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| author | jkoshy <jkoshy@FreeBSD.org> | 2006-03-28 14:09:21 +0000 |
|---|---|---|
| committer | jkoshy <jkoshy@FreeBSD.org> | 2006-03-28 14:09:21 +0000 |
| commit | 1ad16902d3017361d09d7c25f43e5f0b09de33d2 (patch) | |
| tree | 52f8ee06ed33e60e13442e94a1b1404a58ee9b74 /sys | |
| parent | b5db288bf69a4cfb9c1c4cf659bfd91b9f8052b7 (diff) | |
| download | FreeBSD-src-1ad16902d3017361d09d7c25f43e5f0b09de33d2.zip FreeBSD-src-1ad16902d3017361d09d7c25f43e5f0b09de33d2.tar.gz | |
Forcibly turn off all PMCs at module unload time.
MFC after: 1 week
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/hwpmc/hwpmc_piv.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/dev/hwpmc/hwpmc_piv.c b/sys/dev/hwpmc/hwpmc_piv.c index f0701c8..1a98a3d 100644 --- a/sys/dev/hwpmc/hwpmc_piv.c +++ b/sys/dev/hwpmc/hwpmc_piv.c @@ -674,6 +674,7 @@ p4_init(int cpu) static int p4_cleanup(int cpu) { + int i; struct p4_cpu *pcs; PMCDBG(MDP,INI,0, "p4-cleanup cpu=%d", cpu); @@ -681,6 +682,11 @@ p4_cleanup(int cpu) if ((pcs = (struct p4_cpu *) pmc_pcpu[cpu]) == NULL) return 0; + /* Turn off all PMCs on this CPU */ + for (i = 0; i < P4_NPMCS - 1; i++) + wrmsr(P4_CCCR_MSR_FIRST + i, + rdmsr(P4_CCCR_MSR_FIRST + i) & ~P4_CCCR_ENABLE); + /* * If the CPU is physical we need to teardown the * full MD state. |
