linux-kernel - [PATCH v2 02/15] KVM: VMX: Prepend "MAX

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Date:   Wed, 23 Sep 2020 11:03:56 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 02/15] KVM: VMX: Prepend "MAX_" to MSR array size defines

Add "MAX" to the LOADSTORE and so called SHARED MSR defines to make it
more clear that the define controls the array size, as opposed to the
actual number of valid entries that are in the array.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/kvm/vmx/nested.c |  2 +-
 arch/x86/kvm/vmx/vmx.c    |  6 +++---
 arch/x86/kvm/vmx/vmx.h    | 10 +++++-----
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index b6ce9ce91029..f818a406302a 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -1040,7 +1040,7 @@ static void prepare_vmx_msr_autostore_list(struct kvm_vcpu *vcpu,
 	in_vmcs12_store_list = nested_msr_store_list_has_msr(vcpu, msr_index);
 
 	if (in_vmcs12_store_list && !in_autostore_list) {
-		if (autostore->nr == NR_LOADSTORE_MSRS) {
+		if (autostore->nr == MAX_NR_LOADSTORE_MSRS) {
 			/*
 			 * Emulated VMEntry does not fail here.  Instead a less
 			 * accurate value will be returned by
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index ae7badc3b5bd..e99f3bbfa6e9 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -929,8 +929,8 @@ static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
 	if (!entry_only)
 		j = vmx_find_msr_index(&m->host, msr);
 
-	if ((i < 0 && m->guest.nr == NR_LOADSTORE_MSRS) ||
-		(j < 0 &&  m->host.nr == NR_LOADSTORE_MSRS)) {
+	if ((i < 0 && m->guest.nr == MAX_NR_LOADSTORE_MSRS) ||
+	    (j < 0 &&  m->host.nr == MAX_NR_LOADSTORE_MSRS)) {
 		printk_once(KERN_WARNING "Not enough msr switch entries. "
 				"Can't add msr %x\n", msr);
 		return;
@@ -6850,7 +6850,7 @@ static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
 			goto free_vpid;
 	}
 
-	BUILD_BUG_ON(ARRAY_SIZE(vmx_msr_index) != NR_SHARED_MSRS);
+	BUILD_BUG_ON(ARRAY_SIZE(vmx_msr_index) != MAX_NR_SHARED_MSRS);
 
 	for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i) {
 		u32 index = vmx_msr_index[i];
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index d7ec66db5eb8..9a418c274880 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -22,16 +22,16 @@ extern const u32 vmx_msr_index[];
 #define X2APIC_MSR(r) (APIC_BASE_MSR + ((r) >> 4))
 
 #ifdef CONFIG_X86_64
-#define NR_SHARED_MSRS	7
+#define MAX_NR_SHARED_MSRS	7
 #else
-#define NR_SHARED_MSRS	4
+#define MAX_NR_SHARED_MSRS	4
 #endif
 
-#define NR_LOADSTORE_MSRS 8
+#define MAX_NR_LOADSTORE_MSRS	8
 
 struct vmx_msrs {
 	unsigned int		nr;
-	struct vmx_msr_entry	val[NR_LOADSTORE_MSRS];
+	struct vmx_msr_entry	val[MAX_NR_LOADSTORE_MSRS];
 };
 
 struct shared_msr_entry {
@@ -218,7 +218,7 @@ struct vcpu_vmx {
 	u32                   idt_vectoring_info;
 	ulong                 rflags;
 
-	struct shared_msr_entry guest_msrs[NR_SHARED_MSRS];
+	struct shared_msr_entry guest_msrs[MAX_NR_SHARED_MSRS];
 	int                   nmsrs;
 	int                   save_nmsrs;
 	bool                  guest_msrs_ready;
-- 
2.28.0