Re: [PATCH 0/4] KVM: arm64: Support SVE in protected VMs

[Vincent Donnefort]

On Thu, Nov 05, 2026 at 01:04:52PM +0000, Fuad Tabba wrote:
> Hi folks,
> 
> This series adds SVE support for protected VMs. EL2 allocates a
> protected vCPU's SVE state from its own heap rather than pinning the
> host's buffer, so the host never sees the guest's vector registers. It
> then advertises ID_AA64ZFR0_EL1 to protected VMs, and routes the SVE
> trap to the lazy FP switch. The first patch is a small tidy-up of the
> pKVM FP sync code that saves a guest's SVE state.
> 
> v2 of the pKVM selftests series [1] will add a selftest for this.
> 
> Based on Linux 7.4-rc1 (6628e7d4c6b25).
> 
> Cheers,
> /fuad
> 
> [1] https://lore.kernel.org/all/20261104084842.132944-1-fuad.tabba@xxxxxxxxx/
> 
> Fuad Tabba (4):
>   KVM: arm64: Remove redundant kern_hyp_va() calls from the pKVM FP sync
>   KVM: arm64: Allocate a protected vCPU's SVE state at EL2
>   KVM: arm64: Advertise ID_AA64ZFR0_EL1 to protected VMs
>   KVM: arm64: Allow protected VMs to use SVE
> 
>  Documentation/virt/kvm/arm/pkvm.rst |  6 ++---
>  arch/arm64/include/asm/kvm_hyp.h    |  2 ++
>  arch/arm64/include/asm/kvm_pkvm.h   |  1 +
>  arch/arm64/kvm/arm.c                |  1 +
>  arch/arm64/kvm/hyp/nvhe/hyp-main.c  |  4 +--
>  arch/arm64/kvm/hyp/nvhe/pkvm.c      | 41 +++++++++++++++++++----------
>  arch/arm64/kvm/hyp/nvhe/switch.c    |  1 +
>  arch/arm64/kvm/hyp/nvhe/sys_regs.c  | 22 ++++++++++++++--
>  arch/arm64/kvm/reset.c              |  2 ++
>  9 files changed, 59 insertions(+), 21 deletions(-)
> 
> 
> base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
> -- 
> 2.47.3
> 

For the whole series

Reviewed-by: Vincent Donnefort <vdonnefort@xxxxxxxxxx>
Tested-by: Vincent Donnefort <vdonnefort@xxxxxxxxxx>

-- 
Vincent