linux-kernel - [PATCH v2 02/10] KVM: x86: Move MSR_TYPE_{R,W,RW} values from VMX to x86, as enums

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Message-ID: <20240802181935.292540-3-seanjc@google.com>
Date: Fri,  2 Aug 2024 11:19:27 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Tom Lendacky <thomas.lendacky@....com>, Weijiang Yang <weijiang.yang@...el.com>
Subject: [PATCH v2 02/10] KVM: x86: Move MSR_TYPE_{R,W,RW} values from VMX to
 x86, as enums

Move VMX's MSR_TYPE_{R,W,RW} #defines to x86.h, as enums, so that they can
be used by common x86 code, e.g. instead of doing "bool write".

Opportunistically tweak the definitions to make it more obvious that the
values are bitmasks, not arbitrary ascending values.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/vmx/vmx.h | 4 ----
 arch/x86/kvm/x86.h     | 6 ++++++
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 42498fa63abb..3839afb921e2 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -17,10 +17,6 @@
 #include "run_flags.h"
 #include "../mmu.h"
 
-#define MSR_TYPE_R	1
-#define MSR_TYPE_W	2
-#define MSR_TYPE_RW	3
-
 #define X2APIC_MSR(r) (APIC_BASE_MSR + ((r) >> 4))
 
 #ifdef CONFIG_X86_64
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 50596f6f8320..499adef96038 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -504,6 +504,12 @@ int kvm_handle_memory_failure(struct kvm_vcpu *vcpu, int r,
 int kvm_handle_invpcid(struct kvm_vcpu *vcpu, unsigned long type, gva_t gva);
 bool kvm_msr_allowed(struct kvm_vcpu *vcpu, u32 index, u32 type);
 
+enum kvm_msr_access {
+	MSR_TYPE_R	= BIT(0),
+	MSR_TYPE_W	= BIT(1),
+	MSR_TYPE_RW	= MSR_TYPE_R | MSR_TYPE_W,
+};
+
 /*
  * Internal error codes that are used to indicate that MSR emulation encountered
  * an error that should result in #GP in the guest, unless userspace
-- 
2.46.0.rc2.264.g509ed76dc8-goog