From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58660) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZhjpJ-0008GY-H9 for qemu-devel@nongnu.org; Thu, 01 Oct 2015 15:47:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZhjpG-0005Rn-Ad for qemu-devel@nongnu.org; Thu, 01 Oct 2015 15:47:37 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:58528) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZhjpG-0005RR-67 for qemu-devel@nongnu.org; Thu, 01 Oct 2015 15:47:34 -0400 From: Christopher Covington Date: Thu, 1 Oct 2015 15:47:21 -0400 Message-Id: <1443728841-10501-1-git-send-email-cov@codeaurora.org> Subject: [Qemu-devel] [PATCH] arm: Add PMU test List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: drjones@redhat.com, qemu-devel@nongnu.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: shannon.zhao@linaro.org, Christopher Covington Beginning with just a read of the control register, add plumbing for testing the ARM Performance Monitors Unit (PMU). Signed-off-by: Christopher Covington --- arm/pmu.c | 31 +++++++++++++++++++++++++++++++ arm/unittests.cfg | 5 +++++ config/config-arm-common.mak | 4 +++- 3 files changed, 39 insertions(+), 1 deletion(-) create mode 100644 arm/pmu.c diff --git a/arm/pmu.c b/arm/pmu.c new file mode 100644 index 0000000..b1e3c7a --- /dev/null +++ b/arm/pmu.c @@ -0,0 +1,31 @@ +#include "libcflat.h" + +union pmcr_el0 { + struct { + unsigned int implementor:8; + unsigned int identification_code:8; + unsigned int num_counters:5; + unsigned int zeros:4; + unsigned int cycle_counter_long:1; + unsigned int cycle_counter_disable_when_prohibited:1; + unsigned int event_counter_export:1; + unsigned int cycle_counter_clock_divider:1; + unsigned int cycle_counter_reset:1; + unsigned int event_counter_reset:1; + unsigned int enable:1; + } split; + uint32_t full; +}; + +int main() +{ + union pmcr_el0 pmcr; + + asm volatile("mrs %0, pmcr_el0\n" : "=r" (pmcr)); + + printf("PMU implementor: 0x%x\n", pmcr.split.implementor); + printf("Identification code: 0x%x\n", pmcr.split.identification_code); + printf("Event counters: %d\n", pmcr.split.num_counters); + + return report_summary(); +} diff --git a/arm/unittests.cfg b/arm/unittests.cfg index e068a0c..d3deb6a 100644 --- a/arm/unittests.cfg +++ b/arm/unittests.cfg @@ -35,3 +35,8 @@ file = selftest.flat smp = `getconf _NPROCESSORS_CONF` extra_params = -append 'smp' groups = selftest + +# Test PMU support +[pmu] +file = pmu.flat +groups = pmu diff --git a/config/config-arm-common.mak b/config/config-arm-common.mak index 698555d..b34d04c 100644 --- a/config/config-arm-common.mak +++ b/config/config-arm-common.mak @@ -11,7 +11,8 @@ endif tests-common = \ $(TEST_DIR)/selftest.flat \ - $(TEST_DIR)/spinlock-test.flat + $(TEST_DIR)/spinlock-test.flat \ + $(TEST_DIR)/pmu.flat all: test_cases @@ -70,3 +71,4 @@ test_cases: $(generated_files) $(tests-common) $(tests) $(TEST_DIR)/selftest.elf: $(cstart.o) $(TEST_DIR)/selftest.o $(TEST_DIR)/spinlock-test.elf: $(cstart.o) $(TEST_DIR)/spinlock-test.o +$(TEST_DIR)/pmu.elf: $(cstart.o) $(TEST_DIR)/pmu.o -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project