linux-kernel - Re: [PATCH v5 33/36] KVM: arm64: Wrap the host with a stage 2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <da9e7839-6d12-c69d-9f23-a091219e1da8@arm.com>
Date:   Wed, 17 Mar 2021 09:41:09 +0100
From:   Mate Toth-Pal <mate.toth-pal@....com>
To:     Quentin Perret <qperret@...gle.com>
Cc:     catalin.marinas@....com, will@...nel.org, maz@...nel.org,
        james.morse@....com, julien.thierry.kdev@...il.com,
        suzuki.poulose@....com, android-kvm@...gle.com, seanjc@...gle.com,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org, kernel-team@...roid.com,
        kvmarm@...ts.cs.columbia.edu, tabba@...gle.com, ardb@...nel.org,
        mark.rutland@....com, dbrazdil@...gle.com, nd@....com
Subject: Re: [PATCH v5 33/36] KVM: arm64: Wrap the host with a stage 2

On 2021-03-16 18:46, Quentin Perret wrote:
> On Tuesday 16 Mar 2021 at 16:16:18 (+0100), Mate Toth-Pal wrote:
>> On 2021-03-16 15:29, Quentin Perret wrote:
>>> On Tuesday 16 Mar 2021 at 12:53:53 (+0000), Quentin Perret wrote:
>>>> On Tuesday 16 Mar 2021 at 13:28:42 (+0100), Mate Toth-Pal wrote:
>>>>> Changing the value of MT_S2_FWB_NORMAL to 7 would change this behavior, and
>>>>> the resulting memory type would be device.
>>>>
>>>> Sounds like the correct fix here -- see below.
>>>
>>> Just to clarify this, I meant this should be the configuration for the
>>> host stage-2. We'll want to keep the existing behaviour for guests I
>>> believe.
>>
>> I Agree.
> 
> OK, so the below seems to boot on my non-FWB-capable hardware and should
> fix the issue. Could you by any chance give it a spin?
> 

Sure, I can give it a go. I was trying to apply the patch on top of 
https://android-kvm.googlesource.com/linux/+/refs/heads/qperret/host-stage2-v5 
but it seems that your base is significantly different. Can you give 
some hints what should I use as base?