On 06/02/2014 10:17 PM, Eric Blake wrote:
On 05/15/2014 02:31 AM, Ján Tomko wrote:
Add suport for invariant TSC flag (CPUID 0x80000007, bit 8 of EDX). If this flag is enabled, the TSC ticks at a constant rate across all ACPI P-, C- and T-states.
This can be enabled by adding: <feature name='invtsc'/> to the <cpu> element.
Migration and saving the domain does not work with this flag.
QEMU support for this is not merged yet: https://lists.gnu.org/archive/html/qemu-devel/2014-04/msg05024.html
In spite of Dan's ack, let's wait until it actually lands in qemu.git before you push this.
I have pushed the patch now that it's merged in qemu.git: http://git.qemu.org/?p=qemu.git;a=commitdiff;h=303752a commit 303752a9068bfe84b9b05f1cd5ad5ff65b7f3ea6 Author: Marcelo Tosatti <mtosatti@redhat.com> AuthorDate: 2014-04-30 13:48:45 -0300 Commit: Andreas Färber <afaerber@suse.de> CommitDate: 2014-06-25 23:54:57 +0200 target-i386: Support "invariant tsc" flag Jan