From patchwork Wed Aug 21 15:38:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 13771783 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A476513A243; Wed, 21 Aug 2024 15:39:08 +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=1724254750; cv=none; b=PIbiE3uNYI88/DJVuPtekW0xUEuG/keFm0sHznsNnJHC+CrEkaVXYkT4gyA/qBMi0fZVGg7G8UMs02qUNLDCz/ISp7fBChKvFK+yCIy5Zpzu5Pz2Uo1oxbaBINjWDxgHKiOXrpNiDunRBocm60BKOTDCfhXU0/CXTAe5IXE0cTU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724254750; c=relaxed/simple; bh=Cmq06yc88KUbQjvW3sBJZKQWcYJ0khTjJ+3FZLoN4gI=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=eRsDE5koViEwftk8gLoE7h+yEsv+eGIp3pc2RGQUJYSVxhFIgXEWG2WoWZuX46xTNmCVT8ACzQUUeLLf072mGHSyYDCHaHu9YGb08q3KZfl5vv+JCcsZUBRyNBAY8/tUqnw7fvALLlZsuMeAvXQain/ItM09zRqAk2eD9rmJTAA= 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 27084DA7; Wed, 21 Aug 2024 08:39:34 -0700 (PDT) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.37.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 178503F73B; Wed, 21 Aug 2024 08:39:03 -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 Subject: [PATCH v4 00/43] arm64: Support for Arm CCA in KVM Date: Wed, 21 Aug 2024 16:38:01 +0100 Message-Id: <20240821153844.60084-1-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 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 posted[1] earlier this week. As mentioned there this version switches to a newer version of the RMM spec (v1.0-rel0-rc1) which involves some (small) binary breaks to the interface so you'll need to upgrade both host and guest kernel (and the RMM) at the same time. The focus has been on the guest side, so there's not much in the way of big changes this time. The changes since v3[3] fit in three categories: 1. Updates caused by the new RMM spec. In particular the 'num_bps' and 'num_wps' fields now match the architectural ID_AA64DFR0_EL1 register which avoids a number +1 and -1s in the code. 2. A bunch of tidy ups handling the cases where kvm is NULL in various places. 3. Misc changes due to rebasing (mostly caused by nested virt support). Major limitations: * Only supports 4k host PAGE_SIZE (if PAGE_SIZE != 4k then the realm extensions are disabled). * No support for huge pages when mapping the guest's pages. There is some 'dead' code left over from before guest_mem was supported. This is partly a current limitation of guest_memfd. The ABI to the RMM (the RMI) is based on RMM v1.0-rel0-rc1 specification[2]. This series is based on v6.11-rc1. It is also available as a git repository: https://gitlab.arm.com/linux-arm/linux-cca cca-host/v4 Work in progress changes for kvmtool are available from the git repository below, these changes are based on Fuad Tabba's repository for pKVM to provide some alignment with the ongoing pKVM work: https://gitlab.arm.com/linux-arm/kvmtool-cca cca/v2 [1] https://lore.kernel.org/r/20240819131924.372366-1-steven.price%40arm.com [2] https://developer.arm.com/-/cdn-downloads/permalink/PDF/Architectures/DEN0137_1.0-rel0-rc1_rmm-arch_external.pdf [3] https://lore.kernel.org/r/20240610134202.54893-1-steven.price%40arm.com 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 Sean Christopherson (1): KVM: Prepare for handling only shared mappings in mmu_notifier events Steven Price (29): 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 arm64: kvm: Allow passing machine type in KVM creation arm64: RME: Keep a spare page delegated to the RMM arm64: RME: RTT tear down arm64: RME: Allocate/free RECs to match vCPUs 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 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 kvm: rme: Hide KVM_CAP_READONLY_MEM for realm guests arm64: kvm: Expose support for private memory KVM: arm64: Allow activating realms Suzuki K Poulose (4): kvm: arm64: pgtable: Track the number of pages in the entry level kvm: arm64: Include kvm_emulate.h in kvm/arm_psci.h kvm: arm64: Expose debug HW register numbers for Realm arm64: rme: Allow checking SVE on VM instance Documentation/virt/kvm/api.rst | 3 + arch/arm64/include/asm/kvm_emulate.h | 34 + arch/arm64/include/asm/kvm_host.h | 16 +- arch/arm64/include/asm/kvm_pgtable.h | 2 + arch/arm64/include/asm/kvm_rme.h | 155 +++ arch/arm64/include/asm/rmi_cmds.h | 508 ++++++++ arch/arm64/include/asm/rmi_smc.h | 253 ++++ 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 | 45 +- arch/arm64/kvm/arm.c | 166 ++- arch/arm64/kvm/guest.c | 99 +- arch/arm64/kvm/hyp/pgtable.c | 5 +- arch/arm64/kvm/hypercalls.c | 4 +- arch/arm64/kvm/inject_fault.c | 2 + arch/arm64/kvm/mmio.c | 10 +- arch/arm64/kvm/mmu.c | 181 ++- arch/arm64/kvm/pmu-emul.c | 7 +- arch/arm64/kvm/psci.c | 29 + arch/arm64/kvm/reset.c | 23 +- arch/arm64/kvm/rme-exit.c | 212 ++++ arch/arm64/kvm/rme.c | 1620 ++++++++++++++++++++++++++ arch/arm64/kvm/sys_regs.c | 83 +- arch/arm64/kvm/vgic/vgic-v3.c | 8 +- arch/arm64/kvm/vgic/vgic.c | 37 +- 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/kvm_host.h | 2 + include/linux/perf/arm_pmu.h | 5 + include/uapi/linux/kvm.h | 31 +- virt/kvm/kvm_main.c | 7 + 36 files changed, 3555 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