Re: TSC trouble in hvm linux, after host S3

[Tomasz Wroblewski <tomasz.wroblewski@citrix.com>]

On 11/20/2013 12:51 PM, Jan Beulich wrote:
>>>> On 20.11.13 at 12:41, Tomasz Wroblewski <tomasz.wroblewski@citrix.com> wrote:
>> I've since found out that VMCS seems to provide tsc offsetting capabilities;
>> adding something like
>>
>>           for_each_vcpu ( d, v )
>>           {
>>               if (v->vcpu_id == 0)
>>                   hvm_set_guest_tsc(v, 0);
>>           }
>>
>> inside hvm_s3_resume (xen/arch/x86/hvm/hvm.c) fixed this for me; any comment
>> on such a solution?
>
> This sounds plausible, but I'd prefer it to be done alongside the other
> state resetting done for S3 (which all happen in hvm_s3_suspend()).
> Unless that doesn't work, of course.
>
All right, thanks! I'll try it out and post a patch, I think it should work. I've only reset the tsc on vcpu 0 since I've noticed same is 
done in hvm_vcpu_initialize(), is that enough?

> Jan
>