Merge tag 'kvm-3.8-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Marcelo Tosatti:
 "Considerable KVM/PPC work, x86 kvmclock vsyscall support,
  IA32_TSC_ADJUST MSR emulation, amongst others."

Fix up trivial conflict in kernel/sched/core.c due to cross-cpu
migration notifier added next to rq migration call-back.

* tag 'kvm-3.8-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (156 commits)
  KVM: emulator: fix real mode segment checks in address linearization
  VMX: remove unneeded enable_unrestricted_guest check
  KVM: VMX: fix DPL during entry to protected mode
  x86/kexec: crash_vmclear_local_vmcss needs __rcu
  kvm: Fix irqfd resampler list walk
  KVM: VMX: provide the vmclear function and a bitmap to support VMCLEAR in kdump
  x86/kexec: VMCLEAR VMCSs loaded on all cpus if necessary
  KVM: MMU: optimize for set_spte
  KVM: PPC: booke: Get/set guest EPCR register using ONE_REG interface
  KVM: PPC: bookehv: Add EPCR support in mtspr/mfspr emulation
  KVM: PPC: bookehv: Add guest computation mode for irq delivery
  KVM: PPC: Make EPCR a valid field for booke64 and bookehv
  KVM: PPC: booke: Extend MAS2 EPN mask for 64-bit
  KVM: PPC: e500: Mask MAS2 EPN high 32-bits in 32/64 tlbwe emulation
  KVM: PPC: Mask ea's high 32-bits in 32/64 instr emulation
  KVM: PPC: e500: Add emulation helper for getting instruction ea
  KVM: PPC: bookehv64: Add support for interrupt handling
  KVM: PPC: bookehv: Remove GET_VCPU macro from exception handler
  KVM: PPC: booke: Fix get_tb() compile error on 64-bit
  KVM: PPC: e500: Silence bogus GCC warning in tlb code
  ...

1 files changed, 68 insertions, 44 deletions

diff --git a/arch/powerpc/kvm/44x_emulate.c b/arch/powerpc/kvm/44x_emulate.c
index c8c61578fdf..35ec0a8547d 100644
--- a/arch/powerpc/kvm/44x_emulate.c
+++ b/arch/powerpc/kvm/44x_emulate.c
@@ -27,12 +27,70 @@
 #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_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.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 +108,21 @@ 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: