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Thu, 29 Jan 2026 09:29:43 -0800 (PST) Received: from draig (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id 067175F878; Thu, 29 Jan 2026 17:29:43 +0000 (GMT) From: =?utf-8?Q?Alex_Benn=C3=A9e?= To: Mark Brown Cc: Marc Zyngier , Joey Gouly , Catalin Marinas , Suzuki K Poulose , Will Deacon , Paolo Bonzini , Jonathan Corbet , Shuah Khan , Oliver Upton , Dave Martin , Fuad Tabba , Mark Rutland , Ben Horgan , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Peter Maydell , Eric Auger Subject: Re: [PATCH v9 04/30] arm64/fpsimd: Check enable bit for FA64 when saving EFI state In-Reply-To: <76bf33a0-968d-4b99-a157-3eef076af69d@sirena.org.uk> (Mark Brown's message of "Thu, 29 Jan 2026 16:41:05 +0000") References: <20251223-kvm-arm64-sme-v9-0-8be3867cb883@kernel.org> <20251223-kvm-arm64-sme-v9-4-8be3867cb883@kernel.org> <87343o8jay.fsf@draig.linaro.org> <76bf33a0-968d-4b99-a157-3eef076af69d@sirena.org.uk> User-Agent: mu4e 1.14.0-pre1; emacs 30.1 Date: Thu, 29 Jan 2026 17:29:42 +0000 Message-ID: <87wm1072ex.fsf@draig.linaro.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mark Brown writes: > On Thu, Jan 29, 2026 at 04:39:33PM +0000, Alex Benn=C3=A9e wrote: >> Mark Brown writes: > >> > 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 gu= est >> > support will mean that FA64 might be enabled and disabled at runtime s= witch >> > to checking if traps for FA64 are enabled in SMCR_EL1 instead. > >> 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 ;-) --=20 Alex Benn=C3=A9e Virtualisation Tech Lead @ Linaro