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From: Charlie Jenkins <charlie@rivosinc.com>
Date: Thu, 07 Mar 2024 11:05:46 -0800
Subject: [PATCH v8 2/4] riscv: Only check online cpus for emulated accesses
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Message-Id: <20240307-disable_misaligned_probe_config-v8-2-55d696cb398b@rivosinc.com>
References: <20240307-disable_misaligned_probe_config-v8-0-55d696cb398b@rivosinc.com>
In-Reply-To: <20240307-disable_misaligned_probe_config-v8-0-55d696cb398b@rivosinc.com>
To: Paul Walmsley <paul.walmsley@sifive.com>, 
 Palmer Dabbelt <palmer@dabbelt.com>, Albert Ou <aou@eecs.berkeley.edu>, 
 Jisheng Zhang <jszhang@kernel.org>, Evan Green <evan@rivosinc.com>, 
 =?utf-8?q?Cl=C3=A9ment_L=C3=A9ger?= <cleger@rivosinc.com>, 
 Eric Biggers <ebiggers@kernel.org>, 
 Elliot Berman <quic_eberman@quicinc.com>, Charles Lohr <lohr85@gmail.com>, 
 Conor Dooley <conor.dooley@microchip.com>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, 
 Charlie Jenkins <charlie@rivosinc.com>

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")
---
 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 8ded225e8c5b..c2ed4e689bf9 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;

-- 
2.43.2