Re: [PATCH v4] armv8: Handle EL2 Host mode

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!