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Message-Id: <20240724-xtheadvector-v7-11-b741910ada3e@rivosinc.com>
Date: Wed, 24 Jul 2024 12:14:02 -0700
From: Charlie Jenkins <charlie@...osinc.com>
To: Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
Jisheng Zhang <jszhang@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
Samuel Holland <samuel.holland@...ive.com>,
Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>,
Guo Ren <guoren@...nel.org>, Evan Green <evan@...osinc.com>,
Andy Chiu <andy.chiu@...ive.com>, Jessica Clarke <jrtc27@...c27.com>,
Andrew Jones <ajones@...tanamicro.com>
Cc: linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-sunxi@...ts.linux.dev,
linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org,
Charlie Jenkins <charlie@...osinc.com>
Subject: [PATCH v7 11/13] riscv: hwprobe: Document thead vendor extensions
and xtheadvector extension
Document support for thead vendor extensions using the key
RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0 and xtheadvector extension using
the key RISCV_HWPROBE_VENDOR_EXT_XTHEADVECTOR.
Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
Reviewed-by: Evan Green <evan@...osinc.com>
---
Documentation/arch/riscv/hwprobe.rst | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
index 02eb4d98b7de..b48a06ef80e0 100644
--- a/Documentation/arch/riscv/hwprobe.rst
+++ b/Documentation/arch/riscv/hwprobe.rst
@@ -264,3 +264,13 @@ The following keys are defined:
* :c:macro:`RISCV_HWPROBE_KEY_HIGHEST_VIRT_ADDRESS`: An unsigned long which
represent the highest userspace virtual address usable.
+
+* :c:macro:`RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0`: A bitmask containing the
+ thead vendor extensions that are compatible with the
+ :c:macro:`RISCV_HWPROBE_BASE_BEHAVIOR_IMA`: base system behavior.
+
+ * T-HEAD
+
+ * :c:macro:`RISCV_HWPROBE_VENDOR_EXT_XTHEADVECTOR`: The xtheadvector vendor
+ extension is supported in the T-Head ISA extensions spec starting from
+ commit a18c801634 ("Add T-Head VECTOR vendor extension. ").
--
2.44.0
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