From 818f86b88394b7b2b59d313e51043fe15a8004db Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Mon, 4 Nov 2013 08:06:08 +0200 Subject: [PATCH] exec: limit system memory size MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The page table logic in exec.c assumes that memory addresses are at most TARGET_PHYS_ADDR_SPACE_BITS. But pci addresses are full 64 bit so if we try to render them ignoring the extra bits, we get strange effects with sections overlapping each other. To fix, simply limit the system memory size to 1 << TARGET_PHYS_ADDR_SPACE_BITS, pci addresses will be rendered within that. Cc: qemu-stable@nongnu.org Reported-by: Andreas Färber Reviewed-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin --- exec.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/exec.c b/exec.c index b453713bdb..79610ce37a 100644 --- a/exec.c +++ b/exec.c @@ -1741,7 +1741,12 @@ void address_space_destroy_dispatch(AddressSpace *as) static void memory_map_init(void) { system_memory = g_malloc(sizeof(*system_memory)); - memory_region_init(system_memory, NULL, "system", INT64_MAX); + + assert(TARGET_PHYS_ADDR_SPACE_BITS <= 64); + + memory_region_init(system_memory, NULL, "system", + TARGET_PHYS_ADDR_SPACE_BITS == 64 ? + UINT64_MAX : (0x1ULL << TARGET_PHYS_ADDR_SPACE_BITS)); address_space_init(&address_space_memory, system_memory, "memory"); system_io = g_malloc(sizeof(*system_io));