Re: [PATCH 0/4] x86/xen: do some paravirt cleanup

[Peter Zijlstra <peterz@xxxxxxxxxxxxx>]

On Mon, Nov 16, 2020 at 04:22:57PM +0100, Juergen Gross wrote:
> Eliminate the usergs_sysret64 paravirt call completely and switch
> the swapgs one to use ALTERNATIVE instead. This requires to fix the
> IST based exception entries for Xen PV to use the same mechanism as
> NMI and debug exception already do.
> 
> Juergen Gross (4):
>   x86/xen: use specific Xen pv interrupt entry for MCE
>   x86/xen: use specific Xen pv interrupt entry for DF
>   x86/pv: switch SWAPGS to ALTERNATIVE
>   x86/xen: drop USERGS_SYSRET64 paravirt call

Looks 'sane' :-))

Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>