mirror of https://github.com/proxmox/mirror_qemu
exec: limit system memory size
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 <afaerber@suse.de> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>master
parent
98af2ac93f
commit
818f86b883
7
exec.c
7
exec.c
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@ -1741,7 +1741,12 @@ void address_space_destroy_dispatch(AddressSpace *as)
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static void memory_map_init(void)
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static void memory_map_init(void)
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{
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{
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system_memory = g_malloc(sizeof(*system_memory));
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system_memory = g_malloc(sizeof(*system_memory));
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memory_region_init(system_memory, NULL, "system", INT64_MAX);
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assert(TARGET_PHYS_ADDR_SPACE_BITS <= 64);
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memory_region_init(system_memory, NULL, "system",
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TARGET_PHYS_ADDR_SPACE_BITS == 64 ?
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UINT64_MAX : (0x1ULL << TARGET_PHYS_ADDR_SPACE_BITS));
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address_space_init(&address_space_memory, system_memory, "memory");
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address_space_init(&address_space_memory, system_memory, "memory");
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system_io = g_malloc(sizeof(*system_io));
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system_io = g_malloc(sizeof(*system_io));
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