From: Ryan Roberts <ryan.roberts@arm.com>
To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>
Cc: Bjorn Andersson <andersson@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v1] arm64: defconfig: Enable Virtio RNG driver as built in
Date: Thu, 23 Mar 2023 12:51:17 +0000 [thread overview]
Message-ID: <fd67d4aa-fb01-711a-8f89-b85dc4265899@arm.com> (raw)
In-Reply-To: <20230213101633.2085161-1-ryan.roberts@arm.com>
Hi Catalin, Will, all,
Just a polite nudge: Is there any reason it would be problematic to merge this?
Thanks,
Ryan
On 13/02/2023 10:16, Ryan Roberts wrote:
> Modern versions of FVP_Base_RevC-2xAEMvA contain a Virtio RNG device,
> use of which can dramatically speed up the time taken for Linux to
> initialize its CRNG, from 10s of seconds in some cases, to instant. This
> improves the debug cycle significantly.
>
> However, there are 2 barriers to getting people to use it. The first is
> that the defconfig doesn't have the required driver. The second is that
> the device is disabled in the device tree (for back-compat since older
> versions of the FVP don't have the device). Here we solve the first
> issue.
>
> Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
> ---
> arch/arm64/configs/defconfig | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 851e8f9be06d..e2dad45e87a7 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -464,6 +464,8 @@ CONFIG_VIRTIO_CONSOLE=y
> CONFIG_IPMI_HANDLER=m
> CONFIG_IPMI_DEVICE_INTERFACE=m
> CONFIG_IPMI_SI=m
> +CONFIG_HW_RANDOM=y
> +CONFIG_HW_RANDOM_VIRTIO=y
> CONFIG_TCG_TPM=y
> CONFIG_TCG_TIS=m
> CONFIG_TCG_TIS_SPI=m
> --
> 2.25.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
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next prev parent reply other threads:[~2023-03-23 12:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-13 10:16 [PATCH v1] arm64: defconfig: Enable Virtio RNG driver as built in Ryan Roberts
2023-03-23 12:51 ` Ryan Roberts [this message]
2023-03-23 17:37 ` Catalin Marinas
2023-03-24 17:49 ` Arnd Bergmann
2023-03-24 19:08 ` Ryan Roberts
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