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acpi/gpex: Exclude pxb's resources from PCI0 

Exclude the resources of extra root bridges from PCI0's _CRS. Otherwise,
the resource windows would overlap in guest, and the IO resource window
would fail to be registered.

Acked-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Jiahui Cen <cenjiahui@huawei.com>
Message-Id: <20210114100643.10617-6-cenjiahui@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jiahui Cen 2021-01-14 18:06:40 +08:00 committed by Michael S. Tsirkin
parent 0cf8882fd0
commit aee519c210
1 changed files with 43 additions and 21 deletions
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64
hw/pci-host/gpex-acpi.c
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@ -146,6 +146,8 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
Aml *method, *crs, *dev, *rbuf;
PCIBus *bus = cfg->bus;
CrsRangeSet crs_range_set;
CrsRangeEntry *entry;
int i;
/* start to construct the tables for pxb */
crs_range_set_init(&crs_range_set);
@ -193,7 +195,6 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
aml_append(scope, dev);
}
}
crs_range_set_free(&crs_range_set);
/* tables for the main */
dev = aml_device("%s", "PCI0");
@ -211,36 +212,55 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
aml_append(method, aml_return(aml_int(cfg->ecam.base)));
aml_append(dev, method);
/*
* At this point crs_range_set has all the ranges used by pci
* busses *other* than PCI0. These ranges will be excluded from
* the PCI0._CRS.
*/
rbuf = aml_resource_template();
aml_append(rbuf,
aml_word_bus_number(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
0x0000, 0x0000, nr_pcie_buses - 1, 0x0000,
nr_pcie_buses));
if (cfg->mmio32.size) {
aml_append(rbuf,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
cfg->mmio32.base,
cfg->mmio32.base + cfg->mmio32.size - 1,
0x0000,
cfg->mmio32.size));
crs_replace_with_free_ranges(crs_range_set.mem_ranges,
cfg->mmio32.base,
cfg->mmio32.base + cfg->mmio32.size - 1);
for (i = 0; i < crs_range_set.mem_ranges->len; i++) {
entry = g_ptr_array_index(crs_range_set.mem_ranges, i);
aml_append(rbuf,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
entry->base, entry->limit,
0x0000, entry->limit - entry->base + 1));
}
}
if (cfg->pio.size) {
aml_append(rbuf,
aml_dword_io(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
AML_ENTIRE_RANGE, 0x0000, 0x0000,
cfg->pio.size - 1,
cfg->pio.base,
cfg->pio.size));
crs_replace_with_free_ranges(crs_range_set.io_ranges,
0x0000,
cfg->pio.size - 1);
for (i = 0; i < crs_range_set.io_ranges->len; i++) {
entry = g_ptr_array_index(crs_range_set.io_ranges, i);
aml_append(rbuf,
aml_dword_io(AML_MIN_FIXED, AML_MAX_FIXED, AML_POS_DECODE,
AML_ENTIRE_RANGE, 0x0000, entry->base,
entry->limit, cfg->pio.base,
entry->limit - entry->base + 1));
}
}
if (cfg->mmio64.size) {
aml_append(rbuf,
aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
cfg->mmio64.base,
cfg->mmio64.base + cfg->mmio64.size - 1,
0x0000,
cfg->mmio64.size));
crs_replace_with_free_ranges(crs_range_set.mem_64bit_ranges,
cfg->mmio64.base,
cfg->mmio64.base + cfg->mmio64.size - 1);
for (i = 0; i < crs_range_set.mem_64bit_ranges->len; i++) {
entry = g_ptr_array_index(crs_range_set.mem_64bit_ranges, i);
aml_append(rbuf,
aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
AML_NON_CACHEABLE, AML_READ_WRITE, 0x0000,
entry->base,
entry->limit, 0x0000,
entry->limit - entry->base + 1));
}
}
aml_append(dev, aml_name_decl("_CRS", rbuf));
@ -259,4 +279,6 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
aml_append(dev_res0, aml_name_decl("_CRS", crs));
aml_append(dev, dev_res0);
aml_append(scope, dev);
crs_range_set_free(&crs_range_set);
}