From: Peter Maydell <peter.maydell@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>,
qemu-arm@nongnu.org, Jerome Forissier <jerome@forissier.org>,
qemu-devel@nongnu.org
Subject: Re: [PATCH] hw/arm: add control knob to disable kaslr_seed via DTB
Date: Wed, 15 Dec 2021 13:36:07 +0000 [thread overview]
Message-ID: <CAFEAcA_psjs5vaCZ06oU_OwSYorED4zgg+y-eD4nN5X2sRBVRg@mail.gmail.com> (raw)
In-Reply-To: <20211215120926.1696302-1-alex.bennee@linaro.org>
On Wed, 15 Dec 2021 at 12:09, Alex Bennée <alex.bennee@linaro.org> wrote:
>
> Generally a guest needs an external source of randomness to properly
> enable things like address space randomisation. However in a trusted
> boot environment where the firmware will cryptographically verify
> components having random data in the DTB will cause verification to
> fail. Add a control knob so we can prevent this being added to the
> system DTB.
Given that the DTB is automatically generated for the virt board,
firmware has no way to guarantee that it's the same every time
anyway, surely ?
-- PMM
next prev parent reply other threads:[~2021-12-15 14:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-15 12:09 [PATCH] hw/arm: add control knob to disable kaslr_seed via DTB Alex Bennée
2021-12-15 13:15 ` Ilias Apalodimas
2021-12-15 13:19 ` Jerome Forissier
2021-12-15 13:36 ` Peter Maydell [this message]
2021-12-15 13:43 ` Ilias Apalodimas
2021-12-16 17:10 ` Heinrich Schuchardt
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