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arch_init: align MR size to target page size

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Migration code assumes that each MR is a multiple of TARGET_PAGE_SIZE:
MR size is divided by TARGET_PAGE_SIZE, so if it isn't migration
never completes.
But this isn't really required for regions set up with
memory_region_init_ram, since that calls qemu_ram_alloc
which aligns size up using TARGET_PAGE_ALIGN.

Align MR size up to full target page sizes, this way
migration completes even if we create a RAM MR
which is not a full target page size.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-08-19 17:26:52 +03:00
parent c0b4cc1f9f
commit 0851c9f75c
1 changed files with 2 additions and 1 deletions
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3
arch_init.c
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@ -342,7 +342,8 @@ ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
{
unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
unsigned long nr = base + (start >> TARGET_PAGE_BITS);
unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
uint64_t mr_size = TARGET_PAGE_ALIGN(memory_region_size(mr));
unsigned long size = base + (mr_size >> TARGET_PAGE_BITS);
unsigned long next;