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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.220.177.32; envelope-from=joao.m.martins@oracle.com; helo=mx0b-00069f02.pphosted.com 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, DKIMWL_WL_MED=-0.001, 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_H4=0.001, RCVD_IN_MSPIKE_WL=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @oracle.com) X-ZM-MESSAGEID: 1720784941429116600 Content-Type: text/plain; charset="utf-8" ioctl(iommufd, IOMMU_HWPT_GET_DIRTY_BITMAP, arg) is the UAPI that fetches the bitmap that tells what was dirty in an IOVA range. A single bitmap is allocated and used across all the hwpts sharing an IOAS which is then used in log_sync() to set Qemu global bitmaps. Signed-off-by: Joao Martins Reviewed-by: C=C3=A9dric Le Goater Reviewed-by: Eric Auger --- include/sysemu/iommufd.h | 4 ++++ backends/iommufd.c | 29 +++++++++++++++++++++++++++++ hw/vfio/iommufd.c | 27 +++++++++++++++++++++++++++ backends/trace-events | 1 + 4 files changed, 61 insertions(+) diff --git a/include/sysemu/iommufd.h b/include/sysemu/iommufd.h index 7416d9219703..869ca8b7ef59 100644 --- a/include/sysemu/iommufd.h +++ b/include/sysemu/iommufd.h @@ -57,6 +57,10 @@ bool iommufd_backend_alloc_hwpt(IOMMUFDBackend *be, uint= 32_t dev_id, Error **errp); bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend *be, uint32_t hwpt_= id, bool start, Error **errp); +bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, uint32_t hwpt_id, + uint64_t iova, ram_addr_t size, + uint64_t page_size, uint64_t *data, + Error **errp); =20 #define TYPE_HOST_IOMMU_DEVICE_IOMMUFD TYPE_HOST_IOMMU_DEVICE "-iommufd" =20 diff --git a/backends/iommufd.c b/backends/iommufd.c index 239f0976e0ad..46be719cae71 100644 --- a/backends/iommufd.c +++ b/backends/iommufd.c @@ -262,6 +262,35 @@ bool iommufd_backend_set_dirty_tracking(IOMMUFDBackend= *be, return true; } =20 +bool iommufd_backend_get_dirty_bitmap(IOMMUFDBackend *be, + uint32_t hwpt_id, + uint64_t iova, ram_addr_t size, + uint64_t page_size, uint64_t *data, + Error **errp) +{ + int ret; + struct iommu_hwpt_get_dirty_bitmap get_dirty_bitmap =3D { + .size =3D sizeof(get_dirty_bitmap), + .hwpt_id =3D hwpt_id, + .iova =3D iova, + .length =3D size, + .page_size =3D page_size, + .data =3D (uintptr_t)data, + }; + + ret =3D ioctl(be->fd, IOMMU_HWPT_GET_DIRTY_BITMAP, &get_dirty_bitmap); + trace_iommufd_backend_get_dirty_bitmap(be->fd, hwpt_id, iova, size, + page_size, ret ? errno : 0); + if (ret) { + error_setg_errno(errp, errno, + "IOMMU_HWPT_GET_DIRTY_BITMAP (iova: 0x%"HWADDR_PR= Ix + " size: 0x%"HWADDR_PRIx") failed", iova, size); + return false; + } + + return true; +} + bool iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid, uint32_t *type, void *data, uint32_t = len, uint64_t *caps, Error **errp) diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index da678315faeb..1fd1558fa0c0 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -25,6 +25,7 @@ #include "qemu/cutils.h" #include "qemu/chardev_open.h" #include "pci.h" +#include "exec/ram_addr.h" =20 static int iommufd_cdev_map(const VFIOContainerBase *bcontainer, hwaddr io= va, ram_addr_t size, void *vaddr, bool readonly) @@ -146,6 +147,31 @@ err: return -EINVAL; } =20 +static int iommufd_query_dirty_bitmap(const VFIOContainerBase *bcontainer, + VFIOBitmap *vbmap, hwaddr iova, + hwaddr size, Error **errp) +{ + VFIOIOMMUFDContainer *container =3D container_of(bcontainer, + VFIOIOMMUFDContainer, + bcontainer); + unsigned long page_size =3D qemu_real_host_page_size(); + VFIOIOASHwpt *hwpt; + + QLIST_FOREACH(hwpt, &container->hwpt_list, next) { + if (!iommufd_hwpt_dirty_tracking(hwpt)) { + continue; + } + + if (!iommufd_backend_get_dirty_bitmap(container->be, hwpt->hwpt_id, + iova, size, page_size, + vbmap->bitmap, errp)) { + return -EINVAL; + } + } + + return 0; +} + static int iommufd_cdev_getfd(const char *sysfs_path, Error **errp) { ERRP_GUARD(); @@ -754,6 +780,7 @@ static void vfio_iommu_iommufd_class_init(ObjectClass *= klass, void *data) vioc->detach_device =3D iommufd_cdev_detach; vioc->pci_hot_reset =3D iommufd_cdev_pci_hot_reset; vioc->set_dirty_page_tracking =3D iommufd_set_dirty_page_tracking; + vioc->query_dirty_bitmap =3D iommufd_query_dirty_bitmap; }; =20 static bool hiod_iommufd_vfio_realize(HostIOMMUDevice *hiod, void *opaque, diff --git a/backends/trace-events b/backends/trace-events index 28aca3b859d4..40811a316215 100644 --- a/backends/trace-events +++ b/backends/trace-events @@ -17,3 +17,4 @@ iommufd_backend_alloc_ioas(int iommufd, uint32_t ioas) " = iommufd=3D%d ioas=3D%d" iommufd_backend_alloc_hwpt(int iommufd, uint32_t dev_id, uint32_t pt_id, u= int32_t flags, uint32_t hwpt_type, uint32_t len, uint64_t data_ptr, uint32_= t out_hwpt_id, int ret) " iommufd=3D%d dev_id=3D%u pt_id=3D%u flags=3D0x%x = hwpt_type=3D%u len=3D%u data_ptr=3D0x%"PRIx64" out_hwpt=3D%u (%d)" iommufd_backend_free_id(int iommufd, uint32_t id, int ret) " iommufd=3D%d = id=3D%d (%d)" iommufd_backend_set_dirty(int iommufd, uint32_t hwpt_id, bool start, int r= et) " iommufd=3D%d hwpt=3D%u enable=3D%d (%d)" +iommufd_backend_get_dirty_bitmap(int iommufd, uint32_t hwpt_id, uint64_t i= ova, uint64_t size, uint64_t page_size, int ret) " iommufd=3D%d hwpt=3D%u i= ova=3D0x%"PRIx64" size=3D0x%"PRIx64" page_size=3D0x%"PRIx64" (%d)" --=20 2.17.2