From: Heinrich Schuchardt <xypron.glpk@gmx.de>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
Jerome Forissier <jerome@forissier.org>,
qemu-devel@nongnu.org, qemu-arm@nongnu.org
Subject: Re: [PATCH] hw/arm: add control knob to disable kaslr_seed via DTB
Date: Thu, 16 Dec 2021 18:10:08 +0100 [thread overview]
Message-ID: <ded35220-e2f3-da6b-560c-2e3bb2aed300@gmx.de> (raw)
In-Reply-To: <20211215120926.1696302-1-alex.bennee@linaro.org>
On 12/15/21 13:09, Alex Bennée 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.
>
> Signed-off-by: Alex Bennée<alex.bennee@linaro.org>
> Cc: Ilias Apalodimas<ilias.apalodimas@linaro.org>
> Cc: Jerome Forissier<jerome@forissier.org>
> ---
> docs/system/arm/virt.rst | 7 +++++++
> include/hw/arm/virt.h | 1 +
> hw/arm/virt.c | 32 ++++++++++++++++++++++++++++++--
> 3 files changed, 38 insertions(+), 2 deletions(-)
>
> diff --git a/docs/system/arm/virt.rst b/docs/system/arm/virt.rst
> index 850787495b..c86a4808df 100644
> --- a/docs/system/arm/virt.rst
> +++ b/docs/system/arm/virt.rst
> @@ -121,6 +121,13 @@ ras
> Set ``on``/``off`` to enable/disable reporting host memory errors to a guest
> using ACPI and guest external abort exceptions. The default is off.
>
Tested on top of QEMU v6.1.0
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
prev parent reply other threads:[~2021-12-16 17:15 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
2021-12-15 13:43 ` Ilias Apalodimas
2021-12-16 17:10 ` Heinrich Schuchardt [this message]
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