In __acpi_map_table(), it suppose all ACPI tables may not exceed 4 pages.
but nowadays ACPI tables, such as SRAT table, are large enough, On my
BIOS board, the SRAT table achieves the size of 14428B, although it's
above 3 pages and within 4pages, but in __acpi_map_table(), it maps pages
to get the table. suppose the start address is near the end of the first
page:
1000B 4096B 4096B 4096B 1140B
|___|_____________|______________|______________|____|
although the total page is within 4pages , but it may be in fact across 5
pages, thus the NUM_FIXMAP_ACPI_PAGES should be at least 5 nowadays. If
not, xen would wrongly thinks no NUMA configuation could be found as that it
could not get SRAT table.
diff --git a/xen/include/xen/acpi.h b/xen/include/xen/acpi.h
index 30ec0ee..bd616a1 100644
--- a/xen/include/xen/acpi.h
+++ b/xen/include/xen/acpi.h
@@ -43,7 +43,7 @@
* Fixmap pages to reserve for ACPI boot-time tables (see asm-x86/fixmap.h or
* asm-arm/config.h)
*/
-#define NUM_FIXMAP_ACPI_PAGES 4
+#define NUM_FIXMAP_ACPI_PAGES 5
#define BAD_MADT_ENTRY(entry, end) ( \
(!(entry)) || (unsigned long)(entry) + sizeof(*(entry)) >
(end) || \
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