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x86/platform/UV: Fix incorrect nodes and pnodes for cpuless and memoryless nodes

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This patch fixes the problem of incorrect nodes and pnodes being returned
when referring to nodes that either have no cpus (AKA "headless") or no
memory.

Tested-by: John Estabrook <estabrook@sgi.com>
Tested-by: Gary Kroening <gfk@sgi.com>
Tested-by: Nathan Zimmer <nzimmer@sgi.com>
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Andrew Banman <abanman@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <rja@sgi.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160429215406.192644884@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Dimitri Sivanich 2016-04-29 16:54:23 -05:00 committed by Ingo Molnar
parent 40bfb8eedf
commit f68376fc9e
1 changed files with 28 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
arch/x86/kernel/apic/x2apic_uv_x.c
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@ -1232,8 +1232,7 @@ static void __init decode_uv_systab(void)
*/
static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
{
size_t bytes;
int blade, i, j, uv_pb = 0, num_nodes = num_possible_nodes();
int i, uv_pb = 0;
pr_info("UV: NODE_PRESENT_DEPTH = %d\n", UVH_NODE_PRESENT_TABLE_DEPTH);
for (i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
@ -1247,28 +1246,6 @@ static __init void boot_init_possible_blades(struct uv_hub_info_s *hub_info)
}
if (uv_possible_blades != uv_pb)
uv_possible_blades = uv_pb;
bytes = num_nodes * sizeof(_node_to_pnode[0]);
_node_to_pnode = kmalloc(bytes, GFP_KERNEL);
BUG_ON(!_node_to_pnode);
for (blade = 0, i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++) {
unsigned short pnode;
unsigned long present =
uv_read_local_mmr(UVH_NODE_PRESENT_TABLE + i * 8);
for (j = 0; j < 64; j++) {
if (!test_bit(j, &present))
continue;
pnode = (i * 64 + j) & hub_info->pnode_mask;
_node_to_pnode[blade++] = pnode;
}
if (blade > num_nodes) {
pr_err("UV: blade count(%d) exceeds node count(%d)!\n",
blade, num_nodes);
BUG();
}
}
}
static void __init build_socket_tables(void)
@ -1449,7 +1426,6 @@ void __init uv_system_init(void)
bytes = sizeof(struct uv_hub_info_s);
for_each_node(nodeid) {
struct uv_hub_info_s *new_hub;
unsigned short pnode;
if (__uv_hub_info_list[nodeid]) {
pr_err("UV: Node %d UV HUB already initialized!?\n",
@ -1467,10 +1443,11 @@ void __init uv_system_init(void)
BUG_ON(!new_hub);
*new_hub = hub_info;
pnode = _node_to_pnode[nodeid];
min_pnode = min(pnode, min_pnode);
max_pnode = max(pnode, max_pnode);
new_hub->pnode = pnode;
/* Use information from GAM table if available */
if (_node_to_pnode)
new_hub->pnode = _node_to_pnode[nodeid];
else /* Fill in during cpu loop */
new_hub->pnode = 0xffff;
new_hub->numa_blade_id = uv_node_to_blade_id(nodeid);
new_hub->memory_nid = -1;
new_hub->nr_possible_cpus = 0;
@ -1480,18 +1457,39 @@ void __init uv_system_init(void)
/* Initialize per cpu info */
for_each_possible_cpu(cpu) {
int apicid = per_cpu(x86_cpu_to_apicid, cpu);
int numa_node_id;
unsigned short pnode;
nodeid = cpu_to_node(cpu);
numa_node_id = numa_cpu_node(cpu);
pnode = uv_apicid_to_pnode(apicid);
uv_cpu_info_per(cpu)->p_uv_hub_info = uv_hub_info_list(nodeid);
uv_cpu_info_per(cpu)->blade_cpu_id =
uv_cpu_hub_info(cpu)->nr_possible_cpus++;
if (uv_cpu_hub_info(cpu)->memory_nid == -1)
uv_cpu_hub_info(cpu)->memory_nid = cpu_to_node(cpu);
if (nodeid != numa_node_id && /* init memoryless node */
uv_hub_info_list(numa_node_id)->pnode == 0xffff)
uv_hub_info_list(numa_node_id)->pnode = pnode;
else if (uv_cpu_hub_info(cpu)->pnode == 0xffff)
uv_cpu_hub_info(cpu)->pnode = pnode;
uv_cpu_scir_info(cpu)->offset = uv_scir_offset(apicid);
}
/* Display per node info */
for_each_node(nodeid) {
unsigned short pnode = uv_hub_info_list(nodeid)->pnode;
/* Add pnode info for pre-GAM list nodes without cpus */
if (pnode == 0xffff) {
unsigned long paddr;
paddr = node_start_pfn(nodeid) << PAGE_SHIFT;
pnode = uv_gpa_to_pnode(uv_soc_phys_ram_to_gpa(paddr));
uv_hub_info_list(nodeid)->pnode = pnode;
}
min_pnode = min(pnode, min_pnode);
max_pnode = max(pnode, max_pnode);
pr_info("UV: UVHUB node:%2d pn:%02x nrcpus:%d\n",
nodeid,
uv_hub_info_list(nodeid)->pnode,