From: Paolo Bonzini <pbonzini@redhat.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
QEMU Developers <qemu-devel@nongnu.org>
Cc: "Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Eduardo Habkost" <eduardo@habkost.net>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Laurent Vivier" <laurent@vivier.eu>
Subject: Re: [PATCH v7] hw/i386: pass RNG seed via setup_data entry
Date: Thu, 21 Jul 2022 15:00:42 +0200 [thread overview]
Message-ID: <4ef7500c-cce7-e7eb-9c4f-aedf2ee000bd@redhat.com> (raw)
In-Reply-To: <20220721125636.446842-1-Jason@zx2c4.com>
On 7/21/22 14:56, Jason A. Donenfeld wrote:
> Tiny machines optimized for fast boot time generally don't use EFI,
> which means a random seed has to be supplied some other way. For this
> purpose, Linux (≥5.20) supports passing a seed in the setup_data table
> with SETUP_RNG_SEED, specially intended for hypervisors, kexec, and
> specialized bootloaders. The linked commit shows the upstream kernel
> implementation.
>
> At Paolo's request, we don't pass these to versioned machine types ≤7.0.
>
> Link: https://git.kernel.org/tip/tip/c/68b8e9713c8
> Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Richard Henderson <richard.henderson@linaro.org>
> Cc: Eduardo Habkost <eduardo@habkost.net>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
> Cc: Laurent Vivier <laurent@vivier.eu>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
LGTM.
Paolo
next prev parent reply other threads:[~2022-07-21 13:03 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-11 14:54 [PATCH v3] hw/i386: pass RNG seed via setup_data entry Jason A. Donenfeld
2022-07-19 11:53 ` [PATCH resend " Jason A. Donenfeld
2022-07-20 13:03 ` Jason A. Donenfeld
2022-07-21 9:19 ` Paolo Bonzini
2022-07-21 9:47 ` Jason A. Donenfeld
2022-07-21 9:56 ` Jason A. Donenfeld
2022-07-21 10:09 ` [PATCH v4] " Jason A. Donenfeld
2022-07-21 10:35 ` Michael S. Tsirkin
2022-07-21 10:42 ` Jason A. Donenfeld
2022-07-21 10:47 ` [PATCH v5] " Jason A. Donenfeld
2022-07-21 10:49 ` [PATCH v6] " Jason A. Donenfeld
2022-07-21 11:00 ` Michael S. Tsirkin
2022-07-21 11:00 ` Jason A. Donenfeld
2022-07-21 11:47 ` Paolo Bonzini
2022-07-21 12:16 ` Jason A. Donenfeld
2022-07-21 12:27 ` Daniel P. Berrangé
2022-07-21 12:41 ` Paolo Bonzini
2022-07-21 12:52 ` Jason A. Donenfeld
2022-07-21 12:56 ` [PATCH v7] " Jason A. Donenfeld
2022-07-21 13:00 ` Paolo Bonzini [this message]
2022-07-21 13:00 ` Paolo Bonzini
2022-07-21 13:04 ` Jason A. Donenfeld
2022-07-22 6:10 ` Paolo Bonzini
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