[PATCH v3 07/17] riscv: misaligned: move emulated access uniformity check in a function

Clément Léger
2025-03-10T15:13:45Z

Split the code that check for the uniformity of misaligned accesses
performance on all cpus from check_unaligned_access_emulated_all_cpus()
to its own function which will be used for delegation check. No
functional changes intended.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
---
arch/riscv/kernel/traps_misaligned.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/arch/riscv/kernel/traps_misaligned.c b/arch/riscv/kernel/traps_misaligned.c
index 7fe25adf2539..db31966a834e 100644
--- a/arch/riscv/kernel/traps_misaligned.c
+++ b/arch/riscv/kernel/traps_misaligned.c
@@ -673,10 +673,20 @@ static int cpu_online_check_unaligned_access_emulated(unsigned int cpu)
return 0;
}

-bool check_unaligned_access_emulated_all_cpus(void)
+static bool all_cpus_unaligned_scalar_access_emulated(void)
{
int cpu;

+ for_each_online_cpu(cpu)
+ if (per_cpu(misaligned_access_speed, cpu) !=
+ RISCV_HWPROBE_MISALIGNED_SCALAR_EMULATED)
+ return false;
+
+ return true;
+}
+
+bool check_unaligned_access_emulated_all_cpus(void)
+{
/*
* We can only support PR_UNALIGN controls if all CPUs have misaligned
* accesses emulated since tasks requesting such control can run on any
@@ -684,10 +694,8 @@ bool check_unaligned_access_emulated_all_cpus(void)
*/
on_each_cpu(check_unaligned_access_emulated, NULL, 1);

- for_each_online_cpu(cpu)
- if (per_cpu(misaligned_access_speed, cpu)
- != RISCV_HWPROBE_MISALIGNED_SCALAR_EMULATED)
- return false;
+ if (!all_cpus_unaligned_scalar_access_emulated())
+ return false;

unaligned_ctl = true;
return true;
--
2.47.2