Re: [PATCH v3 08/11] x86/traps: Demand-populate PASID MSR via #GP

[Thomas Gleixner]

On Fri, Jan 28 2022 at 12:29, Fenghua Yu wrote:

> All tasks start with PASID state disabled. This means that the first
> time they execute an ENQCMD instruction they will take a #GP fault.
>
> Modify the #GP fault handler to check if the "mm" for the task has
> already been allocated a PASID. If so, try to fix the #GP fault by
> loading the IA32_PASID MSR.
>
> Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
> Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx>

Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>