Re: [PATCH] KVM: PPC: Book3S: fix XIVE migration of pending interrupts

On 12/12/2017 13:02, Cédric Le Goater wrote:

When restoring a pending interrupt, we are setting the Q bit to force
a retrigger in xive_finish_unmask(). But we also need to force an EOI
in this case to reach the same initial state : P=1, Q=0.

This can be done by not setting 'old_p' for pending interrupts which
will inform xive_finish_unmask() that an EOI needs to be sent.

Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---

 Tested with a guest running iozone.

 arch/powerpc/kvm/book3s_xive.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

We really need this patch to fix VM migration on POWER9.
When will it be merged?

Thanks,
Laurent