Re: [Xen-devel] [PATCH] x86/vm_event: correctly gather gs_shadow value

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 5/1/19 7:22 AM, Tamas K Lengyel wrote:
> Currently the gs_shadow value is only cached when the vCPU is being scheduled
> out by Xen. Reporting this (usually) stale value through vm_event is 
> incorrect,
> since it doesn't represent the actual state of the vCPU at the time the event
> was recorded. This prevents vm_event subscribers from correctly finding kernel
> structures in the guest when it is trapped while in ring3.

Isn't the VCPU always scheduled out (since it is paused) with sync
vm_events? Is this an async fix only?

In any case,

Acked-by: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>


Thanks,
Razvan

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