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-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/crypto/crc32c-pcl-intel-asm_64.S5
-rw-r--r--arch/x86/include/asm/syscalls.h4
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel.c13
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel_lbr.c27
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel_uncore.c17
-rw-r--r--arch/x86/kernel/head64.c3
-rw-r--r--arch/x86/kernel/head_64.S1
-rw-r--r--arch/x86/kernel/irq.c4
-rw-r--r--arch/x86/kernel/microcode_intel_early.c5
-rw-r--r--arch/x86/kernel/vm86_32.c11
-rw-r--r--arch/x86/kvm/emulate.c46
-rw-r--r--arch/x86/kvm/vmx.c6
-rw-r--r--arch/x86/xen/enlighten.c20
-rw-r--r--arch/x86/xen/smp.c2
-rw-r--r--arch/x86/xen/time.c6
16 files changed, 134 insertions, 37 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 15b5cef4aa3..6ef2a378e3a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -107,7 +107,6 @@ config X86
select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC)
select GENERIC_TIME_VSYSCALL if X86_64
select KTIME_SCALAR if X86_32
- select ALWAYS_USE_PERSISTENT_CLOCK
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select HAVE_CONTEXT_TRACKING if X86_64
diff --git a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
index cf1a7ec4cc3..a59c64311d4 100644
--- a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
+++ b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
@@ -42,6 +42,7 @@
* SOFTWARE.
*/
+#include <asm/inst.h>
#include <linux/linkage.h>
## ISCSI CRC 32 Implementation with crc32 and pclmulqdq Instruction
@@ -225,10 +226,10 @@ LABEL crc_ %i
movdqa (bufp), %xmm0 # 2 consts: K1:K2
movq crc_init, %xmm1 # CRC for block 1
- pclmulqdq $0x00,%xmm0,%xmm1 # Multiply by K2
+ PCLMULQDQ 0x00,%xmm0,%xmm1 # Multiply by K2
movq crc1, %xmm2 # CRC for block 2
- pclmulqdq $0x10, %xmm0, %xmm2 # Multiply by K1
+ PCLMULQDQ 0x10, %xmm0, %xmm2 # Multiply by K1
pxor %xmm2,%xmm1
movq %xmm1, %rax
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 6cf0a9cc60c..5a0be0af46c 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -37,8 +37,8 @@ asmlinkage int sys_get_thread_area(struct user_desc __user *);
unsigned long sys_sigreturn(void);
/* kernel/vm86_32.c */
-int sys_vm86old(struct vm86_struct __user *);
-int sys_vm86(unsigned long, unsigned long);
+asmlinkage long sys_vm86old(struct vm86_struct __user *);
+asmlinkage long sys_vm86(unsigned long, unsigned long);
#else /* CONFIG_X86_32 */
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index cc45deb791b..4a0a462d5e9 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -125,10 +125,15 @@ static struct event_constraint intel_ivb_event_constraints[] __read_mostly =
INTEL_UEVENT_CONSTRAINT(0x08a3, 0x4), /* CYCLE_ACTIVITY.CYCLES_L1D_PENDING */
INTEL_UEVENT_CONSTRAINT(0x0ca3, 0x4), /* CYCLE_ACTIVITY.STALLS_L1D_PENDING */
INTEL_UEVENT_CONSTRAINT(0x01c0, 0x2), /* INST_RETIRED.PREC_DIST */
- INTEL_EVENT_CONSTRAINT(0xd0, 0xf), /* MEM_UOPS_RETIRED.* */
- INTEL_EVENT_CONSTRAINT(0xd1, 0xf), /* MEM_LOAD_UOPS_RETIRED.* */
- INTEL_EVENT_CONSTRAINT(0xd2, 0xf), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
- INTEL_EVENT_CONSTRAINT(0xd3, 0xf), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
+ /*
+ * Errata BV98 -- MEM_*_RETIRED events can leak between counters of SMT
+ * siblings; disable these events because they can corrupt unrelated
+ * counters.
+ */
+ INTEL_EVENT_CONSTRAINT(0xd0, 0x0), /* MEM_UOPS_RETIRED.* */
+ INTEL_EVENT_CONSTRAINT(0xd1, 0x0), /* MEM_LOAD_UOPS_RETIRED.* */
+ INTEL_EVENT_CONSTRAINT(0xd2, 0x0), /* MEM_LOAD_UOPS_LLC_HIT_RETIRED.* */
+ INTEL_EVENT_CONSTRAINT(0xd3, 0x0), /* MEM_LOAD_UOPS_LLC_MISS_RETIRED.* */
EVENT_CONSTRAINT_END
};
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index da02e9cc375..d978353c939 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -310,7 +310,7 @@ void intel_pmu_lbr_read(void)
* - in case there is no HW filter
* - in case the HW filter has errata or limitations
*/
-static void intel_pmu_setup_sw_lbr_filter(struct perf_event *event)
+static int intel_pmu_setup_sw_lbr_filter(struct perf_event *event)
{
u64 br_type = event->attr.branch_sample_type;
int mask = 0;
@@ -318,8 +318,11 @@ static void intel_pmu_setup_sw_lbr_filter(struct perf_event *event)
if (br_type & PERF_SAMPLE_BRANCH_USER)
mask |= X86_BR_USER;
- if (br_type & PERF_SAMPLE_BRANCH_KERNEL)
+ if (br_type & PERF_SAMPLE_BRANCH_KERNEL) {
+ if (perf_paranoid_kernel() && !capable(CAP_SYS_ADMIN))
+ return -EACCES;
mask |= X86_BR_KERNEL;
+ }
/* we ignore BRANCH_HV here */
@@ -339,6 +342,8 @@ static void intel_pmu_setup_sw_lbr_filter(struct perf_event *event)
* be used by fixup code for some CPU
*/
event->hw.branch_reg.reg = mask;
+
+ return 0;
}
/*
@@ -386,7 +391,9 @@ int intel_pmu_setup_lbr_filter(struct perf_event *event)
/*
* setup SW LBR filter
*/
- intel_pmu_setup_sw_lbr_filter(event);
+ ret = intel_pmu_setup_sw_lbr_filter(event);
+ if (ret)
+ return ret;
/*
* setup HW LBR filter, if any
@@ -442,8 +449,18 @@ static int branch_type(unsigned long from, unsigned long to)
return X86_BR_NONE;
addr = buf;
- } else
- addr = (void *)from;
+ } else {
+ /*
+ * The LBR logs any address in the IP, even if the IP just
+ * faulted. This means userspace can control the from address.
+ * Ensure we don't blindy read any address by validating it is
+ * a known text address.
+ */
+ if (kernel_text_address(from))
+ addr = (void *)from;
+ else
+ return X86_BR_NONE;
+ }
/*
* decoder needs to know the ABI especially
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index b43200dbfe7..3e091f04487 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -2428,7 +2428,7 @@ static void __init uncore_types_exit(struct intel_uncore_type **types)
static int __init uncore_type_init(struct intel_uncore_type *type)
{
struct intel_uncore_pmu *pmus;
- struct attribute_group *events_group;
+ struct attribute_group *attr_group;
struct attribute **attrs;
int i, j;
@@ -2455,19 +2455,19 @@ static int __init uncore_type_init(struct intel_uncore_type *type)
while (type->event_descs[i].attr.attr.name)
i++;
- events_group = kzalloc(sizeof(struct attribute *) * (i + 1) +
- sizeof(*events_group), GFP_KERNEL);
- if (!events_group)
+ attr_group = kzalloc(sizeof(struct attribute *) * (i + 1) +
+ sizeof(*attr_group), GFP_KERNEL);
+ if (!attr_group)
goto fail;
- attrs = (struct attribute **)(events_group + 1);
- events_group->name = "events";
- events_group->attrs = attrs;
+ attrs = (struct attribute **)(attr_group + 1);
+ attr_group->name = "events";
+ attr_group->attrs = attrs;
for (j = 0; j < i; j++)
attrs[j] = &type->event_descs[j].attr.attr;
- type->events_group = events_group;
+ type->events_group = attr_group;
}
type->pmu_group = &uncore_pmu_attr_group;
@@ -2853,6 +2853,7 @@ static int __init uncore_cpu_init(void)
msr_uncores = nhm_msr_uncores;
break;
case 42: /* Sandy Bridge */
+ case 58: /* Ivy Bridge */
if (snb_uncore_cbox.num_boxes > max_cores)
snb_uncore_cbox.num_boxes = max_cores;
msr_uncores = snb_msr_uncores;
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index c5e403f6d86..8f3201d59b1 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -34,6 +34,7 @@
extern pgd_t early_level4_pgt[PTRS_PER_PGD];
extern pmd_t early_dynamic_pgts[EARLY_DYNAMIC_PAGE_TABLES][PTRS_PER_PMD];
static unsigned int __initdata next_early_pgt = 2;
+pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX);
/* Wipe all early page tables except for the kernel symbol map */
static void __init reset_early_page_tables(void)
@@ -99,7 +100,7 @@ again:
pmd_p[i] = 0;
*pud_p = (pudval_t)pmd_p - __START_KERNEL_map + phys_base + _KERNPG_TABLE;
}
- pmd = (physaddr & PMD_MASK) + (__PAGE_KERNEL_LARGE & ~_PAGE_GLOBAL);
+ pmd = (physaddr & PMD_MASK) + early_pmd_flags;
pmd_p[pmd_index(address)] = pmd;
return 0;
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 6859e962644..08f7e803909 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -200,6 +200,7 @@ ENTRY(secondary_startup_64)
btl $20,%edi /* No Execute supported? */
jnc 1f
btsl $_EFER_NX, %eax
+ btsq $_PAGE_BIT_NX,early_pmd_flags(%rip)
1: wrmsr /* Make changes effective */
/* Setup cr0 */
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index e4595f10591..84b778962c6 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -165,10 +165,6 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
u64 arch_irq_stat(void)
{
u64 sum = atomic_read(&irq_err_count);
-
-#ifdef CONFIG_X86_IO_APIC
- sum += atomic_read(&irq_mis_count);
-#endif
return sum;
}
diff --git a/arch/x86/kernel/microcode_intel_early.c b/arch/x86/kernel/microcode_intel_early.c
index d893e8ed8ac..2e9e12871c2 100644
--- a/arch/x86/kernel/microcode_intel_early.c
+++ b/arch/x86/kernel/microcode_intel_early.c
@@ -487,6 +487,7 @@ static inline void show_saved_mc(void)
#endif
#if defined(CONFIG_MICROCODE_INTEL_EARLY) && defined(CONFIG_HOTPLUG_CPU)
+static DEFINE_MUTEX(x86_cpu_microcode_mutex);
/*
* Save this mc into mc_saved_data. So it will be loaded early when a CPU is
* hot added or resumes.
@@ -507,7 +508,7 @@ int save_mc_for_early(u8 *mc)
* Hold hotplug lock so mc_saved_data is not accessed by a CPU in
* hotplug.
*/
- cpu_hotplug_driver_lock();
+ mutex_lock(&x86_cpu_microcode_mutex);
mc_saved_count_init = mc_saved_data.mc_saved_count;
mc_saved_count = mc_saved_data.mc_saved_count;
@@ -544,7 +545,7 @@ int save_mc_for_early(u8 *mc)
}
out:
- cpu_hotplug_driver_unlock();
+ mutex_unlock(&x86_cpu_microcode_mutex);
return ret;
}
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index 1cf5766dde1..3dbdd9c839d 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -33,6 +33,7 @@
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
+#include <linux/syscalls.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/signal.h>
@@ -48,7 +49,6 @@
#include <asm/io.h>
#include <asm/tlbflush.h>
#include <asm/irq.h>
-#include <asm/syscalls.h>
/*
* Known problems:
@@ -202,17 +202,16 @@ out:
static int do_vm86_irq_handling(int subfunction, int irqnumber);
static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk);
-int sys_vm86old(struct vm86_struct __user *v86)
+SYSCALL_DEFINE1(vm86old, struct vm86_struct __user *, v86)
{
struct kernel_vm86_struct info; /* declare this _on top_,
* this avoids wasting of stack space.
* This remains on the stack until we
* return to 32 bit user space.
*/
- struct task_struct *tsk;
+ struct task_struct *tsk = current;
int tmp, ret = -EPERM;
- tsk = current;
if (tsk->thread.saved_sp0)
goto out;
tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,
@@ -227,11 +226,12 @@ int sys_vm86old(struct vm86_struct __user *v86)
do_sys_vm86(&info, tsk);
ret = 0; /* we never return here */
out:
+ asmlinkage_protect(1, ret, v86);
return ret;
}
-int sys_vm86(unsigned long cmd, unsigned long arg)
+SYSCALL_DEFINE2(vm86, unsigned long, cmd, unsigned long, arg)
{
struct kernel_vm86_struct info; /* declare this _on top_,
* this avoids wasting of stack space.
@@ -278,6 +278,7 @@ int sys_vm86(unsigned long cmd, unsigned long arg)
do_sys_vm86(&info, tsk);
ret = 0; /* we never return here */
out:
+ asmlinkage_protect(2, ret, cmd, arg);
return ret;
}
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index a335cc6cde7..59622c9cc63 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -60,6 +60,7 @@
#define OpGS 25ull /* GS */
#define OpMem8 26ull /* 8-bit zero extended memory operand */
#define OpImm64 27ull /* Sign extended 16/32/64-bit immediate */
+#define OpXLat 28ull /* memory at BX/EBX/RBX + zero-extended AL */
#define OpBits 5 /* Width of operand field */
#define OpMask ((1ull << OpBits) - 1)
@@ -99,6 +100,7 @@
#define SrcImmUByte (OpImmUByte << SrcShift)
#define SrcImmU (OpImmU << SrcShift)
#define SrcSI (OpSI << SrcShift)
+#define SrcXLat (OpXLat << SrcShift)
#define SrcImmFAddr (OpImmFAddr << SrcShift)
#define SrcMemFAddr (OpMemFAddr << SrcShift)
#define SrcAcc (OpAcc << SrcShift)
@@ -532,6 +534,9 @@ FOP_SETCC(setle)
FOP_SETCC(setnle)
FOP_END;
+FOP_START(salc) "pushf; sbb %al, %al; popf \n\t" FOP_RET
+FOP_END;
+
#define __emulate_1op_rax_rdx(ctxt, _op, _suffix, _ex) \
do { \
unsigned long _tmp; \
@@ -2986,6 +2991,28 @@ static int em_das(struct x86_emulate_ctxt *ctxt)
return X86EMUL_CONTINUE;
}
+static int em_aam(struct x86_emulate_ctxt *ctxt)
+{
+ u8 al, ah;
+
+ if (ctxt->src.val == 0)
+ return emulate_de(ctxt);
+
+ al = ctxt->dst.val & 0xff;
+ ah = al / ctxt->src.val;
+ al %= ctxt->src.val;
+
+ ctxt->dst.val = (ctxt->dst.val & 0xffff0000) | al | (ah << 8);
+
+ /* Set PF, ZF, SF */
+ ctxt->src.type = OP_IMM;
+ ctxt->src.val = 0;
+ ctxt->src.bytes = 1;
+ fastop(ctxt, em_or);
+
+ return X86EMUL_CONTINUE;
+}
+
static int em_aad(struct x86_emulate_ctxt *ctxt)
{
u8 al = ctxt->dst.val & 0xff;
@@ -3926,7 +3953,10 @@ static const struct opcode opcode_table[256] = {
/* 0xD0 - 0xD7 */
G(Src2One | ByteOp, group2), G(Src2One, group2),
G(Src2CL | ByteOp, group2), G(Src2CL, group2),
- N, I(DstAcc | SrcImmByte | No64, em_aad), N, N,
+ I(DstAcc | SrcImmUByte | No64, em_aam),
+ I(DstAcc | SrcImmUByte | No64, em_aad),
+ F(DstAcc | ByteOp | No64, em_salc),
+ I(DstAcc | SrcXLat | ByteOp, em_mov),
/* 0xD8 - 0xDF */
N, E(0, &escape_d9), N, E(0, &escape_db), N, E(0, &escape_dd), N, N,
/* 0xE0 - 0xE7 */
@@ -4162,6 +4192,10 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
break;
case OpMem8:
ctxt->memop.bytes = 1;
+ if (ctxt->memop.type == OP_REG) {
+ ctxt->memop.addr.reg = decode_register(ctxt, ctxt->modrm_rm, 1);
+ fetch_register_operand(&ctxt->memop);
+ }
goto mem_common;
case OpMem16:
ctxt->memop.bytes = 2;
@@ -4184,6 +4218,16 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
op->val = 0;
op->count = 1;
break;
+ case OpXLat:
+ op->type = OP_MEM;
+ op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
+ op->addr.mem.ea =
+ register_address(ctxt,
+ reg_read(ctxt, VCPU_REGS_RBX) +
+ (reg_read(ctxt, VCPU_REGS_RAX) & 0xff));
+ op->addr.mem.seg = seg_override(ctxt);
+ op->val = 0;
+ break;
case OpImmFAddr:
op->type = OP_IMM;
op->addr.mem.ea = ctxt->_eip;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6667042714c..0af18077012 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -5197,6 +5197,12 @@ static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
return 0;
}
+ if (vcpu->arch.halt_request) {
+ vcpu->arch.halt_request = 0;
+ ret = kvm_emulate_halt(vcpu);
+ goto out;
+ }
+
if (signal_pending(current))
goto out;
if (need_resched())
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index c8e1c7b95c3..cf95e192d05 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -156,6 +156,21 @@ static void xen_vcpu_setup(int cpu)
BUG_ON(HYPERVISOR_shared_info == &xen_dummy_shared_info);
+ /*
+ * This path is called twice on PVHVM - first during bootup via
+ * smp_init -> xen_hvm_cpu_notify, and then if the VCPU is being
+ * hotplugged: cpu_up -> xen_hvm_cpu_notify.
+ * As we can only do the VCPUOP_register_vcpu_info once lets
+ * not over-write its result.
+ *
+ * For PV it is called during restore (xen_vcpu_restore) and bootup
+ * (xen_setup_vcpu_info_placement). The hotplug mechanism does not
+ * use this function.
+ */
+ if (xen_hvm_domain()) {
+ if (per_cpu(xen_vcpu, cpu) == &per_cpu(xen_vcpu_info, cpu))
+ return;
+ }
if (cpu < MAX_VIRT_CPUS)
per_cpu(xen_vcpu,cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
@@ -1589,8 +1604,11 @@ static int __cpuinit xen_hvm_cpu_notify(struct notifier_block *self,
switch (action) {
case CPU_UP_PREPARE:
xen_vcpu_setup(cpu);
- if (xen_have_vector_callback)
+ if (xen_have_vector_callback) {
xen_init_lock_cpu(cpu);
+ if (xen_feature(XENFEAT_hvm_safe_pvclock))
+ xen_setup_timer(cpu);
+ }
break;
default:
break;
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 09ea61d2e02..22c800af180 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -662,6 +662,8 @@ static void xen_hvm_cpu_die(unsigned int cpu)
unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
+ xen_uninit_lock_cpu(cpu);
+ xen_teardown_timer(cpu);
native_cpu_die(cpu);
}
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 0296a952250..054cc01bb84 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -497,7 +497,11 @@ static void xen_hvm_setup_cpu_clockevents(void)
{
int cpu = smp_processor_id();
xen_setup_runstate_info(cpu);
- xen_setup_timer(cpu);
+ /*
+ * xen_setup_timer(cpu) - snprintf is bad in atomic context. Hence
+ * doing it xen_hvm_cpu_notify (which gets called by smp_init during
+ * early bootup and also during CPU hotplug events).
+ */
xen_setup_cpu_clockevents();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-25 02:28:10 +0000