From: Mihai Carabas <mihai.carabas@oracle.com>
To: scott@os.amperecomputing.com
Cc: catalin.marinas@arm.com, darren@os.amperecomputing.com,
james.morse@arm.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, will@kernel.org
Subject: Re: [PATCH v6] arm64: sdei: abort running SDEI handlers during crash
Date: Thu, 20 Jul 2023 12:43:35 +0300 [thread overview]
Message-ID: <9830b94a-da88-48f2-6fcd-da46b2e2ed0a@oracle.com> (raw)
In-Reply-To: <20230627002939.2758-1-scott@os.amperecomputing.com>
> Interrupts are blocked in SDEI context, per the SDEI spec: "The client
> interrupts cannot preempt the event handler." If we crashed in the SDEI
> handler-running context (as with ACPI's AGDI) then we need to clean
up the
> SDEI state before proceeding to the crash kernel so that the crash kernel
> can have working interrupts.
>
> Track the active SDEI handler per-cpu so that we can COMPLETE_AND_RESUME
> the handler, discarding the interrupted context.
> Fixes: f5df26961853 ("arm64: kernel: Add arch-specific SDEI entry
code and CPU masking")
> Signed-off-by: D Scott Phillips <scott@os.amperecomputing.com>
We have tested successfully this patch on Altra and AmpereOne.
Tested-by: Mihai Carabas <mihai.carabas@oracle.com>
next prev parent reply other threads:[~2023-07-20 9:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-27 0:29 D Scott Phillips
2023-07-06 22:00 ` D Scott Phillips
2023-07-20 9:43 ` Mihai Carabas [this message]
2023-07-24 20:31 ` D Scott Phillips
2023-08-02 14:24 ` James Morse
2023-08-04 18:10 ` Will Deacon
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