From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Shuah Khan <skhan@linuxfoundation.org>,
Shuah Khan <shuah@kernel.org>
Cc: Szabolcs Nagy <szabolcs.nagy@arm.com>,
linux-arm-kernel@lists.infradead.org,
Mark Brown <broonie@kernel.org>
Subject: [PATCH v1 1/4] arm64/sme: Document ABI for TPIDR2 signal information
Date: Fri, 28 Oct 2022 19:50:43 +0100 [thread overview]
Message-ID: <20221028185046.1316730-2-broonie@kernel.org> (raw)
In-Reply-To: <20221028185046.1316730-1-broonie@kernel.org>
In order to allow access to TPIDR2 from signal handlers we need to add it
to the signal context, document that we are doing so.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
Documentation/arm64/sme.rst | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/arm64/sme.rst b/Documentation/arm64/sme.rst
index 16d2db4c2e2e..36b08a105dd1 100644
--- a/Documentation/arm64/sme.rst
+++ b/Documentation/arm64/sme.rst
@@ -111,6 +111,9 @@ be zeroed.
* Signal handlers are invoked with streaming mode and ZA disabled.
+* A new signal frame record TPIDR2_MAGIC is added formatted as a struct
+ tpidr2_context to allow access to TPIDR2_EL0 from signal handlers.
+
* A new signal frame record za_context encodes the ZA register contents on
signal delivery. [1]
--
2.30.2
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next prev parent reply other threads:[~2022-10-28 18:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-28 18:50 [PATCH v1 0/4] arm64/signal: Support TPIDR2 Mark Brown
2022-10-28 18:50 ` Mark Brown [this message]
2022-10-28 18:50 ` [PATCH v1 2/4] arm64/signal: Include TPIDR2 in the signal context Mark Brown
2022-10-31 15:05 ` Szabolcs Nagy
2022-10-31 15:34 ` Mark Brown
2022-10-31 15:47 ` Szabolcs Nagy
2022-10-31 15:52 ` Mark Brown
2022-10-28 18:50 ` [PATCH v1 3/4] kselftest/arm64: Add TPIDR2 to the set of known signal context records Mark Brown
2022-10-28 18:50 ` [PATCH v1 4/4] kselftest/arm64: Add test case for TPIDR2 signal frame records Mark Brown
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