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authorCliff Wickman <cpw@sgi.com>2009-04-16 07:53:09 -0500
committerIngo Molnar <mingo@elte.hu>2009-04-16 19:44:16 +0200
commit4ea3c51d5bd3bb4eea7d7d3a1f80d1a48c2a6f92 (patch)
tree025c060c7733bfc72a0614a60f745296070def69 /arch/x86
parent94ca8e4852807fc42d2f64fcaf248aafc4f2e6a7 (diff)
downloadlwn-4ea3c51d5bd3bb4eea7d7d3a1f80d1a48c2a6f92.tar.gz
lwn-4ea3c51d5bd3bb4eea7d7d3a1f80d1a48c2a6f92.zip
x86: UV BAU distribution and payload MMRs
This patch correctly sets BAU memory mapped registers to point to the sending activation descriptor table and target payload table. The "Broadcast Assist Unit" is used for TLB shootdown in UV. The memory mapped registers that point to sending and receiving memory structures contain node numbers. In one case the __pa() function did not provide the node id of memory on blade zero in configurations where that id is nonzero. In another case, it was assumed that memory was allocated on the local node. That assumption is not true in a configuration in which the node has no memory. Tested on the UV hardware simulator. [ Impact: fix possible runtime crash due to incorrect TLB logic ] Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1LuR5Z-0007An-B8@eag09.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/tlb_uv.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index 98307f953492..78422336ddea 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -717,7 +717,7 @@ uv_activation_descriptor_init(int node, int pnode)
adp = (struct bau_desc *)kmalloc_node(16384, GFP_KERNEL, node);
BUG_ON(!adp);
- pa = __pa((unsigned long)adp);
+ pa = uv_gpa(adp); /* need the real nasid*/
n = pa >> uv_nshift;
m = pa & uv_mmask;
@@ -754,6 +754,8 @@ static struct bau_payload_queue_entry * __init
uv_payload_queue_init(int node, int pnode, struct bau_control *bau_tablesp)
{
struct bau_payload_queue_entry *pqp;
+ unsigned long pa;
+ int pn;
char *cp;
pqp = (struct bau_payload_queue_entry *) kmalloc_node(
@@ -764,10 +766,14 @@ uv_payload_queue_init(int node, int pnode, struct bau_control *bau_tablesp)
cp = (char *)pqp + 31;
pqp = (struct bau_payload_queue_entry *)(((unsigned long)cp >> 5) << 5);
bau_tablesp->va_queue_first = pqp;
+ /*
+ * need the pnode of where the memory was really allocated
+ */
+ pa = uv_gpa(pqp);
+ pn = pa >> uv_nshift;
uv_write_global_mmr64(pnode,
UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST,
- ((unsigned long)pnode <<
- UV_PAYLOADQ_PNODE_SHIFT) |
+ ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) |
uv_physnodeaddr(pqp));
uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL,
uv_physnodeaddr(pqp));