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pc: map PCI address space as catchall region for not mapped addresses

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With a help of negative memory region priority PCI address space
is mapped underneath RAM regions effectively catching every access
to addresses not mapped by any other region.
It simplifies PCI address space mapping into system address space.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-10-29 13:57:34 +01:00
parent e689f7c668
commit 83d08f2673
6 changed files with 14 additions and 71 deletions
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23
hw/pci-host/q35.c
View file

@ -356,28 +356,11 @@ static int mch_init(PCIDevice *d)
{
int i;
MCHPCIState *mch = MCH_PCI_DEVICE(d);
uint64_t pci_hole64_size;
/* setup pci memory regions */
memory_region_init_alias(&mch->pci_hole, OBJECT(mch), "pci-hole",
mch->pci_address_space,
mch->below_4g_mem_size,
0x100000000ULL - mch->below_4g_mem_size);
memory_region_add_subregion(mch->system_memory, mch->below_4g_mem_size,
&mch->pci_hole);
/* setup pci memory mapping */
pc_pci_as_mapping_init(OBJECT(mch), mch->system_memory,
mch->pci_address_space);
pci_hole64_size = pci_host_get_hole64_size(mch->pci_hole64_size);
pc_init_pci64_hole(&mch->pci_info, 0x100000000ULL + mch->above_4g_mem_size,
pci_hole64_size);
memory_region_init_alias(&mch->pci_hole_64bit, OBJECT(mch), "pci-hole64",
mch->pci_address_space,
mch->pci_info.w64.begin,
pci_hole64_size);
if (pci_hole64_size) {
memory_region_add_subregion(mch->system_memory,
mch->pci_info.w64.begin,
&mch->pci_hole_64bit);
}
/* smram */
cpu_smm_register(&mch_set_smm, mch);
memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region",