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| author | Nadav Amit <namit@cs.technion.ac.il> | 2015-01-26 08:32:23 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-01-26 12:14:42 +0100 |
| commit | 801806d956c2c198b9fdd3afd156a536f9a3a139 (patch) | |
| tree | 97b84cd9422ab2b452c2e5a29fbc1672054d2d4a /arch | |
| parent | KVM: x86: Wrong operand size for far ret (diff) | |
| download | linux-801806d956c2c198b9fdd3afd156a536f9a3a139.tar.xz linux-801806d956c2c198b9fdd3afd156a536f9a3a139.zip | |
KVM: x86: IRET emulation does not clear NMI masking
The IRET instruction should clear NMI masking, but the current implementation
does not do so.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/kvm_emulate.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/emulate.c | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
3 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index eb181178fe0b..57a9d94fe160 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -208,6 +208,7 @@ struct x86_emulate_ops { void (*get_cpuid)(struct x86_emulate_ctxt *ctxt, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx); + void (*set_nmi_mask)(struct x86_emulate_ctxt *ctxt, bool masked); }; typedef u32 __attribute__((vector_size(16))) sse128_t; diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index dd7100481aac..fa3ca55a50c6 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2047,6 +2047,7 @@ static int emulate_iret_real(struct x86_emulate_ctxt *ctxt) ctxt->eflags &= ~EFLG_RESERVED_ZEROS_MASK; /* Clear reserved zeros */ ctxt->eflags |= EFLG_RESERVED_ONE_MASK; + ctxt->ops->set_nmi_mask(ctxt, false); return rc; } diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index afa0815bd384..cdd6606e4c54 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4963,6 +4963,11 @@ static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulon kvm_register_write(emul_to_vcpu(ctxt), reg, val); } +static void emulator_set_nmi_mask(struct x86_emulate_ctxt *ctxt, bool masked) +{ + kvm_x86_ops->set_nmi_mask(emul_to_vcpu(ctxt), masked); +} + static const struct x86_emulate_ops emulate_ops = { .read_gpr = emulator_read_gpr, .write_gpr = emulator_write_gpr, @@ -4998,6 +5003,7 @@ static const struct x86_emulate_ops emulate_ops = { .put_fpu = emulator_put_fpu, .intercept = emulator_intercept, .get_cpuid = emulator_get_cpuid, + .set_nmi_mask = emulator_set_nmi_mask, }; static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask) |