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qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 5/22/2025 1:20 PM, Cédric Le Goater wrote: > On 5/21/25 23:55, John Levon wrote: >> 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 >> Signed-off-by: Jagannathan Raman >> Signed-off-by: Elena Ufimtseva >> Signed-off-by: John Levon >> --- >>   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(-) > > Steven, > > Can you base the live update series on this patch ? Yes, its already on my todo list for V4. - Steve >> diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h >> index f9e561cb08..3feb773e5f 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 1c6ca94b60..d834bd4822 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 a9f0dbaec4..a8c76eb481 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 6b2696793f..46a3b36301 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 38e3dc82cf..7495866123 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)", >