diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/sparc/mm/init_64.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/sparc/mm/init_64.c')
-rw-r--r-- | kernel/arch/sparc/mm/init_64.c | 76 |
1 files changed, 73 insertions, 3 deletions
diff --git a/kernel/arch/sparc/mm/init_64.c b/kernel/arch/sparc/mm/init_64.c index c5d08b89a..3025bd57f 100644 --- a/kernel/arch/sparc/mm/init_64.c +++ b/kernel/arch/sparc/mm/init_64.c @@ -93,6 +93,8 @@ static unsigned long cpu_pgsz_mask; static struct linux_prom64_registers pavail[MAX_BANKS]; static int pavail_ents; +u64 numa_latency[MAX_NUMNODES][MAX_NUMNODES]; + static int cmp_p64(const void *a, const void *b) { const struct linux_prom64_registers *x = a, *y = b; @@ -1157,6 +1159,48 @@ static struct mdesc_mlgroup * __init find_mlgroup(u64 node) return NULL; } +int __node_distance(int from, int to) +{ + if ((from >= MAX_NUMNODES) || (to >= MAX_NUMNODES)) { + pr_warn("Returning default NUMA distance value for %d->%d\n", + from, to); + return (from == to) ? LOCAL_DISTANCE : REMOTE_DISTANCE; + } + return numa_latency[from][to]; +} + +static int find_best_numa_node_for_mlgroup(struct mdesc_mlgroup *grp) +{ + int i; + + for (i = 0; i < MAX_NUMNODES; i++) { + struct node_mem_mask *n = &node_masks[i]; + + if ((grp->mask == n->mask) && (grp->match == n->val)) + break; + } + return i; +} + +static void find_numa_latencies_for_group(struct mdesc_handle *md, u64 grp, + int index) +{ + u64 arc; + + mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) { + int tnode; + u64 target = mdesc_arc_target(md, arc); + struct mdesc_mlgroup *m = find_mlgroup(target); + + if (!m) + continue; + tnode = find_best_numa_node_for_mlgroup(m); + if (tnode == MAX_NUMNODES) + continue; + numa_latency[index][tnode] = m->latency; + } +} + static int __init numa_attach_mlgroup(struct mdesc_handle *md, u64 grp, int index) { @@ -1220,9 +1264,16 @@ static int __init numa_parse_mdesc_group(struct mdesc_handle *md, u64 grp, static int __init numa_parse_mdesc(void) { struct mdesc_handle *md = mdesc_grab(); - int i, err, count; + int i, j, err, count; u64 node; + /* Some sane defaults for numa latency values */ + for (i = 0; i < MAX_NUMNODES; i++) { + for (j = 0; j < MAX_NUMNODES; j++) + numa_latency[i][j] = (i == j) ? + LOCAL_DISTANCE : REMOTE_DISTANCE; + } + node = mdesc_node_by_name(md, MDESC_NODE_NULL, "latency-groups"); if (node == MDESC_NODE_NULL) { mdesc_release(md); @@ -1245,6 +1296,23 @@ static int __init numa_parse_mdesc(void) count++; } + count = 0; + mdesc_for_each_node_by_name(md, node, "group") { + find_numa_latencies_for_group(md, node, count); + count++; + } + + /* Normalize numa latency matrix according to ACPI SLIT spec. */ + for (i = 0; i < MAX_NUMNODES; i++) { + u64 self_latency = numa_latency[i][i]; + + for (j = 0; j < MAX_NUMNODES; j++) { + numa_latency[i][j] = + (numa_latency[i][j] * LOCAL_DISTANCE) / + self_latency; + } + } + add_node_ranges(); for (i = 0; i < num_node_masks; i++) { @@ -1966,7 +2034,8 @@ static phys_addr_t __init available_memory(void) phys_addr_t pa_start, pa_end; u64 i; - for_each_free_mem_range(i, NUMA_NO_NODE, &pa_start, &pa_end, NULL) + for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &pa_start, + &pa_end, NULL) available = available + (pa_end - pa_start); return available; @@ -1992,7 +2061,8 @@ static void __init reduce_memory(phys_addr_t limit_ram) if (limit_ram >= avail_ram) return; - for_each_free_mem_range(i, NUMA_NO_NODE, &pa_start, &pa_end, NULL) { + for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &pa_start, + &pa_end, NULL) { phys_addr_t region_size = pa_end - pa_start; phys_addr_t clip_start = pa_start; |