Commit e4c9a5a1 authored by Marcelo Tosatti's avatar Marcelo Tosatti Committed by Paolo Bonzini
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KVM: x86: expose invariant tsc cpuid bit (v2) 



Invariant TSC is a property of TSC, no additional
support code necessary.

Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent e9545b9f

arch/x86/kvm/cpuid.c

+7 −1
Original line number Diff line number Diff line
@@ -495,6 +495,13 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 
		entry->ecx &= kvm_supported_word6_x86_features;

		cpuid_mask(&entry->ecx, 6);

		break;

	case 0x80000007: /* Advanced power management */

		/* invariant TSC is CPUID.80000007H:EDX[8] */

		entry->edx &= (1 << 8);

		/* mask against host */

		entry->edx &= boot_cpu_data.x86_power;

		entry->eax = entry->ebx = entry->ecx = 0;

		break;

	case 0x80000008: {

		unsigned g_phys_as = (entry->eax >> 16) & 0xff;

		unsigned virt_as = max((entry->eax >> 8) & 0xff, 48U);
@@ -525,7 +532,6 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 
	case 3: /* Processor serial number */

	case 5: /* MONITOR/MWAIT */

	case 6: /* Thermal management */

	case 0x80000007: /* Advanced power management */

	case 0xC0000002:

	case 0xC0000003:

	case 0xC0000004: