On Tue, 13 Oct 2026 at 11:30, Philippe Mathieu-Daudé <[email protected]> wrote: > > Hi Peter, > > On 13/10/26 10:38, Peter Maydell wrote: > > This patchset adds virtualization support to our GICv5 model, and lets > > the "virt" board use -machine gic-version=x-5,virtualization=on. > > > > Virtualization in the GICv5 is more complicated than it is in GICv3. > > This is because in GICv3 virtualization is mostly delegated to software, > > and only the CPU interface has hardware virtualization support. In > > GICv5 the hardware does a lot more of the work, so virtualization > > support is needed in both the CPU interface and the IRS. > > > > I've structured this patchset as: > > * initial preparatory and bug-fixing patches > > * add virt support to the cpu interface > > * add virt support to the IRS > > * remove the check in virt that stops the user enabling virt > > > > The first 11 patches have been on this list already; I've copied > > across Reviewed-by tags for those patches which got them. > > > > The current spec for the GICv5 is at > > https://support.arm.com/documentation/aes0070/00eac0/ > > Now A.a: https://support.arm.com/documentation/111701/latest
Whoops. I should have checked more carefully the google search result I got back :-) (We do get the URL right in the comments in the code -- we updated it when A.a came out.) > > The kernel support for using GICv5 virtualization is not yet in > > mainline, but it has landed in the kvmarm/next tree: > > https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next > > Similarly kvmtool support to run the inner guest is still work > > in progress, but the tree at > > https://gitlab.arm.com/linux-arm/kvmtool-sb.git gicv5_wip > > will work with the kvmarm/next tree. > > > > This series can pass the kernel's vgic_v5 selftest, and boot an > > inner guest to userspace with kvmtool. > > Could we have a functional test similar to > tests/functional/aarch64/test_kvm.py? kvm-unit-tests currently has no support for GICv5. We should be able to have some kind of functional test eventually, but it will need to wait until the kernel patches at least have hit mainline. thanks -- PMM
