diff options
| author | Jesse Taube <jesse@rivosinc.com> | 2024-10-17 12:00:19 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-10-18 12:38:31 -0700 |
| commit | 9c528b5f7927b857b40f3c46afbc869827af3c94 (patch) | |
| tree | ab0f36074bb0c05c23076c01dbe2c13d6a50db5d | |
| parent | 8d20a739f17a2de9e269db72330f5655d6545dd4 (diff) | |
RISC-V: Scalar unaligned access emulated on hotplug CPUs
The check_unaligned_access_emulated() function should have been called
during CPU hotplug to ensure that if all CPUs had emulated unaligned
accesses, the new CPU also does.
This patch adds the call to check_unaligned_access_emulated() in
the hotplug path.
Fixes: 55e0bf49a0d0 ("RISC-V: Probe misaligned access speed in parallel")
Signed-off-by: Jesse Taube <jesse@rivosinc.com>
Reviewed-by: Evan Green <evan@rivosinc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20241017-jesse_unaligned_vector-v10-2-5b33500160f8@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | arch/riscv/kernel/unaligned_access_speed.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c index 160628a2116d..f3508cc54f91 100644 --- a/arch/riscv/kernel/unaligned_access_speed.c +++ b/arch/riscv/kernel/unaligned_access_speed.c @@ -191,6 +191,7 @@ static int riscv_online_cpu(unsigned int cpu) if (per_cpu(misaligned_access_speed, cpu) != RISCV_HWPROBE_MISALIGNED_SCALAR_UNKNOWN) goto exit; + check_unaligned_access_emulated(NULL); buf = alloc_pages(GFP_KERNEL, MISALIGNED_BUFFER_ORDER); if (!buf) { pr_warn("Allocation failure, not measuring misaligned performance\n"); |