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memory: Add IOMMU_NOTIFIER_DEVIOTLB_UNMAP IOMMUTLBNotificationType 

This allows us to differentiate between regular IOMMU map/unmap events
and DEVIOTLB unmap. Doing so, notifiers that only need device IOTLB
invalidations will not receive regular IOMMU unmappings.

Adapt intel and vhost to use it.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20201116165506.31315-4-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eugenio Pérez 2020-11-16 17:55:04 +01:00 committed by Michael S. Tsirkin
parent 5039caf3c4
commit b68ba1ca57
3 changed files with 8 additions and 3 deletions
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2
hw/i386/intel_iommu.c
View File

@ -2468,7 +2468,7 @@ static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s,
sz = VTD_PAGE_SIZE;
}
event.type = IOMMU_NOTIFIER_UNMAP;
event.type = IOMMU_NOTIFIER_DEVIOTLB_UNMAP;
event.entry.target_as = &vtd_dev_as->as;
event.entry.addr_mask = sz - 1;
event.entry.iova = addr;

2
hw/virtio/vhost.c
View File

@ -718,7 +718,7 @@ static void vhost_iommu_region_add(MemoryListener *listener,
iommu_idx = memory_region_iommu_attrs_to_index(iommu_mr,
MEMTXATTRS_UNSPECIFIED);
iommu_notifier_init(&iommu->n, vhost_iommu_unmap_notify,
IOMMU_NOTIFIER_UNMAP,
IOMMU_NOTIFIER_DEVIOTLB_UNMAP,
section->offset_within_region,
int128_get64(end),
iommu_idx);

7
include/exec/memory.h
View File

@ -97,9 +97,14 @@ typedef enum {
IOMMU_NOTIFIER_UNMAP = 0x1,
/* Notify entry changes (newly created entries) */
IOMMU_NOTIFIER_MAP = 0x2,
/* Notify changes on device IOTLB entries */
IOMMU_NOTIFIER_DEVIOTLB_UNMAP = 0x04,
} IOMMUNotifierFlag;
#define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP)
#define IOMMU_NOTIFIER_IOTLB_EVENTS (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP)
#define IOMMU_NOTIFIER_DEVIOTLB_EVENTS IOMMU_NOTIFIER_DEVIOTLB_UNMAP
#define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_IOTLB_EVENTS | \
IOMMU_NOTIFIER_DEVIOTLB_EVENTS)
struct IOMMUNotifier;
typedef void (*IOMMUNotify)(struct IOMMUNotifier *notifier,