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Message-ID: <BLU437-SMTP23899BC8258756A9326950802B0@phx.gbl> Date: Tue, 3 Nov 2015 19:40:20 +0800 From: Wanpeng Li <wanpeng.li@...mail.com> To: Paolo Bonzini <pbonzini@...hat.com> CC: Nadav Amit <nadav.amit@...il.com>, kvm@...r.kernel.org, linux-kernel@...r.kernel.org, Wanpeng Li <wanpeng.li@...mail.com> Subject: [PATCH v2] KVM: x86: Reset RFLAGS state following processor init/reset Reference SDM Volume 1 3.4.3: Following initialization of the processor (either by asserting the RESET pin or the INIT pin), the state of the EFLAGS register is 00000002H. However, the eflags fixed bit is not set and other bits are also not cleared during the init/reset in kvm. This patch reset eflags register to 00000002H following initialization of the processor. Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com> --- v1 -> v2: * use vmcs_writel arch/x86/kvm/vmx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index b680c2e..1a95ef7 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4935,6 +4935,7 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) vmx_set_efer(vcpu, 0); vmx_fpu_activate(vcpu); update_exception_bitmap(vcpu); + vmcs_writel(GUEST_RFLAGS, X86_EFLAGS_FIXED); vpid_sync_context(vmx->vpid); } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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