From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com, maz@kernel.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
qemu-devel@nongnu.org, qemu-arm@nongnu.org
Cc: andre.przywara@arm.com
Subject: [kvm-unit-tests RFC 03/10] pmu: Add a pmu struct
Date: Fri, 6 Dec 2019 18:27:17 +0100 [thread overview]
Message-ID: <20191206172724.947-4-eric.auger@redhat.com> (raw)
In-Reply-To: <20191206172724.947-1-eric.auger@redhat.com>
This struct aims at storing information potentially used by
all tests such as the pmu version, the read-only part of the
PMCR, the number of implemented event counters, ...
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
arm/pmu.c | 29 ++++++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)
diff --git a/arm/pmu.c b/arm/pmu.c
index 2ad6469..8e95251 100644
--- a/arm/pmu.c
+++ b/arm/pmu.c
@@ -33,7 +33,15 @@
#define NR_SAMPLES 10
-static unsigned int pmu_version;
+struct pmu {
+ unsigned int version;
+ unsigned int nb_implemented_counters;
+ uint32_t pmcr_ro;
+};
+
+static struct pmu pmu;
+
+
#if defined(__arm__)
#define ID_DFR0_PERFMON_SHIFT 24
#define ID_DFR0_PERFMON_MASK 0xf
@@ -265,7 +273,7 @@ static bool check_cpi(int cpi)
static void pmccntr64_test(void)
{
#ifdef __arm__
- if (pmu_version == 0x3) {
+ if (pmu.version == 0x3) {
if (ERRATA(9e3f7a296940)) {
write_sysreg(0xdead, PMCCNTR64);
report("pmccntr64", read_sysreg(PMCCNTR64) == 0xdead);
@@ -278,9 +286,20 @@ static void pmccntr64_test(void)
/* Return FALSE if no PMU found, otherwise return TRUE */
static bool pmu_probe(void)
{
- pmu_version = get_pmu_version();
- report_info("PMU version: %d", pmu_version);
- return pmu_version != 0 && pmu_version != 0xf;
+ uint32_t pmcr;
+
+ pmu.version = get_pmu_version();
+ report_info("PMU version: %d", pmu.version);
+
+ if (pmu.version == 0 || pmu.version == 0xF)
+ return false;
+
+ pmcr = get_pmcr();
+ pmu.pmcr_ro = pmcr & 0xFFFFFF80;
+ pmu.nb_implemented_counters = (pmcr >> PMU_PMCR_N_SHIFT) & PMU_PMCR_N_MASK;
+ report_info("Implements %d event counters", pmu.nb_implemented_counters);
+
+ return true;
}
int main(int argc, char *argv[])
--
2.20.1
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next prev parent reply other threads:[~2019-12-06 17:27 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-06 17:27 [kvm-unit-tests RFC 00/10] KVM: arm64: PMUv3 Event Counter Tests Eric Auger
2019-12-06 17:27 ` [kvm-unit-tests RFC 01/10] arm64: Provide read/write_sysreg_s Eric Auger
2019-12-06 17:36 ` Alexandru Elisei
2019-12-06 17:27 ` [kvm-unit-tests RFC 02/10] pmu: Let pmu tests take a sub-test parameter Eric Auger
2019-12-06 17:27 ` Eric Auger [this message]
2019-12-13 18:59 ` [kvm-unit-tests RFC 03/10] pmu: Add a pmu struct Andrew Jones
2019-12-06 17:27 ` [kvm-unit-tests RFC 04/10] pmu: Check Required Event Support Eric Auger
2019-12-13 19:10 ` Andrew Jones
2019-12-06 17:27 ` [kvm-unit-tests RFC 05/10] pmu: Basic event counter Tests Eric Auger
2019-12-06 17:27 ` [kvm-unit-tests RFC 06/10] pmu: Test chained counter Eric Auger
2019-12-06 17:27 ` [kvm-unit-tests RFC 07/10] arm: pmu: test 32-bit <-> 64-bit transitions Eric Auger
2019-12-06 17:27 ` [kvm-unit-tests RFC 08/10] arm: gic: Provide per-IRQ helper functions Eric Auger
2019-12-06 17:27 ` [kvm-unit-tests RFC 09/10] arm/arm64: gic: Introduce setup_irq() helper Eric Auger
2019-12-06 17:27 ` [kvm-unit-tests RFC 10/10] pmu: Test overflow interrupts Eric Auger
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