linux-kernel - [PATCH 2/2] arm64: Document missing userspace visible fields in ID_AA64ISAR2

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Message-Id: <20230914-arm64-feat-hbc-doc-v1-2-797d25f06897@kernel.org>
Date:   Thu, 14 Sep 2023 11:09:30 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     Joey Gouly <joey.gouly@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 2/2] arm64: Document missing userspace visible fields in
 ID_AA64ISAR2_EL1

We have exposed a number of fields in ID_AA64ISAR2_EL1 to usersapce without
adding the matching documentation in cpu-feature-registers.rst, update it
to match the implementation.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 Documentation/arch/arm64/cpu-feature-registers.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/arch/arm64/cpu-feature-registers.rst b/Documentation/arch/arm64/cpu-feature-registers.rst
index 4e4625f2455f..46fd82acafab 100644
--- a/Documentation/arch/arm64/cpu-feature-registers.rst
+++ b/Documentation/arch/arm64/cpu-feature-registers.rst
@@ -288,8 +288,18 @@ infrastructure:
      +------------------------------+---------+---------+
      | Name                         |  bits   | visible |
      +------------------------------+---------+---------+
+     | CSSC                         | [55-52] |    y    |
+     +------------------------------+---------+---------+
+     | RPRFM                        | [51-48] |    y    |
+     +------------------------------+---------+---------+
+     | BC                           | [23-20] |    y    |
+     +------------------------------+---------+---------+
      | MOPS                         | [19-16] |    y    |
      +------------------------------+---------+---------+
+     | APA3                         | [15-12] |    y    |
+     +------------------------------+---------+---------+
+     | GPA3                         | [11-8]  |    y    |
+     +------------------------------+---------+---------+
      | RPRES                        | [7-4]   |    y    |
      +------------------------------+---------+---------+
      | WFXT                         | [3-0]   |    y    |

-- 
2.30.2