[19/26] KVM: x86: Handle UMIP emulation CPUID adjustment in VMX code

Commit Message

Sean Christopherson Jan. 29, 2020, 11:46 p.m. UTC

Move the CPUID adjustment for UMIP emulation into VMX code to eliminate
an instance of the undesirable "unsigned f_* = *_supported ? F(*) : 0"
pattern in the common CPUID handling code.

No functional change intended.

Signed-off-by: Sean Christopherson <[e-mail]>
---
 arch/x86/kvm/cpuid.c   | 2 --
 arch/x86/kvm/vmx/vmx.c | 3 +++
 2 files changed, 3 insertions(+), 2 deletions(-)

Patch

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 07526b81658e..d835f4662fba 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -321,7 +321,6 @@  static int __do_cpuid_func_emulated(struct kvm_cpuid_entry2 *entry,
 
 static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry, int index)
 {
-	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;
 	unsigned f_pku = kvm_x86_ops->pku_supported() ? F(PKU) : 0;
@@ -364,7 +363,6 @@  static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry, int index)
 		cpuid_mask(&entry->ecx, CPUID_7_ECX);
 		/* Set LA57 based on hardware capability. */
 		entry->ecx |= f_la57;
-		entry->ecx |= f_umip;
 		entry->ecx |= f_pku;
 		/* PKU is not yet implemented for shadow paging. */
 		if (!tdp_enabled || !boot_cpu_has(X86_FEATURE_OSPKE))
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 14e5031772e5..6bcdfb8744d3 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7141,6 +7141,9 @@  static void vmx_set_supported_cpuid(struct kvm_cpuid_entry2 *entry)
 			cpuid_entry_clear(entry, X86_FEATURE_MPX);
 		if (!cpu_has_vmx_invpcid())
 			cpuid_entry_clear(entry, X86_FEATURE_INVPCID);
+
+		if (vmx_umip_emulated())
+			cpuid_entry_set(entry, X86_FEATURE_UMIP);
 		break;
 	default:
 		break;