diff options
Diffstat (limited to 'arch/powerpc/mm/numa.c')
| -rw-r--r-- | arch/powerpc/mm/numa.c | 56 |
1 files changed, 31 insertions, 25 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index bf5cb91f07d..0dc95c0aa3b 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -186,7 +186,7 @@ static void unmap_cpu_from_node(unsigned long cpu) dbg("removing cpu %lu from node %d\n", cpu, node); if (cpumask_test_cpu(cpu, node_to_cpumask_map[node])) { - cpumask_set_cpu(cpu, node_to_cpumask_map[node]); + cpumask_clear_cpu(cpu, node_to_cpumask_map[node]); } else { printk(KERN_ERR "WARNING: cpu %lu not found in node %d\n", cpu, node); @@ -1289,10 +1289,9 @@ u64 memory_hotplug_max(void) } #endif /* CONFIG_MEMORY_HOTPLUG */ -/* Vrtual Processor Home Node (VPHN) support */ +/* Virtual Processor Home Node (VPHN) support */ #ifdef CONFIG_PPC_SPLPAR -#define VPHN_NR_CHANGE_CTRS (8) -static u8 vphn_cpu_change_counts[NR_CPUS][VPHN_NR_CHANGE_CTRS]; +static u8 vphn_cpu_change_counts[NR_CPUS][MAX_DISTANCE_REF_POINTS]; static cpumask_t cpu_associativity_changes_mask; static int vphn_enabled; static void set_topology_timer(void); @@ -1303,16 +1302,18 @@ static void set_topology_timer(void); */ static void setup_cpu_associativity_change_counters(void) { - int cpu = 0; + int cpu; + + /* The VPHN feature supports a maximum of 8 reference points */ + BUILD_BUG_ON(MAX_DISTANCE_REF_POINTS > 8); for_each_possible_cpu(cpu) { - int i = 0; + int i; u8 *counts = vphn_cpu_change_counts[cpu]; volatile u8 *hypervisor_counts = lppaca[cpu].vphn_assoc_counts; - for (i = 0; i < VPHN_NR_CHANGE_CTRS; i++) { + for (i = 0; i < distance_ref_points_depth; i++) counts[i] = hypervisor_counts[i]; - } } } @@ -1329,7 +1330,7 @@ static void setup_cpu_associativity_change_counters(void) */ static int update_cpu_associativity_changes_mask(void) { - int cpu = 0, nr_cpus = 0; + int cpu, nr_cpus = 0; cpumask_t *changes = &cpu_associativity_changes_mask; cpumask_clear(changes); @@ -1339,8 +1340,8 @@ static int update_cpu_associativity_changes_mask(void) u8 *counts = vphn_cpu_change_counts[cpu]; volatile u8 *hypervisor_counts = lppaca[cpu].vphn_assoc_counts; - for (i = 0; i < VPHN_NR_CHANGE_CTRS; i++) { - if (hypervisor_counts[i] > counts[i]) { + for (i = 0; i < distance_ref_points_depth; i++) { + if (hypervisor_counts[i] != counts[i]) { counts[i] = hypervisor_counts[i]; changed = 1; } @@ -1354,8 +1355,11 @@ static int update_cpu_associativity_changes_mask(void) return nr_cpus; } -/* 6 64-bit registers unpacked into 12 32-bit associativity values */ -#define VPHN_ASSOC_BUFSIZE (6*sizeof(u64)/sizeof(u32)) +/* + * 6 64-bit registers unpacked into 12 32-bit associativity values. To form + * the complete property we have to add the length in the first cell. + */ +#define VPHN_ASSOC_BUFSIZE (6*sizeof(u64)/sizeof(u32) + 1) /* * Convert the associativity domain numbers returned from the hypervisor @@ -1363,15 +1367,14 @@ static int update_cpu_associativity_changes_mask(void) */ static int vphn_unpack_associativity(const long *packed, unsigned int *unpacked) { - int i = 0; - int nr_assoc_doms = 0; + int i, nr_assoc_doms = 0; const u16 *field = (const u16*) packed; #define VPHN_FIELD_UNUSED (0xffff) #define VPHN_FIELD_MSB (0x8000) #define VPHN_FIELD_MASK (~VPHN_FIELD_MSB) - for (i = 0; i < VPHN_ASSOC_BUFSIZE; i++) { + for (i = 1; i < VPHN_ASSOC_BUFSIZE; i++) { if (*field == VPHN_FIELD_UNUSED) { /* All significant fields processed, and remaining * fields contain the reserved value of all 1's. @@ -1379,14 +1382,12 @@ static int vphn_unpack_associativity(const long *packed, unsigned int *unpacked) */ unpacked[i] = *((u32*)field); field += 2; - } - else if (*field & VPHN_FIELD_MSB) { + } else if (*field & VPHN_FIELD_MSB) { /* Data is in the lower 15 bits of this field */ unpacked[i] = *field & VPHN_FIELD_MASK; field++; nr_assoc_doms++; - } - else { + } else { /* Data is in the lower 15 bits of this field * concatenated with the next 16 bit field */ @@ -1396,6 +1397,9 @@ static int vphn_unpack_associativity(const long *packed, unsigned int *unpacked) } } + /* The first cell contains the length of the property */ + unpacked[0] = nr_assoc_doms; + return nr_assoc_doms; } @@ -1405,7 +1409,7 @@ static int vphn_unpack_associativity(const long *packed, unsigned int *unpacked) */ static long hcall_vphn(unsigned long cpu, unsigned int *associativity) { - long rc = 0; + long rc; long retbuf[PLPAR_HCALL9_BUFSIZE] = {0}; u64 flags = 1; int hwcpu = get_hard_smp_processor_id(cpu); @@ -1419,7 +1423,7 @@ static long hcall_vphn(unsigned long cpu, unsigned int *associativity) static long vphn_get_associativity(unsigned long cpu, unsigned int *associativity) { - long rc = 0; + long rc; rc = hcall_vphn(cpu, associativity); @@ -1445,9 +1449,9 @@ static long vphn_get_associativity(unsigned long cpu, */ int arch_update_cpu_topology(void) { - int cpu = 0, nid = 0, old_nid = 0; + int cpu, nid, old_nid; unsigned int associativity[VPHN_ASSOC_BUFSIZE] = {0}; - struct sys_device *sysdev = NULL; + struct sys_device *sysdev; for_each_cpu_mask(cpu, cpu_associativity_changes_mask) { vphn_get_associativity(cpu, associativity); @@ -1512,7 +1516,9 @@ int start_topology_update(void) { int rc = 0; - if (firmware_has_feature(FW_FEATURE_VPHN)) { + /* Disabled until races with load balancing are fixed */ + if (0 && firmware_has_feature(FW_FEATURE_VPHN) && + get_lppaca()->shared_proc) { vphn_enabled = 1; setup_cpu_associativity_change_counters(); init_timer_deferrable(&topology_timer); |