diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/memory.h | 47 | ||||
| -rw-r--r-- | include/hw/vfio/vfio-common.h | 2 |
2 files changed, 41 insertions, 8 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 3e4d4164cd..14cda673f9 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -67,6 +67,27 @@ struct IOMMUTLBEntry { IOMMUAccessFlags perm; }; +/* + * Bitmap for different IOMMUNotifier capabilities. Each notifier can + * register with one or multiple IOMMU Notifier capability bit(s). + */ +typedef enum { + IOMMU_NOTIFIER_NONE = 0, + /* Notify cache invalidations */ + IOMMU_NOTIFIER_UNMAP = 0x1, + /* Notify entry changes (newly created entries) */ + IOMMU_NOTIFIER_MAP = 0x2, +} IOMMUNotifierFlag; + +#define IOMMU_NOTIFIER_ALL (IOMMU_NOTIFIER_MAP | IOMMU_NOTIFIER_UNMAP) + +struct IOMMUNotifier { + void (*notify)(struct IOMMUNotifier *notifier, IOMMUTLBEntry *data); + IOMMUNotifierFlag notifier_flags; + QLIST_ENTRY(IOMMUNotifier) node; +}; +typedef struct IOMMUNotifier IOMMUNotifier; + /* New-style MMIO accessors can indicate that the transaction failed. * A zero (MEMTX_OK) response means success; anything else is a failure * of some kind. The memory subsystem will bitwise-OR together results @@ -201,7 +222,7 @@ struct MemoryRegion { const char *name; unsigned ioeventfd_nb; MemoryRegionIoeventfd *ioeventfds; - NotifierList iommu_notify; + QLIST_HEAD(, IOMMUNotifier) iommu_notify; }; /** @@ -607,6 +628,15 @@ uint64_t memory_region_iommu_get_min_page_size(MemoryRegion *mr); /** * memory_region_notify_iommu: notify a change in an IOMMU translation entry. * + * The notification type will be decided by entry.perm bits: + * + * - For UNMAP (cache invalidation) notifies: set entry.perm to IOMMU_NONE. + * - For MAP (newly added entry) notifies: set entry.perm to the + * permission of the page (which is definitely !IOMMU_NONE). + * + * Note: for any IOMMU implementation, an in-place mapping change + * should be notified with an UNMAP followed by a MAP. + * * @mr: the memory region that was changed * @entry: the new entry in the IOMMU translation table. The entry * replaces all old entries for the same virtual I/O address range. @@ -620,11 +650,12 @@ void memory_region_notify_iommu(MemoryRegion *mr, * IOMMU translation entries. * * @mr: the memory region to observe - * @n: the notifier to be added; the notifier receives a pointer to an - * #IOMMUTLBEntry as the opaque value; the pointer ceases to be - * valid on exit from the notifier. + * @n: the IOMMUNotifier to be added; the notify callback receives a + * pointer to an #IOMMUTLBEntry as the opaque value; the pointer + * ceases to be valid on exit from the notifier. */ -void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n); +void memory_region_register_iommu_notifier(MemoryRegion *mr, + IOMMUNotifier *n); /** * memory_region_iommu_replay: replay existing IOMMU translations to @@ -636,7 +667,8 @@ void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n); * @is_write: Whether to treat the replay as a translate "write" * through the iommu */ -void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n, bool is_write); +void memory_region_iommu_replay(MemoryRegion *mr, IOMMUNotifier *n, + bool is_write); /** * memory_region_unregister_iommu_notifier: unregister a notifier for @@ -646,7 +678,8 @@ void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n, bool is_write); * needs to be called * @n: the notifier to be removed. */ -void memory_region_unregister_iommu_notifier(MemoryRegion *mr, Notifier *n); +void memory_region_unregister_iommu_notifier(MemoryRegion *mr, + IOMMUNotifier *n); /** * memory_region_name: get a memory region's name diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 94dfae387a..c17602e533 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -93,7 +93,7 @@ typedef struct VFIOGuestIOMMU { VFIOContainer *container; MemoryRegion *iommu; hwaddr iommu_offset; - Notifier n; + IOMMUNotifier n; QLIST_ENTRY(VFIOGuestIOMMU) giommu_next; } VFIOGuestIOMMU; |