Re: [PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh

2014-08-01 Thread Borislav Petkov
On Thu, Jul 31, 2014 at 09:47:12AM +, Igor Mammedov wrote: > Due to erratum #778 from > "Revision Guide for AMD Family 15h Models 10h-1Fh Processors, > Publication # 48931, Issue Date: May 2013, Revision: 3.10" > > TSC on affected processor, a core may drift under certain conditions, > which

Re: [PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh

2014-07-31 Thread Paolo Bonzini
Il 31/07/2014 17:47, Borislav Petkov ha scritto: > On Thu, Jul 31, 2014 at 09:47:12AM +, Igor Mammedov wrote: >> Due to erratum #778 from >> "Revision Guide for AMD Family 15h Models 10h-1Fh Processors, >> Publication # 48931, Issue Date: May 2013, Revision: 3.10" >> >> TSC on affected process

Re: [PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh

2014-07-31 Thread Borislav Petkov
On Thu, Jul 31, 2014 at 09:47:12AM +, Igor Mammedov wrote: > Due to erratum #778 from > "Revision Guide for AMD Family 15h Models 10h-1Fh Processors, > Publication # 48931, Issue Date: May 2013, Revision: 3.10" > > TSC on affected processor, a core may drift under certain conditions, > which

[PATCH 1/2] x86: AMD: mark TSC unstable on APU family 15h models 10h-1fh

2014-07-31 Thread Igor Mammedov
Due to erratum #778 from "Revision Guide for AMD Family 15h Models 10h-1Fh Processors, Publication # 48931, Issue Date: May 2013, Revision: 3.10" TSC on affected processor, a core may drift under certain conditions, which makes initially synchronized TSCs to become unsynchronized. As result TSC