.rmap) - return -ENOMEM; - - return 0; + return kvmppc_core_create_memslot(slot, npages); } int kvm_arch_prepare_memory_region(struct kvm *kvm, @@ -323,7 +407,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, int user_alloc) { - return kvmppc_core_prepare_memory_region(kvm, mem); + return kvmppc_core_prepare_memory_region(kvm, memslot, mem); } void kvm_arch_commit_memory_region(struct kvm *kvm, @@ -331,7 +415,7 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, struct kvm_memory_slot old, int user_alloc) { - kvmppc_core_commit_memory_region(kvm, mem); + kvmppc_core_commit_memory_region(kvm, mem, old); } void kvm_arch_flush_shadow_all(struct kvm *kvm) @@ -341,6 +425,7 @@ void kvm_arch_flush_shadow_all(struct kvm *kvm) void kvm_arch_flush_shadow_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) { + kvmppc_core_flush_memslot(kvm, slot); } struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) @@ -390,6 +475,8 @@ enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) { + int ret; + hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu); vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; @@ -398,13 +485,14 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) #ifdef CONFIG_KVM_EXIT_TIMING mutex_init(&vcpu->arch.exit_timing_lock); #endif - - return 0; + ret = kvmppc_subarch_vcpu_init(vcpu); + return ret; } void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) { kvmppc_mmu_destroy(vcpu); + kvmppc_subarch_vcpu_uninit(vcpu); } void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) @@ -420,7 +508,6 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); #endif kvmppc_core_vcpu_load(vcpu, cpu); - vcpu->cpu = smp_processor_id(); } void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) @@ -429,7 +516,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) #ifdef CONFIG_BOOKE vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); #endif - vcpu->cpu = -1; } int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, @@ -649,6 +735,12 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, r = 0; vcpu->arch.papr_enabled = true; break; +#ifdef CONFIG_BOOKE + case KVM_CAP_PPC_BOOKE_WATCHDOG: + r = 0; + vcpu->arch.watchdog_enabled = true; + break; +#endif #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) case KVM_CAP_SW_TLB: { struct kvm_config_tlb cfg; @@ -751,9 +843,16 @@ int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) { + u32 inst_nop = 0x60000000; +#ifdef CONFIG_KVM_BOOKE_HV + u32 inst_sc1 = 0x44000022; + pvinfo->hcall[0] = inst_sc1; + pvinfo->hcall[1] = inst_nop; + pvinfo->hcall[2] = inst_nop; + pvinfo->hcall[3] = inst_nop; +#else u32 inst_lis = 0x3c000000; u32 inst_ori = 0x60000000; - u32 inst_nop = 0x60000000; u32 inst_sc = 0x44000002; u32 inst_imm_mask = 0xffff; @@ -770,6 +869,9 @@ static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask); pvinfo->hcall[2] = inst_sc; pvinfo->hcall[3] = inst_nop; +#endif + + pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE; return 0; } diff --git a/arch/powerpc/kvm/trace.h b/arch/powerpc/kvm/trace.h index ddb6a2149d4..e326489a542 100644 --- a/arch/powerpc/kvm/trace.h +++ b/arch/powerpc/kvm/trace.h @@ -31,6 +31,126 @@ TRACE_EVENT(kvm_ppc_instr, __entry->inst, __entry->pc, __entry->emulate) ); +#ifdef CONFIG_PPC_BOOK3S +#define kvm_trace_symbol_exit \ + {0x100, "SYSTEM_RESET"}, \ + {0x200, "MACHINE_CHECK"}, \ + {0x300, "DATA_STORAGE"}, \ + {0x380, "DATA_SEGMENT"}, \ + {0x400, "INST_STORAGE"}, \ + {0x480, "INST_SEGMENT"}, \ + {0x500, "EXTERNAL"}, \ + {0x501, "EXTERNAL_LEVEL"}, \ + {0x502, "EXTERNAL_HV"}, \ + {0x600, "ALIGNMENT"}, \ + {0x700, "PROGRAM"}, \ + {0x800, "FP_UNAVAIL"}, \ + {0x900, "DECREMENTER"}, \ + {0x980, "HV_DECREMENTER"}, \ + {0xc00, "SYSCALL"}, \ + {0xd00, "TRACE"}, \ + {0xe00, "H_DATA_STORAGE"}, \ + {0xe20, "H_INST_STORAGE"}, \ + {0xe40, "H_EMUL_ASSIST"}, \ + {0xf00, "PERFMON"}, \ + {0xf20, "ALTIVEC"}, \ + {0xf40, "VSX"} +#else +#define kvm_trace_symbol_exit \ + {0, "CRITICAL"}, \ + {1, "MACHINE_CHECK"}, \ + {2, "DATA_STORAGE"}, \ + {3, "INST_STORAGE"}, \ + {4, "EXTERNAL"}, \ + {5, "ALIGNMENT"}, \ + {6, "PROGRAM"}, \ + {7, "FP_UNAVAIL"}, \ + {8, "SYSCALL"}, \ + {9, "AP_UNAVAIL"}, \ + {10, "DECREMENTER"}, \ + {11, "FIT"}, \ + {12, "WATCHDOG"}, \ + {13, "DTLB_MISS"}, \ + {14, "ITLB_MISS"}, \ + {15, "DEBUG"}, \ + {32, "SPE_UNAVAIL"}, \ + {33, "SPE_FP_DATA"}, \ + {34, "SPE_FP_ROUND"}, \ + {35, "PERFORMANCE_MONITOR"}, \ + {36, "DOORBELL"}, \ + {37, "DOORBELL_CRITICAL"}, \ + {38, "GUEST_DBELL"}, \ + {39, "GUEST_DBELL_CRIT"}, \ + {40, "HV_SYSCALL"}, \ + {41, "HV_PRIV"} +#endif + +TRACE_EVENT(kvm_exit, + TP_PROTO(unsigned int exit_nr, struct kvm_vcpu *vcpu), + TP_ARGS(exit_nr, vcpu), + + TP_STRUCT__entry( + __field( unsigned int, exit_nr ) + __field( unsigned long, pc ) + __field( unsigned long, msr ) + __field( unsigned long, dar ) +#ifdef CONFIG_KVM_BOOK3S_PR + __field( unsigned long, srr1 ) +#endif + __field( unsigned long, last_inst ) + ), + + TP_fast_assign( +#ifdef CONFIG_KVM_BOOK3S_PR + struct kvmppc_book3s_shadow_vcpu *svcpu; +#endif + __entry->exit_nr = exit_nr; + __entry->pc = kvmppc_get_pc(vcpu); + __entry->dar = kvmppc_get_fault_dar(vcpu); + __entry->msr = vcpu->arch.shared->msr; +#ifdef CONFIG_KVM_BOOK3S_PR + svcpu = svcpu_get(vcpu); + __entry->srr1 = svcpu->shadow_srr1; + svcpu_put(svcpu); +#endif + __entry->last_inst = vcpu->arch.last_inst; + ), + + TP_printk("exit=%s" + " | pc=0x%lx" + " | msr=0x%lx" + " | dar=0x%lx" +#ifdef CONFIG_KVM_BOOK3S_PR + " | srr1=0x%lx" +#endif + " | last_inst=0x%lx" + , + __print_symbolic(__entry->exit_nr, kvm_trace_symbol_exit), + __entry->pc, + __entry->msr, + __entry->dar, +#ifdef CONFIG_KVM_BOOK3S_PR + __entry->srr1, +#endif + __entry->last_inst + ) +); + +TRACE_EVENT(kvm_unmap_hva, + TP_PROTO(unsigned long hva), + TP_ARGS(hva), + + TP_STRUCT__entry( + __field( unsigned long, hva ) + ), + + TP_fast_assign( + __entry->hva = hva; + ), + + TP_printk("unmap hva 0x%lx\n", __entry->hva) +); + TRACE_EVENT(kvm_stlb_inval, TP_PROTO(unsigned int stlb_index), TP_ARGS(stlb_index), @@ -98,41 +218,31 @@ TRACE_EVENT(kvm_gtlb_write, __entry->word1, __entry->word2) ); - -/************************************************************************* - * Book3S trace points * - *************************************************************************/ - -#ifdef CONFIG_KVM_BOOK3S_PR - -TRACE_EVENT(kvm_book3s_exit, - TP_PROTO(unsigned int exit_nr, struct kvm_vcpu *vcpu), - TP_ARGS(exit_nr, vcpu), +TRACE_EVENT(kvm_check_requests, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu), TP_STRUCT__entry( - __field( unsigned int, exit_nr ) - __field( unsigned long, pc ) - __field( unsigned long, msr ) - __field( unsigned long, dar ) - __field( unsigned long, srr1 ) + __field( __u32, cpu_nr ) + __field( __u32, requests ) ), TP_fast_assign( - struct kvmppc_book3s_shadow_vcpu *svcpu; - __entry->exit_nr = exit_nr; - __entry->pc = kvmppc_get_pc(vcpu); - __entry->dar = kvmppc_get_fault_dar(vcpu); - __entry->msr = vcpu->arch.shared->msr; - svcpu = svcpu_get(vcpu); - __entry->srr1 = svcpu->shadow_srr1; - svcpu_put(svcpu); + __entry->cpu_nr = vcpu->vcpu_id; + __entry->requests = vcpu->requests; ), - TP_printk("exit=0x%x | pc=0x%lx | msr=0x%lx | dar=0x%lx | srr1=0x%lx", - __entry->exit_nr, __entry->pc, __entry->msr, __entry->dar, - __entry->srr1) + TP_printk("vcpu=%x requests=%x", + __entry->cpu_nr, __entry->requests) ); + +/************************************************************************* + * Book3S trace points * + *************************************************************************/ + +#ifdef CONFIG_KVM_BOOK3S_PR + TRACE_EVENT(kvm_book3s_reenter, TP_PROTO(int r, struct kvm_vcpu *vcpu), TP_ARGS(r, vcpu), @@ -395,6 +505,44 @@ TRACE_EVENT(kvm_booke206_gtlb_write, __entry->mas2, __entry->mas7_3) ); +TRACE_EVENT(kvm_booke206_ref_release, + TP_PROTO(__u64 pfn, __u32 flags), + TP_ARGS(pfn, flags), + + TP_STRUCT__entry( + __field( __u64, pfn ) + __field( __u32, flags ) + ), + + TP_fast_assign( + __entry->pfn = pfn; + __entry->flags = flags; + ), + + TP_printk("pfn=%llx flags=%x", + __entry->pfn, __entry->flags) +); + +TRACE_EVENT(kvm_booke_queue_irqprio, + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int priority), + TP_ARGS(vcpu, priority), + + TP_STRUCT__entry( + __field( __u32, cpu_nr ) + __field( __u32, priority ) + __field( unsigned long, pending ) + ), + + TP_fast_assign( + __entry->cpu_nr = vcpu->vcpu_id; + __entry->priority = priority; + __entry->pending = vcpu->arch.pending_exceptions; + ), + + TP_printk("vcpu=%x prio=%x pending=%lx", + __entry->cpu_nr, __entry->priority, __entry->pending) +); + #endif #endif /* _TRACE_KVM_H */ diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig index e7a896acd98..48a920d5148 100644 --- a/arch/powerpc/platforms/Kconfig +++ b/arch/powerpc/platforms/Kconfig @@ -90,6 +90,7 @@ config MPIC config PPC_EPAPR_HV_PIC bool default n + select EPAPR_PARAVIRT config MPIC_WEIRD bool diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c index 51ffafae561..63c5f04ea58 100644 --- a/arch/powerpc/sysdev/fsl_msi.c +++ b/arch/powerpc/sysdev/fsl_msi.c @@ -236,7 +236,6 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc) u32 intr_index; u32 have_shift = 0; struct fsl_msi_cascade_data *cascade_data; - unsigned int ret; cascade_data = irq_get_handler_data(irq); msi_data = cascade_data->msi_data; @@ -268,7 +267,9 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc) case FSL_PIC_IP_IPIC: msir_value = fsl_msi_read(msi_data->msi_regs, msir_index * 0x4); break; - case FSL_PIC_IP_VMPIC: +#ifdef CONFIG_EPAPR_PARAVIRT + case FSL_PIC_IP_VMPIC: { + unsigned int ret; ret = fh_vmpic_get_msir(virq_to_hw(irq), &msir_value); if (ret) { pr_err("fsl-msi: fh_vmpic_get_msir() failed for " @@ -277,6 +278,8 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc) } break; } +#endif + } while (msir_value) { intr_index = ffs(msir_value) - 1; @@ -508,10 +511,12 @@ static const struct of_device_id fsl_of_msi_ids[] = { .compatible = "fsl,ipic-msi", .data = &ipic_msi_feature, }, +#ifdef CONFIG_EPAPR_PARAVIRT { .compatible = "fsl,vmpic-msi", .data = &vmpic_msi_feature, }, +#endif {} }; diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c index c449dbd1c93..97118dc3d28 100644 --- a/arch/powerpc/sysdev/fsl_soc.c +++ b/arch/powerpc/sysdev/fsl_soc.c @@ -253,6 +253,7 @@ struct platform_diu_data_ops diu_ops; EXPORT_SYMBOL(diu_ops); #endif +#ifdef CONFIG_EPAPR_PARAVIRT /* * Restart the current partition * @@ -278,3 +279,4 @@ void fsl_hv_halt(void) pr_info("hv exit\n"); fh_partition_stop(-1); } +#endif diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index ff1e2f8ef94..c30615e605a 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -629,10 +629,27 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, break; case KVM_S390_SIGP_STOP: case KVM_S390_RESTART: + VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); + inti->type = s390int->type; + break; case KVM_S390_INT_EXTERNAL_CALL: + if (s390int->parm & 0xffff0000) { + kfree(inti); + return -EINVAL; + } + VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u", + s390int->parm); + inti->type = s390int->type; + inti->extcall.code = s390int->parm; + break; case KVM_S390_INT_EMERGENCY: - VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); + if (s390int->parm & 0xffff0000) { + kfree(inti); + return -EINVAL; + } + VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm); inti->type = s390int->type; + inti->emerg.code = s390int->parm; break; case KVM_S390_INT_VIRTIO: case KVM_S390_INT_SERVICE: diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index ecced9d1898..38883f0bf27 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -997,7 +997,7 @@ static int __init kvm_s390_init(void) } memcpy(facilities, S390_lowcore.stfle_fac_list, 16); facilities[0] &= 0xff00fff3f47c0000ULL; - facilities[1] &= 0x201c000000000000ULL; + facilities[1] &= 0x001c000000000000ULL; return 0; } diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 6f85fe0bf95..aabb1289ff0 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2505,6 +2505,14 @@ static void nonpaging_new_cr3(struct kvm_vcpu *vcpu) mmu_free_roots(vcpu); } +static bool is_rsvd_bits_set(struct kvm_mmu *mmu, u64 gpte, int level) +{ + int bit7; + + bit7 = (gpte >> 7) & 1; + return (gpte & mmu->rsvd_bits_mask[bit7][level-1]) != 0; +} + static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, bool no_dirty_log) { @@ -2517,6 +2525,26 @@ static pfn_t pte_prefetch_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, return gfn_to_pfn_memslot_atomic(slot, gfn); } +static bool prefetch_invalid_gpte(struct kvm_vcpu *vcpu, + struct kvm_mmu_page *sp, u64 *spte, + u64 gpte) +{ + if (is_rsvd_bits_set(&vcpu->arch.mmu, gpte, PT_PAGE_TABLE_LEVEL)) + goto no_present; + + if (!is_present_gpte(gpte)) + goto no_present; + + if (!(gpte & PT_ACCESSED_MASK)) + goto no_present; + + return false; + +no_present: + drop_spte(vcpu->kvm, spte); + return true; +} + static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, u64 *start, u64 *end) @@ -2699,11 +2727,6 @@ static void transparent_hugepage_adjust(struct kvm_vcpu *vcpu, } } -static bool mmu_invalid_pfn(pfn_t pfn) -{ - return unlikely(is_invalid_pfn(pfn)); -} - static bool handle_abnormal_pfn(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn, pfn_t pfn, unsigned access, int *ret_val) { @@ -2862,7 +2885,7 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, u32 error_code, return r; spin_lock(&vcpu->kvm->mmu_lock); - if (mmu_notifier_retry(vcpu, mmu_seq)) + if (mmu_notifier_retry(vcpu->kvm, mmu_seq)) goto out_unlock; kvm_mmu_free_some_pages(vcpu); if (likely(!force_pt_level)) @@ -3331,7 +3354,7 @@ static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code, return r; spin_lock(&vcpu->kvm->mmu_lock); - if (mmu_notifier_retry(vcpu, mmu_seq)) + if (mmu_notifier_retry(vcpu->kvm, mmu_seq)) goto out_unlock; kvm_mmu_free_some_pages(vcpu); if (likely(!force_pt_level)) @@ -3399,14 +3422,6 @@ static void paging_free(struct kvm_vcpu *vcpu) nonpaging_free(vcpu); } -static bool is_rsvd_bits_set(struct kvm_mmu *mmu, u64 gpte, int level) -{ - int bit7; - - bit7 = (gpte >> 7) & 1; - return (gpte & mmu->rsvd_bits_mask[bit7][level-1]) != 0; -} - static inline void protect_clean_gpte(unsigned *access, unsigned gpte) { unsigned mask; diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 714e2c01a6f..d17decaf1db 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -305,51 +305,43 @@ static int FNAME(walk_addr_nested)(struct guest_walker *walker, addr, access); } -static bool FNAME(prefetch_invalid_gpte)(struct kvm_vcpu *vcpu, - struct kvm_mmu_page *sp, u64 *spte, - pt_element_t gpte) +static bool +FNAME(prefetch_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, + u64 *spte, pt_element_t gpte, bool no_dirty_log) { - if (is_rsvd_bits_set(&vcpu->arch.mmu, gpte, PT_PAGE_TABLE_LEVEL)) - goto no_present; - - if (!is_present_gpte(gpte)) - goto no_present; - - if (!(gpte & PT_ACCESSED_MASK)) - goto no_present; - - return false; - -no_present: - drop_spte(vcpu->kvm, spte); - return true; -} - -static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, - u64 *spte, const void *pte) -{ - pt_element_t gpte; unsigned pte_access; + gfn_t gfn; pfn_t pfn; - gpte = *(const pt_element_t *)pte; - if (FNAME(prefetch_invalid_gpte)(vcpu, sp, spte, gpte)) - return; + if (prefetch_invalid_gpte(vcpu, sp, spte, gpte)) + return false; pgprintk("%s: gpte %llx spte %p\n", __func__, (u64)gpte, spte); + + gfn = gpte_to_gfn(gpte); pte_access = sp->role.access & gpte_access(vcpu, gpte); protect_clean_gpte(&pte_access, gpte); - pfn = gfn_to_pfn_atomic(vcpu->kvm, gpte_to_gfn(gpte)); - if (mmu_invalid_pfn(pfn)) - return; + pfn = pte_prefetch_gfn_to_pfn(vcpu, gfn, + no_dirty_log && (pte_access & ACC_WRITE_MASK)); + if (is_invalid_pfn(pfn)) + return false; /* - * we call mmu_set_spte() with host_writable = true because that - * vcpu->arch.update_pte.pfn was fetched from get_user_pages(write = 1). + * we call mmu_set_spte() with host_writable = true because + * pte_prefetch_gfn_to_pfn always gets a writable pfn. */ mmu_set_spte(vcpu, spte, sp->role.access, pte_access, 0, 0, - NULL, PT_PAGE_TABLE_LEVEL, - gpte_to_gfn(gpte), pfn, true, true); + NULL, PT_PAGE_TABLE_LEVEL, gfn, pfn, true, true); + + return true; +} + +static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, + u64 *spte, const void *pte) +{ + pt_element_t gpte = *(const pt_element_t *)pte; + + FNAME(prefetch_gpte)(vcpu, sp, spte, gpte, false); } static bool FNAME(gpte_changed)(struct kvm_vcpu *vcpu, @@ -395,53 +387,34 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw, spte = sp->spt + i; for (i = 0; i < PTE_PREFETCH_NUM; i++, spte++) { - pt_element_t gpte; - unsigned pte_access; - gfn_t gfn; - pfn_t pfn; - if (spte == sptep) continue; if (is_shadow_present_pte(*spte)) continue; - gpte = gptep[i]; - - if (FNAME(prefetch_invalid_gpte)(vcpu, sp, spte, gpte)) - continue; - - pte_access = sp->role.access & gpte_access(vcpu, gpte); - protect_clean_gpte(&pte_access, gpte); - gfn = gpte_to_gfn(gpte); - pfn = pte_prefetch_gfn_to_pfn(vcpu, gfn, - pte_access & ACC_WRITE_MASK); - if (mmu_invalid_pfn(pfn)) + if (!FNAME(prefetch_gpte)(vcpu, sp, spte, gptep[i], true)) break; - - mmu_set_spte(vcpu, spte, sp->role.access, pte_access, 0, 0, - NULL, PT_PAGE_TABLE_LEVEL, gfn, - pfn, true, true); } } /* * Fetch a shadow pte for a specific level in the paging hierarchy. + * If the guest tries to write a write-protected page, we need to + * emulate this operation, return 1 to indicate this case. */ -static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, +static int FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, struct guest_walker *gw, int user_fault, int write_fault, int hlevel, - int *emulate, pfn_t pfn, bool map_writable, - bool prefault) + pfn_t pfn, bool map_writable, bool prefault) { - unsigned access = gw->pt_access; struct kvm_mmu_page *sp = NULL; - int top_level; - unsigned direct_access; struct kvm_shadow_walk_iterator it; + unsigned direct_access, access = gw->pt_access; + int top_level, emulate = 0; if (!is_present_gpte(gw->ptes[gw->level - 1])) - return NULL; + return 0; direct_access = gw->pte_access; @@ -505,17 +478,17 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, clear_sp_write_flooding_count(it.sptep); mmu_set_spte(vcpu, it.sptep, access, gw->pte_access, - user_fault, write_fault, emulate, it.level, + user_fault, write_fault, &emulate, it.level, gw->gfn, pfn, prefault, map_writable); FNAME(pte_prefetch)(vcpu, gw, it.sptep); - return it.sptep; + return emulate; out_gpte_changed: if (sp) kvm_mmu_put_page(sp, it.sptep); kvm_release_pfn_clean(pfn); - return NULL; + return 0; } /* @@ -538,8 +511,6 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code, int write_fault = error_code & PFERR_WRITE_MASK; int user_fault = error_code & PFERR_USER_MASK; struct guest_walker walker; - u64 *sptep; - int emulate = 0; int r; pfn_t pfn; int level = PT_PAGE_TABLE_LEVEL; @@ -594,24 +565,20 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code, return r; spin_lock(&vcpu->kvm->mmu_lock); - if (mmu_notifier_retry(vcpu, mmu_seq)) + if (mmu_notifier_retry(vcpu->kvm, mmu_seq)) goto out_unlock; kvm_mmu_audit(vcpu, AUDIT_PRE_PAGE_FAULT); kvm_mmu_free_some_pages(vcpu); if (!force_pt_level) transparent_hugepage_adjust(vcpu, &walker.gfn, &pfn, &level); - sptep = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault, - level, &emulate, pfn, map_writable, prefault); - (void)sptep; - pgprintk("%s: shadow pte %p %llx emulate %d\n", __func__, - sptep, *sptep, emulate); - + r = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault, + level, pfn, map_writable, prefault); ++vcpu->stat.pf_fixed; kvm_mmu_audit(vcpu, AUDIT_POST_PAGE_FAULT); spin_unlock(&vcpu->kvm->mmu_lock); - return emulate; + return r; out_unlock: spin_unlock(&vcpu->kvm->mmu_lock); @@ -757,7 +724,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) sizeof(pt_element_t))) return -EINVAL; - if (FNAME(prefetch_invalid_gpte)(vcpu, sp, &sp->spt[i], gpte)) { + if (prefetch_invalid_gpte(vcpu, sp, &sp->spt[i], gpte)) { vcpu->kvm->tlbs_dirty++; continue; } diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d017df3899e..e93908fabf4 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -630,15 +630,12 @@ static int svm_hardware_enable(void *garbage) return -EBUSY; if (!has_svm()) { - printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n", - me); + pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me); return -EINVAL; } sd = per_cpu(svm_data, me); - if (!sd) { - printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n", - me); + pr_err("%s: svm_data is NULL on %d\n", __func__, me); return -EINVAL; } diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ad6b1dd06f8..6599e45f73f 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4287,16 +4287,6 @@ static int handle_exception(struct kvm_vcpu *vcpu) if (is_machine_check(intr_info)) return handle_machine_check(vcpu); - if ((vect_info & VECTORING_INFO_VALID_MASK) && - !is_page_fault(intr_info)) { - vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; - vcpu->run->internal.ndata = 2; - vcpu->run->internal.data[0] = vect_info; - vcpu->run->internal.data[1] = intr_info; - return 0; - } - if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) return 1; /* already handled by vmx_vcpu_run() */ @@ -4315,6 +4305,22 @@ static int handle_exception(struct kvm_vcpu *vcpu) error_code = 0; if (intr_info & INTR_INFO_DELIVER_CODE_MASK) error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); + + /* + * The #PF with PFEC.RSVD = 1 indicates the guest is accessing + * MMIO, it is better to report an internal error. + * See the comments in vmx_handle_exit. + */ + if ((vect_info & VECTORING_INFO_VALID_MASK) && + !(is_page_fault(intr_info) && !(error_code & PFERR_RSVD_MASK))) { + vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; + vcpu->run->internal.ndata = 2; + vcpu->run->internal.data[0] = vect_info; + vcpu->run->internal.data[1] = intr_info; + return 0; + } + if (is_page_fault(intr_info)) { /* EPT won't cause page fault directly */ BUG_ON(enable_ept); @@ -5979,13 +5985,24 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu) return 0; } + /* + * Note: + * Do not try to fix EXIT_REASON_EPT_MISCONFIG if it caused by + * delivery event since it indicates guest is accessing MMIO. + * The vm-exit can be triggered again after return to guest that + * will cause infinite loop. + */ if ((vectoring_info & VECTORING_INFO_VALID_MASK) && (exit_reason != EXIT_REASON_EXCEPTION_NMI && exit_reason != EXIT_REASON_EPT_VIOLATION && - exit_reason != EXIT_REASON_TASK_SWITCH)) - printk(KERN_WARNING "%s: unexpected, valid vectoring info " - "(0x%x) and exit reason is 0x%x\n", - __func__, vectoring_info, exit_reason); + exit_reason != EXIT_REASON_TASK_SWITCH)) { + vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV; + vcpu->run->internal.ndata = 2; + vcpu->run->internal.data[0] = vectoring_info; + vcpu->run->internal.data[1] = exit_reason; + return 0; + } if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked && !(is_guest_mode(vcpu) && nested_cpu_has_virtual_nmis( diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 1eefebe5d72..6e5f069bee3 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -158,7 +158,9 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { u64 __read_mostly host_xcr0; -int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); +static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt); + +static int kvm_vcpu_reset(struct kvm_vcpu *vcpu); static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu) { @@ -633,7 +635,7 @@ int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) } if (is_long_mode(vcpu)) { - if (kvm_read_cr4(vcpu) & X86_CR4_PCIDE) { + if (kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) { if (cr3 & CR3_PCID_ENABLED_RESERVED_BITS) return 1; } else @@ -5066,7 +5068,7 @@ out: } EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); -int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) +static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt) { struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt); char instruction[3]; @@ -5426,7 +5428,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) pr_debug("vcpu %d received sipi with vector # %x\n", vcpu->vcpu_id, vcpu->arch.sipi_vector); kvm_lapic_reset(vcpu); - r = kvm_arch_vcpu_reset(vcpu); + r = kvm_vcpu_reset(vcpu); if (r) return r; vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; @@ -6036,7 +6038,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) r = vcpu_load(vcpu); if (r) return r; - r = kvm_arch_vcpu_reset(vcpu); + r = kvm_vcpu_reset(vcpu); if (r == 0) r = kvm_mmu_setup(vcpu); vcpu_put(vcpu); @@ -6058,7 +6060,7 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) kvm_x86_ops->vcpu_free(vcpu); } -int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) +static int kvm_vcpu_reset(struct kvm_vcpu *vcpu) { atomic_set(&vcpu->arch.nmi_queued, 0); vcpu->arch.nmi_pending = 0; |