diff options
Diffstat (limited to 'sys/dev/hwpmc')
| -rw-r--r-- | sys/dev/hwpmc/hwpmc_core.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/sys/dev/hwpmc/hwpmc_core.c b/sys/dev/hwpmc/hwpmc_core.c index d4f065b..b6de04d 100644 --- a/sys/dev/hwpmc/hwpmc_core.c +++ b/sys/dev/hwpmc/hwpmc_core.c @@ -1977,11 +1977,21 @@ pmc_core_initialize(struct pmc_mdep *md, int maxcpu) core_iaf_npmc = cpuid[CORE_CPUID_EDX] & 0x1F; core_iaf_width = (cpuid[CORE_CPUID_EDX] >> 5) & 0xFF; - iaf_initialize(md, maxcpu, core_iaf_npmc, core_iaf_width); - - core_pmcmask |= ((1ULL << core_iaf_npmc) - 1) << - IAF_OFFSET; - + if (core_iaf_npmc > 0) { + iaf_initialize(md, maxcpu, core_iaf_npmc, + core_iaf_width); + core_pmcmask |= ((1ULL << core_iaf_npmc) - 1) << + IAF_OFFSET; + } else { + /* + * Adjust the number of classes exported to + * user space. + */ + md->pmd_nclass--; + KASSERT(md->pmd_nclass == 2, + ("[core,%d] unexpected nclass %d", __LINE__, + md->pmd_nclass)); + } } PMCDBG(MDP,INI,1,"core-init pmcmask=0x%jx iafri=%d", core_pmcmask, |
