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| author | Shannon Zhao <shannon.zhao@linaro.org> | 2015-09-11 04:38:32 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 21:34:19 +0300 |
| commit | 04fe472615d0216ec0bdd66d9f3f1812b642ada6 (patch) | |
| tree | 339f74fd09ca949f8a1dc910b43c08c70d2c89f6 /arch/arm64 | |
| parent | ad8821377384a2dfe3eae17dcf287b437f10ae03 (diff) | |
| download | linux-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 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 2 | ||||
| -rw-r--r-- | arch/arm64/kvm/Kconfig | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 15851f52096b..fb57fdc6a433 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -38,6 +38,7 @@ #include <kvm/arm_vgic.h> #include <kvm/arm_arch_timer.h> +#include <kvm/arm_pmu.h> #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS @@ -213,6 +214,7 @@ struct kvm_vcpu_arch { /* VGIC state */ struct vgic_cpu vgic_cpu; struct arch_timer_cpu timer_cpu; + struct kvm_pmu pmu; /* * Anything that is not used directly from assembly code goes diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index a5272c07d1cb..de7450df7629 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -36,6 +36,7 @@ config KVM select HAVE_KVM_EVENTFD select HAVE_KVM_IRQFD select KVM_ARM_VGIC_V3 + select KVM_ARM_PMU if HW_PERF_EVENTS ---help--- Support hosting virtualized guest machines. We don't support KVM with 16K page tables yet, due to the multiple @@ -48,6 +49,12 @@ config KVM_ARM_HOST ---help--- Provides host support for ARM processors. +config KVM_ARM_PMU + bool + ---help--- + Adds support for a virtual Performance Monitoring Unit (PMU) in + virtual machines. + source drivers/vhost/Kconfig endif # VIRTUALIZATION |