linux-kernel - Re: [PATCH 0/2] Make capsules in a contiguous virtual space

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Date:   Fri, 22 Dec 2017 15:50:23 +0000
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Richard Ruigrok <rruigrok@...eaurora.org>
Cc:     Ge Song <ge.song@...-semitech.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        linux-efi@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] Make capsules in a contiguous virtual space

On 21 December 2017 at 21:47, Richard Ruigrok <rruigrok@...eaurora.org> wrote:
> Please tested-by
> Tested on Centiq, applied on v4.15-rc4.
> This fixes the regression introduced in 4.13 where the capsule is no longer passed in contiguous virtual memory.
>
> On 12/19/2017 3:49 AM, Ge Song wrote:
>> Recently we found it failed to update firmware through capsule update
>> mechanism in linux-4.14 and later version.
>>
>> After some investigation, the reason is firmware expects capsules in a
>> contiguous virtual space and this assumption is not satisfied in recent
>> linux versions.
>>
>> Ge Song (2):
>>   Revert "efi/capsule-loader: Use page addresses rather than struct page
>>     pointers"
>>   efi/capsule-loader: Request a contiguous virtual space for capsules
>>


Thanks for the patches (and for the tested-by). I will look into this,
but I'd like to try to fix this without breaking the quirk we did for
Quark.



>>  drivers/firmware/efi/capsule-loader.c | 23 ++++++++++++++---------
>>  drivers/firmware/efi/capsule.c        |  7 +++----
>>  include/linux/efi.h                   |  4 ++--
>>  3 files changed, 19 insertions(+), 15 deletions(-)
>>
>
> --
> Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc.
> Qualcomm Technologies, Inc. is a member of the
> Code Aurora Forum, a Linux Foundation Collaborative Project.
>