From: Mark Brown Date: Thu, 3 Aug 2023 18:33:22 +0000 (+0100) Subject: arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems X-Git-Tag: v6.1.52~553 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=61f96da37dd4fb166c7d9bdf76016b8340e5f85f;p=platform%2Fkernel%2Flinux-starfive.git arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems commit 507ea5dd92d23fcf10e4d1a68a443c86a49753ed upstream. Currently we guard FPSIMD/SVE state conversions with a check for the system supporting SVE but SME only systems may need to sync streaming mode SVE state so add a check for SME support too. These functions are only used by the ptrace code. Fixes: e12310a0d30f ("arm64/sme: Implement ptrace support for streaming mode SVE registers") Signed-off-by: Mark Brown Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230803-arm64-fix-ptrace-ssve-no-sve-v1-2-49df214bfb3e@kernel.org Signed-off-by: Catalin Marinas Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index f7dbc00..356036b 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -634,7 +634,7 @@ static void fpsimd_to_sve(struct task_struct *task) void *sst = task->thread.sve_state; struct user_fpsimd_state const *fst = &task->thread.uw.fpsimd_state; - if (!system_supports_sve()) + if (!system_supports_sve() && !system_supports_sme()) return; vq = sve_vq_from_vl(thread_get_cur_vl(&task->thread)); @@ -660,7 +660,7 @@ static void sve_to_fpsimd(struct task_struct *task) unsigned int i; __uint128_t const *p; - if (!system_supports_sve()) + if (!system_supports_sve() && !system_supports_sme()) return; vl = thread_get_cur_vl(&task->thread);