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Subject[PATCH 31/61] KVM: x86: Handle INVPCID CPUID adjustment in VMX code
Date
Move the INVPCID CPUID adjustments into VMX to eliminate an instance of
the undesirable "unsigned f_* = *_supported ? F(*) : 0" pattern in the
common CPUID handling code. Drop ->invpcid_supported(), CPUID
adjustment was the only user.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/include/asm/kvm_host.h | 1 -
arch/x86/kvm/cpuid.c | 3 +--
arch/x86/kvm/svm.c | 6 ------
arch/x86/kvm/vmx/vmx.c | 10 +++-------
4 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a61928d5435b..9baff70ad419 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1144,7 +1144,6 @@ struct kvm_x86_ops {
u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
int (*get_lpage_level)(void);
bool (*rdtscp_supported)(void);
- bool (*invpcid_supported)(void);

void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 09e24d1d731c..a5f150204d73 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -339,7 +339,6 @@ static int __do_cpuid_func_emulated(struct kvm_cpuid_array *array, u32 func)

static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry)
{
- unsigned f_invpcid = kvm_x86_ops->invpcid_supported() ? F(INVPCID) : 0;
unsigned f_umip = kvm_x86_ops->umip_emulated() ? F(UMIP) : 0;
unsigned f_intel_pt = kvm_x86_ops->pt_supported() ? F(INTEL_PT) : 0;
unsigned f_la57;
@@ -348,7 +347,7 @@ static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry)
/* cpuid 7.0.ebx */
const u32 kvm_cpuid_7_0_ebx_x86_features =
F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) |
- F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | 0 /*MPX*/ | F(RDSEED) |
+ F(BMI2) | F(ERMS) | 0 /*INVPCID*/ | F(RTM) | 0 /*MPX*/ | F(RDSEED) |
F(ADX) | F(SMAP) | F(AVX512IFMA) | F(AVX512F) | F(AVX512PF) |
F(AVX512ER) | F(AVX512CD) | F(CLFLUSHOPT) | F(CLWB) | F(AVX512DQ) |
F(SHA_NI) | F(AVX512BW) | F(AVX512VL) | f_intel_pt;
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 7bb5d81f0f11..c0f8c09f3b04 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -6074,11 +6074,6 @@ static bool svm_rdtscp_supported(void)
return boot_cpu_has(X86_FEATURE_RDTSCP);
}

-static bool svm_invpcid_supported(void)
-{
- return false;
-}
-
static bool svm_xsaves_supported(void)
{
return boot_cpu_has(X86_FEATURE_XSAVES);
@@ -7459,7 +7454,6 @@ static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
.cpuid_update = svm_cpuid_update,

.rdtscp_supported = svm_rdtscp_supported,
- .invpcid_supported = svm_invpcid_supported,
.xsaves_supported = svm_xsaves_supported,
.umip_emulated = svm_umip_emulated,
.pt_supported = svm_pt_supported,
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 143193fc178e..49ee4c600934 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1656,11 +1656,6 @@ static bool vmx_rdtscp_supported(void)
return cpu_has_vmx_rdtscp();
}

-static bool vmx_invpcid_supported(void)
-{
- return cpu_has_vmx_invpcid();
-}
-
/*
* Swap MSR entry in host/guest MSR entry array.
*/
@@ -4071,7 +4066,7 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
}
}

- if (vmx_invpcid_supported()) {
+ if (cpu_has_vmx_invpcid()) {
/* Exposing INVPCID only when PCID is exposed */
bool invpcid_enabled =
guest_cpuid_has(vcpu, X86_FEATURE_INVPCID) &&
@@ -7114,6 +7109,8 @@ static void vmx_set_supported_cpuid(struct kvm_cpuid_entry2 *entry)
case 0x7:
if (boot_cpu_has(X86_FEATURE_MPX) && kvm_mpx_supported())
cpuid_entry_set(entry, X86_FEATURE_MPX);
+ if (boot_cpu_has(X86_FEATURE_INVPCID) && cpu_has_vmx_invpcid())
+ cpuid_entry_set(entry, X86_FEATURE_INVPCID);
break;
default:
break;
@@ -7854,7 +7851,6 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.cpuid_update = vmx_cpuid_update,

.rdtscp_supported = vmx_rdtscp_supported,
- .invpcid_supported = vmx_invpcid_supported,

.set_supported_cpuid = vmx_set_supported_cpuid,

--
2.24.1
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