Check for Zicclsm before checking for unaligned access speed. This will
greatly reduce the boot up time as finding the access speed is no longer
necessary.
Signed-off-by: Jesse Taube <jesse@xxxxxxxxxxxx>
---
V2 -> V3:
- New patch split from previous patch
---
arch/riscv/kernel/unaligned_access_speed.c | 26 ++++++++++++++--------
1 file changed, 17 insertions(+), 9 deletions(-)
diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c
index a9a6bcb02acf..329fd289b5c8 100644
--- a/arch/riscv/kernel/unaligned_access_speed.c
+++ b/arch/riscv/kernel/unaligned_access_speed.c
@@ -259,23 +259,31 @@ static int check_unaligned_access_speed_all_cpus(void)
kfree(bufs);
return 0;
}
+#else /* CONFIG_RISCV_PROBE_UNALIGNED_ACCESS */
+static int check_unaligned_access_speed_all_cpus(void)
+{
+ return 0;
+}
+#endif
static int check_unaligned_access_all_cpus(void)
{
- bool all_cpus_emulated = check_unaligned_access_emulated_all_cpus();
+ bool all_cpus_emulated;
+ int cpu;
+
+ if (riscv_has_extension_unlikely(RISCV_ISA_EXT_ZICCLSM)) {
+ for_each_online_cpu(cpu) {
+ per_cpu(misaligned_access_speed, cpu) = RISCV_HWPROBE_MISALIGNED_FAST;
+ }
+ return 0;
+ }
+
+ all_cpus_emulated = check_unaligned_access_emulated_all_cpus();
if (!all_cpus_emulated)
return check_unaligned_access_speed_all_cpus();
return 0;
}
-#else /* CONFIG_RISCV_PROBE_UNALIGNED_ACCESS */
-static int check_unaligned_access_all_cpus(void)
-{
- check_unaligned_access_emulated_all_cpus();
-
- return 0;
-}
-#endif
arch_initcall(check_unaligned_access_all_cpus);
--
2.45.2
