From: Charlie Jenkins <charlie@rivosinc.com>
Date: Fri, 8 Mar 2024 18:25:56 +0000 (-0800)
Subject: riscv: Only check online cpus for emulated accesses
X-Git-Tag: v6.8.2~66
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=52805f2f5e340d84d0d2829e050873456c716a2a;p=thirdparty%2Fkernel%2Fstable.git

riscv: Only check online cpus for emulated accesses

[ Upstream commit 313130c62cf1fc410ac8730b291fd4fde582d032 ]

The unaligned access checker only sets valid values for online cpus.
Check for these values on online cpus rather than on present cpus.

Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Fixes: 71c54b3d169d ("riscv: report misaligned accesses emulation to hwprobe")
Tested-by: Samuel Holland <samuel.holland@sifive.com>
Link: https://lore.kernel.org/r/20240308-disable_misaligned_probe_config-v9-2-a388770ba0ce@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/arch/riscv/kernel/traps_misaligned.c b/arch/riscv/kernel/traps_misaligned.c
index 8ded225e8c5b1..c2ed4e689bf96 100644
--- a/arch/riscv/kernel/traps_misaligned.c
+++ b/arch/riscv/kernel/traps_misaligned.c
@@ -632,7 +632,7 @@ void unaligned_emulation_finish(void)
 	 * accesses emulated since tasks requesting such control can run on any
 	 * CPU.
 	 */
-	for_each_present_cpu(cpu) {
+	for_each_online_cpu(cpu) {
 		if (per_cpu(misaligned_access_speed, cpu) !=
 					RISCV_HWPROBE_MISALIGNED_EMULATED) {
 			return;