From patchwork Thu Oct 26 12:44:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13437548 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C2E2C25B67 for ; Thu, 26 Oct 2023 12:46:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230330AbjJZMqf (ORCPT ); Thu, 26 Oct 2023 08:46:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54696 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230105AbjJZMqf (ORCPT ); Thu, 26 Oct 2023 08:46:35 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DBA6110E; Thu, 26 Oct 2023 05:46:32 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C53E9C433C7; Thu, 26 Oct 2023 12:46:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1698324392; bh=o9jyzv53TdbTQ/JvbB6Pk8C3vEljuK7P7LZdyPhUN88=; h=From:Subject:Date:To:Cc:From; b=gz6qPi/5JL4iQYlYffY1glVPzhZWf6mcDmcHo2LK6FbvaJIEwSQSiAuZ0q36tug+Y viIGWSww7LN5yP6PggCkyPU1NAAzVWxqbU5PPTX/PRK5uBsYd8QH0a8AOm2dJ9UoNa szNuLjLm6SVwHROLU7bQhHu1zKSVbquQPUdyBPfztrifR0Qb7AdwYvYZrcWNpLtGT4 p+tklhhfLNk3fo2pu0bs/zPh6MgPMgMkHqvDGu4aBaunoXXcsOgzsWqCyio2/BzYsm AcGQ5w2+QgMKxDVNRgdc2hmk7JQQJA76Te4heiZ9go+bnRd2ZKiVXefc8hxW0AulSP FZ7EF5Gcs665w== From: Mark Brown Subject: [PATCH 00/21] arm64: Support for 2023 DPISA extensions Date: Thu, 26 Oct 2023 13:44:14 +0100 Message-Id: <20231026-arm64-2023-dpisa-v1-0-8470dd989bb2@kernel.org> MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAB5fOmUC/x3MTQqAIBBA4avErBvwL4WuEi0kx5pFJgoRRHfPW n6L926oVJgqjN0NhU6ufKQG2XewbD6thByaQQmlpRAafdmtwY8YMlePKuqgBmescQZalgtFvv7 lND/PC71mQf9iAAAA 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=4266; i=broonie@kernel.org; h=from:subject:message-id; bh=o9jyzv53TdbTQ/JvbB6Pk8C3vEljuK7P7LZdyPhUN88=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlOl+UIx/5I6oPhxFmpNY8nGgSlVbxt2/Z5y6RQ2DI 6MU1O5uJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZTpflAAKCRAk1otyXVSH0APsB/ 99XK8I3xOVs2O6LCrgWk38xQ/nVjwx/1RkJCdMy4iAmj+jJGIUWFzRLiY2yFMu6aAyZWtRgwyL5vs7 Tiey4Om12GAwXq2rw142vqUwmoVlfK5ZI9l//AeScOQ20D4ODHuo3ibOC9jGBZBCgZEr9SeapP4A5T O6ZbyPhmybKATmRrTRRWZOszQLrvkHUvNwKhxUcA2ZV8e+bt4WOVCFoUDtIpqJMrSxEa/saZxWB38h j08o8gPZsw16VWtZ5EaMM4x2lbIDOJv2IQinmuzxQMBdQRhbaA9C15Hytw9OOz2bKWwHQEcruE2A3f EQnCBd8FUyX8JjsBH1DLmoFTQwVmZG X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org 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 --- 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: 05d3ef8bba77c1b5f98d941d8b2d4aeab8118ef1 change-id: 20231003-arm64-2023-dpisa-2f3d25746474 Best regards,