From: John Levon <john.le...@nutanix.com> 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.john...@oracle.com> Signed-off-by: Jagannathan Raman <jag.ra...@oracle.com> Signed-off-by: Elena Ufimtseva <elena.ufimts...@oracle.com> Signed-off-by: John Levon <john.le...@nutanix.com> Reviewed-by: Cédric Le Goater <c...@redhat.com> Reviewed-by: Steve Sistare <steven.sist...@oracle.com> Link: https://lore.kernel.org/qemu-devel/20250521215534.2688540-1-john.le...@nutanix.com Signed-off-by: Cédric Le Goater <c...@redhat.com> --- include/hw/vfio/vfio-container-base.h | 9 +++++---- hw/vfio/container-base.c | 4 ++-- hw/vfio/container.c | 3 ++- hw/vfio/iommufd.c | 3 ++- hw/vfio/listener.c | 6 +++--- 5 files changed, 14 insertions(+), 11 deletions(-) diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h index f9e561cb081b361291e72ffe228845bd6b157f92..3feb773e5f41706a310b676c088ff95a85304325 100644 --- a/include/hw/vfio/vfio-container-base.h +++ b/include/hw/vfio/vfio-container-base.h @@ -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 * diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c index 1c6ca94b6040813a63bb8fca07b25189a8d8cb76..d834bd482290a8b195f94c07832b7f8020504c3a 100644 --- a/hw/vfio/container-base.c +++ b/hw/vfio/container-base.c @@ -75,12 +75,12 @@ 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) { VFIOIOMMUClass *vioc = VFIO_IOMMU_GET_CLASS(bcontainer); g_assert(vioc->dma_map); - return vioc->dma_map(bcontainer, iova, size, vaddr, readonly); + return vioc->dma_map(bcontainer, iova, size, vaddr, readonly, mr); } int vfio_container_dma_unmap(VFIOContainerBase *bcontainer, diff --git a/hw/vfio/container.c b/hw/vfio/container.c index a9f0dbaec4c8d83450048d9bc53b34d859731ebb..a8c76eb48165405e2b41186a266dbc69ae1b782a 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -207,7 +207,8 @@ static int vfio_legacy_dma_unmap(const VFIOContainerBase *bcontainer, } static int vfio_legacy_dma_map(const VFIOContainerBase *bcontainer, hwaddr iova, - ram_addr_t size, void *vaddr, bool readonly) + ram_addr_t size, void *vaddr, bool readonly, + MemoryRegion *mr) { const VFIOContainer *container = container_of(bcontainer, VFIOContainer, bcontainer); diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index 6b2696793f82fd68c306b85407b5f98201b9f5c6..46a3b36301e9a690e04347005e64552ed0abede5 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -34,7 +34,8 @@ TYPE_HOST_IOMMU_DEVICE_IOMMUFD "-vfio" static int iommufd_cdev_map(const VFIOContainerBase *bcontainer, hwaddr iova, - ram_addr_t size, void *vaddr, bool readonly) + ram_addr_t size, void *vaddr, bool readonly, + MemoryRegion *mr) { const VFIOIOMMUFDContainer *container = container_of(bcontainer, VFIOIOMMUFDContainer, bcontainer); diff --git a/hw/vfio/listener.c b/hw/vfio/listener.c index 38e3dc82cf3a3c46e4319e6245f6143749b3cccf..74958661236e230751e52dbfc7857426358dcaac 100644 --- a/hw/vfio/listener.c +++ b/hw/vfio/listener.c @@ -170,7 +170,7 @@ static void vfio_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb) */ ret = vfio_container_dma_map(bcontainer, iova, iotlb->addr_mask + 1, vaddr, - read_only); + read_only, mr); if (ret) { error_report("vfio_container_dma_map(%p, 0x%"HWADDR_PRIx", " "0x%"HWADDR_PRIx", %p) = %d (%s)", @@ -240,7 +240,7 @@ static int vfio_ram_discard_notify_populate(RamDiscardListener *rdl, vaddr = memory_region_get_ram_ptr(section->mr) + start; ret = vfio_container_dma_map(bcontainer, iova, next - start, - vaddr, section->readonly); + vaddr, section->readonly, section->mr); if (ret) { /* Rollback */ vfio_ram_discard_notify_discard(rdl, section); @@ -564,7 +564,7 @@ static void vfio_listener_region_add(MemoryListener *listener, } ret = vfio_container_dma_map(bcontainer, iova, int128_get64(llsize), - vaddr, section->readonly); + vaddr, section->readonly, section->mr); if (ret) { error_setg(&err, "vfio_container_dma_map(%p, 0x%"HWADDR_PRIx", " "0x%"HWADDR_PRIx", %p) = %d (%s)", -- 2.49.0
