x86: Fix UV BAU destination subnode id (3ef12c3c) · Commits · 戴 / test

The SGI UV Broadcast Assist Unit is used to send TLB shootdown messages to remote nodes of the system. The header of the message must contain the subnode id of the block in the receiving hub that handles such messages. It should always be 0x10, the id of the "LB" block. It had previously been documented as a "must be zero" field. Signed-off-by:

Cliff Wickman <cpw@sgi.com> Acked-by:

Jack Steiner <steiner@sgi.com> LKML-Reference: <E1Mc1x7-0005Ce-6t@eag09.americas.sgi.com> Signed-off-by:

Ingo Molnar <mingo@elte.hu>

arch/x86/include/asm/uv/uv_bau.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -133,7 +133,7 @@ struct bau_msg_payload {
		* see table 4.2.3.0.1 in broacast_assist spec.
		*/
		struct bau_msg_header {
		unsigned int dest_subnodeid:6; /* must be zero */
		unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
		/* bits 5:0 */
		unsigned int base_dest_nodeid:15; /* nasid>>1 (pnode) of */
		/* bits 20:6 / / first bit in node_map */

arch/x86/kernel/tlb_uv.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -744,6 +744,7 @@ uv_activation_descriptor_init(int node, int pnode)
		* note that base_dest_nodeid is actually a nasid.
		*/
		ad2->header.base_dest_nodeid = uv_partition_base_pnode << 1;
		ad2->header.dest_subnodeid = 0x10; /* the LB */
		ad2->header.command = UV_NET_ENDPOINT_INTD;
		ad2->header.int_both = 1;
		/*

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