From patchwork Wed Apr 16 13:41:22 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 14053965 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id CE8531A23B0; Wed, 16 Apr 2025 13:43:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744811008; cv=none; b=tZGnasikt4XTr+6we0P9a+XTWs+b7Qv+MpcFKJB3yEwuDbH4KPCdgkIleM5Jo49i+9Z/mZv8SENwG64yQ+MrObyYbi8cPsKD4OEVIdWTBbyodsdbH25+cyy5TL1p0xw3IhVtwP6e0EL0CKOiLfswF3rHbEpWY3WQXVif4ihghFM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744811008; c=relaxed/simple; bh=uZrx/R+c96B6f1yZ874Z3PH13AxzGewggazq0D+ga7A=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Ksnxp033dbQCw8Z6A+sFsXSxdhnjtz9cwVSh95th+RU3OOeCMH3eZN2l6Fam3IQ4Rx0ifPrWXV5mbiSoKV2JYV2kc4qu57C5oXPqkn33FczlGy6B4iSoyzP0IO+f3fF/qN3W+SF87TfbqMuSZv7TkkquFF9yl+Ey98nElF9+l3M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 56EED1595; Wed, 16 Apr 2025 06:43:22 -0700 (PDT) Received: from e122027.arm.com (unknown [10.57.90.52]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B111A3F59E; Wed, 16 Apr 2025 06:43:19 -0700 (PDT) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Steven Price , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Gavin Shan , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" Subject: [PATCH v8 00/43] arm64: Support for Arm CCA in KVM Date: Wed, 16 Apr 2025 14:41:22 +0100 Message-ID: <20250416134208.383984-1-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This series adds support for running protected VMs using KVM under the Arm Confidential Compute Architecture (CCA). The related guest support was merged for v6.14-rc1 so you no longer need that separately. There are a few changes since v7, many thanks for the review comments. The highlights are below, and individual patches have a changelog. * More documentation - the new ioctls and capabilties are now all documented. * Initial patch adding "only_private"/"only_shared" to struct kvm_gfn_range replaced with already upstream "attr_filter". * Improvement in variable naming and error codes, and some improved/new comments. All following valuable review feedback (thanks!). * Drop the final WIP patch for enabling large PAGE_SIZE support. It's not ready for merging and I want to focus on landing the 4k support. * Rebased onto v6.15-rc1. Things to note: * The magic numbers for capabilities and ioctls have been updated. So you'll need to update your VMM. See below for update kvmtool branch. * Patch 42 increases KVM_VCPU_MAX_FEATURES to expose the new feature. This also exposes the NV features (as they are currently numbered lower). This will resolve when Marc's NV series has landed, see [2]. * There are some conflicts with v6.15-rc2, mostly documentation, but also commit 26fbdf369227 ("KVM: arm64: Don't translate FAR if invalid/unsafe") 'hijacks' HPFAR_EL2_NS as a valid bit. This will require corresponding changes to the CCA code. The ABI to the RMM (the RMI) is based on RMM v1.0-rel0 specification[1]. This series is based on v6.15-rc1. It is also available as a git repository: https://gitlab.arm.com/linux-arm/linux-cca cca-host/v8 Work in progress changes for kvmtool are available from the git repository below: https://gitlab.arm.com/linux-arm/kvmtool-cca cca/v6 [1] https://developer.arm.com/documentation/den0137/1-0rel0/ [2] https://lore.kernel.org/r/20250408105225.4002637-17-maz%40kernel.org Jean-Philippe Brucker (7): arm64: RME: Propagate number of breakpoints and watchpoints to userspace arm64: RME: Set breakpoint parameters through SET_ONE_REG arm64: RME: Initialize PMCR.N with number counter supported by RMM arm64: RME: Propagate max SVE vector length from RMM arm64: RME: Configure max SVE vector length for a Realm arm64: RME: Provide register list for unfinalized RME RECs arm64: RME: Provide accurate register list Joey Gouly (2): arm64: RME: allow userspace to inject aborts arm64: RME: support RSI_HOST_CALL Steven Price (31): arm64: RME: Handle Granule Protection Faults (GPFs) arm64: RME: Add SMC definitions for calling the RMM arm64: RME: Add wrappers for RMI calls arm64: RME: Check for RME support at KVM init arm64: RME: Define the user ABI arm64: RME: ioctls to create and configure realms KVM: arm64: Allow passing machine type in KVM creation arm64: RME: RTT tear down arm64: RME: Allocate/free RECs to match vCPUs KVM: arm64: vgic: Provide helper for number of list registers arm64: RME: Support for the VGIC in realms KVM: arm64: Support timers in realm RECs arm64: RME: Allow VMM to set RIPAS arm64: RME: Handle realm enter/exit arm64: RME: Handle RMI_EXIT_RIPAS_CHANGE KVM: arm64: Handle realm MMIO emulation arm64: RME: Allow populating initial contents arm64: RME: Runtime faulting of memory KVM: arm64: Handle realm VCPU load KVM: arm64: Validate register access for a Realm VM KVM: arm64: Handle Realm PSCI requests KVM: arm64: WARN on injected undef exceptions arm64: Don't expose stolen time for realm guests arm64: RME: Always use 4k pages for realms arm64: RME: Prevent Device mappings for Realms arm_pmu: Provide a mechanism for disabling the physical IRQ arm64: RME: Enable PMU support with a realm guest arm64: RME: Hide KVM_CAP_READONLY_MEM for realm guests KVM: arm64: Expose support for private memory KVM: arm64: Expose KVM_ARM_VCPU_REC to user space KVM: arm64: Allow activating realms Suzuki K Poulose (3): kvm: arm64: Include kvm_emulate.h in kvm/arm_psci.h kvm: arm64: Don't expose debug capabilities for realm guests arm64: RME: Allow checking SVE on VM instance Documentation/virt/kvm/api.rst | 91 +- arch/arm64/include/asm/kvm_emulate.h | 40 + arch/arm64/include/asm/kvm_host.h | 17 +- arch/arm64/include/asm/kvm_rme.h | 137 +++ arch/arm64/include/asm/rmi_cmds.h | 508 ++++++++ arch/arm64/include/asm/rmi_smc.h | 259 ++++ arch/arm64/include/asm/virt.h | 1 + arch/arm64/include/uapi/asm/kvm.h | 49 + arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/Makefile | 3 +- arch/arm64/kvm/arch_timer.c | 48 +- arch/arm64/kvm/arm.c | 160 ++- arch/arm64/kvm/guest.c | 104 +- arch/arm64/kvm/hypercalls.c | 4 +- arch/arm64/kvm/inject_fault.c | 5 +- arch/arm64/kvm/mmio.c | 16 +- arch/arm64/kvm/mmu.c | 201 ++- arch/arm64/kvm/pmu-emul.c | 6 + arch/arm64/kvm/psci.c | 30 + arch/arm64/kvm/reset.c | 23 +- arch/arm64/kvm/rme-exit.c | 199 +++ arch/arm64/kvm/rme.c | 1708 ++++++++++++++++++++++++++ arch/arm64/kvm/sys_regs.c | 49 +- arch/arm64/kvm/vgic/vgic-init.c | 2 +- arch/arm64/kvm/vgic/vgic-v3.c | 6 +- arch/arm64/kvm/vgic/vgic.c | 54 +- arch/arm64/mm/fault.c | 31 +- drivers/perf/arm_pmu.c | 15 + include/kvm/arm_arch_timer.h | 2 + include/kvm/arm_pmu.h | 4 + include/kvm/arm_psci.h | 2 + include/linux/perf/arm_pmu.h | 5 + include/uapi/linux/kvm.h | 29 +- 33 files changed, 3709 insertions(+), 100 deletions(-) create mode 100644 arch/arm64/include/asm/kvm_rme.h create mode 100644 arch/arm64/include/asm/rmi_cmds.h create mode 100644 arch/arm64/include/asm/rmi_smc.h create mode 100644 arch/arm64/kvm/rme-exit.c create mode 100644 arch/arm64/kvm/rme.c