Messages in this thread Patch in this message | | | From | Yang Weijiang <> | Subject | [PATCH v7 14/15] KVM: x86/vmx: Flip Arch LBREn bit on guest state change | Date | Fri, 6 Aug 2021 15:42:24 +0800 |
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Clear Arch LBREn bit on #SMI and restore it on RSM per ISA spec., also clear the bit when guest does warm reset.
Signed-off-by: Yang Weijiang <weijiang.yang@intel.com> --- arch/x86/kvm/vmx/vmx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 31b9c06c9b3b..31969221db8c 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -4513,8 +4513,10 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) vmx_update_exception_bitmap(vcpu); vpid_sync_context(vmx->vpid); - if (init_event) + if (init_event) { vmx_clear_hlt(vcpu); + flip_arch_lbr_ctl(vcpu, false); + } } static void vmx_enable_irq_window(struct kvm_vcpu *vcpu) @@ -7513,6 +7515,7 @@ static int vmx_enter_smm(struct kvm_vcpu *vcpu, char *smstate) vmx->nested.smm.vmxon = vmx->nested.vmxon; vmx->nested.vmxon = false; vmx_clear_hlt(vcpu); + flip_arch_lbr_ctl(vcpu, false); return 0; } @@ -7533,6 +7536,7 @@ static int vmx_leave_smm(struct kvm_vcpu *vcpu, const char *smstate) vmx->nested.smm.guest_mode = false; } + flip_arch_lbr_ctl(vcpu, true); return 0; } -- 2.25.1
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