Messages in this thread | | | From | Catalin Marinas <> | Subject | Re: [PATCH] arm64/sme: Optimise SME exit on syscall entry | Date | Thu, 12 Jan 2023 17:49:34 +0000 |
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On Tue, 10 Jan 2023 19:34:36 +0000, Mark Brown wrote: > Our ABI says that we exit streaming mode on syscall entry. Currently we > check if we are in streaming mode before doing this but since we have a > SMSTOP SM instruction which will clear SVCR.SM in a single atomic operation > we can save ourselves the read of the system register and check of the flag > and just unconditionally do the SMSTOP SM. If we are not in streaming mode > it results in a noop change to SVCR, if we are in streaming mode we will > exit as desired. > > [...]
Applied to arm64 (for-next/sme), thanks!
[1/1] arm64/sme: Optimise SME exit on syscall entry https://git.kernel.org/arm64/c/b2482807fbd4
-- Catalin
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