diff options
Diffstat (limited to 'arch/powerpc/perf/hv-24x7.c')
| -rw-r--r-- | arch/powerpc/perf/hv-24x7.c | 96 |
1 files changed, 86 insertions, 10 deletions
diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c index 573e0b309c0c..db213eb7cb02 100644 --- a/arch/powerpc/perf/hv-24x7.c +++ b/arch/powerpc/perf/hv-24x7.c @@ -20,6 +20,7 @@ #include <asm/io.h> #include <linux/byteorder/generic.h> +#include <asm/rtas.h> #include "hv-24x7.h" #include "hv-24x7-catalog.h" #include "hv-common.h" @@ -57,6 +58,65 @@ static bool is_physical_domain(unsigned domain) } } +/* + * The Processor Module Information system parameter allows transferring + * of certain processor module information from the platform to the OS. + * Refer PAPR+ document to get parameter token value as '43'. + */ + +#define PROCESSOR_MODULE_INFO 43 + +static u32 phys_sockets; /* Physical sockets */ +static u32 phys_chipspersocket; /* Physical chips per socket*/ +static u32 phys_coresperchip; /* Physical cores per chip */ + +/* + * read_24x7_sys_info() + * Retrieve the number of sockets and chips per socket and cores per + * chip details through the get-system-parameter rtas call. + */ +void read_24x7_sys_info(void) +{ + int call_status, len, ntypes; + + spin_lock(&rtas_data_buf_lock); + + /* + * Making system parameter: chips and sockets and cores per chip + * default to 1. + */ + phys_sockets = 1; + phys_chipspersocket = 1; + phys_coresperchip = 1; + + call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, + NULL, + PROCESSOR_MODULE_INFO, + __pa(rtas_data_buf), + RTAS_DATA_BUF_SIZE); + + if (call_status != 0) { + pr_err("Error calling get-system-parameter %d\n", + call_status); + } else { + len = be16_to_cpup((__be16 *)&rtas_data_buf[0]); + if (len < 8) + goto out; + + ntypes = be16_to_cpup((__be16 *)&rtas_data_buf[2]); + + if (!ntypes) + goto out; + + phys_sockets = be16_to_cpup((__be16 *)&rtas_data_buf[4]); + phys_chipspersocket = be16_to_cpup((__be16 *)&rtas_data_buf[6]); + phys_coresperchip = be16_to_cpup((__be16 *)&rtas_data_buf[8]); + } + +out: + spin_unlock(&rtas_data_buf_lock); +} + /* Domains for which more than one result element are returned for each event. */ static bool domain_needs_aggregation(unsigned int domain) { @@ -386,6 +446,24 @@ static ssize_t device_show_string(struct device *dev, return sprintf(buf, "%s\n", (char *)d->var); } +static ssize_t sockets_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", phys_sockets); +} + +static ssize_t chipspersocket_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", phys_chipspersocket); +} + +static ssize_t coresperchip_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", phys_coresperchip); +} + static struct attribute *device_str_attr_create_(char *name, char *str) { struct dev_ext_attribute *attr = kzalloc(sizeof(*attr), GFP_KERNEL); @@ -1032,6 +1110,9 @@ PAGE_0_ATTR(catalog_len, "%lld\n", (unsigned long long)be32_to_cpu(page_0->length) * 4096); static BIN_ATTR_RO(catalog, 0/* real length varies */); static DEVICE_ATTR_RO(domains); +static DEVICE_ATTR_RO(sockets); +static DEVICE_ATTR_RO(chipspersocket); +static DEVICE_ATTR_RO(coresperchip); static struct bin_attribute *if_bin_attrs[] = { &bin_attr_catalog, @@ -1042,6 +1123,9 @@ static struct attribute *if_attrs[] = { &dev_attr_catalog_len.attr, &dev_attr_catalog_version.attr, &dev_attr_domains.attr, + &dev_attr_sockets.attr, + &dev_attr_chipspersocket.attr, + &dev_attr_coresperchip.attr, NULL, }; @@ -1400,16 +1484,6 @@ static void h_24x7_event_read(struct perf_event *event) h24x7hw = &get_cpu_var(hv_24x7_hw); h24x7hw->events[i] = event; put_cpu_var(h24x7hw); - /* - * Clear the event count so we can compute the _change_ - * in the 24x7 raw counter value at the end of the txn. - * - * Note that we could alternatively read the 24x7 value - * now and save its value in event->hw.prev_count. But - * that would require issuing a hcall, which would then - * defeat the purpose of using the txn interface. - */ - local64_set(&event->count, 0); } put_cpu_var(hv_24x7_reqb); @@ -1615,6 +1689,8 @@ static int hv_24x7_init(void) if (r) return r; + read_24x7_sys_info(); + return 0; } |