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>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kselftest@vger.kernel.org, Mark Brown <broonie@kernel.org>
Subject: [PATCH v2 00/21] arm64/sme: Support SME 2 and SME 2.1
Date: Tue, 1 Nov 2022 14:33:15 +0000 [thread overview]
Message-ID: <20221101143336.254445-1-broonie@kernel.org> (raw)
Arm have recently released versions 2 and 2.1 of the SME extension.
Among the features introduced by SME 2 is some new architectural state,
the ZT0 register. This series adds support for this and all the other
features of the new SME versions.
Since the architecture has been designed with the possibility of adding
further ZTn registers in mind the interfaces added for ZT0 are done with
this possibility in mind. As ZT0 is a simple fixed size register these
interfaces are all fairly simple, the main complication is that ZT0 is
only accessible when PSTATE.ZA is enabled. The memory allocation that we
already do for PSTATE.ZA is extended to include space for ZT0.
Due to textual collisions especially around the addition of hwcaps this
is based on the concurrently sent series "arm64: Support for 2022 data
processing instructions" but there is no meaningful interaction.
v2:
- Add missing initialisation of user->zt in signal context parsing.
- Change the magic for ZT signal frames to 0x5a544e01 (ZTN0).
Mark Brown (21):
arm64/sme: Rename za_state to sme_state
arm64: Document boot requirements for SME 2
arm64/sysreg: Update system registers for SME 2 and 2.1
arm64/sme: Document SME 2 and SME 2.1 ABI
arm64/esr: Document ISS for ZT0 being disabled
arm64/sme: Manually encode ZT0 load and store instructions
arm64/sme: Enable host kernel to access ZT0
arm64/sme: Add basic enumeration for SME2
arm64/sme: Provide storage for ZT0
arm64/sme: Implement context switching for ZT0
arm64/sme: Implement signal handling for ZT
arm64/sme: Implement ZT0 ptrace support
arm64/sme: Add hwcaps for SME 2 and 2.1 features
kselftest/arm64: Add a stress test program for ZT0
kselftest/arm64: Cover ZT in the FP stress test
kselftest/arm64: Enumerate SME2 in the signal test utility code
kselftest/arm64: Teach the generic signal context validation about ZT
kselftest/arm64: Add test coverage for ZT register signal frames
kselftest/arm64: Add SME2 coverage to syscall-abi
kselftest/arm64: Add coverage of the ZT ptrace regset
kselftest/arm64: Add coverage of SME 2 and 2.1 hwcaps
Documentation/arm64/booting.rst | 10 +
Documentation/arm64/elf_hwcaps.rst | 18 +
Documentation/arm64/sme.rst | 52 ++-
arch/arm64/include/asm/cpufeature.h | 6 +
arch/arm64/include/asm/esr.h | 1 +
arch/arm64/include/asm/fpsimd.h | 28 +-
arch/arm64/include/asm/fpsimdmacros.h | 22 ++
arch/arm64/include/asm/hwcap.h | 6 +
arch/arm64/include/asm/processor.h | 2 +-
arch/arm64/include/uapi/asm/hwcap.h | 6 +
arch/arm64/include/uapi/asm/sigcontext.h | 19 +
arch/arm64/kernel/cpufeature.c | 27 ++
arch/arm64/kernel/cpuinfo.c | 6 +
arch/arm64/kernel/entry-fpsimd.S | 30 +-
arch/arm64/kernel/fpsimd.c | 53 ++-
arch/arm64/kernel/hyp-stub.S | 6 +
arch/arm64/kernel/idreg-override.c | 1 +
arch/arm64/kernel/process.c | 21 +-
arch/arm64/kernel/ptrace.c | 60 ++-
arch/arm64/kernel/signal.c | 113 +++++-
arch/arm64/tools/cpucaps | 1 +
arch/arm64/tools/sysreg | 26 +-
include/uapi/linux/elf.h | 1 +
tools/testing/selftests/arm64/abi/hwcap.c | 115 ++++++
.../selftests/arm64/abi/syscall-abi-asm.S | 43 ++-
.../testing/selftests/arm64/abi/syscall-abi.c | 40 +-
tools/testing/selftests/arm64/fp/.gitignore | 2 +
tools/testing/selftests/arm64/fp/Makefile | 5 +
tools/testing/selftests/arm64/fp/fp-stress.c | 29 +-
tools/testing/selftests/arm64/fp/sme-inst.h | 20 +
tools/testing/selftests/arm64/fp/zt-ptrace.c | 365 ++++++++++++++++++
tools/testing/selftests/arm64/fp/zt-test.S | 324 ++++++++++++++++
.../testing/selftests/arm64/signal/.gitignore | 1 +
.../selftests/arm64/signal/test_signals.h | 2 +
.../arm64/signal/test_signals_utils.c | 3 +
.../arm64/signal/testcases/testcases.c | 36 ++
.../arm64/signal/testcases/testcases.h | 1 +
.../arm64/signal/testcases/zt_no_regs.c | 51 +++
.../arm64/signal/testcases/zt_regs.c | 85 ++++
39 files changed, 1564 insertions(+), 73 deletions(-)
create mode 100644 tools/testing/selftests/arm64/fp/zt-ptrace.c
create mode 100644 tools/testing/selftests/arm64/fp/zt-test.S
create mode 100644 tools/testing/selftests/arm64/signal/testcases/zt_no_regs.c
create mode 100644 tools/testing/selftests/arm64/signal/testcases/zt_regs.c
base-commit: ab0aff0601c29dc7b5cb2ecf42135dccbed6750a
--
2.30.2
next reply other threads:[~2022-11-01 14:39 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-01 14:33 Mark Brown [this message]
2022-11-01 14:33 ` [PATCH v2 01/21] arm64/sme: Rename za_state to sme_state Mark Brown
2022-11-01 14:33 ` [PATCH v2 02/21] arm64: Document boot requirements for SME 2 Mark Brown
2022-11-01 14:33 ` [PATCH v2 03/21] arm64/sysreg: Update system registers for SME 2 and 2.1 Mark Brown
2022-11-01 14:33 ` [PATCH v2 04/21] arm64/sme: Document SME 2 and SME 2.1 ABI Mark Brown
2022-11-11 10:17 ` Luis Machado
2022-11-11 10:38 ` Luis Machado
2022-11-11 11:20 ` Mark Brown
2022-11-01 14:33 ` [PATCH v2 05/21] arm64/esr: Document ISS for ZT0 being disabled Mark Brown
2022-11-01 14:33 ` [PATCH v2 06/21] arm64/sme: Manually encode ZT0 load and store instructions Mark Brown
2022-11-01 14:33 ` [PATCH v2 07/21] arm64/sme: Enable host kernel to access ZT0 Mark Brown
2022-11-01 14:33 ` [PATCH v2 08/21] arm64/sme: Add basic enumeration for SME2 Mark Brown
2022-11-01 14:33 ` [PATCH v2 09/21] arm64/sme: Provide storage for ZT0 Mark Brown
2022-11-01 14:33 ` [PATCH v2 10/21] arm64/sme: Implement context switching " Mark Brown
2022-11-01 14:33 ` [PATCH v2 11/21] arm64/sme: Implement signal handling for ZT Mark Brown
2022-11-01 14:33 ` [PATCH v2 12/21] arm64/sme: Implement ZT0 ptrace support Mark Brown
2022-11-11 10:31 ` Luis Machado
2022-11-11 11:25 ` Mark Brown
2022-11-01 14:33 ` [PATCH v2 13/21] arm64/sme: Add hwcaps for SME 2 and 2.1 features Mark Brown
2022-11-01 14:33 ` [PATCH v2 14/21] kselftest/arm64: Add a stress test program for ZT0 Mark Brown
2022-11-01 14:33 ` [PATCH v2 15/21] kselftest/arm64: Cover ZT in the FP stress test Mark Brown
2022-11-01 14:33 ` [PATCH v2 16/21] kselftest/arm64: Enumerate SME2 in the signal test utility code Mark Brown
2022-11-01 14:33 ` [PATCH v2 17/21] kselftest/arm64: Teach the generic signal context validation about ZT Mark Brown
2022-11-01 14:33 ` [PATCH v2 18/21] kselftest/arm64: Add test coverage for ZT register signal frames Mark Brown
2022-11-01 14:33 ` [PATCH v2 19/21] kselftest/arm64: Add SME2 coverage to syscall-abi Mark Brown
2022-11-01 14:33 ` [PATCH v2 20/21] kselftest/arm64: Add coverage of the ZT ptrace regset Mark Brown
2022-11-01 14:33 ` [PATCH v2 21/21] kselftest/arm64: Add coverage of SME 2 and 2.1 hwcaps Mark Brown
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