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Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/kernel/fpsimd.c9
-rw-r--r--arch/arm64/kernel/ptrace.c10
2 files changed, 12 insertions, 7 deletions
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 520b681a07bb..75c37b1c55aa 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);
@@ -835,7 +835,8 @@ void sve_sync_from_fpsimd_zeropad(struct task_struct *task)
void *sst = task->thread.sve_state;
struct user_fpsimd_state const *fst = &task->thread.uw.fpsimd_state;
- if (!test_tsk_thread_flag(task, TIF_SVE))
+ if (!test_tsk_thread_flag(task, TIF_SVE) &&
+ !thread_sm_enabled(&task->thread))
return;
vq = sve_vq_from_vl(thread_get_cur_vl(&task->thread));
@@ -909,7 +910,7 @@ int vec_set_vector_length(struct task_struct *task, enum vec_type type,
*/
task->thread.svcr &= ~(SVCR_SM_MASK |
SVCR_ZA_MASK);
- clear_thread_flag(TIF_SME);
+ clear_tsk_thread_flag(task, TIF_SME);
free_sme = true;
}
}
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index d7f4f0d1ae12..5b9b4305248b 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -932,11 +932,13 @@ static int sve_set_common(struct task_struct *target,
/*
* Ensure target->thread.sve_state is up to date with target's
* FPSIMD regs, so that a short copyin leaves trailing
- * registers unmodified. Always enable SVE even if going into
- * streaming mode.
+ * registers unmodified. Only enable SVE if we are
+ * configuring normal SVE, a system with streaming SVE may not
+ * have normal SVE.
*/
fpsimd_sync_to_sve(target);
- set_tsk_thread_flag(target, TIF_SVE);
+ if (type == ARM64_VEC_SVE)
+ set_tsk_thread_flag(target, TIF_SVE);
target->thread.fp_type = FP_STATE_SVE;
BUILD_BUG_ON(SVE_PT_SVE_OFFSET != sizeof(header));
@@ -1180,6 +1182,8 @@ static int zt_set(struct task_struct *target,
if (ret == 0)
target->thread.svcr |= SVCR_ZA_MASK;
+ fpsimd_flush_task_state(target);
+
return ret;
}