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KVM: VMX: Reset mmu context when entering real mode

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Resetting an SMP guest will force AP enter real mode (RESET) with
paging enabled in protected mode. While current enter_rmode() can
only handle mode switch from nonpaging mode to real mode which leads
to SMP reboot failure.

Fix by reloading the mmu context on entering real mode.

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Qing He <qing.he@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Eddie Dong 2007-10-10 14:26:45 +08:00 committed by Avi Kivity
parent 1b6269db3f
commit 8668a3c468
2 changed files with 2 additions and 0 deletions
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1
drivers/kvm/mmu.c
View file

@ -1049,6 +1049,7 @@ int kvm_mmu_reset_context(struct kvm_vcpu *vcpu)
destroy_kvm_mmu(vcpu); destroy_kvm_mmu(vcpu);
return init_kvm_mmu(vcpu); return init_kvm_mmu(vcpu);
} }
EXPORT_SYMBOL_GPL(kvm_mmu_reset_context);
int kvm_mmu_load(struct kvm_vcpu *vcpu) int kvm_mmu_load(struct kvm_vcpu *vcpu)
{ {

1
drivers/kvm/vmx.c
View file

@ -1128,6 +1128,7 @@ static void enter_rmode(struct kvm_vcpu *vcpu)
fix_rmode_seg(VCPU_SREG_GS, &vcpu->rmode.gs); fix_rmode_seg(VCPU_SREG_GS, &vcpu->rmode.gs);
fix_rmode_seg(VCPU_SREG_FS, &vcpu->rmode.fs); fix_rmode_seg(VCPU_SREG_FS, &vcpu->rmode.fs);
kvm_mmu_reset_context(vcpu);
init_rmode_tss(vcpu->kvm); init_rmode_tss(vcpu->kvm);
} }