From: Sodagudi Prasad <psodagud@codeaurora.org>
To: julien.thierry@arm.com, will.deacon@arm.com,
catalin.marinas@arm.com, mark.rutland@arm.com,
lorenzo.pieralisi@arm.com, sudeep.holla@arm.com
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: PSCI version 1.1 and SYSTEM_RESET2
Date: Tue, 30 Apr 2019 17:07:31 -0700 [thread overview]
Message-ID: <efee74624f986a358b8986ae3085fba2@codeaurora.org> (raw)
In-Reply-To: <24970f7101952f347bd4046c9a980473@codeaurora.org>
On 2019-04-30 14:44, Sodagudi Prasad wrote:
+Sudeep
> Hi Mark/Will,
>
> I would like to understand whether ARM linux community have plans to
> support PSCI version 1.1 or not.
> PSCI_1_1 specification introduced support for SYSTEM_RESET2 command
> and this new command helps mobile devices to SYSTEM_WARM_RESET
> support. Rebooting devices with warm reboot helps to capture the
> snapshot of the ram contents for post-mortem analysis.
I think, there is a recent discussion from Sudeep for the SYSTEM_RESET2
support.
https://patchwork.kernel.org/patch/10884345/
Hi Sudeep,
I was going through your discussion in the below list -
https://lore.kernel.org/lkml/d73d3580-4ec1-a281-4585-5c776fc08c79@xilinx.com/
There is no provision to set up reboot mode dynamically instead kernel
command line parameter.
Looking for options to reboot device with warm reboot option when kernel
crashed.
panic() --> emergency_restart() --> machine_emergency_restart() -->
machine_restart(NULL);
It would nice if there is a config option to reboot the device either in
warm or cold in the case of kernel panic.
Calling machine_restart with a NULL parameter for kernel crash is
leading to devices cold reboot.
-Thanks, Prasad
>
> -Thanks, Prasad
--
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next prev parent reply other threads:[~2019-05-01 0:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-30 21:44 PSCI version 1.1 and SYSTEM_RESET2 Sodagudi Prasad
2019-05-01 0:07 ` Sodagudi Prasad [this message]
2019-05-01 9:49 ` Sudeep Holla
2019-05-01 18:43 ` Sodagudi Prasad
2019-05-02 9:05 ` Sudeep Holla
2019-05-09 1:38 ` Sodagudi Prasad
2019-05-09 1:47 ` [PATCH] kernel/panic: Use SYSTEM_RESET2 command for warm reset Prasad Sodagudi
2019-05-09 9:40 ` Sudeep Holla
2019-05-16 18:29 ` Aaro Koskinen
2019-05-17 18:03 ` Sodagudi Prasad
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