Re: [PATCH v2 2/2] arm64: sdei: Preserve the interrupted context's exception registers

[Breno Leitao]

On Fri, Nov 06, 2026 at 11:34:19AM +0000, Kiryl Shutsemau wrote:
> On Thu, Nov 05, 2026 at 07:41:12AM -0800, Breno Leitao wrote:
> > On Thu, Nov 05, 2026 at 12:08:34PM +0000, Kiryl Shutsemau wrote:
> > Tested-by: Breno Leitao <leitao@xxxxxxxxxx>
> > 
> > Tested on NVIDIA Grace (firmware SDEI) with next-20261104, KASAN + lockdep,
> > ARM_SDEI_NMI=y: sysrq-l under stress-ng, with a kprobe on show_regs() and
> > eprobes on irq_disable/irq_enable that fault on purpose.
> > 
> > Without the series the box crashed (a task interrupted in el0t_64_sync
> > got the handler's BRK, then lockdep/KASAN fallout and a hard lockup)
> > 
> > With it, KPTI off and kpti=1, ~4000 kprobe hits and ~5500 faults in
> > irqentry_nmi_enter()/exit() produced no warnings or stalls.
> 
> Thanks for testing!
> 
> Just to clarify, does your Tested-by apply for whole series, right?

Right. I was planning to do it in the cover letter, but, there was no
tags there (such as Signed-off-by:) so, I did it on the second one.