linux-kernel - [PATCH 6.8 650/715] riscv: Only check online cpus for emulated accesses

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Message-ID: <20240324223455.1342824-651-sashal@kernel.org>
Date: Sun, 24 Mar 2024 18:33:49 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Charlie Jenkins <charlie@...osinc.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Palmer Dabbelt <palmer@...osinc.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.8 650/715] riscv: Only check online cpus for emulated accesses

From: Charlie Jenkins <charlie@...osinc.com>

[ 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@...osinc.com>
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
Fixes: 71c54b3d169d ("riscv: report misaligned accesses emulation to hwprobe")
Tested-by: Samuel Holland <samuel.holland@...ive.com>
Link: https://lore.kernel.org/r/20240308-disable_misaligned_probe_config-v9-2-a388770ba0ce@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/riscv/kernel/traps_misaligned.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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;
-- 
2.43.0