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exec/ioport: Add portio_list_set_address()

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Some SuperI/O devices such as the VIA south bridges or the PC87312 controller
are able to relocate their SuperI/O functions. Add a convenience function for
implementing this in the VIA south bridges.

This convenience function relies on previous simplifications in exec/ioport
which avoids some duplicate synchronization of I/O port base addresses. The
naming of the function is inspired by its memory_region_set_address() pendant.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20240114123911.4877-6-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Bernhard Beschow 2024-01-14 13:39:05 +01:00 • committed by Michael S. Tsirkin
parent 4edee342f8
commit ad2b652341
3 changed files with 24 additions and 2 deletions
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5
docs/devel/migration/main.rst
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@ -431,10 +431,10 @@ data doesn't match the stored device data well; it allows an
intermediate temporary structure to be populated with migration
data and then transferred to the main structure.
If you use memory API functions that update memory layout outside
If you use memory or portio_list API functions that update memory layout outside
initialization (i.e., in response to a guest action), this is a strong
indication that you need to call these functions in a ``post_load`` callback.
Examples of such memory API functions are:
Examples of such API functions are:
- memory_region_add_subregion()
- memory_region_del_subregion()
@ -443,6 +443,7 @@ Examples of such memory API functions are:
- memory_region_set_enabled()
- memory_region_set_address()
- memory_region_set_alias_offset()
- portio_list_set_address()
Iterative device migration
--------------------------