Re: [PATCH v9 04/30] arm64/fpsimd: Check enable bit for FA64 when saving EFI state
From: Alex Bennée <hidden>
Date: 2026-01-29 17:29:46
Also in:
kvm, kvmarm, linux-doc, linux-kselftest, lkml
Mark Brown [off-list ref] writes:
On Thu, Jan 29, 2026 at 04:39:33PM +0000, Alex Bennée wrote:quoted
Mark Brown [off-list ref] writes:quoted
quoted
Currently when deciding if we need to save FFR when in streaming mode prior to EFI calls we check if FA64 is supported by the system. Since KVM guest support will mean that FA64 might be enabled and disabled at runtime switch to checking if traps for FA64 are enabled in SMCR_EL1 instead.quoted
This is conflicting with the now merged 63de2b3859ba1 (arm64/efi: Remove unneeded SVE/SME fallback preserve/store handling) so I think this patch can now be dropped?Yes, this should go away in the next rebase.
Everything else applies cleanly though so thats good ;-) -- Alex Bennée Virtualisation Tech Lead @ Linaro