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Message-ID: <f1cdef31-1427-48ea-a741-a48e8b366093@arm.com>
Date: Fri, 27 Jun 2025 11:37:38 +0100
From: Steven Price <steven.price@....com>
To: "Emi Kisanuki (Fujitsu)" <fj0570is@...itsu.com>,
"'kvm@...r.kernel.org'" <kvm@...r.kernel.org>,
"'kvmarm@...ts.linux.dev'" <kvmarm@...ts.linux.dev>
Cc: '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-arm-kernel@...ts.infradead.org>,
"'linux-kernel@...r.kernel.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'" <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: Re: [PATCH v9 00/43] arm64: Support for Arm CCA in KVM
On 25/06/2025 02:51, Emi Kisanuki (Fujitsu) wrote:
> We tested this patch in our internal simulator which is a hardware simulator for Fujitsu's next generation CPU known as Monaka. and it produced the expected results.
>
> I have verified the following
> 1. Launching the realm VM using Internal simulator -> Successfully launched by disabling MPAM support in the ID register.
> 2. Running kvm-unit-tests (with lkvm) -> All tests passed except for PMU (as expected, since PMU is not supported by the Internal simulator).[1]
>
> Tested-by: Emi Kisanuki <fj0570is@...itsu.com> [1] https://gitlab.arm.com/linux-arm/kvm-unit-tests-cca cca/latest
Thank you for testing!
Regards,
Steve
>
>> 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 v8, many thanks for the review comments. The
>> highlights are below, and individual patches have a changelog.
>>
>> * NV support is now upstream, so this series no longer conflicts.
>>
>> * Tidied up RTT accounting by providing wrapper functions to call
>> kvm_account_pgtable_pages() only when appropriate.
>>
>> * Propagate the 'may_block' flag to enable cond_resched calls only when
>> appropriate.
>>
>> * Reduce code duplication between INIT_RIPAS and SET_RIPAS.
>>
>> * Various code improvements from the reviews - many thanks!
>>
>> * Rebased onto v6.16-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.
>>
>> The ABI to the RMM (the RMI) is based on RMM v1.0-rel0 specification[1].
>>
>> This series is based on v6.16-rc1. It is also available as a git
>> repository:
>>
>> https://gitlab.arm.com/linux-arm/linux-cca cca-host/v9
>>
>> Work in progress changes for kvmtool are available from the git repository below:
>>
>> https://gitlab.arm.com/linux-arm/kvmtool-cca cca/v7
>>
>> [1] https://developer.arm.com/documentation/den0137/1-0rel0/
>>
>> 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 | 94 +-
>> arch/arm64/include/asm/kvm_emulate.h | 40 +
>> arch/arm64/include/asm/kvm_host.h | 17 +-
>> arch/arm64/include/asm/kvm_rme.h | 139 ++
>> arch/arm64/include/asm/rmi_cmds.h | 508 ++++++++
>> arch/arm64/include/asm/rmi_smc.h | 268 ++++
>> 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 | 168 ++-
>> arch/arm64/kvm/guest.c | 108 +-
>> arch/arm64/kvm/hypercalls.c | 4 +-
>> arch/arm64/kvm/inject_fault.c | 5 +-
>> arch/arm64/kvm/mmio.c | 16 +-
>> arch/arm64/kvm/mmu.c | 207 ++-
>> 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 | 207 +++
>> arch/arm64/kvm/rme.c | 1743
>> ++++++++++++++++++++++++++
>> arch/arm64/kvm/sys_regs.c | 53 +-
>> arch/arm64/kvm/vgic/vgic-init.c | 2 +-
>> arch/arm64/kvm/vgic/vgic-v3.c | 6 +-
>> arch/arm64/kvm/vgic/vgic.c | 60 +-
>> 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, 3790 insertions(+), 104 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
>>
>> --
>> 2.43.0
>
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