Marc,
That's good news. Can I assume you'd keep the
KVM_DEV_ARM_VGIC_GRP_ADDR_OFFSET attribute, or would you introduce new
ones? I ask because either way we need the userland support, be it QEMU
or kvmtool. I'm carrying the small QEMU patch at this moment.
On 7/1/16 5:40 PM, Marc Zyngier wrote:
Itaru,
On 01/07/16 05:57, Itaru Kitayama wrote:
This is merely an update to the patch Marc posted in 2014:
https://lists.cs.columbia.edu/pipermail/kvmarm/2014-June/010055.html
This updated patch is against today's current kvmarm git tree tag,
kvm-for-arm-v4.7-rc6.
The GIC CPU interface is always 4k aligned. If the host is using
64k pages, it is critical to place the guest's GICC interface at the
same relative alignment as the host's GICV. Failure to do so results
in an impossibility for the guest to deal with interrupts.
Add a KVM_DEV_ARM_VGIC_GRP_ADDR_OFFSET attribute for the VGIC, allowing
userspace to retrieve the GICV offset in a page. It becomes then trivial
to adjust the GICC base address for the guest.
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx <https://lists.cs.columbia.edu/mailman/listinfo/kvmarm>>
Signed-off-by: Itaru Kitayama <itaru.kitayama@xxxxxxxx>
I'm working on a much more complete patch series that deals with this
and a bit more. Hopefully for the 4.9 time frame.
Thanks,
M.
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