lkml.org 
[lkml]   [2014]   [Jul]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] x86: kvm: do not advertise stable clocksource if CPU has TSC drift BUG
Date
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
arch/x86/kvm/cpuid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 38a0afe..f519823 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -478,8 +478,9 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
(1 << KVM_FEATURE_CLOCKSOURCE2) |
(1 << KVM_FEATURE_ASYNC_PF) |
(1 << KVM_FEATURE_PV_EOI) |
- (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT) |
(1 << KVM_FEATURE_PV_UNHALT);
+ if (!static_cpu_has_bug(X86_BUG_AMD_TSC_DRIFT))
+ entry->eax |= (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT);

if (sched_info_on())
entry->eax |= (1 << KVM_FEATURE_STEAL_TIME);
--
1.8.3.1


\
 
 \ /
  Last update: 2014-07-31 12:41    [W:0.060 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site