diff options
Diffstat (limited to 'docs/interop/vhost-user.rst')
| -rw-r--r-- | docs/interop/vhost-user.rst | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/docs/interop/vhost-user.rst b/docs/interop/vhost-user.rst index 8a5924e..1720d68 100644 --- a/docs/interop/vhost-user.rst +++ b/docs/interop/vhost-user.rst @@ -130,18 +130,8 @@ A vring address description Note that a ring address is an IOVA if ``VIRTIO_F_IOMMU_PLATFORM`` has been negotiated. Otherwise it is a user address. -Memory regions description -^^^^^^^^^^^^^^^^^^^^^^^^^^ - -+-------------+---------+---------+-----+---------+ -| num regions | padding | region0 | ... | region7 | -+-------------+---------+---------+-----+---------+ - -:num regions: a 32-bit number of regions - -:padding: 32-bit - -A region is: +Memory region description +^^^^^^^^^^^^^^^^^^^^^^^^^ +---------------+------+--------------+-------------+ | guest address | size | user address | mmap offset | @@ -158,19 +148,26 @@ A region is: Single memory region description ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -+---------+---------------+------+--------------+-------------+ -| padding | guest address | size | user address | mmap offset | -+---------+---------------+------+--------------+-------------+ ++---------+--------+ +| padding | region | ++---------+--------+ :padding: 64-bit -:guest address: a 64-bit guest address of the region +A region is represented by Memory region description. -:size: a 64-bit size +Multiple Memory regions description +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -:user address: a 64-bit user address ++-------------+---------+---------+-----+---------+ +| num regions | padding | region0 | ... | region7 | ++-------------+---------+---------+-----+---------+ -:mmap offset: 64-bit offset where region starts in the mapped memory +:num regions: a 32-bit number of regions + +:padding: 32-bit + +A region is represented by Memory region description. Log description ^^^^^^^^^^^^^^^ @@ -952,8 +949,8 @@ Front-end message types ``VHOST_USER_SET_MEM_TABLE`` :id: 5 :equivalent ioctl: ``VHOST_SET_MEM_TABLE`` - :request payload: memory regions description - :reply payload: (postcopy only) memory regions description + :request payload: multiple memory regions description + :reply payload: (postcopy only) multiple memory regions description Sets the memory map regions on the back-end so it can translate the vring addresses. In the ancillary data there is an array of file |