[Xen-devel] [PATCH v2 1/2] Resize the MAX_NR_IO_RANGES for ioreq server

[Yu Zhang <yu.c.zhang@xxxxxxxxxxxxxxx>]

MAX_NR_IO_RANGES is used by ioreq server as the maximum
number of discrete ranges to be tracked. This patch changes
its value to 8k, so that more ranges can be tracked on next
generation of Intel platforms in XenGT. Future patches can
extend the limit to be toolstack tunable, and MAX_NR_IO_RANGES
can serve as a default limit.

Signed-off-by: Yu Zhang <yu.c.zhang@xxxxxxxxxxxxxxx>
---
 xen/include/asm-x86/hvm/domain.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/include/asm-x86/hvm/domain.h b/xen/include/asm-x86/hvm/domain.h
index ad68fcf..d62fda9 100644
--- a/xen/include/asm-x86/hvm/domain.h
+++ b/xen/include/asm-x86/hvm/domain.h
@@ -49,7 +49,7 @@ struct hvm_ioreq_vcpu {
 };
 
 #define NR_IO_RANGE_TYPES (HVMOP_IO_RANGE_PCI + 1)
-#define MAX_NR_IO_RANGES  256
+#define MAX_NR_IO_RANGES  8192
 
 struct hvm_ioreq_server {
     struct list_head       list_entry;
-- 
1.9.1


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