* Haozhong Zhang (haozhong.zhang@xxxxxxxxx) wrote:
> The newly added subsection 'vmstate_tsc_khz' in this patch results in
> vcpu's TSC rate being saved on the source machine and loaded on the
> target machine during the migration.
>
> Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
Hi,
I'd appreciate it if you could tie this to only do it on newer
machine types; that way it won't break back migration.
Dave
> ---
> target-i386/machine.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/target-i386/machine.c b/target-i386/machine.c
> index 9fa0563..80108a3 100644
> --- a/target-i386/machine.c
> +++ b/target-i386/machine.c
> @@ -752,6 +752,25 @@ static const VMStateDescription vmstate_xss = {
> }
> };
>
> +static bool tsc_khz_needed(void *opaque)
> +{
> + X86CPU *cpu = opaque;
> + CPUX86State *env = &cpu->env;
> +
> + return env->tsc_khz != 0;
> +}
> +
> +static const VMStateDescription vmstate_tsc_khz = {
> + .name = "cpu/tsc_khz",
> + .version_id = 1,
> + .minimum_version_id = 1,
> + .needed = tsc_khz_needed,
> + .fields = (VMStateField[]) {
> + VMSTATE_INT64(env.tsc_khz, X86CPU),
> + VMSTATE_END_OF_LIST()
> + }
> +};
> +
> VMStateDescription vmstate_x86_cpu = {
> .name = "cpu",
> .version_id = 12,
> @@ -871,6 +890,7 @@ VMStateDescription vmstate_x86_cpu = {
> &vmstate_msr_hyperv_crash,
> &vmstate_avx512,
> &vmstate_xss,
> + &vmstate_tsc_khz,
> NULL
> }
> };
> --
> 2.4.8
>
>
--
Dr. David Alan Gilbert / dgilbert@xxxxxxxxxx / Manchester, UK
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