Date: Sat, 24 Oct 2009 01:58:10 +0000 (UTC) From: Joseph Koshy <jkoshy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r198432 - head/sys/dev/hwpmc Message-ID: <200910240158.n9O1wANG077985@svn.freebsd.org>
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Author: jkoshy Date: Sat Oct 24 01:58:10 2009 New Revision: 198432 URL: http://svn.freebsd.org/changeset/base/198432 Log: Only claim that the PMC_CLASS_IAF PMCs are supported by a CPU if there are PMCs on the CPU that belong to the class. Review and testing by: fabient Modified: head/sys/dev/hwpmc/hwpmc_core.c Modified: head/sys/dev/hwpmc/hwpmc_core.c ============================================================================== --- head/sys/dev/hwpmc/hwpmc_core.c Fri Oct 23 22:53:01 2009 (r198431) +++ head/sys/dev/hwpmc/hwpmc_core.c Sat Oct 24 01:58:10 2009 (r198432) @@ -1977,11 +1977,21 @@ pmc_core_initialize(struct pmc_mdep *md, 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,
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