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| -rw-r--r-- | docs/migration.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/docs/migration.txt b/docs/migration.txt index 4848c1e52d..f3ddd2f1a8 100644 --- a/docs/migration.txt +++ b/docs/migration.txt @@ -219,6 +219,18 @@ The functions to do that are inside a vmstate definition, and are called: Example: You can look at hpet.c, that uses the three function to massage the state that is transferred. +If you use memory 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: + + - memory_region_add_subregion() + - memory_region_del_subregion() + - memory_region_set_readonly() + - memory_region_set_enabled() + - memory_region_set_address() + - memory_region_set_alias_offset() + === Subsections === The use of version_id allows to be able to migrate from older versions |