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[PATCH v4 13/14] vfio/migration: Query device dirty page tracking suppor
From: |
Joao Martins |
Subject: |
[PATCH v4 13/14] vfio/migration: Query device dirty page tracking support |
Date: |
Tue, 7 Mar 2023 02:02:57 +0000 |
Now that everything has been set up for device dirty page tracking,
query the device for device dirty page tracking support.
Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
---
hw/vfio/migration.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index 776fd2d7cdf3..127a44ccaf19 100644
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -555,6 +555,19 @@ static int vfio_migration_query_flags(VFIODevice
*vbasedev, uint64_t *mig_flags)
return 0;
}
+static bool vfio_dma_logging_supported(VFIODevice *vbasedev)
+{
+ uint64_t buf[DIV_ROUND_UP(sizeof(struct vfio_device_feature),
+ sizeof(uint64_t))] = {};
+ struct vfio_device_feature *feature = (struct vfio_device_feature *)buf;
+
+ feature->argsz = sizeof(buf);
+ feature->flags =
+ VFIO_DEVICE_FEATURE_PROBE | VFIO_DEVICE_FEATURE_DMA_LOGGING_START;
+
+ return !ioctl(vbasedev->fd, VFIO_DEVICE_FEATURE, feature);
+}
+
static int vfio_migration_init(VFIODevice *vbasedev)
{
int ret;
@@ -589,6 +602,8 @@ static int vfio_migration_init(VFIODevice *vbasedev)
migration->device_state = VFIO_DEVICE_STATE_RUNNING;
migration->data_fd = -1;
+ vbasedev->dirty_pages_supported = vfio_dma_logging_supported(vbasedev);
+
oid = vmstate_if_get_id(VMSTATE_IF(DEVICE(obj)));
if (oid) {
path = g_strdup_printf("%s/vfio", oid);
--
2.17.2
- Re: [PATCH v4 08/14] vfio/common: Record DMA mapped IOVA ranges, (continued)
[PATCH v4 09/14] vfio/common: Add device dirty page tracking start/stop, Joao Martins, 2023/03/06
[PATCH v4 10/14] vfio/common: Extract code from vfio_get_dirty_bitmap() to new function, Joao Martins, 2023/03/06
[PATCH v4 11/14] vfio/common: Add device dirty page bitmap sync, Joao Martins, 2023/03/06
[PATCH v4 12/14] vfio/migration: Block migration with vIOMMU, Joao Martins, 2023/03/06
[PATCH v4 13/14] vfio/migration: Query device dirty page tracking support,
Joao Martins <=
[PATCH v4 14/14] docs/devel: Document VFIO device dirty page tracking, Joao Martins, 2023/03/06