linux-kernel - Re: [PATCH 0/8] efi: Pass secure boot mode to kernel [ver #6]

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Date:   Fri, 27 Jan 2017 18:03:09 +0000
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Matt Fleming <matt@...eblueprint.co.uk>
Cc:     David Howells <dhowells@...hat.com>,
        "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-security-module <linux-security-module@...r.kernel.org>,
        keyrings@...r.kernel.org,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 0/8] efi: Pass secure boot mode to kernel [ver #6]

On 24 January 2017 at 17:15, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
> On 11 January 2017 at 15:05, Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
>> On 11 January 2017 at 15:01, Matt Fleming <matt@...eblueprint.co.uk> wrote:
>>> On Thu, 08 Dec, at 12:30:08PM, David Howells wrote:
>>>>
>>>> Here's a set of patches that can determine the secure boot state of the
>>>> UEFI BIOS and pass that along to the main kernel image.  This involves
>>>> generalising ARM's efi_get_secureboot() function and making it mixed-mode
>>>> safe.
>>>
>>> This version looks OK to me apart from the couple of comments I made.
>>>
>>> Ard, did you take a look? In particular some boot testing on ARM/arm64
>>> would be useful. x86 boots fine in both regular and mixed mode but
>>> I've only tested without Secure Boot enabled.
>>
>> I did take a look at these patches (and commented on them) as they
>> were coming in, but I haven't yet gone through them as thoroughly as I
>> should. I will test them on ARM/arm64 as well.
>
> Apologies for the tardiness. I intend to look into these tomorrow.

These patches build and run fine on arm, including on secure boot
systems, so I don't have any objections.

Once the open discussion points re x86 are resolved, I can proceed and
merge them if desired. Matt?