From: Yangyu Chen <cyy@cyyself.name>
To: linux-riscv@lists.infradead.org
Cc: "Elliott Hughes" <enh@google.com>,
"Charlie Jenkins" <charlie@rivosinc.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Evan Green" <evan@rivosinc.com>,
"Clément Léger" <cleger@rivosinc.com>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Andrew Jones" <ajones@ventanamicro.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
"Yangyu Chen" <cyy@cyyself.name>
Subject: [PATCH 1/2] docs: riscv: Clarify risc-v hwprobe RISCV_HWPROBE_MISALIGNED_* docs.
Date: Sun, 19 May 2024 00:00:11 +0800 [thread overview]
Message-ID: <tencent_7C21508D6B7C6C824ADA8E8E28B827310908@qq.com> (raw)
In-Reply-To: <tencent_9D721BDDF88C04DBB5151D57711D62524209@qq.com>
From: enh <enh@google.com>
These only tell you about scalar accesses, not vector accesses.
Signed-off-by: Elliott Hughes <enh@google.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
---
Documentation/arch/riscv/hwprobe.rst | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
index b2bcc9eed9aa..239be63f5089 100644
--- a/Documentation/arch/riscv/hwprobe.rst
+++ b/Documentation/arch/riscv/hwprobe.rst
@@ -192,21 +192,21 @@ The following keys are defined:
information about the selected set of processors.
* :c:macro:`RISCV_HWPROBE_MISALIGNED_UNKNOWN`: The performance of misaligned
- accesses is unknown.
+ scalar accesses is unknown.
- * :c:macro:`RISCV_HWPROBE_MISALIGNED_EMULATED`: Misaligned accesses are
+ * :c:macro:`RISCV_HWPROBE_MISALIGNED_EMULATED`: Misaligned scalar accesses are
emulated via software, either in or below the kernel. These accesses are
always extremely slow.
- * :c:macro:`RISCV_HWPROBE_MISALIGNED_SLOW`: Misaligned accesses are slower
- than equivalent byte accesses. Misaligned accesses may be supported
+ * :c:macro:`RISCV_HWPROBE_MISALIGNED_SLOW`: Misaligned scalar accesses are
+ slower than equivalent byte accesses. Misaligned accesses may be supported
directly in hardware, or trapped and emulated by software.
- * :c:macro:`RISCV_HWPROBE_MISALIGNED_FAST`: Misaligned accesses are faster
- than equivalent byte accesses.
+ * :c:macro:`RISCV_HWPROBE_MISALIGNED_FAST`: Misaligned scalar accesses are
+ faster than equivalent byte accesses.
- * :c:macro:`RISCV_HWPROBE_MISALIGNED_UNSUPPORTED`: Misaligned accesses are
- not supported at all and will generate a misaligned address fault.
+ * :c:macro:`RISCV_HWPROBE_MISALIGNED_UNSUPPORTED`: Misaligned scalar accesses
+ are not supported at all and will generate a misaligned address fault.
* :c:macro:`RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE`: An unsigned int which
represents the size of the Zicboz block in bytes.
--
2.43.0
next prev parent reply other threads:[~2024-05-18 16:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-18 15:57 [PATCH 0/2] docs: riscv: Some clarifies on hwprobe misaligned performance Yangyu Chen
2024-05-18 16:00 ` Yangyu Chen [this message]
2024-05-18 16:00 ` [PATCH 2/2] docs: riscv: hwprobe: Clarify misaligned keys are values not bitmasks Yangyu Chen
2024-05-21 18:36 ` Evan Green
2024-05-21 21:13 ` Charlie Jenkins
2024-05-22 7:26 ` Andrew Jones
2024-05-23 21:17 ` Charlie Jenkins
2024-05-24 1:08 ` Evan Green
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