linux-kernel - Re: [PATCH] arm64/io: Don't use WZR in writel

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Message-ID: <235d20ef-3054-69d9-975d-25aebf32aad3@arm.com>
Date:   Mon, 11 Feb 2019 14:59:10 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     AngeloGioacchino Del Regno <kholk11@...il.com>,
        Will Deacon <will.deacon@....com>
Cc:     Jens Axboe <axboe@...nel.dk>,
        Catalin Marinas <catalin.marinas@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] arm64/io: Don't use WZR in writel

On 11/02/2019 14:29, AngeloGioacchino Del Regno wrote:

[...]

> Also, just one more thing: yes this thing is going ARM64-wide and
> - from my findings - it's targeting certain Qualcomm SoCs, but...
> I'm not sure that only QC is affected by that, others may as well
> have the same stupid bug.
> 

At the moment, only QC SoCs seem to be affected, probably because
everyone else has debugged their hypervisor (or most likely doesn't
bother with shipping one).

In all honesty, we need some information from QC here: which SoCs are
affected, what is the exact nature of the bug, can it be triggered from
EL0. Randomly papering over symptoms is not something I really like
doing, and is likely to generate problems on unaffected systems.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...