From mboxrd@z Thu Jan 1 00:00:00 1970 From: zhaoshenglong@huawei.com (Shannon Zhao) Date: Fri, 11 Sep 2015 16:54:53 +0800 Subject: [PATCH v2 00/22] KVM: ARM64: Add guest PMU support Message-ID: <1441961715-11688-1-git-send-email-zhaoshenglong@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Shannon Zhao This patchset adds guest PMU support for KVM on ARM64. It takes trap-and-emulate approach. When guest wants to monitor one event, it will be trapped by KVM and KVM will call perf_event API to create a perf event and call relevant perf_event APIs to get the count value of event. Use perf to test this patchset in guest. When using "perf list", it shows the list of the hardware events and hardware cache events perf supports. Then use "perf stat -e EVENT" to monitor some event. For example, use "perf stat -e cycles" to count cpu cycles and "perf stat -e cache-misses" to count cache misses. Below are the outputs of "perf stat -r 5 sleep 5" when running in host and guest. Host: Performance counter stats for 'sleep 5' (5 runs): 0.551428 task-clock (msec) # 0.000 CPUs utilized ( +- 0.91% ) 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 48 page-faults # 0.088 M/sec ( +- 1.05% ) 1150265 cycles # 2.086 GHz ( +- 0.92% ) stalled-cycles-frontend stalled-cycles-backend 526398 instructions # 0.46 insns per cycle ( +- 0.89% ) branches 9485 branch-misses # 17.201 M/sec ( +- 2.35% ) 5.000831616 seconds time elapsed ( +- 0.00% ) Guest: Performance counter stats for 'sleep 5' (5 runs): 0.730868 task-clock (msec) # 0.000 CPUs utilized ( +- 1.13% ) 1 context-switches # 0.001 M/sec 0 cpu-migrations # 0.000 K/sec 48 page-faults # 0.065 M/sec ( +- 0.42% ) 1642982 cycles # 2.248 GHz ( +- 1.04% ) stalled-cycles-frontend stalled-cycles-backend 637964 instructions # 0.39 insns per cycle ( +- 0.65% ) branches 10377 branch-misses # 14.198 M/sec ( +- 1.09% ) 5.001289068 seconds time elapsed ( +- 0.00% ) This patchset can be fetched from [1] and the relevant QEMU version for test can be fetched from [2]. Thanks, Shannon [1] https://git.linaro.org/people/shannon.zhao/linux-mainline.git KVM_ARM64_PMU_v2 [2] https://git.linaro.org/people/shannon.zhao/qemu.git PMU_v2 Shannon Zhao (22): ARM64: Move PMU register related defines to asm/pmu.h KVM: ARM64: Define PMU data structure for each vcpu KVM: ARM64: Add offset defines for PMU registers KVM: ARM64: Add reset and access handlers for PMCR_EL0 register KVM: ARM64: Add a helper for CP15 registers reset to UNKNOWN KVM: ARM64: Add reset and access handlers for PMSELR register KVM: ARM64: Add reset and access handlers for PMCEID0 and PMCEID1 register KVM: ARM64: PMU: Add perf event map and introduce perf event creating function KVM: ARM64: Add reset and access handlers for PMXEVTYPER register KVM: ARM64: Add reset and access handlers for PMXEVCNTR register KVM: ARM64: Add reset and access handlers for PMCCNTR register KVM: ARM64: Add reset and access handlers for PMCNTENSET and PMCNTENCLR register KVM: ARM64: Add reset and access handlers for PMINTENSET and PMINTENCLR register KVM: ARM64: Add reset and access handlers for PMOVSSET and PMOVSCLR register KVM: ARM64: Add a helper for CP15 registers reset to specified value KVM: ARM64: Add reset and access handlers for PMUSERENR register KVM: ARM64: Add reset and access handlers for PMSWINC register KVM: ARM64: Add access handlers for PMEVCNTRn and PMEVTYPERn register KVM: ARM64: Add PMU overflow interrupt routing KVM: ARM64: Reset PMU state when resetting vcpu KVM: ARM64: Free perf event of PMU when destroying vcpu KVM: ARM64: Add a new kvm ARM PMU device Documentation/virtual/kvm/devices/arm-pmu.txt | 15 + arch/arm/kvm/arm.c | 4 + arch/arm64/include/asm/kvm_asm.h | 59 ++- arch/arm64/include/asm/kvm_host.h | 2 + arch/arm64/include/asm/pmu.h | 49 +++ arch/arm64/include/uapi/asm/kvm.h | 3 + arch/arm64/kernel/perf_event.c | 35 -- arch/arm64/kvm/Kconfig | 8 + arch/arm64/kvm/Makefile | 1 + arch/arm64/kvm/reset.c | 3 + arch/arm64/kvm/sys_regs.c | 490 +++++++++++++++++++++++-- arch/arm64/kvm/sys_regs.h | 16 + include/kvm/arm_pmu.h | 66 ++++ include/linux/kvm_host.h | 1 + include/uapi/linux/kvm.h | 2 + virt/kvm/arm/pmu.c | 500 ++++++++++++++++++++++++++ virt/kvm/kvm_main.c | 4 + 17 files changed, 1188 insertions(+), 70 deletions(-) create mode 100644 Documentation/virtual/kvm/devices/arm-pmu.txt create mode 100644 include/kvm/arm_pmu.h create mode 100644 virt/kvm/arm/pmu.c -- 2.0.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shannon Zhao Subject: [PATCH v2 00/22] KVM: ARM64: Add guest PMU support Date: Fri, 11 Sep 2015 16:54:53 +0800 Message-ID: <1441961715-11688-1-git-send-email-zhaoshenglong@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 16E2240FB3 for ; Fri, 11 Sep 2015 04:55:32 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hAl3t3uMStLO for ; Fri, 11 Sep 2015 04:55:30 -0400 (EDT) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [58.251.152.64]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 4778F40FA6 for ; Fri, 11 Sep 2015 04:55:28 -0400 (EDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: kvmarm@lists.cs.columbia.edu Cc: kvm@vger.kernel.org, marc.zyngier@arm.com, will.deacon@arm.com, linux-arm-kernel@lists.infradead.org, shannon.zhao@linaro.org List-Id: kvmarm@lists.cs.columbia.edu From: Shannon Zhao This patchset adds guest PMU support for KVM on ARM64. It takes trap-and-emulate approach. When guest wants to monitor one event, it will be trapped by KVM and KVM will call perf_event API to create a perf event and call relevant perf_event APIs to get the count value of event. Use perf to test this patchset in guest. When using "perf list", it shows the list of the hardware events and hardware cache events perf supports. Then use "perf stat -e EVENT" to monitor some event. For example, use "perf stat -e cycles" to count cpu cycles and "perf stat -e cache-misses" to count cache misses. Below are the outputs of "perf stat -r 5 sleep 5" when running in host and guest. Host: Performance counter stats for 'sleep 5' (5 runs): 0.551428 task-clock (msec) # 0.000 CPUs utilized ( +- 0.91% ) 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 48 page-faults # 0.088 M/sec ( +- 1.05% ) 1150265 cycles # 2.086 GHz ( +- 0.92% ) stalled-cycles-frontend stalled-cycles-backend 526398 instructions # 0.46 insns per cycle ( +- 0.89% ) branches 9485 branch-misses # 17.201 M/sec ( +- 2.35% ) 5.000831616 seconds time elapsed ( +- 0.00% ) Guest: Performance counter stats for 'sleep 5' (5 runs): 0.730868 task-clock (msec) # 0.000 CPUs utilized ( +- 1.13% ) 1 context-switches # 0.001 M/sec 0 cpu-migrations # 0.000 K/sec 48 page-faults # 0.065 M/sec ( +- 0.42% ) 1642982 cycles # 2.248 GHz ( +- 1.04% ) stalled-cycles-frontend stalled-cycles-backend 637964 instructions # 0.39 insns per cycle ( +- 0.65% ) branches 10377 branch-misses # 14.198 M/sec ( +- 1.09% ) 5.001289068 seconds time elapsed ( +- 0.00% ) This patchset can be fetched from [1] and the relevant QEMU version for test can be fetched from [2]. Thanks, Shannon [1] https://git.linaro.org/people/shannon.zhao/linux-mainline.git KVM_ARM64_PMU_v2 [2] https://git.linaro.org/people/shannon.zhao/qemu.git PMU_v2 Shannon Zhao (22): ARM64: Move PMU register related defines to asm/pmu.h KVM: ARM64: Define PMU data structure for each vcpu KVM: ARM64: Add offset defines for PMU registers KVM: ARM64: Add reset and access handlers for PMCR_EL0 register KVM: ARM64: Add a helper for CP15 registers reset to UNKNOWN KVM: ARM64: Add reset and access handlers for PMSELR register KVM: ARM64: Add reset and access handlers for PMCEID0 and PMCEID1 register KVM: ARM64: PMU: Add perf event map and introduce perf event creating function KVM: ARM64: Add reset and access handlers for PMXEVTYPER register KVM: ARM64: Add reset and access handlers for PMXEVCNTR register KVM: ARM64: Add reset and access handlers for PMCCNTR register KVM: ARM64: Add reset and access handlers for PMCNTENSET and PMCNTENCLR register KVM: ARM64: Add reset and access handlers for PMINTENSET and PMINTENCLR register KVM: ARM64: Add reset and access handlers for PMOVSSET and PMOVSCLR register KVM: ARM64: Add a helper for CP15 registers reset to specified value KVM: ARM64: Add reset and access handlers for PMUSERENR register KVM: ARM64: Add reset and access handlers for PMSWINC register KVM: ARM64: Add access handlers for PMEVCNTRn and PMEVTYPERn register KVM: ARM64: Add PMU overflow interrupt routing KVM: ARM64: Reset PMU state when resetting vcpu KVM: ARM64: Free perf event of PMU when destroying vcpu KVM: ARM64: Add a new kvm ARM PMU device Documentation/virtual/kvm/devices/arm-pmu.txt | 15 + arch/arm/kvm/arm.c | 4 + arch/arm64/include/asm/kvm_asm.h | 59 ++- arch/arm64/include/asm/kvm_host.h | 2 + arch/arm64/include/asm/pmu.h | 49 +++ arch/arm64/include/uapi/asm/kvm.h | 3 + arch/arm64/kernel/perf_event.c | 35 -- arch/arm64/kvm/Kconfig | 8 + arch/arm64/kvm/Makefile | 1 + arch/arm64/kvm/reset.c | 3 + arch/arm64/kvm/sys_regs.c | 490 +++++++++++++++++++++++-- arch/arm64/kvm/sys_regs.h | 16 + include/kvm/arm_pmu.h | 66 ++++ include/linux/kvm_host.h | 1 + include/uapi/linux/kvm.h | 2 + virt/kvm/arm/pmu.c | 500 ++++++++++++++++++++++++++ virt/kvm/kvm_main.c | 4 + 17 files changed, 1188 insertions(+), 70 deletions(-) create mode 100644 Documentation/virtual/kvm/devices/arm-pmu.txt create mode 100644 include/kvm/arm_pmu.h create mode 100644 virt/kvm/arm/pmu.c -- 2.0.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shannon Zhao Subject: [PATCH v2 00/22] KVM: ARM64: Add guest PMU support Date: Fri, 11 Sep 2015 16:54:53 +0800 Message-ID: <1441961715-11688-1-git-send-email-zhaoshenglong@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, marc.zyngier@arm.com, will.deacon@arm.com, linux-arm-kernel@lists.infradead.org, shannon.zhao@linaro.org To: Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org From: Shannon Zhao This patchset adds guest PMU support for KVM on ARM64. It takes trap-and-emulate approach. When guest wants to monitor one event, it will be trapped by KVM and KVM will call perf_event API to create a perf event and call relevant perf_event APIs to get the count value of event. Use perf to test this patchset in guest. When using "perf list", it shows the list of the hardware events and hardware cache events perf supports. Then use "perf stat -e EVENT" to monitor some event. For example, use "perf stat -e cycles" to count cpu cycles and "perf stat -e cache-misses" to count cache misses. Below are the outputs of "perf stat -r 5 sleep 5" when running in host and guest. Host: Performance counter stats for 'sleep 5' (5 runs): 0.551428 task-clock (msec) # 0.000 CPUs utilized ( +- 0.91% ) 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 48 page-faults # 0.088 M/sec ( +- 1.05% ) 1150265 cycles # 2.086 GHz ( +- 0.92% ) stalled-cycles-frontend stalled-cycles-backend 526398 instructions # 0.46 insns per cycle ( +- 0.89% ) branches 9485 branch-misses # 17.201 M/sec ( +- 2.35% ) 5.000831616 seconds time elapsed ( +- 0.00% ) Guest: Performance counter stats for 'sleep 5' (5 runs): 0.730868 task-clock (msec) # 0.000 CPUs utilized ( +- 1.13% ) 1 context-switches # 0.001 M/sec 0 cpu-migrations # 0.000 K/sec 48 page-faults # 0.065 M/sec ( +- 0.42% ) 1642982 cycles # 2.248 GHz ( +- 1.04% ) stalled-cycles-frontend stalled-cycles-backend 637964 instructions # 0.39 insns per cycle ( +- 0.65% ) branches 10377 branch-misses # 14.198 M/sec ( +- 1.09% ) 5.001289068 seconds time elapsed ( +- 0.00% ) This patchset can be fetched from [1] and the relevant QEMU version for test can be fetched from [2]. Thanks, Shannon [1] https://git.linaro.org/people/shannon.zhao/linux-mainline.git KVM_ARM64_PMU_v2 [2] https://git.linaro.org/people/shannon.zhao/qemu.git PMU_v2 Shannon Zhao (22): ARM64: Move PMU register related defines to asm/pmu.h KVM: ARM64: Define PMU data structure for each vcpu KVM: ARM64: Add offset defines for PMU registers KVM: ARM64: Add reset and access handlers for PMCR_EL0 register KVM: ARM64: Add a helper for CP15 registers reset to UNKNOWN KVM: ARM64: Add reset and access handlers for PMSELR register KVM: ARM64: Add reset and access handlers for PMCEID0 and PMCEID1 register KVM: ARM64: PMU: Add perf event map and introduce perf event creating function KVM: ARM64: Add reset and access handlers for PMXEVTYPER register KVM: ARM64: Add reset and access handlers for PMXEVCNTR register KVM: ARM64: Add reset and access handlers for PMCCNTR register KVM: ARM64: Add reset and access handlers for PMCNTENSET and PMCNTENCLR register KVM: ARM64: Add reset and access handlers for PMINTENSET and PMINTENCLR register KVM: ARM64: Add reset and access handlers for PMOVSSET and PMOVSCLR register KVM: ARM64: Add a helper for CP15 registers reset to specified value KVM: ARM64: Add reset and access handlers for PMUSERENR register KVM: ARM64: Add reset and access handlers for PMSWINC register KVM: ARM64: Add access handlers for PMEVCNTRn and PMEVTYPERn register KVM: ARM64: Add PMU overflow interrupt routing KVM: ARM64: Reset PMU state when resetting vcpu KVM: ARM64: Free perf event of PMU when destroying vcpu KVM: ARM64: Add a new kvm ARM PMU device Documentation/virtual/kvm/devices/arm-pmu.txt | 15 + arch/arm/kvm/arm.c | 4 + arch/arm64/include/asm/kvm_asm.h | 59 ++- arch/arm64/include/asm/kvm_host.h | 2 + arch/arm64/include/asm/pmu.h | 49 +++ arch/arm64/include/uapi/asm/kvm.h | 3 + arch/arm64/kernel/perf_event.c | 35 -- arch/arm64/kvm/Kconfig | 8 + arch/arm64/kvm/Makefile | 1 + arch/arm64/kvm/reset.c | 3 + arch/arm64/kvm/sys_regs.c | 490 +++++++++++++++++++++++-- arch/arm64/kvm/sys_regs.h | 16 + include/kvm/arm_pmu.h | 66 ++++ include/linux/kvm_host.h | 1 + include/uapi/linux/kvm.h | 2 + virt/kvm/arm/pmu.c | 500 ++++++++++++++++++++++++++ virt/kvm/kvm_main.c | 4 + 17 files changed, 1188 insertions(+), 70 deletions(-) create mode 100644 Documentation/virtual/kvm/devices/arm-pmu.txt create mode 100644 include/kvm/arm_pmu.h create mode 100644 virt/kvm/arm/pmu.c -- 2.0.4