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authorEric Auger <eric.auger@redhat.com>2017-06-13 14:57:01 +0100
committerPeter Maydell <peter.maydell@linaro.org>2017-06-13 14:57:01 +0100
commit252a7a6a968c279a4636a86b0559ba3a930a90b5 (patch)
tree0a4541cb97b68144202c69d16dd6921ebde8c711
parentd5aa0c229ab5d46c1a4ff497553671cd46486749 (diff)
downloadqemu-arm-252a7a6a968c279a4636a86b0559ba3a930a90b5.tar.gz
hw/intc/arm_gicv3_its: Allow save/restorepull-target-arm-20170613
We change the restoration priority of both the GICv3 and ITS. The GICv3 must be restored before the ITS and the ITS needs to be restored before PCIe devices since it translates their MSI transactions. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-id: 1497023553-18411-5-git-send-email-eric.auger@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--hw/intc/arm_gicv3_common.c1
-rw-r--r--hw/intc/arm_gicv3_its_common.c2
-rw-r--r--hw/intc/arm_gicv3_its_kvm.c24
-rw-r--r--include/migration/vmstate.h2
4 files changed, 16 insertions, 13 deletions
diff --git a/hw/intc/arm_gicv3_common.c b/hw/intc/arm_gicv3_common.c
index c6493d6c07..4228b7ca00 100644
--- a/hw/intc/arm_gicv3_common.c
+++ b/hw/intc/arm_gicv3_common.c
@@ -145,6 +145,7 @@ static const VMStateDescription vmstate_gicv3 = {
.minimum_version_id = 1,
.pre_save = gicv3_pre_save,
.post_load = gicv3_post_load,
+ .priority = MIG_PRI_GICV3,
.fields = (VMStateField[]) {
VMSTATE_UINT32(gicd_ctlr, GICv3State),
VMSTATE_UINT32_ARRAY(gicd_statusr, GICv3State, 2),
diff --git a/hw/intc/arm_gicv3_its_common.c b/hw/intc/arm_gicv3_its_common.c
index 696c11ca13..68b20fccd1 100644
--- a/hw/intc/arm_gicv3_its_common.c
+++ b/hw/intc/arm_gicv3_its_common.c
@@ -48,7 +48,7 @@ static const VMStateDescription vmstate_its = {
.name = "arm_gicv3_its",
.pre_save = gicv3_its_pre_save,
.post_load = gicv3_its_post_load,
- .unmigratable = true,
+ .priority = MIG_PRI_GICV3_ITS,
.fields = (VMStateField[]) {
VMSTATE_UINT32(ctlr, GICv3ITSState),
VMSTATE_UINT32(iidr, GICv3ITSState),
diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
index 4cd8f5f44c..1f8991b8a6 100644
--- a/hw/intc/arm_gicv3_its_kvm.c
+++ b/hw/intc/arm_gicv3_its_kvm.c
@@ -85,18 +85,6 @@ static void kvm_arm_its_realize(DeviceState *dev, Error **errp)
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
Error *local_err = NULL;
- /*
- * Block migration of a KVM GICv3 ITS device: the API for saving and
- * restoring the state in the kernel is not yet available
- */
- error_setg(&s->migration_blocker, "vITS migration is not implemented");
- migrate_add_blocker(s->migration_blocker, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- error_free(s->migration_blocker);
- return;
- }
-
s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_ITS, false);
if (s->dev_fd < 0) {
error_setg_errno(errp, -s->dev_fd, "error creating in-kernel ITS");
@@ -113,6 +101,18 @@ static void kvm_arm_its_realize(DeviceState *dev, Error **errp)
gicv3_its_init_mmio(s, NULL);
+ if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
+ GITS_CTLR)) {
+ error_setg(&s->migration_blocker, "This operating system kernel "
+ "does not support vITS migration");
+ migrate_add_blocker(s->migration_blocker, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ error_free(s->migration_blocker);
+ return;
+ }
+ }
+
kvm_msi_use_devid = true;
kvm_gsi_direct_mapping = false;
kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled();
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 79a4b350a8..f3f3c2af4d 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -149,6 +149,8 @@ enum VMStateFlags {
typedef enum {
MIG_PRI_DEFAULT = 0,
MIG_PRI_IOMMU, /* Must happen before PCI devices */
+ MIG_PRI_GICV3_ITS, /* Must happen before PCI devices */
+ MIG_PRI_GICV3, /* Must happen before the ITS */
MIG_PRI_MAX,
} MigrationPriority;