[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240724183605.4038597-5-jesse@rivosinc.com>
Date: Wed, 24 Jul 2024 14:36:01 -0400
From: Jesse Taube <jesse@...osinc.com>
To: linux-riscv@...ts.infradead.org
Cc: Jonathan Corbet <corbet@....net>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Conor Dooley <conor@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Clément Léger <cleger@...osinc.com>,
Evan Green <evan@...osinc.com>,
Andrew Jones <ajones@...tanamicro.com>,
Jesse Taube <jesse@...osinc.com>,
Charlie Jenkins <charlie@...osinc.com>,
Xiao Wang <xiao.w.wang@...el.com>,
Andy Chiu <andy.chiu@...ive.com>,
Eric Biggers <ebiggers@...gle.com>,
Greentime Hu <greentime.hu@...ive.com>,
Björn Töpel <bjorn@...osinc.com>,
Heiko Stuebner <heiko@...ech.de>,
Costa Shulyupin <costa.shul@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Baoquan He <bhe@...hat.com>,
Anup Patel <apatel@...tanamicro.com>,
Zong Li <zong.li@...ive.com>,
Sami Tolvanen <samitolvanen@...gle.com>,
Ben Dooks <ben.dooks@...ethink.co.uk>,
Alexandre Ghiti <alexghiti@...osinc.com>,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
Erick Archer <erick.archer@....com>,
Joel Granados <j.granados@...sung.com>,
linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
stable@...r.kernel.org
Subject: [PATCH v6 4/8] 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@...osinc.com>
Cc: stable@...r.kernel.org
---
V5 -> V6:
- New patch
---
arch/riscv/kernel/unaligned_access_speed.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c
index a9a6bcb02acf..b67db1fc3740 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_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");
--
2.45.2
Powered by blists - more mailing lists