linux-kernel - Re: [PATCH V17 00/11] Add UEFI 2.6 and ACPI 6.1 updates for RAS on ARM64

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Message-ID: <20170607115012.GZ30263@arm.com>
Date:   Wed, 7 Jun 2017 12:50:12 +0100
From:   Will Deacon <will.deacon@....com>
To:     Tyler Baicar <tbaicar@...eaurora.org>
Cc:     christoffer.dall@...aro.org, marc.zyngier@....com,
        pbonzini@...hat.com, rkrcmar@...hat.com, linux@...linux.org.uk,
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Subject: Re: [PATCH V17 00/11] Add UEFI 2.6 and ACPI 6.1 updates for RAS on
 ARM64

On Fri, May 19, 2017 at 02:32:02PM -0600, Tyler Baicar wrote:
> When a memory error, CPU error, PCIe error, or other type of hardware error
> that's covered by RAS occurs, firmware should populate the shared GHES memory
> location with the proper GHES structures to notify the OS of the error.
> For example, platforms that implement firmware first handling may implement
> separate GHES sources for corrected errors and uncorrected errors. If the
> error is an uncorrectable error, then the firmware will notify the OS
> immediately since the error needs to be handled ASAP. The OS will then be able
> to take the appropriate action needed such as offlining a page. If the error
> is a corrected error, then the firmware will not interrupt the OS immediately.
> Instead, the OS will see and report the error the next time it's GHES timer
> expires. The kernel will first parse the GHES structures and report the errors
> through the kernel logs and then notify the user space through RAS trace
> events. This allows user space applications such as RAS Daemon to see the
> errors and report them however the user desires. This patchset extends the
> kernel functionality for RAS errors based on updates in the UEFI 2.6 and
> ACPI 6.1 specifications.

Thanks, I've pushed this out as:

  git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/ras-apei

which I'll merge into for-next/core (and therefore linux-next) either the
end of this week or the beginning of next week. Please take a look if you
get a chance.

Will