[PATCH 2/2] KVM: x86: Refactor and rename bit() to feature_bit() macro
From: Sean Christopherson
Date: Wed Dec 11 2019 - 12:58:34 EST
Rename bit() to __feature_bit() to give it a more descriptive name, and
add a macro, feature_bit(), to stuff the X68_FEATURE_ prefix to keep
line lengths manageable for code that hardcodes the bit to be retrieved.
No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
arch/x86/kvm/cpuid.c | 2 +-
arch/x86/kvm/cpuid.h | 4 ++--
arch/x86/kvm/emulate.c | 8 +++-----
arch/x86/kvm/svm.c | 4 ++--
arch/x86/kvm/vmx/vmx.c | 42 +++++++++++++++++++++---------------------
arch/x86/kvm/x86.h | 5 +++--
6 files changed, 32 insertions(+), 33 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index cfafa320a8cf..2b80948f5ddb 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -62,7 +62,7 @@ u64 kvm_supported_xcr0(void)
return xcr0;
}
-#define F(x) bit(X86_FEATURE_##x)
+#define F feature_bit
int kvm_update_cpuid(struct kvm_vcpu *vcpu)
{
diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index d78a61408243..5a96037e8fd7 100644
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -101,7 +101,7 @@ static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, unsigned x86_
if (!reg)
return false;
- return *reg & bit(x86_feature);
+ return *reg & __feature_bit(x86_feature);
}
static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, unsigned x86_feature)
@@ -110,7 +110,7 @@ static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, unsigned x8
reg = guest_cpuid_get_register(vcpu, x86_feature);
if (reg)
- *reg &= ~bit(x86_feature);
+ *reg &= ~__feature_bit(x86_feature);
}
static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 952d1a4f4d7e..acb21e5b7e61 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2353,7 +2353,7 @@ static int emulator_has_longmode(struct x86_emulate_ctxt *ctxt)
eax = 0x80000001;
ecx = 0;
ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx, false);
- return edx & bit(X86_FEATURE_LM);
+ return edx & feature_bit(LM);
#else
return false;
#endif
@@ -3618,8 +3618,6 @@ static int em_mov(struct x86_emulate_ctxt *ctxt)
return X86EMUL_CONTINUE;
}
-#define FFL(x) bit(X86_FEATURE_##x)
-
static int em_movbe(struct x86_emulate_ctxt *ctxt)
{
u32 ebx, ecx, edx, eax = 1;
@@ -3629,7 +3627,7 @@ static int em_movbe(struct x86_emulate_ctxt *ctxt)
* Check MOVBE is set in the guest-visible CPUID leaf.
*/
ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx, false);
- if (!(ecx & FFL(MOVBE)))
+ if (!(ecx & feature_bit(MOVBE)))
return emulate_ud(ctxt);
switch (ctxt->op_bytes) {
@@ -4030,7 +4028,7 @@ static int check_fxsr(struct x86_emulate_ctxt *ctxt)
u32 eax = 1, ebx, ecx = 0, edx;
ctxt->ops->get_cpuid(ctxt, &eax, &ebx, &ecx, &edx, false);
- if (!(edx & FFL(FXSR)))
+ if (!(edx & feature_bit(FXSR)))
return emulate_ud(ctxt);
if (ctxt->ops->get_cr(ctxt, 0) & (X86_CR0_TS | X86_CR0_EM))
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8f1b715dfde8..832b8ad5a178 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5924,14 +5924,14 @@ static void svm_cpuid_update(struct kvm_vcpu *vcpu)
guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC);
}
-#define F(x) bit(X86_FEATURE_##x)
+#define F feature_bit
static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
switch (func) {
case 0x1:
if (avic)
- entry->ecx &= ~bit(X86_FEATURE_X2APIC);
+ entry->ecx &= ~F(X2APIC);
break;
case 0x80000001:
if (nested)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 51e3b27f90ed..3608de5649f2 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6979,28 +6979,28 @@ static void nested_vmx_cr_fixed1_bits_update(struct kvm_vcpu *vcpu)
} while (0)
entry = kvm_find_cpuid_entry(vcpu, 0x1, 0);
- cr4_fixed1_update(X86_CR4_VME, edx, bit(X86_FEATURE_VME));
- cr4_fixed1_update(X86_CR4_PVI, edx, bit(X86_FEATURE_VME));
- cr4_fixed1_update(X86_CR4_TSD, edx, bit(X86_FEATURE_TSC));
- cr4_fixed1_update(X86_CR4_DE, edx, bit(X86_FEATURE_DE));
- cr4_fixed1_update(X86_CR4_PSE, edx, bit(X86_FEATURE_PSE));
- cr4_fixed1_update(X86_CR4_PAE, edx, bit(X86_FEATURE_PAE));
- cr4_fixed1_update(X86_CR4_MCE, edx, bit(X86_FEATURE_MCE));
- cr4_fixed1_update(X86_CR4_PGE, edx, bit(X86_FEATURE_PGE));
- cr4_fixed1_update(X86_CR4_OSFXSR, edx, bit(X86_FEATURE_FXSR));
- cr4_fixed1_update(X86_CR4_OSXMMEXCPT, edx, bit(X86_FEATURE_XMM));
- cr4_fixed1_update(X86_CR4_VMXE, ecx, bit(X86_FEATURE_VMX));
- cr4_fixed1_update(X86_CR4_SMXE, ecx, bit(X86_FEATURE_SMX));
- cr4_fixed1_update(X86_CR4_PCIDE, ecx, bit(X86_FEATURE_PCID));
- cr4_fixed1_update(X86_CR4_OSXSAVE, ecx, bit(X86_FEATURE_XSAVE));
+ cr4_fixed1_update(X86_CR4_VME, edx, feature_bit(VME));
+ cr4_fixed1_update(X86_CR4_PVI, edx, feature_bit(VME));
+ cr4_fixed1_update(X86_CR4_TSD, edx, feature_bit(TSC));
+ cr4_fixed1_update(X86_CR4_DE, edx, feature_bit(DE));
+ cr4_fixed1_update(X86_CR4_PSE, edx, feature_bit(PSE));
+ cr4_fixed1_update(X86_CR4_PAE, edx, feature_bit(PAE));
+ cr4_fixed1_update(X86_CR4_MCE, edx, feature_bit(MCE));
+ cr4_fixed1_update(X86_CR4_PGE, edx, feature_bit(PGE));
+ cr4_fixed1_update(X86_CR4_OSFXSR, edx, feature_bit(FXSR));
+ cr4_fixed1_update(X86_CR4_OSXMMEXCPT, edx, feature_bit(XMM));
+ cr4_fixed1_update(X86_CR4_VMXE, ecx, feature_bit(VMX));
+ cr4_fixed1_update(X86_CR4_SMXE, ecx, feature_bit(SMX));
+ cr4_fixed1_update(X86_CR4_PCIDE, ecx, feature_bit(PCID));
+ cr4_fixed1_update(X86_CR4_OSXSAVE, ecx, feature_bit(XSAVE));
entry = kvm_find_cpuid_entry(vcpu, 0x7, 0);
- cr4_fixed1_update(X86_CR4_FSGSBASE, ebx, bit(X86_FEATURE_FSGSBASE));
- cr4_fixed1_update(X86_CR4_SMEP, ebx, bit(X86_FEATURE_SMEP));
- cr4_fixed1_update(X86_CR4_SMAP, ebx, bit(X86_FEATURE_SMAP));
- cr4_fixed1_update(X86_CR4_PKE, ecx, bit(X86_FEATURE_PKU));
- cr4_fixed1_update(X86_CR4_UMIP, ecx, bit(X86_FEATURE_UMIP));
- cr4_fixed1_update(X86_CR4_LA57, ecx, bit(X86_FEATURE_LA57));
+ cr4_fixed1_update(X86_CR4_FSGSBASE, ebx, feature_bit(FSGSBASE));
+ cr4_fixed1_update(X86_CR4_SMEP, ebx, feature_bit(SMEP));
+ cr4_fixed1_update(X86_CR4_SMAP, ebx, feature_bit(SMAP));
+ cr4_fixed1_update(X86_CR4_PKE, ecx, feature_bit(PKU));
+ cr4_fixed1_update(X86_CR4_UMIP, ecx, feature_bit(UMIP));
+ cr4_fixed1_update(X86_CR4_LA57, ecx, feature_bit(LA57));
#undef cr4_fixed1_update
}
@@ -7134,7 +7134,7 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
if (func == 1 && nested)
- entry->ecx |= bit(X86_FEATURE_VMX);
+ entry->ecx |= feature_bit(VMX);
}
static void vmx_request_immediate_exit(struct kvm_vcpu *vcpu)
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 4ee4175c66a7..d6ea2e0b24f1 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -150,10 +150,10 @@ static inline bool is_pae_paging(struct kvm_vcpu *vcpu)
* "word" (stored in bits 31:5). The word is used to index into arrays of
* bit masks that hold the per-cpu feature capabilities, e.g. this_cpu_has().
*/
-static __always_inline u32 bit(int feature)
+static __always_inline u32 __feature_bit(u32 feature)
{
/*
- * bit() is intended to be used only for hardware-defined
+ * __feature_bit() is intended to be used only for hardware-defined
* words, i.e. words whose bits directly correspond to a CPUID leaf.
* Retrieving the bit mask from a Linux-defined word is nonsensical
* as the bit number/mask is an arbitrary software-defined value and
@@ -167,6 +167,7 @@ static __always_inline u32 bit(int feature)
return 1 << (feature & 31);
}
+#define feature_bit(name) __feature_bit(X86_FEATURE_##name)
static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu)
{
--
2.24.0