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acpi/crs: Prevent bad ranges for host bridges

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Prevent _CRS resources being quietly chopped off and instead throw an
assertion. _CRS is used by host bridges to declare regions of io and/or
memory that they consume. On some (all?) platforms the host bridge
doesn't have PCI header space and so they need some way to convey the
information.

Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>

Message-Id: <20201026193924.985014-1-ben.widawsky@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Ben Widawsky 2020-10-26 12:39:23 -07:00 committed by Michael S. Tsirkin
parent 384c2561bd
commit acab9d8a9e
1 changed files with 2 additions and 0 deletions
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hw/i386/acpi-build.c
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@ -866,6 +866,8 @@ static Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set)
crs_range_merge(temp_range_set.mem_ranges);
for (i = 0; i < temp_range_set.mem_ranges->len; i++) {
entry = g_ptr_array_index(temp_range_set.mem_ranges, i);
assert(entry->limit <= UINT32_MAX &&
(entry->limit - entry->base + 1) <= UINT32_MAX);
aml_append(crs,
aml_dword_memory(AML_POS_DECODE, AML_MIN_FIXED,
AML_MAX_FIXED, AML_NON_CACHEABLE,