From patchwork Tue Dec 5 16:47:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13480420 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 709FC4174B; Tue, 5 Dec 2023 16:51:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cA2ltJ3C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 910E0C433C8; Tue, 5 Dec 2023 16:51:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1701795069; bh=ld1xDDBIxU0aMjeZJcBk8TzmodfOXcQzxXPrqLOm3Wc=; h=From:Subject:Date:To:Cc:From; b=cA2ltJ3Ciu6iOJdi4d9B/ltq2K0G8sHqPxOAvifGX4gGCgc8VemqNpQJTyQayOS0p N1/5z6HA7O21Gy0CuqHBd7MD93z1Fo+yFkhRXrmCNC/lvKfoODEHIqVUwvhFE69Dgb tG9vV1X8YnX4m0mmtEQxHMKnxLhUJsE+pcjSsDohcOakIGGAVKM6QJS7Z2SILPGR3G JvlcRZgctPb3u0CJQhcSm65XFRDhZt8TMfDdTZLN/7ldJR6xQDH14qO/uP70rXh9w9 4dE9Tc0pcvrI2L1UYABYYQPEEaRPYxENcSXqlL1aapvQI9x0D19LRIXkWNdhIy7gnM VqgDaVl/NnV0Q== From: Mark Brown Subject: [PATCH v3 00/21] arm64: Support for 2023 DPISA extensions Date: Tue, 05 Dec 2023 16:47:58 +0000 Message-Id: <20231205-arm64-2023-dpisa-v3-0-dbcbcd867a7f@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=H4sIAD9Ub2UC/23N0QrCIBTG8VcZXmfo8UzdrnqP6MKl26TahoYUY ++eG0FEXf4/OL8zk+iCd5HUxUyCSz76ccghdgU592boHPU2NwEGgjMmqAk3iXRNaicfDYVWWCg VSlRI8tkUXOsfG3k85e59vI/huX1IfF3fGMhfLHHKqEbFrK101TRwuLgwuOt+DB1ZtQQfgXP8I 0AWUEHJdYWtNPpLWJblBSYrTd/zAAAA 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-5c066 X-Developer-Signature: v=1; a=openpgp-sha256; l=4657; i=broonie@kernel.org; h=from:subject:message-id; bh=ld1xDDBIxU0aMjeZJcBk8TzmodfOXcQzxXPrqLOm3Wc=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlb1ToWY21TL2lSFiNFFmpncXHZ+8uv3xdv0x92cWg Iu7GAfWJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZW9U6AAKCRAk1otyXVSH0CTCB/ 9LsWRTj/wZmAWjeHxaGBiu4BElH0V6M0Tohiptgba/9qZblZAxTt7uVj1YC/BTGqiGuGajmHYUQhJ8 X2Bnb/Ttzt20+XlZnVYvaQ547tIUGHQ09wyXuPMfjoacAl/SfDZeP/NQzOBs+mNY2li70oPfvmhTO0 2AmNK9Cq2jKWi/V8mqRw+tyKLV2lmvFGUrpahC8WEV7FgmGWsuH4q8ZeW2jLYA9DGW1WOk0W9W/TtF X05gevBgezfm+zlyxAS6q98+WbF+vcdXfWuKOkWuk0cKnUaViQZDE3EmuVQNJmJ8BiejhePxk5mCxX oXk5q8/Wx4ITOnEhKnMGqweRvTAHc0 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 v3: - Rebase onto v6.7-rc3. - Hook up traps for FPMR in emulate-nested.c. - Link to v2: https://lore.kernel.org/r/20231114-arm64-2023-dpisa-v2-0-47251894f6a8@kernel.org 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/emulate-nested.c | 9 + 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 +- 28 files changed, 819 insertions(+), 18 deletions(-) --- base-commit: 2cc14f52aeb78ce3f29677c2de1f06c0e91471ab change-id: 20231003-arm64-2023-dpisa-2f3d25746474 Best regards,