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| author | Gavin Shan <gshan@redhat.com> | 2023-05-09 12:21:19 +1000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-05-18 08:53:50 +0200 |
| commit | 1e493be58708c3003d9e38b09eedf0134c0ca9fe (patch) | |
| tree | 70a7d9d6d6fbb67f0a1b525d3e12fefb2148c024 /softmmu | |
| parent | ed8d95182bc994e31e730c59e1c8bfec4822b27d (diff) | |
| download | qemu-1e493be58708c3003d9e38b09eedf0134c0ca9fe.zip qemu-1e493be58708c3003d9e38b09eedf0134c0ca9fe.tar.gz qemu-1e493be58708c3003d9e38b09eedf0134c0ca9fe.tar.bz2 | |
migration: Add last stage indicator to global dirty log
The global dirty log synchronization is used when KVM and dirty ring
are enabled. There is a particularity for ARM64 where the backup
bitmap is used to track dirty pages in non-running-vcpu situations.
It means the dirty ring works with the combination of ring buffer
and backup bitmap. The dirty bits in the backup bitmap needs to
collected in the last stage of live migration.
In order to identify the last stage of live migration and pass it
down, an extra parameter is added to the relevant functions and
callbacks. This last stage indicator isn't used until the dirty
ring is enabled in the subsequent patches.
No functional change intended.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Tested-by: Zhenyu Zhang <zhenyzha@redhat.com>
Message-Id: <20230509022122.20888-2-gshan@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'softmmu')
| -rw-r--r-- | softmmu/memory.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/softmmu/memory.c b/softmmu/memory.c index b7b3386..342c121 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -2253,7 +2253,7 @@ void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, * If memory region `mr' is NULL, do global sync. Otherwise, sync * dirty bitmap for the specified memory region. */ -static void memory_region_sync_dirty_bitmap(MemoryRegion *mr) +static void memory_region_sync_dirty_bitmap(MemoryRegion *mr, bool last_stage) { MemoryListener *listener; AddressSpace *as; @@ -2283,7 +2283,7 @@ static void memory_region_sync_dirty_bitmap(MemoryRegion *mr) * is to do a global sync, because we are not capable to * sync in a finer granularity. */ - listener->log_sync_global(listener); + listener->log_sync_global(listener, last_stage); trace_memory_region_sync_dirty(mr ? mr->name : "(all)", listener->name, 1); } } @@ -2347,7 +2347,7 @@ DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr, { DirtyBitmapSnapshot *snapshot; assert(mr->ram_block); - memory_region_sync_dirty_bitmap(mr); + memory_region_sync_dirty_bitmap(mr, false); snapshot = cpu_physical_memory_snapshot_and_clear_dirty(mr, addr, size, client); memory_global_after_dirty_log_sync(); return snapshot; @@ -2873,9 +2873,9 @@ bool memory_region_present(MemoryRegion *container, hwaddr addr) return mr && mr != container; } -void memory_global_dirty_log_sync(void) +void memory_global_dirty_log_sync(bool last_stage) { - memory_region_sync_dirty_bitmap(NULL); + memory_region_sync_dirty_bitmap(NULL, last_stage); } void memory_global_after_dirty_log_sync(void) |