From: Tom Rini <trini@konsulko.com>
To: Mark Kettenis <kettenis@openbsd.org>
Cc: u-boot@lists.denx.de, maz@kernel.org,
Stephen Warren <swarren@nvidia.com>,
Michal Simek <michal.simek@xilinx.com>,
Andre Przywara <andre.przywara@arm.com>,
"Edgar E. Iglesias" <edgar.iglesias@xilinx.com>,
Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: Re: [PATCH v4] armv8: Handle EL2 Host mode
Date: Fri, 9 Jul 2021 21:08:05 -0400 [thread overview]
Message-ID: <20210710010805.GK9516@bill-the-cat> (raw)
In-Reply-To: <20210210191456.25644-1-kettenis@openbsd.org>
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On Wed, Feb 10, 2021 at 08:14:55PM +0100, Mark Kettenis wrote:
> On implementations that support VHE, the layout of the CPTR_EL2
> register depends on whether HCR_EL2.E2H is set. If the bit is
> set, CPTR_EL2 uses the same layout as CPACR_EL1 and can in fact
> be accessed through that register. In that case, jump to the
> EL1 code to enable access to the FP/SIMD registers. This allows
> U-Boot to run on systems that pass control to U-Boot in EL2 with
> EL2 Host mode enabled such as machines using Apple's M1 SoC.
>
> Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
> Acked-by: Marc Zyngier <maz@kernel.org>
Applied to u-boot/master, thanks!
--
Tom
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prev parent reply other threads:[~2021-07-10 1:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 19:14 [PATCH v4] armv8: Handle EL2 Host mode Mark Kettenis
2021-02-11 9:58 ` Marc Zyngier
2021-02-11 10:22 ` Mark Kettenis
2021-02-11 10:44 ` Marc Zyngier
2021-07-10 1:08 ` Tom Rini [this message]
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