Re: [Qemu-devel] [PATCH 2/3] qemu-x86: Add tsc_freq option to -cpu

[Marcelo Tosatti <mtosatti@redhat.com>]

On Tue, Jul 19, 2011 at 03:20:37PM +0300, Avi Kivity wrote:
> On 07/19/2011 02:46 PM, Marcelo Tosatti wrote:
> >On Thu, Jul 07, 2011 at 04:13:12PM +0200, Joerg Roedel wrote:
> >>  To let the user configure the desired tsc frequency for the
> >>  guest if running in KVM.
> >>
> >>  Signed-off-by: Joerg Roedel<joerg.roedel@amd.com>
> >>  ---
> >>   target-i386/cpu.h   |    1 +
> >>   target-i386/cpuid.c |   13 +++++++++++++
> >>   2 files changed, 14 insertions(+), 0 deletions(-)
> >>
> >>  diff --git a/target-i386/cpu.h b/target-i386/cpu.h
> >>  index cdf68ff..399e124 100644
> >>  --- a/target-i386/cpu.h
> >>  +++ b/target-i386/cpu.h
> >>  @@ -743,6 +743,7 @@ typedef struct CPUX86State {
> >>       uint32_t cpuid_kvm_features;
> >>       uint32_t cpuid_svm_features;
> >>       bool tsc_valid;
> >>  +    int tsc_khz;
> >
> >This should be saved/restore in migration data (missing VMSTATE entry).
> 
> Why?  It's static data.  Traditionally we only migrate runtime data.
> 
> (although we've been talking about starting a naked qemu and pushing
> all of the configuration from the source).

Right.