From patchwork Tue Nov 14 14:34:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 743909 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 86A8F4121A; Tue, 14 Nov 2023 14:35:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="oFw4c/Ul" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5CC7AC433C7; Tue, 14 Nov 2023 14:35:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699972521; bh=k9tklrd9CUW37pCy5xazKSbSEX1KKx7gXJfVBAQsxno=; h=From:Subject:Date:To:Cc:From; b=oFw4c/UlqT1y280OJKCojnhsWb5J0NHo8uViuJ8Mi95M2FKPfd3BKqh1LmGjtm8jt YGCAnaXKKZg1/DehIjEzijXXa9nu2qhZefv2FFE0YORwMFRo/RCt4T/KCVLln5uhJM cs4HioJBS6oErQTURw2IAbiZeZrWVAdtUfjZ+GxE4uW5a0uC0BuALwhyXexBn0EXgN vPhNEd5da+M7jEWxE9Xw5JJClEEd5R/HDTcLHQyW4S3dDH+YxAZV14LtZIYKGuQi6Y IWJjorv2mk+XJ+T6sUg/0RVlB7T/HcRvmzhFaeOOcwJK9wb0+bLr+8rELFq0WhkOpz X2bSD5Zh68/gQ== From: Mark Brown Subject: [PATCH v2 00/21] arm64: Support for 2023 DPISA extensions Date: Tue, 14 Nov 2023 14:34:45 +0000 Message-Id: <20231114-arm64-2023-dpisa-v2-0-47251894f6a8@kernel.org> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAIaFU2UC/2XNTQ6CQAyG4auQrq0ZysiPK+9hWIBToFEZ0jFEQ 7i7A3Hn8vmSvl0gsAoHOCcLKM8SxI8RdEjgNjRjzyguGshQlhqTYaPP3OJGdJOEBqnLHJ0Km9v CQjyblDt578lrHT1IeHn97B/mdFt/Mcr/Y3OKBktbGOeqsmpbutxZR34cvfZQr+v6BRyay4OxA AAA To: Catalin Marinas , Will Deacon , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Jonathan Corbet , Shuah Khan Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-0438c X-Developer-Signature: v=1; a=openpgp-sha256; l=4410; i=broonie@kernel.org; h=from:subject:message-id; bh=k9tklrd9CUW37pCy5xazKSbSEX1KKx7gXJfVBAQsxno=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlU4WUt+WiT6txaa4pxL7WEh963NJouUROCwfprTjL PYsyg7yJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZVOFlAAKCRAk1otyXVSH0JfpB/ 4ttQ8AjvZQxXTnoDNK6E2YDQipxqaTVWF1Sk0ZmnSApAeGKuPaSKm6FXkONbNHFttJgE7+oe/OsWGh vdLib5GBnzgqfoLUuYbHPOUHsYT4nw03C170xuEOs16eqEbHCaHSLqnFGL9NfYn9xWt8ZkIRex/Cex q5M/pVRRpi3gcVI6FJluYoPEJCGfCjDOHuZ5ZXZkGDIbWatF/39HuobHQAAK/4tFGNtidf5OBnXUNn aJgmc+Aon9SApW3lKxZ+5oCiW+u0uTlCd5yTOeZIKHQ8CwnrUPTZjLqWlN+CRSfidJeAWAZLOFeNs9 ayFKtY87CcbaGc950CdfDkjTw/mDNb X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB This series enables support for the data processing extensions in the newly released 2023 architecture, this is mainly support for 8 bit floating point formats. Most of the extensions only introduce new instructions and therefore only require hwcaps but there is a new EL0 visible control register FPMR used to control the 8 bit floating point formats, we need to manage traps for this and context switch it. The sharing of floating point save code between the host and guest kernels slightly complicates the introduction of KVM support, we first introduce host support with some placeholders for KVM then replace those with the actual KVM support. I've not added test coverage for ptrace, I've got a not quite finished test program which exercises all the FP ptrace interfaces and their interactions together, my plan is to cover it there rather than add another tiny test program that duplicates the boilerplace for tracing a target and doesn't actually run the traced program. Signed-off-by: Mark Brown --- Changes in v2: - Rebase onto v6.7-rc1. - Link to v1: https://lore.kernel.org/r/20231026-arm64-2023-dpisa-v1-0-8470dd989bb2@kernel.org --- Mark Brown (21): arm64/sysreg: Add definition for ID_AA64PFR2_EL1 arm64/sysreg: Update ID_AA64ISAR2_EL1 defintion for DDI0601 2023-09 arm64/sysreg: Add definition for ID_AA64ISAR3_EL1 arm64/sysreg: Add definition for ID_AA64FPFR0_EL1 arm64/sysreg: Update ID_AA64SMFR0_EL1 definition for DDI0601 2023-09 arm64/sysreg: Update SCTLR_EL1 for DDI0601 2023-09 arm64/sysreg: Update HCRX_EL2 definition for DDI0601 2023-09 arm64/sysreg: Add definition for FPMR arm64/cpufeature: Hook new identification registers up to cpufeature arm64/fpsimd: Enable host kernel access to FPMR arm64/fpsimd: Support FEAT_FPMR arm64/signal: Add FPMR signal handling arm64/ptrace: Expose FPMR via ptrace KVM: arm64: Add newly allocated ID registers to register descriptions KVM: arm64: Support FEAT_FPMR for guests arm64/hwcap: Define hwcaps for 2023 DPISA features kselftest/arm64: Handle FPMR context in generic signal frame parser kselftest/arm64: Add basic FPMR test kselftest/arm64: Add 2023 DPISA hwcap test coverage KVM: arm64: selftests: Document feature registers added in 2023 extensions KVM: arm64: selftests: Teach get-reg-list about FPMR Documentation/arch/arm64/elf_hwcaps.rst | 49 +++++ arch/arm64/include/asm/cpu.h | 3 + arch/arm64/include/asm/cpufeature.h | 5 + arch/arm64/include/asm/fpsimd.h | 2 + arch/arm64/include/asm/hwcap.h | 15 ++ arch/arm64/include/asm/kvm_arm.h | 4 +- arch/arm64/include/asm/kvm_host.h | 3 + arch/arm64/include/asm/processor.h | 2 + arch/arm64/include/uapi/asm/hwcap.h | 15 ++ arch/arm64/include/uapi/asm/sigcontext.h | 8 + arch/arm64/kernel/cpufeature.c | 72 +++++++ arch/arm64/kernel/cpuinfo.c | 18 ++ arch/arm64/kernel/fpsimd.c | 13 ++ arch/arm64/kernel/ptrace.c | 42 ++++ arch/arm64/kernel/signal.c | 59 ++++++ arch/arm64/kvm/fpsimd.c | 19 +- arch/arm64/kvm/hyp/include/hyp/switch.h | 7 +- arch/arm64/kvm/sys_regs.c | 17 +- arch/arm64/tools/cpucaps | 1 + arch/arm64/tools/sysreg | 153 ++++++++++++++- include/uapi/linux/elf.h | 1 + tools/testing/selftests/arm64/abi/hwcap.c | 217 +++++++++++++++++++++ tools/testing/selftests/arm64/signal/.gitignore | 1 + .../arm64/signal/testcases/fpmr_siginfo.c | 82 ++++++++ .../selftests/arm64/signal/testcases/testcases.c | 8 + .../selftests/arm64/signal/testcases/testcases.h | 1 + tools/testing/selftests/kvm/aarch64/get-reg-list.c | 11 +- 27 files changed, 810 insertions(+), 18 deletions(-) --- base-commit: b85ea95d086471afb4ad062012a4d73cd328fa86 change-id: 20231003-arm64-2023-dpisa-2f3d25746474 Best regards,