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memory: Fix start offset for bitmap log_clear hook 

Currently only the final page offset is being passed to the `log_clear`
hook via `memory_region_clear_dirty_bitmap` after it is used as an
iterator in `cpu_physical_memory_test_and_clear_dirty`. This patch
corrects the start address and size of the region.

Signed-off-by: Matt Borgerson <contact@mborgerson.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Matt Borgerson 2020-02-18 03:19:10 -07:00 committed by Paolo Bonzini
parent a4aad716cb
commit 25aa6b3718
1 changed files with 5 additions and 4 deletions
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9
exec.c
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@ -1315,7 +1315,7 @@ bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
unsigned client)
{
DirtyMemoryBlocks *blocks;
unsigned long end, page;
unsigned long end, page, start_page;
bool dirty = false;
RAMBlock *ramblock;
uint64_t mr_offset, mr_size;
@ -1325,7 +1325,8 @@ bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
}
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
start_page = start >> TARGET_PAGE_BITS;
page = start_page;
WITH_RCU_READ_LOCK_GUARD() {
blocks = atomic_rcu_read(&ram_list.dirty_memory[client]);
@ -1345,8 +1346,8 @@ bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start,
page += num;
}
mr_offset = (ram_addr_t)(page << TARGET_PAGE_BITS) - ramblock->offset;
mr_size = (end - page) << TARGET_PAGE_BITS;
mr_offset = (ram_addr_t)(start_page << TARGET_PAGE_BITS) - ramblock->offset;
mr_size = (end - start_page) << TARGET_PAGE_BITS;
memory_region_clear_dirty_bitmap(ramblock->mr, mr_offset, mr_size);
}