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[108.26.179.17]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2d40bea7cb3sm7258157a91.25.2024.08.20.08.24.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2024 08:24:38 -0700 (PDT) From: Jesse Taube To: linux-riscv@lists.infradead.org Cc: Jonathan Corbet , Paul Walmsley , Palmer Dabbelt , Albert Ou , Conor Dooley , Rob Herring , Krzysztof Kozlowski , =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , Evan Green , Andrew Jones , Jesse Taube , Charlie Jenkins , Xiao Wang , Andy Chiu , Eric Biggers , Greentime Hu , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , Heiko Stuebner , Costa Shulyupin , Andrew Morton , Baoquan He , Anup Patel , Zong Li , Sami Tolvanen , Ben Dooks , Alexandre Ghiti , "Gustavo A. R. Silva" , Erick Archer , Joel Granados , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v9 2/6] RISC-V: Scalar unaligned access emulated on hotplug CPUs Date: Tue, 20 Aug 2024 11:24:20 -0400 Message-ID: <20240820152424.1973078-3-jesse@rivosinc.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240820152424.1973078-1-jesse@rivosinc.com> References: <20240820152424.1973078-1-jesse@rivosinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Evan Green Cc: stable@vger.kernel.org --- V5 -> V6: - New patch V6 -> V7: - No changes V7 -> V8: - Rebase onto fixes V8 -> V9: - No changes --- 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 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) !=3D RISCV_HWPROBE_MISALIGNED_S= CALAR_UNKNOWN) goto exit; =20 + check_unaligned_access_emulated(NULL); buf =3D alloc_pages(GFP_KERNEL, MISALIGNED_BUFFER_ORDER); if (!buf) { pr_warn("Allocation failure, not measuring misaligned performance\n"); --=20 2.45.2