Messages in this thread Patch in this message | | | Date | Wed, 12 Dec 2007 22:52:14 -0800 | From | Greg KH <> | Subject | [patch 26/60] KVM: VMX: Reset mmu context when entering real mode |
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2.6.23-stable review patch. If anyone has any objections, please let us know.
------------------ From: Eddie Dong <eddie.dong@intel.com>
patch 8668a3c468ed55d19514117a5a959d91d3d03823 in mainline.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/kvm/mmu.c | 1 + drivers/kvm/vmx.c | 1 + 2 files changed, 2 insertions(+)
--- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -1066,6 +1066,7 @@ int kvm_mmu_reset_context(struct kvm_vcp destroy_kvm_mmu(vcpu); return init_kvm_mmu(vcpu); } +EXPORT_SYMBOL_GPL(kvm_mmu_reset_context); int kvm_mmu_load(struct kvm_vcpu *vcpu) { --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -957,6 +957,7 @@ static void enter_rmode(struct kvm_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); } --
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