From: Igor Mammedov <imammedo@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, hpa@zytor.com, mingo@redhat.com,
tglx@linutronix.de, pbonzini@redhat.com, kvm@vger.kernel.org,
mtosatti@redhat.com
Subject: [PATCH 0/2] Avoid using TSC clocksource on AMD APUs affected by erratum 778
Date: Thu, 31 Jul 2014 09:47:11 +0000 [thread overview]
Message-ID: <1406800033-13404-1-git-send-email-imammedo@redhat.com> (raw)
Fixes pvclock backwards jumps caused by TSC drifting despite
host believing that TSC is invariant/synchronized.
TSC drift maybe caused by erratum 778 described in
"Revision Guide for AMD Family 15h Models 10h-1Fh Processors,
Publication # 48931, Issue Date: May 2013, Revision: 3.10"
Igor Mammedov (2):
x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh
x86: kvm: do not advertise stable clocksource if CPU has TSC drift BUG
arch/x86/include/asm/cpufeature.h | 1 +
arch/x86/kernel/cpu/amd.c | 9 +++++++++
arch/x86/kvm/cpuid.c | 3 ++-
3 files changed, 12 insertions(+), 1 deletion(-)
--
1.8.3.1
next reply other threads:[~2014-07-31 9:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-31 9:47 Igor Mammedov [this message]
2014-07-31 9:47 ` [PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh Igor Mammedov
2014-07-31 15:47 ` Borislav Petkov
2014-07-31 16:33 ` Paolo Bonzini
2014-08-01 9:02 ` Borislav Petkov
2014-07-31 9:47 ` [PATCH 2/2] x86: kvm: do not advertise stable clocksource if CPU has TSC drift BUG Igor Mammedov
2014-07-31 14:38 ` Paolo Bonzini
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