From 93de2a6a4b91b72607136dd656edf03fb399d27f Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 23 Sep 2026 09:37:21 -0700 Subject: KVM: SEV: Do cache maintenance on the source VM during intra-host migration Manually perform cache maintenance on the source VM during intra-host migration to ensure no stale data is left in CPU caches after the VM is destroyed. Because the source VM is "converted" to a non-SEV VM, KVM's memory reclaim flows won't trigger cache maintenance, e.g. when all guest memory is reclaimed in response to detaching from the mmu_notifier. Note, relying on the destination VM to do cache maintenance isn't an option as KVM doesn't require identical guest memory configurations, i.e. the source VM may have access to memory that the destination VM does not. Enforcing equivalent memory configurations is infeasible, as it would require a *deep* comparison of memslots, e.g. to verify that not only are the memslot identical, but what the memslots point at is also identical. Fixes: b56639318bb2 ("KVM: SEV: Add support for SEV intra host migration") Cc: stable@vger.kernel.org Reported-by: Stefan Teodorescu Signed-off-by: Sean Christopherson Message-ID: <20260923163721.1584779-3-seanjc@google.com> Signed-off-by: Paolo Bonzini --- Documentation/gpu/imagination/index.rst | 13 +++ Documentation/gpu/imagination/uapi.rst | 171 ++++++++++++++++++++++++++++++++ 2 files changed, 184 insertions(+) create mode 100644 Documentation/gpu/imagination/index.rst create mode 100644 Documentation/gpu/imagination/uapi.rst (limited to 'Documentation/gpu/imagination') diff --git a/Documentation/gpu/imagination/index.rst b/Documentation/gpu/imagination/index.rst new file mode 100644 index 000000000..0c1e247ce --- /dev/null +++ b/Documentation/gpu/imagination/index.rst @@ -0,0 +1,13 @@ +======================================= +drm/imagination PowerVR Graphics Driver +======================================= + +.. kernel-doc:: drivers/gpu/drm/imagination/pvr_drv.c + :doc: PowerVR (Series 6 and later) and IMG Graphics Driver + +Contents +======== +.. toctree:: + :maxdepth: 2 + + uapi diff --git a/Documentation/gpu/imagination/uapi.rst b/Documentation/gpu/imagination/uapi.rst new file mode 100644 index 000000000..7502413d0 --- /dev/null +++ b/Documentation/gpu/imagination/uapi.rst @@ -0,0 +1,171 @@ +==== +UAPI +==== +The sources associated with this section can be found in ``pvr_drm.h``. + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR UAPI + +OBJECT ARRAYS +============= +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_obj_array + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: DRM_PVR_OBJ_ARRAY + +IOCTLS +====== +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL interface + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: PVR_IOCTL + +DEV_QUERY +--------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL DEV_QUERY interface + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_dev_query + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_dev_query_args + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_dev_query_gpu_info + drm_pvr_dev_query_runtime_info + drm_pvr_dev_query_hwrt_info + drm_pvr_dev_query_quirks + drm_pvr_dev_query_enhancements + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_heap_id + drm_pvr_heap + drm_pvr_dev_query_heap_info + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_static_data_area_usage + drm_pvr_static_data_area + drm_pvr_dev_query_static_data_areas + +CREATE_BO +--------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL CREATE_BO interface + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_create_bo_args + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: Flags for CREATE_BO + +GET_BO_MMAP_OFFSET +------------------ +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL GET_BO_MMAP_OFFSET interface + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_get_bo_mmap_offset_args + +CREATE_VM_CONTEXT and DESTROY_VM_CONTEXT +---------------------------------------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL CREATE_VM_CONTEXT and DESTROY_VM_CONTEXT interfaces + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_create_vm_context_args + drm_pvr_ioctl_destroy_vm_context_args + +VM_MAP and VM_UNMAP +------------------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL VM_MAP and VM_UNMAP interfaces + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_vm_map_args + drm_pvr_ioctl_vm_unmap_args + +CREATE_CONTEXT and DESTROY_CONTEXT +---------------------------------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL CREATE_CONTEXT and DESTROY_CONTEXT interfaces + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_create_context_args + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ctx_priority + drm_pvr_ctx_type + drm_pvr_static_render_context_state + drm_pvr_static_render_context_state_format + drm_pvr_reset_framework + drm_pvr_reset_framework_format + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_destroy_context_args + +CREATE_FREE_LIST and DESTROY_FREE_LIST +-------------------------------------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL CREATE_FREE_LIST and DESTROY_FREE_LIST interfaces + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_create_free_list_args + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_destroy_free_list_args + +CREATE_HWRT_DATASET and DESTROY_HWRT_DATASET +-------------------------------------------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL CREATE_HWRT_DATASET and DESTROY_HWRT_DATASET interfaces + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_create_hwrt_dataset_args + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_create_hwrt_geom_data_args + drm_pvr_create_hwrt_rt_data_args + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_destroy_hwrt_dataset_args + +SUBMIT_JOBS +----------- +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: PowerVR IOCTL SUBMIT_JOBS interface + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: Flags for the drm_pvr_sync_op object. + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_ioctl_submit_jobs_args + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: Flags for SUBMIT_JOB ioctl geometry command. + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: Flags for SUBMIT_JOB ioctl fragment command. + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: Flags for SUBMIT_JOB ioctl compute command. + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :doc: Flags for SUBMIT_JOB ioctl transfer command. + +.. kernel-doc:: include/uapi/drm/pvr_drm.h + :identifiers: drm_pvr_sync_op + drm_pvr_job_type + drm_pvr_hwrt_data_ref + drm_pvr_job + +Internal notes +============== +.. kernel-doc:: drivers/gpu/drm/imagination/pvr_device.h + :doc: IOCTL validation helpers + +.. kernel-doc:: drivers/gpu/drm/imagination/pvr_device.h + :identifiers: PVR_STATIC_ASSERT_64BIT_ALIGNED PVR_IOCTL_UNION_PADDING_CHECK + pvr_ioctl_union_padding_check -- cgit v1.3.1