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([2a01:e0a:e17:9700:16d2:7456:6634:9626]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-22db5100c4esm16270255ad.173.2025.04.24.10.34.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Apr 2025 10:34:56 -0700 (PDT) From: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= To: Paul Walmsley , Palmer Dabbelt , Anup Patel , Atish Patra , Shuah Khan , Jonathan Corbet , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org Cc: =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= , Samuel Holland , Andrew Jones , Deepak Gupta Subject: [PATCH v6 09/14] riscv: misaligned: move emulated access uniformity check in a function Date: Thu, 24 Apr 2025 19:31:56 +0200 Message-ID: <20250424173204.1948385-10-cleger@rivosinc.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250424173204.1948385-1-cleger@rivosinc.com> References: <20250424173204.1948385-1-cleger@rivosinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Split the code that check for the uniformity of misaligned accesses performance on all cpus from check_unaligned_access_emulated_all_cpus() to its own function which will be used for delegation check. No functional changes intended. Signed-off-by: Cl=C3=A9ment L=C3=A9ger Reviewed-by: Andrew Jones --- arch/riscv/kernel/traps_misaligned.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/riscv/kernel/traps_misaligned.c b/arch/riscv/kernel/traps= _misaligned.c index e02e9b4b0fc5..410b2e0e0765 100644 --- a/arch/riscv/kernel/traps_misaligned.c +++ b/arch/riscv/kernel/traps_misaligned.c @@ -666,10 +666,20 @@ static int cpu_online_check_unaligned_access_emulated= (unsigned int cpu) return 0; } =20 -bool __init check_unaligned_access_emulated_all_cpus(void) +static bool all_cpus_unaligned_scalar_access_emulated(void) { int cpu; =20 + for_each_online_cpu(cpu) + if (per_cpu(misaligned_access_speed, cpu) !=3D + RISCV_HWPROBE_MISALIGNED_SCALAR_EMULATED) + return false; + + return true; +} + +bool __init check_unaligned_access_emulated_all_cpus(void) +{ /* * We can only support PR_UNALIGN controls if all CPUs have misaligned * accesses emulated since tasks requesting such control can run on any @@ -677,10 +687,8 @@ bool __init check_unaligned_access_emulated_all_cpus(v= oid) */ on_each_cpu(check_unaligned_access_emulated, NULL, 1); =20 - for_each_online_cpu(cpu) - if (per_cpu(misaligned_access_speed, cpu) - !=3D RISCV_HWPROBE_MISALIGNED_SCALAR_EMULATED) - return false; + if (!all_cpus_unaligned_scalar_access_emulated()) + return false; =20 unaligned_ctl =3D true; return true; --=20 2.49.0