UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

arm64/fpsimd: SME no longer requires SVE register state 

Now that we track the type of the stored register state separately to
what is active in the task, it is valid to have the FPSIMD register
state stored while in streaming mode. Remove the special case handling
for SME when setting FPSIMD register state.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221115094640.112848-7-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Brown 2022-11-15 09:46:38 +00:00 committed by Will Deacon
parent a0136be443
commit bbc6172eef
2 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm64/kernel/fpsimd.c
View File

@ -815,8 +815,7 @@ void fpsimd_sync_to_sve(struct task_struct *task)
*/
void sve_sync_to_fpsimd(struct task_struct *task)
{
if (test_tsk_thread_flag(task, TIF_SVE) ||
thread_sm_enabled(&task->thread))
if (task->thread.fp_type == FP_STATE_SVE)
sve_to_fpsimd(task);
}

2
arch/arm64/kernel/ptrace.c
View File

@ -907,8 +907,6 @@ static int sve_set_common(struct task_struct *target,
ret = __fpr_set(target, regset, pos, count, kbuf, ubuf,
SVE_PT_FPSIMD_OFFSET);
clear_tsk_thread_flag(target, TIF_SVE);
if (type == ARM64_VEC_SME)
fpsimd_force_sync_to_sve(target);
target->thread.fp_type = FP_STATE_FPSIMD;
goto out;
}