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From: Vipin Sharma <vipinsh@google.com>
To: pbonzini@redhat.com, seanjc@google.com, jmattson@google.com
Cc: dmatlack@google.com, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, Vipin Sharma <vipinsh@google.com>
Subject: [PATCH v2 1/2] KVM: VMX: Add a wrapper to read index of GPR for INVPCID, INVVPID, and INVEPT
Date: Wed,  3 Nov 2021 18:32:31 +0000	[thread overview]
Message-ID: <20211103183232.1213761-2-vipinsh@google.com> (raw)
In-Reply-To: <20211103183232.1213761-1-vipinsh@google.com>

handle_invept(), handle_invvpid(), handle_invpcid() read the same reg2
on VM exit. Move them to a common wrapper function.

Signed-off-by: Vipin Sharma <vipinsh@google.com>
---
 arch/x86/kvm/vmx/nested.c | 10 ++++++----
 arch/x86/kvm/vmx/vmx.c    |  4 +++-
 arch/x86/kvm/vmx/vmx.h    |  5 +++++
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index b4ee5e9f9e20..f73d4e31dd99 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -5379,7 +5379,7 @@ static int handle_invept(struct kvm_vcpu *vcpu)
 	struct {
 		u64 eptp, gpa;
 	} operand;
-	int i, r;
+	int i, r, gpr_index;
 
 	if (!(vmx->nested.msrs.secondary_ctls_high &
 	      SECONDARY_EXEC_ENABLE_EPT) ||
@@ -5392,7 +5392,8 @@ static int handle_invept(struct kvm_vcpu *vcpu)
 		return 1;
 
 	vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
-	type = kvm_register_read(vcpu, (vmx_instruction_info >> 28) & 0xf);
+	gpr_index = vmx_get_instr_info_reg2(vmx_instruction_info);
+	type = kvm_register_read(vcpu, gpr_index);
 
 	types = (vmx->nested.msrs.ept_caps >> VMX_EPT_EXTENT_SHIFT) & 6;
 
@@ -5459,7 +5460,7 @@ static int handle_invvpid(struct kvm_vcpu *vcpu)
 		u64 gla;
 	} operand;
 	u16 vpid02;
-	int r;
+	int r, gpr_index;
 
 	if (!(vmx->nested.msrs.secondary_ctls_high &
 	      SECONDARY_EXEC_ENABLE_VPID) ||
@@ -5472,7 +5473,8 @@ static int handle_invvpid(struct kvm_vcpu *vcpu)
 		return 1;
 
 	vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
-	type = kvm_register_read(vcpu, (vmx_instruction_info >> 28) & 0xf);
+	gpr_index = vmx_get_instr_info_reg2(vmx_instruction_info);
+	type = kvm_register_read(vcpu, gpr_index);
 
 	types = (vmx->nested.msrs.vpid_caps &
 			VMX_VPID_EXTENT_SUPPORTED_MASK) >> 8;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 71f54d85f104..e41d207e3298 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5494,6 +5494,7 @@ static int handle_invpcid(struct kvm_vcpu *vcpu)
 		u64 pcid;
 		u64 gla;
 	} operand;
+	int gpr_index;
 
 	if (!guest_cpuid_has(vcpu, X86_FEATURE_INVPCID)) {
 		kvm_queue_exception(vcpu, UD_VECTOR);
@@ -5501,7 +5502,8 @@ static int handle_invpcid(struct kvm_vcpu *vcpu)
 	}
 
 	vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
-	type = kvm_register_read(vcpu, (vmx_instruction_info >> 28) & 0xf);
+	gpr_index = vmx_get_instr_info_reg2(vmx_instruction_info);
+	type = kvm_register_read(vcpu, gpr_index);
 
 	if (type > 3) {
 		kvm_inject_gp(vcpu, 0);
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index e7db42e3b0ce..95c9bca45cdd 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -522,4 +522,9 @@ static inline bool vmx_guest_state_valid(struct kvm_vcpu *vcpu)
 
 void dump_vmcs(struct kvm_vcpu *vcpu);
 
+static inline int vmx_get_instr_info_reg2(u32 vmx_instr_info)
+{
+	return (vmx_instr_info >> 28) & 0xf;
+}
+
 #endif /* __KVM_X86_VMX_H */
-- 
2.33.1.1089.g2158813163f-goog


  reply	other threads:[~2021-11-03 18:34 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-03 18:32 [PATCH v2 0/2] Add wrapper to read GPR of INVPCID, INVVPID, and INVEPT Vipin Sharma
2021-11-03 18:32 ` Vipin Sharma [this message]
2021-11-03 23:00   ` [PATCH v2 1/2] KVM: VMX: Add a wrapper to read index of GPR for " Sean Christopherson
2021-11-03 18:32 ` [PATCH v2 2/2] KVM: Move INVPCID type check from vmx and svm to the common kvm_handle_invpcid() Vipin Sharma
2021-11-03 20:00   ` Sean Christopherson
2021-11-03 20:23     ` Vipin Sharma

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