From: Mark Brown <broonie@kernel.org> To: Will Deacon <will@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com>, Shuah Khan <skhan@linuxfoundation.org>, Shuah Khan <shuah@kernel.org>, 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 Subject: Re: [PATCH v2 04/42] arm64/sve: Make access to FFR optional Date: Tue, 19 Oct 2021 14:17:25 +0100 [thread overview] Message-ID: <YW7FZf5FxGJJV2XY@sirena.org.uk> (raw) In-Reply-To: <20211019101447.GA13251@willie-the-truck> [-- Attachment #1: Type: text/plain, Size: 394 bytes --] On Tue, Oct 19, 2021 at 11:14:47AM +0100, Will Deacon wrote: > > -1: sve_flush_p_ffr > > +1: cbz x0, 2f > > + sve_flush_p > > +2: sve_flush_ffr > > ret > I'm confused by this -- x0 seems to control whether or not we flush the > predicate registers rather then ffr. Yes, that's buggy - it got broken with rebasing for skipping the Z register flush. Thanks for spotting, sorry about that. [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 488 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org> To: Will Deacon <will@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com>, Shuah Khan <skhan@linuxfoundation.org>, Shuah Khan <shuah@kernel.org>, 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 Subject: Re: [PATCH v2 04/42] arm64/sve: Make access to FFR optional Date: Tue, 19 Oct 2021 14:17:25 +0100 [thread overview] Message-ID: <YW7FZf5FxGJJV2XY@sirena.org.uk> (raw) In-Reply-To: <20211019101447.GA13251@willie-the-truck> [-- Attachment #1.1: Type: text/plain, Size: 394 bytes --] On Tue, Oct 19, 2021 at 11:14:47AM +0100, Will Deacon wrote: > > -1: sve_flush_p_ffr > > +1: cbz x0, 2f > > + sve_flush_p > > +2: sve_flush_ffr > > ret > I'm confused by this -- x0 seems to control whether or not we flush the > predicate registers rather then ffr. Yes, that's buggy - it got broken with rebasing for skipping the Z register flush. Thanks for spotting, sorry about that. [-- Attachment #1.2: signature.asc --] [-- Type: application/pgp-signature, Size: 488 bytes --] [-- Attachment #2: Type: text/plain, Size: 176 bytes --] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-10-19 13:17 UTC|newest] Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-18 19:08 [PATCH v2 00/42] arm64/sme: Initial support for the Scalable Matrix Extension Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 01/42] arm64/fp: Reindent fpsimd_save() Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 02/42] arm64/sve: Remove sve_load_from_fpsimd_state() Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 03/42] arm64/sve: Make sve_state_size() static Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 04/42] arm64/sve: Make access to FFR optional Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-19 10:14 ` Will Deacon 2021-10-19 10:14 ` Will Deacon 2021-10-19 13:17 ` Mark Brown [this message] 2021-10-19 13:17 ` Mark Brown 2021-10-19 14:39 ` Mark Rutland 2021-10-19 14:39 ` Mark Rutland 2021-10-19 15:31 ` Mark Brown 2021-10-19 15:31 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 05/42] arm64/sve: Rename find_supported_vector_length() Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 06/42] arm64/sve: Use accessor functions for vector lengths in thread_struct Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 07/42] arm64/sve: Put system wide vector length information into structs Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 08/42] arm64/sve: Explicitly load vector length when restoring SVE state Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 09/42] arm64/sve: Track vector lengths for tasks in an array Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 10/42] arm64/sve: Make sysctl interface for SVE reusable by SME Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 11/42] arm64/sve: Generalise vector length configuration prctl() for SME Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 12/42] kselftest/arm64: Parameterise ptrace vector length information Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 13/42] kselftest/arm64: Allow signal tests to trigger from a function Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 14/42] tools/nolibc: Implement gettid() Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-19 5:06 ` Willy Tarreau 2021-10-19 5:06 ` Willy Tarreau 2021-10-18 19:08 ` [PATCH v2 15/42] arm64/sme: Provide ABI documentation for SME Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 16/42] arm64/sme: System register and exception syndrome definitions Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 17/42] arm64/sme: Define macros for manually encoding SME instructions Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 18/42] arm64/sme: Early CPU setup for SME Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 19/42] arm64/sme: Basic enumeration support Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 20/42] arm64/sme: Identify supported SME vector lengths at boot Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 21/42] arm64/sme: Implement sysctl to set the default vector length Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 22/42] arm64/sme: Implement vector length configuration prctl()s Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 23/42] arm64/sme: Implement support for TPIDR2 Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 24/42] arm64/sme: Implement SVCR context switching Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 25/42] arm64/sme: Implement streaming SVE " Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 26/42] arm64/sme: Implement ZA " Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 27/42] arm64/sme: Implement traps and syscall handling for SME Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 28/42] arm64/sme: Implement streaming SVE signal handling Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 29/42] arm64/sme: Implement ZA " Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 30/42] arm64/sme: Implement ptrace support for streaming mode SVE registers Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 31/42] arm64/sme: Add ptrace support for ZA Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 32/42] arm64/sme: Disable streaming mode and ZA when flushing CPU state Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 33/42] arm64/sme: Save and restore streaming mode over EFI runtime calls Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 34/42] arm64/sme: Provide Kconfig for SME Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 35/42] kselftest/arm64: sme: Add streaming SME support to vlset Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 36/42] kselftest/arm64: Add tests for TPIDR2 Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 37/42] kselftest/arm64: Extend vector configuration API tests to cover SME Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 38/42] kselftest/arm64: sme: Provide streaming mode SVE stress test Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 39/42] kselftest/arm64: Add stress test for SME ZA context switching Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 40/42] kselftest/arm64: signal: Add SME signal handling tests Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 41/42] kselftest/arm64: Add streaming SVE to SVE ptrace tests Mark Brown 2021-10-18 19:08 ` Mark Brown 2021-10-18 19:08 ` [PATCH v2 42/42] kselftest/arm64: Add coverage for the ZA ptrace interface Mark Brown 2021-10-18 19:08 ` Mark Brown
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