powerpc/perf: Fix the PMU group constraints for threshold events in power10

[ Upstream commit 0263bbb377af0c2d38bc8b2ad2ff147e240094de ]

The PMU group constraints mask for threshold events covers
all thresholding bits which includes threshold control value
(start/stop), select value as well as thresh_cmp value (MMCRA[9:18].
In power9, thresh_cmp bits were part of the event code. But in case
of power10, thresh_cmp bits are not part of event code due to
inclusion of MMCR3 bits. Hence thresh_cmp is not valid for
group constraints for power10.

Fix the PMU group constraints checking for threshold events in
power10 by using constraint mask and value for only threshold control
and select bits.

Fixes: a64e697cef23 ("powerpc/perf: power10 Performance Monitoring support")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-4-git-send-email-atrajeev@linux.vnet.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c
index 38ed450..0f4983e 100644 (file)
--- a/arch/powerpc/perf/isa207-common.c
+++ b/arch/powerpc/perf/isa207-common.c
@@ -351,7 +351,12 @@ int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp)
                value |= CNST_SAMPLE_VAL(event >> EVENT_SAMPLE_SHIFT);
        }
 
-       if (cpu_has_feature(CPU_FTR_ARCH_300))  {
+       if (cpu_has_feature(CPU_FTR_ARCH_31)) {
+               if (event_is_threshold(event)) {
+                       mask  |= CNST_THRESH_CTL_SEL_MASK;
+                       value |= CNST_THRESH_CTL_SEL_VAL(event >> EVENT_THRESH_SHIFT);
+               }
+       } else if (cpu_has_feature(CPU_FTR_ARCH_300))  {
                if (event_is_threshold(event) && is_thresh_cmp_valid(event)) {
                        mask  |= CNST_THRESH_MASK;
                        value |= CNST_THRESH_VAL(event >> EVENT_THRESH_SHIFT);

diff --git a/arch/powerpc/perf/isa207-common.h b/arch/powerpc/perf/isa207-common.h
index dc9c3d2..4208764 100644 (file)
--- a/arch/powerpc/perf/isa207-common.h
+++ b/arch/powerpc/perf/isa207-common.h
@@ -149,6 +149,9 @@
 #define CNST_THRESH_VAL(v)     (((v) & EVENT_THRESH_MASK) << 32)
 #define CNST_THRESH_MASK       CNST_THRESH_VAL(EVENT_THRESH_MASK)
 
+#define CNST_THRESH_CTL_SEL_VAL(v)     (((v) & 0x7ffull) << 32)
+#define CNST_THRESH_CTL_SEL_MASK       CNST_THRESH_CTL_SEL_VAL(0x7ff)
+
 #define CNST_EBB_VAL(v)                (((v) & EVENT_EBB_MASK) << 24)
 #define CNST_EBB_MASK          CNST_EBB_VAL(EVENT_EBB_MASK)