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authorCliff Wickman <cpw@sgi.com>2009-04-14 10:56:48 -0500
committerIngo Molnar <mingo@elte.hu>2009-04-14 18:53:36 +0200
commit94ca8e4852807fc42d2f64fcaf248aafc4f2e6a7 (patch)
tree252cbed5179b7bd699aa7750370b1776705a0278 /arch/x86/kernel
parent54c28d294c658abb6d6430a49fda230fdfd601c8 (diff)
x86: UV: BAU partition-relative distribution map
This patch enables each partition's BAU distribution bit map to be partition-relative. The distribution bitmap had been constructed assuming 0 as the base node number. That construct would not have allowed a total system of greater than 256 nodes. It also corrects an error that occurred when the first blade's nasid was not zero. That nasid was stored as the base node. The base node number gets added by hardware to the node numbers implied in the distribution bitmap, resulting in invalid target nasids. Tested on the UV hardware simulator. Signed-off-by: Cliff Wickman <cpw@sgi.com> LKML-Reference: <E1Ltl0C-0004Ob-37@eag09.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/tlb_uv.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index fced96e94e2..98307f95349 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -25,6 +25,8 @@ static int uv_bau_retry_limit __read_mostly;
/* position of pnode (which is nasid>>1): */
static int uv_nshift __read_mostly;
+/* base pnode in this partition */
+static int uv_partition_base_pnode __read_mostly;
static unsigned long uv_mmask __read_mostly;
@@ -43,7 +45,7 @@ static int __init blade_to_first_node(int blade)
if (blade == b)
return node;
}
- BUG();
+ return -1; /* shouldn't happen */
}
/*
@@ -359,7 +361,8 @@ const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
locals++;
continue;
}
- bau_node_set(pnode, &bau_desc->distribution);
+ bau_node_set(pnode - uv_partition_base_pnode,
+ &bau_desc->distribution);
i++;
}
if (i == 0) {
@@ -728,7 +731,12 @@ uv_activation_descriptor_init(int node, int pnode)
for (i = 0, ad2 = adp; i < UV_ACTIVATION_DESCRIPTOR_SIZE; i++, ad2++) {
memset(ad2, 0, sizeof(struct bau_desc));
ad2->header.sw_ack_flag = 1;
- ad2->header.base_dest_nodeid = uv_cpu_to_pnode(0);
+ /*
+ * base_dest_nodeid is the first node in the partition, so
+ * the bit map will indicate partition-relative node numbers.
+ * note that base_dest_nodeid is actually a nasid.
+ */
+ ad2->header.base_dest_nodeid = uv_partition_base_pnode << 1;
ad2->header.command = UV_NET_ENDPOINT_INTD;
ad2->header.int_both = 1;
/*
@@ -825,6 +833,11 @@ static int __init uv_bau_init(void)
kmalloc(nblades * sizeof(struct bau_control *), GFP_KERNEL);
BUG_ON(!uv_bau_table_bases);
+ uv_partition_base_pnode = 0x7fffffff;
+ for (blade = 0; blade < nblades; blade++)
+ if (uv_blade_nr_possible_cpus(blade) &&
+ (uv_blade_to_pnode(blade) < uv_partition_base_pnode))
+ uv_partition_base_pnode = uv_blade_to_pnode(blade);
for (blade = 0; blade < nblades; blade++)
if (uv_blade_nr_possible_cpus(blade))
uv_init_blade(blade);