From: Mark Brown <broonie@kernel.org> To: Oleg Nesterov <oleg@redhat.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org> Cc: David Spickett <David.Spickett@arm.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org>, stable@vger.kernel.org Subject: [PATCH 2/3] arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems Date: Thu, 03 Aug 2023 19:33:22 +0100 [thread overview] Message-ID: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-2-49df214bfb3e@kernel.org> (raw) In-Reply-To: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-0-49df214bfb3e@kernel.org> 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: e12310a0d30 ("arm64/sme: Implement ptrace support for streaming mode SVE registers") Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org --- arch/arm64/kernel/fpsimd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 520b681a07bb..b4afa0d147cc 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -679,7 +679,7 @@ 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)); @@ -705,7 +705,7 @@ 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); -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org> To: Oleg Nesterov <oleg@redhat.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org> Cc: David Spickett <David.Spickett@arm.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org>, stable@vger.kernel.org Subject: [PATCH 2/3] arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems Date: Thu, 03 Aug 2023 19:33:22 +0100 [thread overview] Message-ID: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-2-49df214bfb3e@kernel.org> (raw) In-Reply-To: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-0-49df214bfb3e@kernel.org> 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: e12310a0d30 ("arm64/sme: Implement ptrace support for streaming mode SVE registers") Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org --- arch/arm64/kernel/fpsimd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 520b681a07bb..b4afa0d147cc 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -679,7 +679,7 @@ 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)); @@ -705,7 +705,7 @@ 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); -- 2.30.2
next prev parent reply other threads:[~2023-08-03 18:43 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-08-03 18:33 [PATCH 0/3] arm64/ptrace: Fixes for more SME only streaming SVE cases Mark Brown 2023-08-03 18:33 ` Mark Brown 2023-08-03 18:33 ` [PATCH 1/3] arm64/ptrace: Don't enable SVE when setting streaming SVE Mark Brown 2023-08-03 18:33 ` Mark Brown 2023-08-03 18:33 ` Mark Brown [this message] 2023-08-03 18:33 ` [PATCH 2/3] arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems Mark Brown 2023-08-03 18:33 ` [PATCH 3/3] arm64/fpsimd: Sync and zero pad FPSIMD state for streaming SVE Mark Brown 2023-08-03 18:33 ` Mark Brown 2023-08-04 17:31 ` [PATCH 0/3] arm64/ptrace: Fixes for more SME only streaming SVE cases Catalin Marinas 2023-08-04 17:31 ` Catalin Marinas
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