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vfio/container: pass MemoryRegion to DMA operations

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Pass through the MemoryRegion to DMA operation handlers of vfio
containers. The vfio-user container will need this later, to translate
the vaddr into an offset for the dma map vfio-user message; CPR will
also will need this.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/qemu-devel/20250521215534.2688540-1-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
John Levon 2025-05-21 22:55:34 +01:00 • committed by Cédric Le Goater
parent e3353d63e1
commit 44d0acf834
5 changed files with 14 additions and 11 deletions
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9
include/hw/vfio/vfio-container-base.h
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@ -78,7 +78,7 @@ void vfio_address_space_insert(VFIOAddressSpace *space,
int vfio_container_dma_map(VFIOContainerBase *bcontainer,
hwaddr iova, ram_addr_t size,
void *vaddr, bool readonly);
void *vaddr, bool readonly, MemoryRegion *mr);
int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
hwaddr iova, ram_addr_t size,
IOMMUTLBEntry *iotlb, bool unmap_all);
@ -151,20 +151,21 @@ struct VFIOIOMMUClass {
/**
* @dma_map
*
* Map an address range into the container.
* Map an address range into the container. Note that the memory region is
* referenced within an RCU read lock region across this call.
*
* @bcontainer: #VFIOContainerBase to use
* @iova: start address to map
* @size: size of the range to map
* @vaddr: process virtual address of mapping
* @readonly: true if mapping should be readonly
* @mr: the memory region for this mapping
*
* Returns 0 to indicate success and -errno otherwise.
*/
int (*dma_map)(const VFIOContainerBase *bcontainer,
hwaddr iova, ram_addr_t size,
void *vaddr, bool readonly);
void *vaddr, bool readonly, MemoryRegion *mr);
/**
* @dma_unmap
*