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authorShannon Zhao <shannon.zhao@linaro.org>2015-09-11 04:38:32 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2016-02-29 21:34:19 +0300
commit04fe472615d0216ec0bdd66d9f3f1812b642ada6 (patch)
tree339f74fd09ca949f8a1dc910b43c08c70d2c89f6 /include/kvm
parentad8821377384a2dfe3eae17dcf287b437f10ae03 (diff)
downloadlinux-04fe472615d0216ec0bdd66d9f3f1812b642ada6.tar.xz
arm64: KVM: Define PMU data structure for each vcpu
Here we plan to support virtual PMU for guest by full software emulation, so define some basic structs and functions preparing for futher steps. Define struct kvm_pmc for performance monitor counter and struct kvm_pmu for performance monitor unit for each vcpu. According to ARMv8 spec, the PMU contains at most 32(ARMV8_PMU_MAX_COUNTERS) counters. Since this only supports ARM64 (or PMUv3), add a separate config symbol for it. Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'include/kvm')
-rw-r--r--include/kvm/arm_pmu.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h
new file mode 100644
index 000000000000..3c2fd568e0a8
--- /dev/null
+++ b/include/kvm/arm_pmu.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 Linaro Ltd.
+ * Author: Shannon Zhao <shannon.zhao@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ASM_ARM_KVM_PMU_H
+#define __ASM_ARM_KVM_PMU_H
+
+#ifdef CONFIG_KVM_ARM_PMU
+
+#include <linux/perf_event.h>
+#include <asm/perf_event.h>
+
+struct kvm_pmc {
+ u8 idx; /* index into the pmu->pmc array */
+ struct perf_event *perf_event;
+ u64 bitmask;
+};
+
+struct kvm_pmu {
+ int irq_num;
+ struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
+ bool ready;
+};
+#else
+struct kvm_pmu {
+};
+#endif
+
+#endif