From: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit e4c9a5a17567f8ea975bdcfdd1bf9d63965de6c9 upstream.
Invariant TSC is a property of TSC, no additional
support code necessary.
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
arch/x86/kvm/cpuid.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index b132551528e5..6620ac307215 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -437,6 +437,13 @@ static 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);
@@ -467,7 +474,6 @@ static 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:
--
2.9.1
--
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