From 5ab97b7f81dccccee03a3f1d03a4d09a27f0eeff Mon Sep 17 00:00:00 2001 From: Alex Rozenman Date: Tue, 13 Dec 2011 12:52:08 +0200 Subject: [PATCH] phys_page_find_alloc: Use correct initial region_offset. This fixes a common bug with initial region_offset value. Usually, the pages are re-assigned afterwards, so the bug has a very small effect on regular QEMU use flows. Signed-off-by: Alex Rozenman Signed-off-by: Anthony Liguori --- exec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/exec.c b/exec.c index eef5e2f12a..06889bdf18 100644 --- a/exec.c +++ b/exec.c @@ -418,6 +418,7 @@ static PhysPageDesc *phys_page_find_alloc(target_phys_addr_t index, int alloc) pd = *lp; if (pd == NULL) { int i; + int first_index = index & ~(L2_SIZE - 1); if (!alloc) { return NULL; @@ -427,7 +428,7 @@ static PhysPageDesc *phys_page_find_alloc(target_phys_addr_t index, int alloc) for (i = 0; i < L2_SIZE; i++) { pd[i].phys_offset = IO_MEM_UNASSIGNED; - pd[i].region_offset = (index + i) << TARGET_PAGE_BITS; + pd[i].region_offset = (first_index + i) << TARGET_PAGE_BITS; } } -- GitLab