From: Kiryl Shutsemau <kirill@shutemov.name>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>, James Morse <james.morse@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Marc Zyngier <maz@kernel.org>,
Doug Anderson <dianders@chromium.org>,
Petr Mladek <pmladek@suse.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Baoquan He <bhe@redhat.com>,
Puranjay Mohan <puranjay@kernel.org>,
Usama Arif <usama.arif@linux.dev>,
Breno Leitao <leitao@debian.org>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Lecopzer Chen <lecopzer@gmail.com>,
Sumit Garg <sumit.garg@kernel.org>,
kernel-team@meta.com, kexec@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 0/4] arm64: cross-CPU NMI via SDEI
Date: Tue, 30 Jun 2026 11:04:10 +0100 [thread overview]
Message-ID: <akOT3yaYVM6BTm_4@thinkstation> (raw)
In-Reply-To: <akKiV3CAKWLwHnsW@thinkstation>
On Mon, Jun 29, 2026 at 05:53:57PM +0100, Kiryl Shutsemau wrote:
> On Mon, Jun 29, 2026 at 04:54:18PM +0100, Catalin Marinas wrote:
> > Have you tried SDEI_EVENT_COMPLETE_AND_RESUME instead? Just COMPLETE
> > won't return to the kernel. We have sdei_handler_abort() to complete the
> > event and, hopefully, you can continue with the CPU_OFF. It's a work
> > around the TF-A non-compliance but I think this is useful even if you
> > don't issue the CPU_OFF (e.g. no CPU hotplug, just the park loop).
>
> Tried it. The result is the opposite of what I expected, and it argues
> against doing the complete at all under QEMU's TF-A.
I have to walk back on this. My test setup was broken. I will be back to
you with proper data.
--
Kiryl Shutsemau / Kirill A. Shutemov
next prev parent reply other threads:[~2026-06-30 10:04 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-17 19:20 [PATCH v4 0/4] arm64: cross-CPU NMI via SDEI Kiryl Shutsemau
2026-06-17 19:20 ` [PATCH v4 1/4] firmware: arm_sdei: add sdei_is_present() Kiryl Shutsemau
2026-06-17 20:02 ` Doug Anderson
2026-06-17 19:20 ` [PATCH v4 2/4] firmware: arm_sdei: add SDEI_EVENT_SIGNAL support Kiryl Shutsemau
2026-06-17 19:20 ` [PATCH v4 3/4] drivers/firmware: add SDEI cross-CPU NMI service for arm64 Kiryl Shutsemau
2026-06-18 10:46 ` Julian Braha
2026-06-18 15:48 ` Kiryl Shutsemau
2026-06-26 17:11 ` Catalin Marinas
2026-06-17 19:20 ` [PATCH v4 4/4] arm64: escalate smp_send_stop() to an SDEI NMI as a last resort Kiryl Shutsemau
2026-06-17 20:02 ` Doug Anderson
2026-06-26 17:08 ` Catalin Marinas
2026-06-26 19:46 ` Kiryl Shutsemau
2026-06-19 14:00 ` [PATCH v4 0/4] arm64: cross-CPU NMI via SDEI Catalin Marinas
2026-06-19 14:26 ` Marc Zyngier
2026-06-22 13:56 ` Kiryl Shutsemau
2026-06-22 16:52 ` Doug Anderson
2026-06-26 8:48 ` Breno Leitao
2026-06-26 8:25 ` YinFengwei
2026-06-26 17:07 ` Catalin Marinas
2026-06-26 19:40 ` Kiryl Shutsemau
2026-06-29 13:05 ` Kiryl Shutsemau
2026-06-29 15:54 ` Catalin Marinas
2026-06-29 16:53 ` Kiryl Shutsemau
2026-06-30 10:04 ` Kiryl Shutsemau [this message]
2026-07-02 13:57 ` Kiryl Shutsemau
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