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Commit 8668a3c4 authored by Eddie Dong's avatar Eddie Dong Committed by Avi Kivity
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KVM: VMX: Reset mmu context when entering real mode 



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: default avatarYaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: default avatarQing He <qing.he@intel.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent 1b6269db

drivers/kvm/mmu.c

+1 −0
Original line number Diff line number Diff line
@@ -1049,6 +1049,7 @@ int kvm_mmu_reset_context(struct kvm_vcpu *vcpu) 
	destroy_kvm_mmu(vcpu);

	return init_kvm_mmu(vcpu);

}

EXPORT_SYMBOL_GPL(kvm_mmu_reset_context);



int kvm_mmu_load(struct kvm_vcpu *vcpu)

{

drivers/kvm/vmx.c

+1 −0
Original line number Diff line number Diff line
@@ -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_FS, &vcpu->rmode.fs);



	kvm_mmu_reset_context(vcpu);

	init_rmode_tss(vcpu->kvm);

}