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| author | Amit Tomar <amittomer25@gmail.com> | 2015-11-26 10:09:43 +0000 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-12-14 11:30:00 +0000 |
| commit | b19e6892a90e7c9d15fde0a08516ec891a4e7d54 (patch) | |
| tree | fb7416f7a164ef16e0280a56288d2cc79ab696f2 /arch/arm/kvm | |
| parent | 8cdb654abe5730654d0385382c4e877a011bb8c8 (diff) | |
| download | op-kernel-dev-b19e6892a90e7c9d15fde0a08516ec891a4e7d54.zip op-kernel-dev-b19e6892a90e7c9d15fde0a08516ec891a4e7d54.tar.gz | |
KVM: arm/arm64: Count guest exit due to various reasons
It would add guest exit statistics to debugfs, this can be helpful
while measuring KVM performance.
[ Renamed some of the field names - Christoffer ]
Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm/kvm')
| -rw-r--r-- | arch/arm/kvm/arm.c | 1 | ||||
| -rw-r--r-- | arch/arm/kvm/guest.c | 6 | ||||
| -rw-r--r-- | arch/arm/kvm/handle_exit.c | 3 | ||||
| -rw-r--r-- | arch/arm/kvm/mmio.c | 3 |
4 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index e06fd29..8a79a57 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -603,6 +603,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) ret = kvm_call_hyp(__kvm_vcpu_run, vcpu); vcpu->mode = OUTSIDE_GUEST_MODE; + vcpu->stat.exits++; /* * Back from guest *************************************************************/ diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index 96e935b..5fa69d7 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -33,6 +33,12 @@ #define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU } struct kvm_stats_debugfs_item debugfs_entries[] = { + VCPU_STAT(hvc_exit_stat), + VCPU_STAT(wfe_exit_stat), + VCPU_STAT(wfi_exit_stat), + VCPU_STAT(mmio_exit_user), + VCPU_STAT(mmio_exit_kernel), + VCPU_STAT(exits), { NULL } }; diff --git a/arch/arm/kvm/handle_exit.c b/arch/arm/kvm/handle_exit.c index 95f12b2..3ede90d 100644 --- a/arch/arm/kvm/handle_exit.c +++ b/arch/arm/kvm/handle_exit.c @@ -42,6 +42,7 @@ static int handle_hvc(struct kvm_vcpu *vcpu, struct kvm_run *run) trace_kvm_hvc(*vcpu_pc(vcpu), *vcpu_reg(vcpu, 0), kvm_vcpu_hvc_get_imm(vcpu)); + vcpu->stat.hvc_exit_stat++; ret = kvm_psci_call(vcpu); if (ret < 0) { @@ -89,9 +90,11 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run) { if (kvm_vcpu_get_hsr(vcpu) & HSR_WFI_IS_WFE) { trace_kvm_wfx(*vcpu_pc(vcpu), true); + vcpu->stat.wfe_exit_stat++; kvm_vcpu_on_spin(vcpu); } else { trace_kvm_wfx(*vcpu_pc(vcpu), false); + vcpu->stat.wfi_exit_stat++; kvm_vcpu_block(vcpu); } diff --git a/arch/arm/kvm/mmio.c b/arch/arm/kvm/mmio.c index 3a10c9f..7f33b20 100644 --- a/arch/arm/kvm/mmio.c +++ b/arch/arm/kvm/mmio.c @@ -210,8 +210,11 @@ int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run, if (!ret) { /* We handled the access successfully in the kernel. */ + vcpu->stat.mmio_exit_kernel++; kvm_handle_mmio_return(vcpu, run); return 1; + } else { + vcpu->stat.mmio_exit_user++; } run->exit_reason = KVM_EXIT_MMIO; |
