diff options
Diffstat (limited to 'usr/src/uts/i86pc/os/mp_machdep.c')
| -rw-r--r-- | usr/src/uts/i86pc/os/mp_machdep.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/usr/src/uts/i86pc/os/mp_machdep.c b/usr/src/uts/i86pc/os/mp_machdep.c index 7470a1ef38..80e371850b 100644 --- a/usr/src/uts/i86pc/os/mp_machdep.c +++ b/usr/src/uts/i86pc/os/mp_machdep.c @@ -1,3 +1,4 @@ + /* * CDDL HEADER START * @@ -61,6 +62,7 @@ #include <sys/hpet.h> #include <sys/sunddi.h> #include <sys/sunndi.h> +#include <sys/cpc_pcbe.h> #define OFFSETOF(s, m) (size_t)(&(((s *)0)->m)) @@ -1680,3 +1682,37 @@ pg_cmt_affinity_hw(pghw_type_t hw) else return (0); } + +/* + * Return number of counter events requested to measure hardware capacity and + * utilization and setup CPC requests for specified CPU as needed + * + * May return 0 when platform or processor specific code knows that no CPC + * events should be programmed on this CPU or -1 when platform or processor + * specific code doesn't know which counter events are best to use and common + * code should decide for itself + */ +int +/* LINTED E_FUNC_ARG_UNUSED */ +cu_plat_cpc_init(cpu_t *cp, kcpc_request_list_t *reqs, int nreqs) +{ + const char *impl_name; + + /* + * Return error if pcbe_ops not set + */ + if (pcbe_ops == NULL) + return (-1); + + /* + * Return that no CPC events should be programmed on hyperthreaded + * Pentium 4 and return error for all other x86 processors to tell + * common code to decide what counter events to program on those CPUs + * for measuring hardware capacity and utilization + */ + impl_name = pcbe_ops->pcbe_impl_name(); + if (impl_name != NULL && strcmp(impl_name, PCBE_IMPL_NAME_P4HT) == 0) + return (0); + else + return (-1); +} |