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Message-Id: <20241004152804.72508-1-steven.price@arm.com>
Date: Fri, 4 Oct 2024 16:27:21 +0100
From: Steven Price <steven.price@....com>
To: kvm@...r.kernel.org,
kvmarm@...ts.linux.dev
Cc: Steven Price <steven.price@....com>,
Catalin Marinas <catalin.marinas@....com>,
Marc Zyngier <maz@...nel.org>,
Will Deacon <will@...nel.org>,
James Morse <james.morse@....com>,
Oliver Upton <oliver.upton@...ux.dev>,
Suzuki K Poulose <suzuki.poulose@....com>,
Zenghui Yu <yuzenghui@...wei.com>,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
Joey Gouly <joey.gouly@....com>,
Alexandru Elisei <alexandru.elisei@....com>,
Christoffer Dall <christoffer.dall@....com>,
Fuad Tabba <tabba@...gle.com>,
linux-coco@...ts.linux.dev,
Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
Gavin Shan <gshan@...hat.com>,
Shanker Donthineni <sdonthineni@...dia.com>,
Alper Gun <alpergun@...gle.com>,
"Aneesh Kumar K . V" <aneesh.kumar@...nel.org>
Subject: [PATCH v5 00/43] arm64: Support for Arm CCA in KVM
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. As with the guest this
series moves to the "v1.0-rel0" version of the specification[2].
Almost all changes since v4[3] are either due to rebasing or minor
changes to improve the code following review comments. There are two bug
fixes:
* Setting the GPRS on entry after an exit where the host is allowed to
change registers is now done in kvm_rec_enter(). This fixes a bug
where register updates done by user space were being ignored.
* Drop the PTE_SHARED bit for unprotected page table entries - this bit
isn't controlled by the host and the RMM now enforces the bit is
zero.
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 specification[2].
This series is based on v6.12-rc1. It is also available as a git
repository:
https://gitlab.arm.com/linux-arm/linux-cca cca-host/v5
Work in progress changes for kvmtool are available from the git
repository below:
https://gitlab.arm.com/linux-arm/kvmtool-cca cca/v3
[1] https://lore.kernel.org/r/20241004144307.66199-1-steven.price%40arm.com
[2] https://developer.arm.com/documentation/den0137/1-0rel0/
[3] https://lore.kernel.org/r/20240821153844.60084-1-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 | 510 ++++++++
arch/arm64/include/asm/rmi_smc.h | 255 ++++
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 | 185 ++-
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 | 207 ++++
arch/arm64/kvm/rme.c | 1628 ++++++++++++++++++++++++++
arch/arm64/kvm/sys_regs.c | 83 +-
arch/arm64/kvm/vgic/vgic-v3.c | 8 +-
arch/arm64/kvm/vgic/vgic.c | 41 +-
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, 3569 insertions(+), 101 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
--
2.34.1
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