From: Raghavendra Rao Ananta <rananta@google.com>
To: Oliver Upton <oupton@google.com>,
Reiji Watanabe <reijiw@google.com>, Marc Zyngier <maz@kernel.org>,
Ricardo Koller <ricarkol@google.com>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Jing Zhang <jingzhangos@google.com>,
Colton Lewis <coltonlewis@google.com>,
Raghavendra Rao Anata <rananta@google.com>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH 04/13] selftests: KVM: aarch64: Add PMU cycle counter helpers
Date: Mon, 13 Feb 2023 18:02:25 +0000 [thread overview]
Message-ID: <20230213180234.2885032-5-rananta@google.com> (raw)
In-Reply-To: <20230213180234.2885032-1-rananta@google.com>
Add basic helpers for the test to access the cycle counter
registers. The helpers will be used in the upcoming patches
to run the tests related to cycle counter.
No functional change intended.
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
---
.../testing/selftests/kvm/aarch64/vpmu_test.c | 40 +++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/tools/testing/selftests/kvm/aarch64/vpmu_test.c b/tools/testing/selftests/kvm/aarch64/vpmu_test.c
index d72c3c9b9c39f..15aebc7d7dc94 100644
--- a/tools/testing/selftests/kvm/aarch64/vpmu_test.c
+++ b/tools/testing/selftests/kvm/aarch64/vpmu_test.c
@@ -147,6 +147,46 @@ static inline void disable_counter(int idx)
isb();
}
+static inline uint64_t read_cycle_counter(void)
+{
+ return read_sysreg(pmccntr_el0);
+}
+
+static inline void reset_cycle_counter(void)
+{
+ uint64_t v = read_sysreg(pmcr_el0);
+
+ write_sysreg(ARMV8_PMU_PMCR_C | v, pmcr_el0);
+ isb();
+}
+
+static inline void enable_cycle_counter(void)
+{
+ uint64_t v = read_sysreg(pmcntenset_el0);
+
+ write_sysreg(ARMV8_PMU_CNTENSET_C | v, pmcntenset_el0);
+ isb();
+}
+
+static inline void disable_cycle_counter(void)
+{
+ uint64_t v = read_sysreg(pmcntenset_el0);
+
+ write_sysreg(ARMV8_PMU_CNTENSET_C | v, pmcntenclr_el0);
+ isb();
+}
+
+static inline void write_pmccfiltr(unsigned long val)
+{
+ write_sysreg(val, pmccfiltr_el0);
+ isb();
+}
+
+static inline uint64_t read_pmccfiltr(void)
+{
+ return read_sysreg(pmccfiltr_el0);
+}
+
static inline uint64_t get_pmcr_n(void)
{
return FIELD_GET(ARMV8_PMU_PMCR_N, read_sysreg(pmcr_el0));
--
2.39.1.581.gbfd45094c4-goog
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next prev parent reply other threads:[~2023-02-13 18:04 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-13 18:02 [PATCH 00/13] Extend the vPMU selftest Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 01/13] selftests: KVM: aarch64: Rename vpmu_counter_access.c to vpmu_test.c Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 02/13] selftests: KVM: aarch64: Refactor the vPMU counter access tests Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 03/13] tools: arm64: perf_event: Define Cycle counter enable/overflow bits Raghavendra Rao Ananta
2023-02-13 18:02 ` Raghavendra Rao Ananta [this message]
2023-02-13 18:02 ` [PATCH 05/13] selftests: KVM: aarch64: Consider PMU event filters for VM creation Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 06/13] selftests: KVM: aarch64: Add KVM PMU event filter test Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 07/13] selftests: KVM: aarch64: Add KVM EVTYPE filter PMU test Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 08/13] selftests: KVM: aarch64: Add vCPU migration test for PMU Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 09/13] selftests: KVM: aarch64: Test PMU overflow/IRQ functionality Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 10/13] selftests: KVM: aarch64: Test chained events for PMU Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 11/13] selftests: KVM: aarch64: Add PMU test to chain all the counters Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 12/13] selftests: KVM: aarch64: Add multi-vCPU support for vPMU VM creation Raghavendra Rao Ananta
2023-02-13 18:02 ` [PATCH 13/13] selftests: KVM: aarch64: Extend the vCPU migration test to multi-vCPUs Raghavendra Rao Ananta
2023-02-13 23:39 ` [PATCH 00/13] Extend the vPMU selftest Raghavendra Rao Ananta
2023-02-14 8:19 ` Oliver Upton
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