perf_counter: powerpc: use u64 for event codes internally
Although the perf_counter API allows 63-bit raw event codes,
internally in the powerpc back-end we had been using 32-bit
event codes. This expands them to 64 bits so that we can add
bits for specifying threshold start/stop events and instruction
sampling modes later.
This also corrects the return value of can_go_on_limited_pmc;
we were returning an event code rather than just a 0/1 value in
some circumstances. That didn't particularly matter while event
codes were 32-bit, but now that event codes are 64-bit it
might, so this fixes it.
[ Impact: extend PowerPC perfcounter interfaces from u32 to u64 ]
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <18955.36874.472452.353104@drongo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/powerpc/kernel/power5+-pmu.c b/arch/powerpc/kernel/power5+-pmu.c
index 8154eaa..3ac0654 100644
--- a/arch/powerpc/kernel/power5+-pmu.c
+++ b/arch/powerpc/kernel/power5+-pmu.c
@@ -135,7 +135,7 @@
[PM_GRS] = { 0x0e00000000ull, 0x0c40000000ull },
};
-static int power5p_get_constraint(unsigned int event, u64 *maskp, u64 *valp)
+static int power5p_get_constraint(u64 event, u64 *maskp, u64 *valp)
{
int pmc, byte, unit, sh;
int bit, fmask;
@@ -188,7 +188,7 @@
return 0;
}
-static int power5p_limited_pmc_event(unsigned int event)
+static int power5p_limited_pmc_event(u64 event)
{
int pmc = (event >> PM_PMC_SH) & PM_PMC_MSK;
@@ -273,11 +273,11 @@
return -1;
}
-static int power5p_get_alternatives(unsigned int event, unsigned int flags,
- unsigned int alt[])
+static int power5p_get_alternatives(u64 event, unsigned int flags, u64 alt[])
{
- int i, j, ae, nalt = 1;
+ int i, j, nalt = 1;
int nlim;
+ u64 ae;
alt[0] = event;
nalt = 1;
@@ -402,7 +402,7 @@
* Returns 1 if event counts things relating to marked instructions
* and thus needs the MMCRA_SAMPLE_ENABLE bit set, or 0 if not.
*/
-static int power5p_marked_instr_event(unsigned int event)
+static int power5p_marked_instr_event(u64 event)
{
int pmc, psel;
int bit, byte, unit;
@@ -451,7 +451,7 @@
return (mask >> (byte * 8 + bit)) & 1;
}
-static int power5p_compute_mmcr(unsigned int event[], int n_ev,
+static int power5p_compute_mmcr(u64 event[], int n_ev,
unsigned int hwc[], u64 mmcr[])
{
u64 mmcr1 = 0;