From f9ee9f9ac28d6964772c08d5d428b713d58a3aca Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Thu, 30 Jan 2014 23:03:50 +1100 Subject: exec: fix ram_list dirty map optimization The ae2810c4bb3b383176e8e1b33931b16c01483aab patch introduced optimization for ram_list.dirty_memory update. However it can only work correctly if hpratio is 1 as the @bitmap parameter stores 1 bits per system page size (may vary, 4K or 64K on PPC64) and ram_list.dirty_memory stores 1 bit per TARGET_PAGE_SIZE (which is hardcoded to 4K). This fixes hpratio!=1 case to fall back to the slow path. Signed-off-by: Alexey Kardashevskiy Signed-off-by: Juan Quintela --- include/exec/ram_addr.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/exec') diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index 481a447417..2edfa96c6d 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -93,7 +93,8 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap, unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); /* start address is aligned at the start of a word? */ - if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) { + if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) && + (hpratio == 1)) { long k; long nr = BITS_TO_LONGS(pages); -- cgit v1.2.3