linux-kernel - [FYI PATCH 18/20] KVM: nVMX: emulate the INVVPID instruction

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Message-Id: <1443436745-38086-19-git-send-email-pbonzini@redhat.com>
Date:	Mon, 28 Sep 2015 12:39:03 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:	bsd@...hat.com, Wanpeng Li <wanpeng.li@...mail.com>
Subject: [FYI PATCH 18/20] KVM: nVMX: emulate the INVVPID instruction

From: Wanpeng Li <wanpeng.li@...mail.com>

Add the INVVPID instruction emulation.

Reviewed-by: Wincy Van <fanwenyi0529@...il.com>
Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/include/asm/vmx.h |  1 +
 arch/x86/kvm/vmx.c         | 23 ++++++++++++++++++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 448b7ca61aee..53c9567a29d1 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -397,6 +397,7 @@ enum vmcs_field {
 #define IDENTITY_PAGETABLE_PRIVATE_MEMSLOT	(KVM_USER_MEM_SLOTS + 2)
 
 #define VMX_NR_VPIDS				(1 << 16)
+#define VMX_VPID_EXTENT_INDIVIDUAL_ADDR 	0
 #define VMX_VPID_EXTENT_SINGLE_CONTEXT		1
 #define VMX_VPID_EXTENT_ALL_CONTEXT		2
 
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index e1cb4aa026a2..bb7ae30caa13 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7186,7 +7186,28 @@ static int handle_invept(struct kvm_vcpu *vcpu)
 
 static int handle_invvpid(struct kvm_vcpu *vcpu)
 {
-	kvm_queue_exception(vcpu, UD_VECTOR);
+	u32 vmx_instruction_info;
+	unsigned long type;
+
+	if (!nested_vmx_check_permission(vcpu))
+		return 1;
+
+	vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
+	type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf);
+
+	switch (type) {
+	case VMX_VPID_EXTENT_INDIVIDUAL_ADDR:
+	case VMX_VPID_EXTENT_SINGLE_CONTEXT:
+	case VMX_VPID_EXTENT_ALL_CONTEXT:
+		vmx_flush_tlb(vcpu);
+		nested_vmx_succeed(vcpu);
+		break;
+	default:
+		nested_vmx_failInvalid(vcpu);
+		break;
+	}
+
+	skip_emulated_instruction(vcpu);
 	return 1;
 }
 
-- 
1.8.3.1


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