From 9b88cd7673dddf9336f50540e5735eb6f190200a Mon Sep 17 00:00:00 2001 From: Cédric Le Goater Date: Mon, 13 May 2019 10:42:36 +0200 Subject: spapr/xive: introduce a VM state change handler This handler is in charge of stabilizing the flow of event notifications in the XIVE controller before migrating a guest. This is a requirement before transferring the guest EQ pages to a destination. When the VM is stopped, the handler sets the source PQs to PENDING to stop the flow of events and to possibly catch a triggered interrupt occuring while the VM is stopped. Their previous state is saved. The XIVE controller is then synced through KVM to flush any in-flight event notification and to stabilize the EQs. At this stage, the EQ pages are marked dirty to make sure the EQ pages are transferred if a migration sequence is in progress. The previous configuration of the sources is restored when the VM resumes, after a migration or a stop. If an interrupt was queued while the VM was stopped, the handler simply generates the missing trigger. Signed-off-by: Cédric Le Goater Reviewed-by: David Gibson Message-Id: <20190513084245.25755-6-clg@kaod.org> Signed-off-by: David Gibson --- include/hw/ppc/spapr_xive.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h index 7e49badd8c..734662c12a 100644 --- a/include/hw/ppc/spapr_xive.h +++ b/include/hw/ppc/spapr_xive.h @@ -42,6 +42,7 @@ typedef struct SpaprXive { /* KVM support */ int fd; void *tm_mmap; + VMChangeStateEntry *change; } SpaprXive; /* -- cgit v1.2.3-55-g7522