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KVM: SVM: Handle MCEs early in the vmexit process

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This patch moves handling of the MC vmexits to an earlier
point in the vmexit. The handle_exit function is too late
because the vcpu might alreadry have changed its physical
cpu.

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Joerg Roedel
2010-05-17 14:43:34 +02:00
committed by Avi Kivity
parent a06cdb5676
commit fe5913e4e1
1 changed files with 14 additions and 1 deletions
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15
arch/x86/kvm/svm.c
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@ -1410,7 +1410,7 @@ static int nm_interception(struct vcpu_svm *svm)
return 1; return 1;
} }
static int mc_interception(struct vcpu_svm *svm) static void svm_handle_mce(struct vcpu_svm *svm)
{ {
/* /*
* On an #MC intercept the MCE handler is not called automatically in * On an #MC intercept the MCE handler is not called automatically in
@ -1420,6 +1420,11 @@ static int mc_interception(struct vcpu_svm *svm)
"int $0x12\n"); "int $0x12\n");
/* not sure if we ever come back to this point */ /* not sure if we ever come back to this point */
return;
}
static int mc_interception(struct vcpu_svm *svm)
{
return 1; return 1;
} }
@ -3088,6 +3093,14 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
} }
/*
* We need to handle MC intercepts here before the vcpu has a chance to
* change the physical cpu
*/
if (unlikely(svm->vmcb->control.exit_code ==
SVM_EXIT_EXCP_BASE + MC_VECTOR))
svm_handle_mce(svm);
} }
#undef R #undef R