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apci: fix PXB behaviour if used with unsupported BIOS 

PXB does not work with unsupported bioses, but should
not interfere with normal OS operation.
We don't ship them anymore, but it's reasonable
to keep the work-around until we update the bios in qemu.

Fix this by not adding PXB mem/IO chunks to _CRS
if they weren't configured by BIOS.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2015-06-02 14:23:11 +03:00 committed by Michael S. Tsirkin
parent 0e79e51a7d
commit 0f6dd8e1d5
1 changed files with 58 additions and 29 deletions
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87
hw/i386/acpi-build.c
View File

@ -786,6 +786,14 @@ static Aml *build_crs(PCIHostState *host,
range_base = r->addr;
range_limit = r->addr + r->size - 1;
/*
* Work-around for old bioses
* that do not support multiple root buses
*/
if (!range_base || range_base > range_limit) {
continue;
}
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
aml_append(crs,
aml_word_io(AML_MIN_FIXED, AML_MAX_FIXED,
@ -819,45 +827,66 @@ static Aml *build_crs(PCIHostState *host,
range_base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO);
range_limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO);
aml_append(crs,
aml_word_io(AML_MIN_FIXED, AML_MAX_FIXED,
AML_POS_DECODE, AML_ENTIRE_RANGE,
0,
range_base,
range_limit,
0,
range_limit - range_base + 1));
crs_range_insert(io_ranges, range_base, range_limit);
/*
* Work-around for old bioses
* that do not support multiple root buses
*/
if (range_base || range_base > range_limit) {
aml_append(crs,
aml_word_io(AML_MIN_FIXED, AML_MAX_FIXED,
AML_POS_DECODE, AML_ENTIRE_RANGE,
0,
range_base,
range_limit,
0,
range_limit - range_base + 1));
crs_range_insert(io_ranges, range_base, range_limit);
}
range_base =
pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
range_limit =
pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY);
aml_append(crs,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
AML_MAX_FIXED, AML_NON_CACHEABLE,
AML_READ_WRITE,
0,
range_base,
range_limit,
0,
range_limit - range_base + 1));
crs_range_insert(mem_ranges, range_base, range_limit);
/*
* Work-around for old bioses
* that do not support multiple root buses
*/
if (range_base || range_base > range_limit) {
aml_append(crs,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
AML_MAX_FIXED, AML_NON_CACHEABLE,
AML_READ_WRITE,
0,
range_base,
range_limit,
0,
range_limit - range_base + 1));
crs_range_insert(mem_ranges, range_base, range_limit);
}
range_base =
pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
range_limit =
pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);
aml_append(crs,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
AML_MAX_FIXED, AML_NON_CACHEABLE,
AML_READ_WRITE,
0,
range_base,
range_limit,
0,
range_limit - range_base + 1));
crs_range_insert(mem_ranges, range_base, range_limit);
/*
* Work-around for old bioses
* that do not support multiple root buses
*/
if (range_base || range_base > range_limit) {
aml_append(crs,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
AML_MAX_FIXED, AML_NON_CACHEABLE,
AML_READ_WRITE,
0,
range_base,
range_limit,
0,
range_limit - range_base + 1));
crs_range_insert(mem_ranges, range_base, range_limit);
}
}
}