diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/powerpc/perf/core-book3s.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/powerpc/perf/core-book3s.c')
-rw-r--r-- | kernel/arch/powerpc/perf/core-book3s.c | 40 |
1 files changed, 32 insertions, 8 deletions
diff --git a/kernel/arch/powerpc/perf/core-book3s.c b/kernel/arch/powerpc/perf/core-book3s.c index d90893b76..d1e65ce54 100644 --- a/kernel/arch/powerpc/perf/core-book3s.c +++ b/kernel/arch/powerpc/perf/core-book3s.c @@ -48,12 +48,12 @@ struct cpu_hw_events { unsigned long amasks[MAX_HWEVENTS][MAX_EVENT_ALTERNATIVES]; unsigned long avalues[MAX_HWEVENTS][MAX_EVENT_ALTERNATIVES]; - unsigned int group_flag; + unsigned int txn_flags; int n_txn_start; /* BHRB bits */ u64 bhrb_filter; /* BHRB HW branch filter */ - int bhrb_users; + unsigned int bhrb_users; void *bhrb_context; struct perf_branch_stack bhrb_stack; struct perf_branch_entry bhrb_entries[BHRB_MAX_ENTRIES]; @@ -369,8 +369,8 @@ static void power_pmu_bhrb_disable(struct perf_event *event) if (!ppmu->bhrb_nr) return; + WARN_ON_ONCE(!cpuhw->bhrb_users); cpuhw->bhrb_users--; - WARN_ON_ONCE(cpuhw->bhrb_users < 0); perf_sched_cb_dec(event->ctx->pmu); if (!cpuhw->disabled && !cpuhw->bhrb_users) { @@ -1441,7 +1441,7 @@ static int power_pmu_add(struct perf_event *event, int ef_flags) * skip the schedulability test here, it will be performed * at commit time(->commit_txn) as a whole */ - if (cpuhw->group_flag & PERF_EVENT_TXN) + if (cpuhw->txn_flags & PERF_PMU_TXN_ADD) goto nocheck; if (check_excludes(cpuhw->event, cpuhw->flags, n0, 1)) @@ -1586,13 +1586,22 @@ static void power_pmu_stop(struct perf_event *event, int ef_flags) * Start group events scheduling transaction * Set the flag to make pmu::enable() not perform the * schedulability test, it will be performed at commit time + * + * We only support PERF_PMU_TXN_ADD transactions. Save the + * transaction flags but otherwise ignore non-PERF_PMU_TXN_ADD + * transactions. */ -static void power_pmu_start_txn(struct pmu *pmu) +static void power_pmu_start_txn(struct pmu *pmu, unsigned int txn_flags) { struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events); + WARN_ON_ONCE(cpuhw->txn_flags); /* txn already in flight */ + + cpuhw->txn_flags = txn_flags; + if (txn_flags & ~PERF_PMU_TXN_ADD) + return; + perf_pmu_disable(pmu); - cpuhw->group_flag |= PERF_EVENT_TXN; cpuhw->n_txn_start = cpuhw->n_events; } @@ -1604,8 +1613,15 @@ static void power_pmu_start_txn(struct pmu *pmu) static void power_pmu_cancel_txn(struct pmu *pmu) { struct cpu_hw_events *cpuhw = this_cpu_ptr(&cpu_hw_events); + unsigned int txn_flags; + + WARN_ON_ONCE(!cpuhw->txn_flags); /* no txn in flight */ + + txn_flags = cpuhw->txn_flags; + cpuhw->txn_flags = 0; + if (txn_flags & ~PERF_PMU_TXN_ADD) + return; - cpuhw->group_flag &= ~PERF_EVENT_TXN; perf_pmu_enable(pmu); } @@ -1621,7 +1637,15 @@ static int power_pmu_commit_txn(struct pmu *pmu) if (!ppmu) return -EAGAIN; + cpuhw = this_cpu_ptr(&cpu_hw_events); + WARN_ON_ONCE(!cpuhw->txn_flags); /* no txn in flight */ + + if (cpuhw->txn_flags & ~PERF_PMU_TXN_ADD) { + cpuhw->txn_flags = 0; + return 0; + } + n = cpuhw->n_events; if (check_excludes(cpuhw->event, cpuhw->flags, 0, n)) return -EAGAIN; @@ -1632,7 +1656,7 @@ static int power_pmu_commit_txn(struct pmu *pmu) for (i = cpuhw->n_txn_start; i < n; ++i) cpuhw->event[i]->hw.config = cpuhw->events[i]; - cpuhw->group_flag &= ~PERF_EVENT_TXN; + cpuhw->txn_flags = 0; perf_pmu_enable(pmu); return 0; } |