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Subject[PATCH] x86: UV broadcast assist unit base destination node id
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Date
From: Cliff Wickman <cpw@sgi.com>

The BAU's initialization of the broadcast description header is lacking
the coherence domain (high bits) in the nasid. This causes a catastrophic
system failure when running on a system with multiple coherence domains.

Diffed against 2.6.32.12

Signed-off-by: Cliff Wickman <cpw@sgi.com>
---
arch/x86/include/asm/uv/uv_bau.h | 2 +-
arch/x86/kernel/tlb_uv.c | 3 ++-
2 files changed, 3 insertions(+), 2 deletions(-)

Index: linux/arch/x86/kernel/tlb_uv.c
===================================================================
--- linux.orig/arch/x86/kernel/tlb_uv.c
+++ linux/arch/x86/kernel/tlb_uv.c
@@ -1361,7 +1361,8 @@ uv_activation_descriptor_init(int node,
* in the partition. The bit map will indicate uvhub numbers,
* which are 0-N in a partition. Pnodes are unique system-wide.
*/
- bd2->header.base_dest_nodeid = uv_partition_base_pnode << 1;
+ bd2->header.base_dest_nodeid =
+ UV_PNODE_TO_NASID(uv_partition_base_pnode);
bd2->header.dest_subnodeid = 0x10; /* the LB */
bd2->header.command = UV_NET_ENDPOINT_INTD;
bd2->header.int_both = 1;
Index: linux/arch/x86/include/asm/uv/uv_bau.h
===================================================================
--- linux.orig/arch/x86/include/asm/uv/uv_bau.h
+++ linux/arch/x86/include/asm/uv/uv_bau.h
@@ -176,7 +176,7 @@ struct bau_msg_payload {
struct bau_msg_header {
unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
/* bits 5:0 */
- unsigned int base_dest_nodeid:15; /* nasid (pnode<<1) of */
+ unsigned int base_dest_nodeid:15; /* nasid of the */
/* bits 20:6 */ /* first bit in uvhub map */
unsigned int command:8; /* message type */
/* bits 28:21 */

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