Re: [RFC PATCH 0/5] QEMU v7.2.0 aarch64 Nested Virtualization Support

[Eric Auger <eauger@redhat.com>]

Hi Miguel,

On 2/8/24 18:33, Miguel Luis wrote:
> Hi Eric,
> 
>> On 8 Feb 2024, at 15:55, Eric Auger <eauger@redhat.com> wrote:
>>
>> Hi Miguel,
>>
>> On 2/27/23 17:37, Miguel Luis wrote:
>>> This series adds ARMv8.3/8.4 nested virtualization support in KVM mode.
>>>
>>> To enable nested virtualization for a guest, the host must expose EL2
>>> support via QEMU command line switches:
>>>
>>> -machine virt,accel=kvm,virtualization=on
>>>
>>> Inspired on Haibo Xu's previous work [0][1], Marc Zyngier's kvmtool branch [2]
>>> and kernel patches [3] on nested virtualization for aarch64, this has been
>>> tested on an Ampere implementation.
>>>
>>> This series adapts previous work on top of v7.2.0, it considers comments given
>>> at the time and preserves authorship of the original patches.
>>>
>>> [0]: https://lore.kernel.org/qemu-devel/cover.1616052889.git.haibo.xu@linaro.org/
>>> [1]: https://lore.kernel.org/qemu-devel/cover.1617281290.git.haibo.xu@linaro.org/
>>> [2]: https://git.kernel.org/pub/scm/linux/kernel/git/maz/kvmtool.git/log/?h=arm64/nv-5.16
>>> [3]: https://lore.kernel.org/linux-arm-kernel/20230131092504.2880505-1-maz@kernel.org/
>>
>> I rebased the series on top of v8.2. I was able to boot some L2 guests
>> with it, although it still does not work with guests featuring edk2.
>>
>> Do you plan to send a respin or may I do?
>>
> 
> I do not have a short-term respin planned.
> Please, feel free to do.

OK thanks. I will send it tomorrow.

Eric
> 
> Thanks
> 
> Miguel
> 
>> Thanks
>>
>> Eric
>>>
>>> Miguel Luis (5):
>>>  linux-headers: [kvm,arm64] add the necessary definitions to match host
>>>    kernel
>>>  hw/intc/gicv3: add support for setting KVM vGIC maintenance IRQ
>>>  target/arm/kvm: add helper to detect EL2 when using KVM
>>>  target/arm: enable feature ARM_FEATURE_EL2 if EL2 is supported
>>>  arm/virt: provide virtualization extensions to the guest
>>>
>>> hw/arm/virt.c                      |  8 +++++++-
>>> hw/intc/arm_gicv3_common.c         |  1 +
>>> hw/intc/arm_gicv3_kvm.c            | 25 +++++++++++++++++++++++++
>>> include/hw/intc/arm_gicv3_common.h |  1 +
>>> linux-headers/asm-arm64/kvm.h      |  2 ++
>>> linux-headers/linux/kvm.h          |  1 +
>>> target/arm/cpu.h                   |  2 +-
>>> target/arm/kvm64.c                 | 21 +++++++++++++++++++++
>>> target/arm/kvm_arm.h               | 12 ++++++++++++
>>> 9 files changed, 71 insertions(+), 2 deletions(-)
> 
>