Hi Zhenzhong, > -----Original Message----- > From: Zhenzhong Duan <zhenzhong.d...@intel.com> > Sent: Wednesday, February 19, 2025 8:22 AM > To: qemu-devel@nongnu.org > Cc: alex.william...@redhat.com; c...@redhat.com; eric.au...@redhat.com; > m...@redhat.com; jasow...@redhat.com; pet...@redhat.com; > j...@nvidia.com; nicol...@nvidia.com; Shameerali Kolothum Thodi > <shameerali.kolothum.th...@huawei.com>; joao.m.mart...@oracle.com; > clement.mathieu--d...@eviden.com; kevin.t...@intel.com; > yi.l....@intel.com; chao.p.p...@intel.com; Zhenzhong Duan > <zhenzhong.d...@intel.com> > Subject: [PATCH rfcv2 01/20] backends/iommufd: Add helpers for > invalidating user-managed HWPT > > Signed-off-by: Nicolin Chen <nicol...@nvidia.com> > Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com> > --- > include/system/iommufd.h | 3 +++ > backends/iommufd.c | 30 ++++++++++++++++++++++++++++++ > backends/trace-events | 1 + > 3 files changed, 34 insertions(+) > > diff --git a/include/system/iommufd.h b/include/system/iommufd.h > index cbab75bfbf..5d02e9d148 100644 > --- a/include/system/iommufd.h > +++ b/include/system/iommufd.h > @@ -61,6 +61,9 @@ 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 iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t > hwpt_id, > + uint32_t data_type, uint32_t entry_len, > + uint32_t *entry_num, void *data_ptr); > > #define TYPE_HOST_IOMMU_DEVICE_IOMMUFD > TYPE_HOST_IOMMU_DEVICE "-iommufd" > #endif > diff --git a/backends/iommufd.c b/backends/iommufd.c > index d57da44755..fc32aad5cb 100644 > --- a/backends/iommufd.c > +++ b/backends/iommufd.c > @@ -311,6 +311,36 @@ bool > iommufd_backend_get_device_info(IOMMUFDBackend *be, uint32_t devid, > return true; > } > > +int iommufd_backend_invalidate_cache(IOMMUFDBackend *be, uint32_t > hwpt_id,
Nit: As per struct iommu_hwpt_invalidate documentation this can be an ID of Nested HWPT or vIOMMU. May be better to rename this just to id. Thanks, Shameer
