If the available hardware exceeds DMAR_UNITS_SUPPORTED (previously set
to MAX_IO_APICS, or 128), it causes these messages: "DMAR: Failed to
allocate seq_id", "DMAR: Parse DMAR table failure.", and "x2apic: IRQ
remapping doesn't support X2APIC mode x2apic disabled"; and the system
fails to boot properly.

To support up to 64 sockets with 10 DMAR units each (640), make the
value of DMAR_UNITS_SUPPORTED default 1024.

Signed-off-by: Steve Wahl<steve.w...@hpe.com>
Signed-off-by: Lu Baolu <baolu...@linux.intel.com>
---
 include/linux/dmar.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index cbd714a198a0..d81a51978d01 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -18,11 +18,7 @@
 
 struct acpi_dmar_header;
 
-#ifdef CONFIG_X86
-# define       DMAR_UNITS_SUPPORTED    MAX_IO_APICS
-#else
-# define       DMAR_UNITS_SUPPORTED    64
-#endif
+#define DMAR_UNITS_SUPPORTED   1024
 
 /* DMAR Flags */
 #define DMAR_INTR_REMAP                0x1
-- 
2.25.1

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