| Message ID | 20221208-arm64-sme2-v4-0-f2fa0aef982f@kernel.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | arm64/sme: Support SME 2 and SME 2.1 | expand |
On Mon, 16 Jan 2023 16:04:36 +0000, Mark Brown wrote: > 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. > > [...] Applied to arm64 (for-next/sme2), thanks! [01/21] arm64/sme: Rename za_state to sme_state https://git.kernel.org/arm64/c/ce514000da4f [02/21] arm64: Document boot requirements for SME 2 https://git.kernel.org/arm64/c/6dabf1fac6b4 [03/21] arm64/sysreg: Update system registers for SME 2 and 2.1 https://git.kernel.org/arm64/c/0f3bbe0edf78 [04/21] arm64/sme: Document SME 2 and SME 2.1 ABI https://git.kernel.org/arm64/c/4edc11744e8c [05/21] arm64/esr: Document ISS for ZT0 being disabled https://git.kernel.org/arm64/c/8ef55603b8ea [06/21] arm64/sme: Manually encode ZT0 load and store instructions https://git.kernel.org/arm64/c/2cdeecdb9513 [07/21] arm64/sme: Enable host kernel to access ZT0 https://git.kernel.org/arm64/c/f122576f3533 [08/21] arm64/sme: Add basic enumeration for SME2 https://git.kernel.org/arm64/c/d4913eee152d [09/21] arm64/sme: Provide storage for ZT0 https://git.kernel.org/arm64/c/d6138b4adc70 [10/21] arm64/sme: Implement context switching for ZT0 https://git.kernel.org/arm64/c/95fcec713259 [11/21] arm64/sme: Implement signal handling for ZT https://git.kernel.org/arm64/c/ee072cf70804 [12/21] arm64/sme: Implement ZT0 ptrace support https://git.kernel.org/arm64/c/f90b529bcbe5 [13/21] arm64/sme: Add hwcaps for SME 2 and 2.1 features https://git.kernel.org/arm64/c/7d5d8601e457 [14/21] kselftest/arm64: Add a stress test program for ZT0 https://git.kernel.org/arm64/c/1c07425e902c [15/21] kselftest/arm64: Cover ZT in the FP stress test https://git.kernel.org/arm64/c/f63a9f15b2d4 [16/21] kselftest/arm64: Enumerate SME2 in the signal test utility code https://git.kernel.org/arm64/c/638293732608 [17/21] kselftest/arm64: Teach the generic signal context validation about ZT https://git.kernel.org/arm64/c/afe6f1827526 [18/21] kselftest/arm64: Add test coverage for ZT register signal frames https://git.kernel.org/arm64/c/18f8729ab3d5 [19/21] kselftest/arm64: Add SME2 coverage to syscall-abi https://git.kernel.org/arm64/c/49886aa9ab33 [20/21] kselftest/arm64: Add coverage of the ZT ptrace regset https://git.kernel.org/arm64/c/4e1aa1a18f1b [21/21] kselftest/arm64: Add coverage of SME 2 and 2.1 hwcaps https://git.kernel.org/arm64/c/3eb1b41fba97
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 recently merged series "arm64: Support for 2022 data processing instructions" but there is no meaningful interaction. There will be collisions with "arm64/signal: Signal handling cleanups" if that is applied but again not super substantial. v4: - Rebase onto v6.2-rc3. - Add SME2 value to ID_AA64PFR1_EL1.SME and move cpufeature to key off it. - Fix cut'n'paste errors and missing capability in hwcap table. - Fix bitrot in za-test program. - Typo and cut'n'paste fixes. v3: - Rebase onto merged series for the 2022 architectur extensions. - Clarifications and typo fixes in the ABI documentation. v2: - Add missing initialisation of user->zt in signal context parsing. - Change the magic for ZT signal frames to 0x5a544e01 (ZTN0). To: Catalin Marinas <catalin.marinas@arm.com> To: Will Deacon <will@kernel.org> To: Oleg Nesterov <oleg@redhat.com> To: Marc Zyngier <maz@kernel.org> To: James Morse <james.morse@arm.com> To: Alexandru Elisei <alexandru.elisei@arm.com> To: Suzuki K Poulose <suzuki.poulose@arm.com> To: Oliver Upton <oliver.upton@linux.dev> Cc: Alan Hayward <alan.hayward@arm.com> Cc: Luis Machado <luis.machado@arm.com>, Cc: Szabolcs Nagy <szabolcs.nagy@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: kvmarm@lists.linux.dev To: Shuah Khan <shuah@kernel.org> Cc: linux-kselftest@vger.kernel.org --- 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 | 30 +- 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 | 28 ++ arch/arm64/kernel/cpuinfo.c | 6 + arch/arm64/kernel/entry-fpsimd.S | 30 +- arch/arm64/kernel/fpsimd.c | 47 ++- 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/kvm/fpsimd.c | 2 +- arch/arm64/tools/cpucaps | 1 + arch/arm64/tools/sysreg | 27 +- include/uapi/linux/elf.h | 1 + tools/testing/selftests/arm64/abi/hwcap.c | 115 +++++++ .../testing/selftests/arm64/abi/syscall-abi-asm.S | 43 ++- tools/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 | 317 ++++++++++++++++++ tools/testing/selftests/arm64/signal/.gitignore | 1 + .../testing/selftests/arm64/signal/test_signals.h | 2 + .../selftests/arm64/signal/test_signals_utils.c | 3 + .../selftests/arm64/signal/testcases/testcases.c | 36 ++ .../selftests/arm64/signal/testcases/testcases.h | 1 + .../selftests/arm64/signal/testcases/zt_no_regs.c | 51 +++ .../selftests/arm64/signal/testcases/zt_regs.c | 85 +++++ 40 files changed, 1558 insertions(+), 72 deletions(-) --- base-commit: b7bfaa761d760e72a969d116517eaa12e404c262 change-id: 20221208-arm64-sme2-363c27227a32 Best regards,