Hi Peter,
sorry, missed this email before sending out v6.
On Wed, Jun 16, 2021 at 06:04:26PM +0200, Peter Zijlstra wrote:
> On Mon, Jun 14, 2021 at 03:53:24PM +0200, Joerg Roedel wrote:
> > _ASM_NOKPROBE(\asmsym)
> > SYM_CODE_END(\asmsym)
>
> Consistency with idtentry_mce_db would seem to suggest using \cfunc and
> noist_\cfunc.
>
> amluto, tglx: do we have strong feelings on consistency?
Yeah, but this distinction does not make sense here, as none of the #VC
handlers C functions run on the actual #VC IST stack. The from-kernel
function might run on the fall-back stack (not really possible today
unless the hypervisor does something nasty). And the difference between
the fall-back stack and the actual IST stack is, that on the fall-back
stack nesting #VC exceptions is still supported.
> > + vc_handle_trap_db(regs);
>
> It's a bit sad this does user_mode(regs) again.
Okay, I will change this according your comments.
Thanks,
Joerg
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