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X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 5/21/2025 3:43 AM, Cédric Le Goater wrote: > +Steven, > > On 5/20/25 17:03, 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. >> >> Originally-by: John Johnson >> Signed-off-by: Jagannathan Raman >> Signed-off-by: Elena Ufimtseva >> Signed-off-by: John Levon > > > This change conflicts with : > >   https://lore.kernel.org/qemu-devel/1747063973-124548-28-git-send-email-steven.sistare@oracle.com > > Steven, > > Could we use this version instead for the "live update" series ? Sure, I will drop my patch and use this. A few nits, iff there is another version of the series. I suggest "mrp" be renamed "mr", to be consistent with all other MemoryRegion* variables. A MemoryRegion is never passed by value, so the "p" is understood. This comment for @dma_map needs polishing for clarity: + * Map an address range into the container. Note that @mrp will within an + * RCU read lock region across this call. - Steve >> --- >>   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 41c49b2aa5..c18986a621 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 *mrp); >>   int vfio_container_dma_unmap(VFIOContainerBase *bcontainer, >>                                hwaddr iova, ram_addr_t size, >>                                IOMMUTLBEntry *iotlb, bool unmap_all); >> @@ -149,18 +149,19 @@ struct VFIOIOMMUClass { >>       /** >>        * @dma_map >>        * >> -     * Map an address range into the container. >> +     * Map an address range into the container. Note that @mrp will 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 >> +     * @mrp: the memory region for this mapping >>        */ >>       int (*dma_map)(const VFIOContainerBase *bcontainer, >>                      hwaddr iova, ram_addr_t size, >> -                   void *vaddr, bool readonly); >> - >> +                   void *vaddr, bool readonly, MemoryRegion *mrp); >>       /** >>        * @dma_unmap >>        * >> diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c >> index 1c6ca94b60..a677bb6694 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 *mrp) >>   { >>       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, mrp); >>   } >>   int vfio_container_dma_unmap(VFIOContainerBase *bcontainer, >> diff --git a/hw/vfio/container.c b/hw/vfio/container.c >> index a9f0dbaec4..98d6b9f90c 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 *mrp) >>   { >>       const VFIOContainer *container = container_of(bcontainer, VFIOContainer, >>                                                     bcontainer); >> diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c >> index af1c7ab10a..a2518c4a5d 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 *mrp) >>   { >>       const VFIOIOMMUFDContainer *container = >>           container_of(bcontainer, VFIOIOMMUFDContainer, bcontainer); >> diff --git a/hw/vfio/listener.c b/hw/vfio/listener.c >> index 0afafe3464..a1d2d2561d 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)", >