From: Charlie Jenkins <charlie@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>, "Clément Léger" <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> Subject: [PATCH v5 0/2] riscv: Use Kconfig to set unaligned access speed Date: Tue, 27 Feb 2024 15:13:12 -0800 [thread overview] Message-ID: <20240227-disable_misaligned_probe_config-v5-0-b6853846e27a@rivosinc.com> (raw) If the hardware unaligned access speed is known at compile time, it is possible to avoid running the unaligned access speed probe to speedup boot-time. Signed-off-by: Charlie Jenkins <charlie@rivosinc.com> --- Changes in v5: - Clarify Kconfig options from Conor's feedback - Use "unaligned" instead of "misaligned" in introduced file/function. This is a bit hard to standardize because the riscv manual says "misaligned" but the existing Linux configs say "unaligned". - Link to v4: https://lore.kernel.org/r/20240216-disable_misaligned_probe_config-v4-0-dc01e581c0ac@rivosinc.com Changes in v4: - Add additional Kconfig options for the other unaligned access speeds - Link to v3: https://lore.kernel.org/r/20240202-disable_misaligned_probe_config-v3-0-c44f91f03bb6@rivosinc.com Changes in v3: - Revert change to csum (Eric) - Change ifndefs for ifdefs (Eric) - Change config in Makefile (Elliot/Eric) - Link to v2: https://lore.kernel.org/r/20240201-disable_misaligned_probe_config-v2-0-77c368bed7b2@rivosinc.com Changes in v2: - Move around definitions to reduce ifdefs (Clément) - Make RISCV_MISALIGNED depend on !HAVE_EFFICIENT_UNALIGNED_ACCESS (Clément) - Link to v1: https://lore.kernel.org/r/20240131-disable_misaligned_probe_config-v1-0-98d155e9cda8@rivosinc.com --- Charlie Jenkins (2): riscv: lib: Introduce has_fast_unaligned_access function riscv: Set unaligned access speed at compile time arch/riscv/Kconfig | 47 +++++- arch/riscv/include/asm/cpufeature.h | 43 ++++- arch/riscv/kernel/Makefile | 6 +- arch/riscv/kernel/cpufeature.c | 255 ------------------------------ arch/riscv/kernel/probe_emulated_access.c | 64 ++++++++ arch/riscv/kernel/sys_hwprobe.c | 23 +++ arch/riscv/kernel/traps_misaligned.c | 54 +------ arch/riscv/lib/csum.c | 7 +- 8 files changed, 173 insertions(+), 326 deletions(-) --- base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d change-id: 20240131-disable_misaligned_probe_config-043aea375f93 -- - Charlie
WARNING: multiple messages have this Message-ID (diff)
From: Charlie Jenkins <charlie@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>, "Clément Léger" <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> Subject: [PATCH v5 0/2] riscv: Use Kconfig to set unaligned access speed Date: Tue, 27 Feb 2024 15:13:12 -0800 [thread overview] Message-ID: <20240227-disable_misaligned_probe_config-v5-0-b6853846e27a@rivosinc.com> (raw) If the hardware unaligned access speed is known at compile time, it is possible to avoid running the unaligned access speed probe to speedup boot-time. Signed-off-by: Charlie Jenkins <charlie@rivosinc.com> --- Changes in v5: - Clarify Kconfig options from Conor's feedback - Use "unaligned" instead of "misaligned" in introduced file/function. This is a bit hard to standardize because the riscv manual says "misaligned" but the existing Linux configs say "unaligned". - Link to v4: https://lore.kernel.org/r/20240216-disable_misaligned_probe_config-v4-0-dc01e581c0ac@rivosinc.com Changes in v4: - Add additional Kconfig options for the other unaligned access speeds - Link to v3: https://lore.kernel.org/r/20240202-disable_misaligned_probe_config-v3-0-c44f91f03bb6@rivosinc.com Changes in v3: - Revert change to csum (Eric) - Change ifndefs for ifdefs (Eric) - Change config in Makefile (Elliot/Eric) - Link to v2: https://lore.kernel.org/r/20240201-disable_misaligned_probe_config-v2-0-77c368bed7b2@rivosinc.com Changes in v2: - Move around definitions to reduce ifdefs (Clément) - Make RISCV_MISALIGNED depend on !HAVE_EFFICIENT_UNALIGNED_ACCESS (Clément) - Link to v1: https://lore.kernel.org/r/20240131-disable_misaligned_probe_config-v1-0-98d155e9cda8@rivosinc.com --- Charlie Jenkins (2): riscv: lib: Introduce has_fast_unaligned_access function riscv: Set unaligned access speed at compile time arch/riscv/Kconfig | 47 +++++- arch/riscv/include/asm/cpufeature.h | 43 ++++- arch/riscv/kernel/Makefile | 6 +- arch/riscv/kernel/cpufeature.c | 255 ------------------------------ arch/riscv/kernel/probe_emulated_access.c | 64 ++++++++ arch/riscv/kernel/sys_hwprobe.c | 23 +++ arch/riscv/kernel/traps_misaligned.c | 54 +------ arch/riscv/lib/csum.c | 7 +- 8 files changed, 173 insertions(+), 326 deletions(-) --- base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d change-id: 20240131-disable_misaligned_probe_config-043aea375f93 -- - Charlie _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next reply other threads:[~2024-02-27 23:14 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-02-27 23:13 Charlie Jenkins [this message] 2024-02-27 23:13 ` [PATCH v5 0/2] riscv: Use Kconfig to set unaligned access speed Charlie Jenkins 2024-02-27 23:13 ` [PATCH v5 1/2] riscv: lib: Introduce has_fast_unaligned_access function Charlie Jenkins 2024-02-27 23:13 ` Charlie Jenkins 2024-02-27 23:13 ` [PATCH v5 2/2] riscv: Set unaligned access speed at compile time Charlie Jenkins 2024-02-27 23:13 ` Charlie Jenkins 2024-02-28 10:43 ` Conor Dooley 2024-02-28 10:43 ` Conor Dooley 2024-02-29 14:47 ` Conor Dooley 2024-02-29 14:47 ` Conor Dooley 2024-02-29 12:26 ` Conor Dooley 2024-02-29 12:26 ` Conor Dooley 2024-02-29 18:37 ` Charlie Jenkins 2024-02-29 18:37 ` Charlie Jenkins 2024-02-29 18:49 ` Conor Dooley 2024-02-29 18:49 ` Conor Dooley 2024-02-29 19:23 ` Charlie Jenkins 2024-02-29 19:23 ` Charlie Jenkins 2024-03-01 9:26 ` Conor Dooley 2024-03-01 9:26 ` Conor Dooley
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