linux-kernel - [PATCH] KVM: nVMX: pass valid guest linear-address to the L1

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Message-Id: <1473013367-12173-1-git-send-email-jan.dakinevich@gmail.com>
Date:   Sun,  4 Sep 2016 21:22:47 +0300
From:   Jan Dakinevich <jan.dakinevich@...il.com>
To:     kvm@...r.kernel.org
Cc:     pbonzini@...hat.com, rkrcmar@...hat.com,
        linux-kernel@...r.kernel.org, ynorov@...iumnetworks.com,
        Jan Dakinevich <jan.dakinevich@...il.com>
Subject: [PATCH] KVM: nVMX: pass valid guest linear-address to the L1

If EPT support is exposed to L1 hypervisor, guest linear-address field
of VMCS should contain GVA of L2, the access to which caused EPT violation.

Signed-off-by: Jan Dakinevich <jan.dakinevich@...il.com>
---
 arch/x86/kvm/vmx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 5cede40..a4bb2bd 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -10500,6 +10500,9 @@ static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
 		vmcs12->guest_pdptr3 = vmcs_read64(GUEST_PDPTR3);
 	}
 
+	if (nested_cpu_has_ept(vmcs12))
+		vmcs12->guest_linear_address = vmcs_readl(GUEST_LINEAR_ADDRESS);
+
 	if (nested_cpu_has_vid(vmcs12))
 		vmcs12->guest_intr_status = vmcs_read16(GUEST_INTR_STATUS);
 
-- 
1.9.1