linux-kernel - Re: [PATCH V13 05/10] acpi: apei: handle SEA notification type for ARMv8

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Message-ID: <20170323175533.GB32309@e104818-lin.cambridge.arm.com>
Date:   Thu, 23 Mar 2017 17:55:33 +0000
From:   Catalin Marinas <catalin.marinas@....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,
        will.deacon@....com, rjw@...ysocki.net, lenb@...nel.org,
        matt@...eblueprint.co.uk, robert.moore@...el.com,
        lv.zheng@...el.com, nkaje@...eaurora.org, zjzhang@...eaurora.org,
        mark.rutland@....com, james.morse@....com,
        akpm@...ux-foundation.org, eun.taik.lee@...sung.com,
        sandeepa.s.prabhu@...il.com, labbott@...hat.com,
        shijie.huang@....com, rruigrok@...eaurora.org,
        paul.gortmaker@...driver.com, tn@...ihalf.com, fu.wei@...aro.org,
        rostedt@...dmis.org, bristot@...hat.com,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
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        devel@...ica.org, Suzuki.Poulose@....com, punit.agrawal@....com,
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        john.garry@...wei.com, shiju.jose@...wei.com, joe@...ches.com
Subject: Re: [PATCH V13 05/10] acpi: apei: handle SEA notification type for
 ARMv8

On Tue, Mar 21, 2017 at 04:47:00PM -0600, Tyler Baicar wrote:
> ARM APEI extension proposal added SEA (Synchronous External Abort)
> notification type for ARMv8.
> Add a new GHES error source handling function for SEA. If an error
> source's notification type is SEA, then this function can be registered
> into the SEA exception handler. That way GHES will parse and report
> SEA exceptions when they occur.
> An SEA can interrupt code that had interrupts masked and is treated as
> an NMI. To aid this the page of address space for mapping APEI buffers
> while in_nmi() is always reserved, and ghes_ioremap_pfn_nmi() is
> changed to use the helper methods to find the prot_t to map with in
> the same way as ghes_ioremap_pfn_irq().
> 
> Signed-off-by: Tyler Baicar <tbaicar@...eaurora.org>
> CC: Jonathan (Zhixiong) Zhang <zjzhang@...eaurora.org>
> Reviewed-by: James Morse <james.morse@....com>
> ---
>  arch/arm64/Kconfig        |  2 ++
>  arch/arm64/mm/fault.c     | 13 +++++++++
>  drivers/acpi/apei/Kconfig | 15 ++++++++++
>  drivers/acpi/apei/ghes.c  | 70 +++++++++++++++++++++++++++++++++++++++++++----
>  include/acpi/ghes.h       |  7 +++++
>  5 files changed, 101 insertions(+), 6 deletions(-)

For the arch/arm64 part in here:

Acked-by: Catalin Marinas <catalin.marinas@....com>