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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: Alan Hayward <alan.hayward@arm.com>,
	Luis Machado <luis.machado@arm.com>,
	Salil Akerkar <Salil.Akerkar@arm.com>,
	Basant Kumar Dwivedi <Basant.KumarDwivedi@arm.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, Mark Brown <broonie@kernel.org>,
	Luis Machado <Luis.Machado@arm.com>
Subject: [PATCH v7 03/37] arm64/sve: Minor clarification of ABI documentation
Date: Fri, 10 Dec 2021 18:40:59 +0000	[thread overview]
Message-ID: <20211210184133.320748-4-broonie@kernel.org> (raw)
In-Reply-To: <20211210184133.320748-1-broonie@kernel.org>

As suggested by Luis for the SME version of this explicitly say that the
vector length should be extracted from the return value of a set vector
length prctl() with a bitwise and rather than just any old and.

Suggested-by: Luis Machado <Luis.Machado@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 Documentation/arm64/sve.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/arm64/sve.rst b/Documentation/arm64/sve.rst
index 03137154299e..9d9a4de5bc34 100644
--- a/Documentation/arm64/sve.rst
+++ b/Documentation/arm64/sve.rst
@@ -255,7 +255,7 @@ prctl(PR_SVE_GET_VL)
     vector length change (which would only normally be the case between a
     fork() or vfork() and the corresponding execve() in typical use).
 
-    To extract the vector length from the result, and it with
+    To extract the vector length from the result, bitwise and it with
     PR_SVE_VL_LEN_MASK.
 
     Return value: a nonnegative value on success, or a negative value on error:
-- 
2.30.2


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  parent reply	other threads:[~2021-12-10 18:46 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-10 18:40 [PATCH v7 00/37] arm64/sme: Initial support for the Scalable Matrix Extension Mark Brown
2021-12-10 18:40 ` [PATCH v7 01/37] arm64/sve: Make sysctl interface for SVE reusable by SME Mark Brown
2021-12-10 18:40 ` [PATCH v7 02/37] arm64/sve: Generalise vector length configuration prctl() for SME Mark Brown
2021-12-10 18:40 ` Mark Brown [this message]
2021-12-10 18:41 ` [PATCH v7 04/37] kselftest/arm64: Parameterise ptrace vector length information Mark Brown
2021-12-10 18:41 ` [PATCH v7 05/37] kselftest/arm64: Allow signal tests to trigger from a function Mark Brown
2021-12-10 18:41 ` [PATCH v7 06/37] kselftest/arm64: Add a test program to exercise the syscall ABI Mark Brown
2021-12-10 18:41 ` [PATCH v7 07/37] arm64: cpufeature: Always specify and use a field width for capabilities Mark Brown
2021-12-10 18:41 ` [PATCH v7 08/37] tools/nolibc: Implement gettid() Mark Brown
2021-12-10 18:41 ` [PATCH v7 09/37] arm64/sme: Provide ABI documentation for SME Mark Brown
2021-12-10 18:41 ` [PATCH v7 10/37] arm64/sme: System register and exception syndrome definitions Mark Brown
2021-12-10 18:41 ` [PATCH v7 11/37] arm64/sme: Define macros for manually encoding SME instructions Mark Brown
2021-12-10 18:41 ` [PATCH v7 12/37] arm64/sme: Early CPU setup for SME Mark Brown
2021-12-10 18:41 ` [PATCH v7 13/37] arm64/sme: Basic enumeration support Mark Brown
2021-12-10 18:41 ` [PATCH v7 14/37] arm64/sme: Identify supported SME vector lengths at boot Mark Brown
2021-12-10 18:41 ` [PATCH v7 15/37] arm64/sme: Implement sysctl to set the default vector length Mark Brown
2021-12-10 18:41 ` [PATCH v7 16/37] arm64/sme: Implement vector length configuration prctl()s Mark Brown
2021-12-10 18:41 ` [PATCH v7 17/37] arm64/sme: Implement support for TPIDR2 Mark Brown
2021-12-10 18:41 ` [PATCH v7 18/37] arm64/sme: Implement SVCR context switching Mark Brown
2021-12-10 18:41 ` [PATCH v7 19/37] arm64/sme: Implement streaming SVE " Mark Brown
2021-12-10 18:41 ` [PATCH v7 20/37] arm64/sme: Implement ZA " Mark Brown
2021-12-10 18:41 ` [PATCH v7 21/37] arm64/sme: Implement traps and syscall handling for SME Mark Brown
2021-12-10 18:41 ` [PATCH v7 22/37] arm64/sme: Implement streaming SVE signal handling Mark Brown
2021-12-10 18:41 ` [PATCH v7 23/37] arm64/sme: Implement ZA " Mark Brown
2021-12-10 18:41 ` [PATCH v7 24/37] arm64/sme: Implement ptrace support for streaming mode SVE registers Mark Brown
2021-12-10 18:41 ` [PATCH v7 25/37] arm64/sme: Add ptrace support for ZA Mark Brown
2021-12-10 18:41 ` [PATCH v7 26/37] arm64/sme: Disable streaming mode and ZA when flushing CPU state Mark Brown
2021-12-10 18:41 ` [PATCH v7 27/37] arm64/sme: Save and restore streaming mode over EFI runtime calls Mark Brown
2021-12-10 18:41 ` [PATCH v7 28/37] arm64/sme: Provide Kconfig for SME Mark Brown
2021-12-10 18:41 ` [PATCH v7 29/37] kselftest/arm64: sme: Add streaming SME support to vlset Mark Brown
2021-12-10 18:41 ` [PATCH v7 30/37] kselftest/arm64: Add tests for TPIDR2 Mark Brown
2021-12-10 18:41 ` [PATCH v7 31/37] kselftest/arm64: Extend vector configuration API tests to cover SME Mark Brown
2021-12-10 18:41 ` [PATCH v7 32/37] kselftest/arm64: sme: Provide streaming mode SVE stress test Mark Brown
2021-12-10 18:41 ` [PATCH v7 33/37] kselftest/arm64: Add stress test for SME ZA context switching Mark Brown
2021-12-10 18:41 ` [PATCH v7 34/37] kselftest/arm64: signal: Add SME signal handling tests Mark Brown
2021-12-10 18:41 ` [PATCH v7 35/37] kselftest/arm64: Add streaming SVE to SVE ptrace tests Mark Brown
2021-12-10 18:41 ` [PATCH v7 36/37] kselftest/arm64: Add coverage for the ZA ptrace interface Mark Brown
2021-12-10 18:41 ` [PATCH v7 37/37] kselftest/arm64: Add SME support to syscall ABI test Mark Brown
2021-12-14 19:17 ` (subset) [PATCH v7 00/37] arm64/sme: Initial support for the Scalable Matrix Extension Catalin Marinas
2021-12-14 19:18   ` Catalin Marinas

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