From patchwork Mon May 24 15:18:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 1482843 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=U4zZ0Zvb; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Fphqz4M9Dz9tjs for ; Tue, 25 May 2021 02:05:03 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234094AbhEXQG3 (ORCPT ); Mon, 24 May 2021 12:06:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53166 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237142AbhEXQFL (ORCPT ); Mon, 24 May 2021 12:05:11 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17FAAC06129F for ; Mon, 24 May 2021 08:18:34 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id b17-20020a63eb510000b029021a1da627beso18942253pgk.12 for ; Mon, 24 May 2021 08:18:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=wDL5RTgfl0o/mZVtkll5xaYs0miQ+wZka/RXxsYXSrQ=; b=U4zZ0Zvbu6rmE5ylvjH3k4VZTvfpZYGZshpleIhtCBtyIKgoPWSo8Xs2rt0JZ9DUwi nbEqX/cTkfvqMucG2QZ0E9prRRZV2vOBWcOqhFZjFGzCPQciXhBbeiRLLk+oPnGJszTL x5/CPxtGna06yX5KPLHvymyYvY7F7mNmed016SRySg3Y6zdMqH8H2A0IU9GzJfE0V+IS 8yeUzjIP0lo6iDbVmydOoWexWGafsuWoOtRa6NvtCB3KA8VCZTfbIc/3U8W2Ri3+q9RM SJgXNI4Wd1MBeXKp/x+LGpzP0kj8wH9L1NV+wnVgYMlVYXg8oNDhtKsAWWkYu9mEcO/I AEyA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=wDL5RTgfl0o/mZVtkll5xaYs0miQ+wZka/RXxsYXSrQ=; b=lUM+foKPPGVf4/Ejpc6oPpz5JMhg6pJ/MZchhOFUXdfBEFdo6fHUrTnpgX162fLQ2x 3Dk91Pv2KGZXEosimBAK/bO6Coi8pAJnyfj3JPRG1WHEmeW0DGMWZFtvdVS3yGuwYMAh mfVyBlm1NxcsfHMkt0tY3O+nlxLQUGOz7RNVL1ArJAJluSse5/ylvDhRC41f0cVe1m29 QIDQBfZDmYC5T2f6/6JzLYMQ0oB/WN6m1/90vnqzfOhf0FK3EJazdbJ6/KLUGuUEUPpw 1rcedUJls712ii6PZuYZS/iOi4vtmpgK6Sz2fg6B/ZdPo472y5MbksngPQeuY1Y7fcrT /dww== X-Gm-Message-State: AOAM530r3hKSGKjRlXdxaWRnCb98pDsCgNiG4F6rWAYouatdcN/+5VAB N5tV8luegSx9DpWbep38O2rjBzKP/Ny0KJI7Fg== X-Google-Smtp-Source: ABdhPJxMEJ1Y+P3h4wUrU3KxKDwB+gVHeOoDhwK7DLLc9PXJZI8MihT5BWSnPGZNIwV/XE4mduUuNR4ko3bmUOEi/g== X-Received: from jgzg.c.googlers.com ([fda3:e722:ac3:10:7f:e700:c0a8:1acf]) (user=jingzhangos job=sendgmr) by 2002:a62:bd14:0:b029:2de:8bf7:2df8 with SMTP id a20-20020a62bd140000b02902de8bf72df8mr25068926pff.60.1621869513504; Mon, 24 May 2021 08:18:33 -0700 (PDT) Date: Mon, 24 May 2021 15:18:25 +0000 In-Reply-To: <20210524151828.4113777-1-jingzhangos@google.com> Message-Id: <20210524151828.4113777-2-jingzhangos@google.com> Mime-Version: 1.0 References: <20210524151828.4113777-1-jingzhangos@google.com> X-Mailer: git-send-email 2.31.1.818.g46aad6cb9e-goog Subject: [PATCH v6 1/4] KVM: stats: Separate common stats from architecture specific ones From: Jing Zhang To: KVM , KVMARM , LinuxMIPS , KVMPPC , LinuxS390 , Linuxkselftest , Paolo Bonzini , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Will Deacon , Huacai Chen , Aleksandar Markovic , Thomas Bogendoerfer , Paul Mackerras , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Jim Mattson , Peter Shier , Oliver Upton , David Rientjes , Emanuele Giuseppe Esposito , David Matlack , Ricardo Koller , Krish Sadhukhan Cc: Jing Zhang Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Put all common statistics in a separate structure to ease statistics handling for the incoming new statistics API. No functional change intended. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Signed-off-by: Jing Zhang Reviewed-by: David Matlack --- arch/arm64/include/asm/kvm_host.h | 9 ++------- arch/arm64/kvm/guest.c | 12 ++++++------ arch/mips/include/asm/kvm_host.h | 9 ++------- arch/mips/kvm/mips.c | 12 ++++++------ arch/powerpc/include/asm/kvm_host.h | 9 ++------- arch/powerpc/kvm/book3s.c | 12 ++++++------ arch/powerpc/kvm/book3s_hv.c | 12 ++++++------ arch/powerpc/kvm/book3s_pr.c | 2 +- arch/powerpc/kvm/book3s_pr_papr.c | 2 +- arch/powerpc/kvm/booke.c | 14 +++++++------- arch/s390/include/asm/kvm_host.h | 9 ++------- arch/s390/kvm/kvm-s390.c | 12 ++++++------ arch/x86/include/asm/kvm_host.h | 9 ++------- arch/x86/kvm/x86.c | 14 +++++++------- include/linux/kvm_host.h | 9 +++++++-- include/linux/kvm_types.h | 12 ++++++++++++ virt/kvm/kvm_main.c | 14 +++++++------- 17 files changed, 82 insertions(+), 90 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 7cd7d5c8c4bc..f3ad7a20b0af 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -556,16 +556,11 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) } struct kvm_vm_stat { - ulong remote_tlb_flush; + struct kvm_vm_stat_common common; }; struct kvm_vcpu_stat { - u64 halt_successful_poll; - u64 halt_attempted_poll; - u64 halt_poll_success_ns; - u64 halt_poll_fail_ns; - u64 halt_poll_invalid; - u64 halt_wakeup; + struct kvm_vcpu_stat_common common; u64 hvc_exit_stat; u64 wfe_exit_stat; u64 wfi_exit_stat; diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 5cb4a1cd5603..0e41331b0911 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -29,18 +29,18 @@ #include "trace.h" struct kvm_stats_debugfs_item debugfs_entries[] = { - VCPU_STAT("halt_successful_poll", halt_successful_poll), - VCPU_STAT("halt_attempted_poll", halt_attempted_poll), - VCPU_STAT("halt_poll_invalid", halt_poll_invalid), - VCPU_STAT("halt_wakeup", halt_wakeup), + VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), + VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), + VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid), + VCPU_STAT_COM("halt_wakeup", halt_wakeup), VCPU_STAT("hvc_exit_stat", hvc_exit_stat), VCPU_STAT("wfe_exit_stat", wfe_exit_stat), VCPU_STAT("wfi_exit_stat", wfi_exit_stat), VCPU_STAT("mmio_exit_user", mmio_exit_user), VCPU_STAT("mmio_exit_kernel", mmio_exit_kernel), VCPU_STAT("exits", exits), - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), + VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns), + VCPU_STAT_COM("halt_poll_fail_ns", halt_poll_fail_ns), { NULL } }; diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index fca4547d580f..6f610fbcd8d1 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -109,10 +109,11 @@ static inline bool kvm_is_error_hva(unsigned long addr) } struct kvm_vm_stat { - ulong remote_tlb_flush; + struct kvm_vm_stat_common common; }; struct kvm_vcpu_stat { + struct kvm_vcpu_stat_common common; u64 wait_exits; u64 cache_exits; u64 signal_exits; @@ -142,12 +143,6 @@ struct kvm_vcpu_stat { #ifdef CONFIG_CPU_LOONGSON64 u64 vz_cpucfg_exits; #endif - u64 halt_successful_poll; - u64 halt_attempted_poll; - u64 halt_poll_success_ns; - u64 halt_poll_fail_ns; - u64 halt_poll_invalid; - u64 halt_wakeup; }; struct kvm_arch_memory_slot { diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index 4d4af97dcc88..f4fc60c05e9c 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -68,12 +68,12 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { #ifdef CONFIG_CPU_LOONGSON64 VCPU_STAT("vz_cpucfg", vz_cpucfg_exits), #endif - VCPU_STAT("halt_successful_poll", halt_successful_poll), - VCPU_STAT("halt_attempted_poll", halt_attempted_poll), - VCPU_STAT("halt_poll_invalid", halt_poll_invalid), - VCPU_STAT("halt_wakeup", halt_wakeup), - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), + VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), + VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), + VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid), + VCPU_STAT_COM("halt_wakeup", halt_wakeup), + VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns), + VCPU_STAT_COM("halt_poll_fail_ns", halt_poll_fail_ns), {NULL} }; diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 1e83359f286b..473d9d0804ff 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -80,12 +80,13 @@ struct kvmppc_book3s_shadow_vcpu; struct kvm_nested_guest; struct kvm_vm_stat { - ulong remote_tlb_flush; + struct kvm_vm_stat_common common; ulong num_2M_pages; ulong num_1G_pages; }; struct kvm_vcpu_stat { + struct kvm_vcpu_stat_common common; u64 sum_exits; u64 mmio_exits; u64 signal_exits; @@ -101,14 +102,8 @@ struct kvm_vcpu_stat { u64 emulated_inst_exits; u64 dec_exits; u64 ext_intr_exits; - u64 halt_poll_success_ns; - u64 halt_poll_fail_ns; u64 halt_wait_ns; - u64 halt_successful_poll; - u64 halt_attempted_poll; u64 halt_successful_wait; - u64 halt_poll_invalid; - u64 halt_wakeup; u64 dbell_exits; u64 gdbell_exits; u64 ld; diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 2b691f4d1f26..bd3a10e1fdaf 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -47,14 +47,14 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("dec", dec_exits), VCPU_STAT("ext_intr", ext_intr_exits), VCPU_STAT("queue_intr", queue_intr), - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), + VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns), + VCPU_STAT_COM("halt_poll_fail_ns", halt_poll_fail_ns), VCPU_STAT("halt_wait_ns", halt_wait_ns), - VCPU_STAT("halt_successful_poll", halt_successful_poll), - VCPU_STAT("halt_attempted_poll", halt_attempted_poll), + VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), + VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), VCPU_STAT("halt_successful_wait", halt_successful_wait), - VCPU_STAT("halt_poll_invalid", halt_poll_invalid), - VCPU_STAT("halt_wakeup", halt_wakeup), + VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid), + VCPU_STAT_COM("halt_wakeup", halt_wakeup), VCPU_STAT("pf_storage", pf_storage), VCPU_STAT("sp_storage", sp_storage), VCPU_STAT("pf_instruc", pf_instruc), diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 28a80d240b76..58e187e03c52 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -236,7 +236,7 @@ static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) waitp = kvm_arch_vcpu_get_wait(vcpu); if (rcuwait_wake_up(waitp)) - ++vcpu->stat.halt_wakeup; + ++vcpu->stat.common.halt_wakeup; cpu = READ_ONCE(vcpu->arch.thread_cpu); if (cpu >= 0 && kvmppc_ipi_thread(cpu)) @@ -3925,7 +3925,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) cur = start_poll = ktime_get(); if (vc->halt_poll_ns) { ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns); - ++vc->runner->stat.halt_attempted_poll; + ++vc->runner->stat.common.halt_attempted_poll; vc->vcore_state = VCORE_POLLING; spin_unlock(&vc->lock); @@ -3942,7 +3942,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) vc->vcore_state = VCORE_INACTIVE; if (!do_sleep) { - ++vc->runner->stat.halt_successful_poll; + ++vc->runner->stat.common.halt_successful_poll; goto out; } } @@ -3954,7 +3954,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) do_sleep = 0; /* If we polled, count this as a successful poll */ if (vc->halt_poll_ns) - ++vc->runner->stat.halt_successful_poll; + ++vc->runner->stat.common.halt_successful_poll; goto out; } @@ -3981,13 +3981,13 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) ktime_to_ns(cur) - ktime_to_ns(start_wait); /* Attribute failed poll time */ if (vc->halt_poll_ns) - vc->runner->stat.halt_poll_fail_ns += + vc->runner->stat.common.halt_poll_fail_ns += ktime_to_ns(start_wait) - ktime_to_ns(start_poll); } else { /* Attribute successful poll time */ if (vc->halt_poll_ns) - vc->runner->stat.halt_poll_success_ns += + vc->runner->stat.common.halt_poll_success_ns += ktime_to_ns(cur) - ktime_to_ns(start_poll); } diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index d7733b07f489..214caa9d9675 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -493,7 +493,7 @@ static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64 msr) if (!vcpu->arch.pending_exceptions) { kvm_vcpu_block(vcpu); kvm_clear_request(KVM_REQ_UNHALT, vcpu); - vcpu->stat.halt_wakeup++; + vcpu->stat.common.halt_wakeup++; /* Unset POW bit after we woke up */ msr &= ~MSR_POW; diff --git a/arch/powerpc/kvm/book3s_pr_papr.c b/arch/powerpc/kvm/book3s_pr_papr.c index 031c8015864a..9384625c8051 100644 --- a/arch/powerpc/kvm/book3s_pr_papr.c +++ b/arch/powerpc/kvm/book3s_pr_papr.c @@ -378,7 +378,7 @@ int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd) kvmppc_set_msr_fast(vcpu, kvmppc_get_msr(vcpu) | MSR_EE); kvm_vcpu_block(vcpu); kvm_clear_request(KVM_REQ_UNHALT, vcpu); - vcpu->stat.halt_wakeup++; + vcpu->stat.common.halt_wakeup++; return EMULATE_DONE; case H_LOGICAL_CI_LOAD: return kvmppc_h_pr_logical_ci_load(vcpu); diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 7d5fe43f85c4..07fdd7a1254a 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -49,15 +49,15 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("inst_emu", emulated_inst_exits), VCPU_STAT("dec", dec_exits), VCPU_STAT("ext_intr", ext_intr_exits), - VCPU_STAT("halt_successful_poll", halt_successful_poll), - VCPU_STAT("halt_attempted_poll", halt_attempted_poll), - VCPU_STAT("halt_poll_invalid", halt_poll_invalid), - VCPU_STAT("halt_wakeup", halt_wakeup), + VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), + VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), + VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid), + VCPU_STAT_COM("halt_wakeup", halt_wakeup), VCPU_STAT("doorbell", dbell_exits), VCPU_STAT("guest doorbell", gdbell_exits), - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), - VM_STAT("remote_tlb_flush", remote_tlb_flush), + VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns), + VCPU_STAT_COM("halt_poll_fail_ns", halt_poll_fail_ns), + VM_STAT_COM("remote_tlb_flush", remote_tlb_flush), { NULL } }; diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 8925f3969478..57a20897f3db 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -361,6 +361,7 @@ struct sie_page { }; struct kvm_vcpu_stat { + struct kvm_vcpu_stat_common common; u64 exit_userspace; u64 exit_null; u64 exit_external_request; @@ -370,13 +371,7 @@ struct kvm_vcpu_stat { u64 exit_validity; u64 exit_instruction; u64 exit_pei; - u64 halt_successful_poll; - u64 halt_attempted_poll; - u64 halt_poll_invalid; u64 halt_no_poll_steal; - u64 halt_wakeup; - u64 halt_poll_success_ns; - u64 halt_poll_fail_ns; u64 instruction_lctl; u64 instruction_lctlg; u64 instruction_stctl; @@ -755,12 +750,12 @@ struct kvm_vcpu_arch { }; struct kvm_vm_stat { + struct kvm_vm_stat_common common; u64 inject_io; u64 inject_float_mchk; u64 inject_pfault_done; u64 inject_service_signal; u64 inject_virtio; - u64 remote_tlb_flush; }; struct kvm_arch_memory_slot { diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 1296fc10f80c..d6bf3372bb10 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -72,13 +72,13 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("exit_program_interruption", exit_program_interruption), VCPU_STAT("exit_instr_and_program_int", exit_instr_and_program), VCPU_STAT("exit_operation_exception", exit_operation_exception), - VCPU_STAT("halt_successful_poll", halt_successful_poll), - VCPU_STAT("halt_attempted_poll", halt_attempted_poll), - VCPU_STAT("halt_poll_invalid", halt_poll_invalid), + VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), + VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), + VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid), VCPU_STAT("halt_no_poll_steal", halt_no_poll_steal), - VCPU_STAT("halt_wakeup", halt_wakeup), - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), + VCPU_STAT_COM("halt_wakeup", halt_wakeup), + VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns), + VCPU_STAT_COM("halt_poll_fail_ns", halt_poll_fail_ns), VCPU_STAT("instruction_lctlg", instruction_lctlg), VCPU_STAT("instruction_lctl", instruction_lctl), VCPU_STAT("instruction_stctl", instruction_stctl), diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 55efbacfc244..5bfd6893fbf6 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1127,6 +1127,7 @@ struct kvm_arch { }; struct kvm_vm_stat { + struct kvm_vm_stat_common common; ulong mmu_shadow_zapped; ulong mmu_pte_write; ulong mmu_pde_zapped; @@ -1134,13 +1135,13 @@ struct kvm_vm_stat { ulong mmu_recycled; ulong mmu_cache_miss; ulong mmu_unsync; - ulong remote_tlb_flush; ulong lpages; ulong nx_lpage_splits; ulong max_mmu_page_hash_collisions; }; struct kvm_vcpu_stat { + struct kvm_vcpu_stat_common common; u64 pf_fixed; u64 pf_guest; u64 tlb_flush; @@ -1154,10 +1155,6 @@ struct kvm_vcpu_stat { u64 nmi_window_exits; u64 l1d_flush; u64 halt_exits; - u64 halt_successful_poll; - u64 halt_attempted_poll; - u64 halt_poll_invalid; - u64 halt_wakeup; u64 request_irq_exits; u64 irq_exits; u64 host_state_reload; @@ -1168,8 +1165,6 @@ struct kvm_vcpu_stat { u64 irq_injections; u64 nmi_injections; u64 req_event; - u64 halt_poll_success_ns; - u64 halt_poll_fail_ns; u64 nested_run; u64 directed_yield_attempted; u64 directed_yield_successful; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 9b6bca616929..9a93d80caff6 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -226,10 +226,10 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("irq_window", irq_window_exits), VCPU_STAT("nmi_window", nmi_window_exits), VCPU_STAT("halt_exits", halt_exits), - VCPU_STAT("halt_successful_poll", halt_successful_poll), - VCPU_STAT("halt_attempted_poll", halt_attempted_poll), - VCPU_STAT("halt_poll_invalid", halt_poll_invalid), - VCPU_STAT("halt_wakeup", halt_wakeup), + VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), + VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), + VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid), + VCPU_STAT_COM("halt_wakeup", halt_wakeup), VCPU_STAT("hypercalls", hypercalls), VCPU_STAT("request_irq", request_irq_exits), VCPU_STAT("irq_exits", irq_exits), @@ -241,8 +241,8 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("nmi_injections", nmi_injections), VCPU_STAT("req_event", req_event), VCPU_STAT("l1d_flush", l1d_flush), - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), + VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns), + VCPU_STAT_COM("halt_poll_fail_ns", halt_poll_fail_ns), VCPU_STAT("nested_run", nested_run), VCPU_STAT("directed_yield_attempted", directed_yield_attempted), VCPU_STAT("directed_yield_successful", directed_yield_successful), @@ -253,7 +253,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VM_STAT("mmu_recycled", mmu_recycled), VM_STAT("mmu_cache_miss", mmu_cache_miss), VM_STAT("mmu_unsync", mmu_unsync), - VM_STAT("remote_tlb_flush", remote_tlb_flush), + VM_STAT_COM("remote_tlb_flush", remote_tlb_flush), VM_STAT("largepages", lpages, .mode = 0444), VM_STAT("nx_largepages_splitted", nx_lpage_splits, .mode = 0444), VM_STAT("max_mmu_page_hash_collisions", max_mmu_page_hash_collisions), diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 2f34487e21f2..97700e41db3b 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1243,10 +1243,15 @@ struct kvm_stats_debugfs_item { #define KVM_DBGFS_GET_MODE(dbgfs_item) \ ((dbgfs_item)->mode ? (dbgfs_item)->mode : 0644) -#define VM_STAT(n, x, ...) \ +#define VM_STAT(n, x, ...) \ { n, offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__ } -#define VCPU_STAT(n, x, ...) \ +#define VCPU_STAT(n, x, ...) \ { n, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__ } +#define VM_STAT_COM(n, x, ...) \ + { n, offsetof(struct kvm, stat.common.x), KVM_STAT_VM, ## __VA_ARGS__ } +#define VCPU_STAT_COM(n, x, ...) \ + { n, offsetof(struct kvm_vcpu, stat.common.x), \ + KVM_STAT_VCPU, ## __VA_ARGS__ } extern struct kvm_stats_debugfs_item debugfs_entries[]; extern struct dentry *kvm_debugfs_dir; diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index a7580f69dda0..87eb05ad678b 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -76,5 +76,17 @@ struct kvm_mmu_memory_cache { }; #endif +struct kvm_vm_stat_common { + ulong remote_tlb_flush; +}; + +struct kvm_vcpu_stat_common { + u64 halt_successful_poll; + u64 halt_attempted_poll; + u64 halt_poll_invalid; + u64 halt_wakeup; + u64 halt_poll_success_ns; + u64 halt_poll_fail_ns; +}; #endif /* __KVM_TYPES_H__ */ diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 6b4feb92dc79..34a4cf265297 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -330,7 +330,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm) */ if (!kvm_arch_flush_remote_tlb(kvm) || kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) - ++kvm->stat.remote_tlb_flush; + ++kvm->stat.common.remote_tlb_flush; cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); } EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs); @@ -2940,9 +2940,9 @@ static inline void update_halt_poll_stats(struct kvm_vcpu *vcpu, u64 poll_ns, bool waited) { if (waited) - vcpu->stat.halt_poll_fail_ns += poll_ns; + vcpu->stat.common.halt_poll_fail_ns += poll_ns; else - vcpu->stat.halt_poll_success_ns += poll_ns; + vcpu->stat.common.halt_poll_success_ns += poll_ns; } /* @@ -2960,16 +2960,16 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu) if (vcpu->halt_poll_ns && !kvm_arch_no_poll(vcpu)) { ktime_t stop = ktime_add_ns(ktime_get(), vcpu->halt_poll_ns); - ++vcpu->stat.halt_attempted_poll; + ++vcpu->stat.common.halt_attempted_poll; do { /* * This sets KVM_REQ_UNHALT if an interrupt * arrives. */ if (kvm_vcpu_check_block(vcpu) < 0) { - ++vcpu->stat.halt_successful_poll; + ++vcpu->stat.common.halt_successful_poll; if (!vcpu_valid_wakeup(vcpu)) - ++vcpu->stat.halt_poll_invalid; + ++vcpu->stat.common.halt_poll_invalid; goto out; } poll_end = cur = ktime_get(); @@ -3027,7 +3027,7 @@ bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu) waitp = kvm_arch_vcpu_get_wait(vcpu); if (rcuwait_wake_up(waitp)) { WRITE_ONCE(vcpu->ready, true); - ++vcpu->stat.halt_wakeup; + ++vcpu->stat.common.halt_wakeup; return true; } From patchwork Mon May 24 15:18:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 1482845 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; 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Mon, 24 May 2021 08:18:35 -0700 (PDT) Date: Mon, 24 May 2021 15:18:26 +0000 In-Reply-To: <20210524151828.4113777-1-jingzhangos@google.com> Message-Id: <20210524151828.4113777-3-jingzhangos@google.com> Mime-Version: 1.0 References: <20210524151828.4113777-1-jingzhangos@google.com> X-Mailer: git-send-email 2.31.1.818.g46aad6cb9e-goog Subject: [PATCH v6 2/4] KVM: stats: Add fd-based API to read binary stats data From: Jing Zhang To: KVM , KVMARM , LinuxMIPS , KVMPPC , LinuxS390 , Linuxkselftest , Paolo Bonzini , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Will Deacon , Huacai Chen , Aleksandar Markovic , Thomas Bogendoerfer , Paul Mackerras , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Jim Mattson , Peter Shier , Oliver Upton , David Rientjes , Emanuele Giuseppe Esposito , David Matlack , Ricardo Koller , Krish Sadhukhan Cc: Jing Zhang Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Provides a file descriptor per VM to read VM stats info/data. Provides a file descriptor per vCPU to read vCPU stats info/data. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Signed-off-by: Jing Zhang Reviewed-by: David Matlack --- arch/arm64/kvm/guest.c | 26 ++++++ arch/mips/kvm/mips.c | 52 ++++++++++++ arch/powerpc/kvm/book3s.c | 52 ++++++++++++ arch/powerpc/kvm/booke.c | 45 +++++++++++ arch/s390/kvm/kvm-s390.c | 117 +++++++++++++++++++++++++++ arch/x86/kvm/x86.c | 53 ++++++++++++ include/linux/kvm_host.h | 132 ++++++++++++++++++++++++++++++ include/uapi/linux/kvm.h | 50 ++++++++++++ virt/kvm/kvm_main.c | 165 ++++++++++++++++++++++++++++++++++++++ 9 files changed, 692 insertions(+) diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 0e41331b0911..1cc1d83630ac 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -28,6 +28,32 @@ #include "trace.h" +struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC(); + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = DEFINE_VCPU_STATS_DESC( + STATS_DESC_COUNTER("hvc_exit_stat"), + STATS_DESC_COUNTER("wfe_exit_stat"), + STATS_DESC_COUNTER("wfi_exit_stat"), + STATS_DESC_COUNTER("mmio_exit_user"), + STATS_DESC_COUNTER("mmio_exit_kernel"), + STATS_DESC_COUNTER("exits")); + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index f4fc60c05e9c..f17a65743ccd 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -38,6 +38,58 @@ #define VECTORSPACING 0x100 /* for EI/VI mode */ #endif +struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC(); + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = DEFINE_VCPU_STATS_DESC( + STATS_DESC_COUNTER("wait_exits"), + STATS_DESC_COUNTER("cache_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("int_exits"), + STATS_DESC_COUNTER("cop_unusable_exits"), + STATS_DESC_COUNTER("tlbmod_exits"), + STATS_DESC_COUNTER("tlbmiss_ld_exits"), + STATS_DESC_COUNTER("tlbmiss_st_exits"), + STATS_DESC_COUNTER("addrerr_st_exits"), + STATS_DESC_COUNTER("addrerr_ld_exits"), + STATS_DESC_COUNTER("syscall_exits"), + STATS_DESC_COUNTER("resvd_inst_exits"), + STATS_DESC_COUNTER("break_inst_exits"), + STATS_DESC_COUNTER("trap_inst_exits"), + STATS_DESC_COUNTER("msa_fpe_exits"), + STATS_DESC_COUNTER("fpe_exits"), + STATS_DESC_COUNTER("msa_disabled_exits"), + STATS_DESC_COUNTER("flush_dcache_exits"), +#ifdef CONFIG_KVM_MIPS_VZ + STATS_DESC_COUNTER("vz_gpsi_exits"), + STATS_DESC_COUNTER("vz_gsfc_exits"), + STATS_DESC_COUNTER("vz_hc_exits"), + STATS_DESC_COUNTER("vz_grr_exits"), + STATS_DESC_COUNTER("vz_gva_exits"), + STATS_DESC_COUNTER("vz_ghfc_exits"), + STATS_DESC_COUNTER("vz_gpa_exits"), + STATS_DESC_COUNTER("vz_resvd_exits"), +#ifdef CONFIG_CPU_LOONGSON64 + STATS_DESC_COUNTER("vz_cpucfg_exits"), +#endif +#endif + ); + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("wait", wait_exits), VCPU_STAT("cache", cache_exits), diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index bd3a10e1fdaf..5e8ee0d39ef9 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -38,6 +38,58 @@ /* #define EXIT_DEBUG */ +struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC( + STATS_DESC_ICOUNTER("num_2M_pages"), + STATS_DESC_ICOUNTER("num_1G_pages")); + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = DEFINE_VCPU_STATS_DESC( + STATS_DESC_COUNTER("sum_exits"), + STATS_DESC_COUNTER("mmio_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("light_exits"), + STATS_DESC_COUNTER("itlb_real_miss_exits"), + STATS_DESC_COUNTER("itlb_virt_miss_exits"), + STATS_DESC_COUNTER("dtlb_real_miss_exits"), + STATS_DESC_COUNTER("dtlb_virt_miss_exits"), + STATS_DESC_COUNTER("syscall_exits"), + STATS_DESC_COUNTER("isi_exits"), + STATS_DESC_COUNTER("dsi_exits"), + STATS_DESC_COUNTER("emulated_inst_exits"), + STATS_DESC_COUNTER("dec_exits"), + STATS_DESC_COUNTER("ext_intr_exits"), + STATS_DESC_TIME_NSEC("halt_wait_ns"), + STATS_DESC_COUNTER("halt_successful_wait"), + STATS_DESC_COUNTER("dbell_exits"), + STATS_DESC_COUNTER("gdbell_exits"), + STATS_DESC_COUNTER("ld"), + STATS_DESC_COUNTER("st"), + STATS_DESC_COUNTER("pf_storage"), + STATS_DESC_COUNTER("pf_instruc"), + STATS_DESC_COUNTER("sp_storage"), + STATS_DESC_COUNTER("sp_instruc"), + STATS_DESC_COUNTER("queue_intr"), + STATS_DESC_COUNTER("ld_slow"), + STATS_DESC_COUNTER("st_slow"), + STATS_DESC_COUNTER("pthru_all"), + STATS_DESC_COUNTER("pthru_host"), + STATS_DESC_COUNTER("pthru_bad_aff")); + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("exits", sum_exits), VCPU_STAT("mmio", mmio_exits), diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 07fdd7a1254a..86d221e9193e 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -36,6 +36,51 @@ unsigned long kvmppc_booke_handlers; +struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC( + STATS_DESC_ICOUNTER("num_2M_pages"), + STATS_DESC_ICOUNTER("num_1G_pages")); + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = DEFINE_VCPU_STATS_DESC( + STATS_DESC_COUNTER("sum_exits"), + STATS_DESC_COUNTER("mmio_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("light_exits"), + STATS_DESC_COUNTER("itlb_real_miss_exits"), + STATS_DESC_COUNTER("itlb_virt_miss_exits"), + STATS_DESC_COUNTER("dtlb_real_miss_exits"), + STATS_DESC_COUNTER("dtlb_virt_miss_exits"), + STATS_DESC_COUNTER("syscall_exits"), + STATS_DESC_COUNTER("isi_exits"), + STATS_DESC_COUNTER("dsi_exits"), + STATS_DESC_COUNTER("emulated_inst_exits"), + STATS_DESC_COUNTER("dec_exits"), + STATS_DESC_COUNTER("ext_intr_exits"), + STATS_DESC_TIME_NSEC("halt_wait_ns"), + STATS_DESC_COUNTER("halt_successful_wait"), + STATS_DESC_COUNTER("dbell_exits"), + STATS_DESC_COUNTER("gdbell_exits"), + STATS_DESC_COUNTER("ld"), + STATS_DESC_COUNTER("st"), + STATS_DESC_COUNTER("pthru_all"), + STATS_DESC_COUNTER("pthru_host"), + STATS_DESC_COUNTER("pthru_bad_aff")); + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("mmio", mmio_exits), VCPU_STAT("sig", signal_exits), diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index d6bf3372bb10..003feee79fce 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -58,6 +58,123 @@ #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ (KVM_MAX_VCPUS + LOCAL_IRQS)) +struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC( + STATS_DESC_COUNTER("inject_io"), + STATS_DESC_COUNTER("inject_float_mchk"), + STATS_DESC_COUNTER("inject_pfault_done"), + STATS_DESC_COUNTER("inject_service_signal"), + STATS_DESC_COUNTER("inject_virtio")); + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = DEFINE_VCPU_STATS_DESC( + STATS_DESC_COUNTER("exit_userspace"), + STATS_DESC_COUNTER("exit_null"), + STATS_DESC_COUNTER("exit_external_request"), + STATS_DESC_COUNTER("exit_io_request"), + STATS_DESC_COUNTER("exit_external_interrupt"), + STATS_DESC_COUNTER("exit_stop_request"), + STATS_DESC_COUNTER("exit_validity"), + STATS_DESC_COUNTER("exit_instruction"), + STATS_DESC_COUNTER("exit_pei"), + STATS_DESC_COUNTER("halt_no_poll_steal"), + STATS_DESC_COUNTER("instruction_lctl"), + STATS_DESC_COUNTER("instruction_lctlg"), + STATS_DESC_COUNTER("instruction_stctl"), + STATS_DESC_COUNTER("instruction_stctg"), + STATS_DESC_COUNTER("exit_program_interruption"), + STATS_DESC_COUNTER("exit_instr_and_program"), + STATS_DESC_COUNTER("exit_operation_exception"), + STATS_DESC_COUNTER("deliver_ckc"), + STATS_DESC_COUNTER("deliver_cputm"), + STATS_DESC_COUNTER("deliver_external_call"), + STATS_DESC_COUNTER("deliver_emergency_signal"), + STATS_DESC_COUNTER("deliver_service_signal"), + STATS_DESC_COUNTER("deliver_virtio"), + STATS_DESC_COUNTER("deliver_stop_signal"), + STATS_DESC_COUNTER("deliver_prefix_signal"), + STATS_DESC_COUNTER("deliver_restart_signal"), + STATS_DESC_COUNTER("deliver_program"), + STATS_DESC_COUNTER("deliver_io"), + STATS_DESC_COUNTER("deliver_machine_check"), + STATS_DESC_COUNTER("exit_wait_state"), + STATS_DESC_COUNTER("inject_ckc"), + STATS_DESC_COUNTER("inject_cputm"), + STATS_DESC_COUNTER("inject_external_call"), + STATS_DESC_COUNTER("inject_emergency_signal"), + STATS_DESC_COUNTER("inject_mchk"), + STATS_DESC_COUNTER("inject_pfault_init"), + STATS_DESC_COUNTER("inject_program"), + STATS_DESC_COUNTER("inject_restart"), + STATS_DESC_COUNTER("inject_set_prefix"), + STATS_DESC_COUNTER("inject_stop_signal"), + STATS_DESC_COUNTER("instruction_epsw"), + STATS_DESC_COUNTER("instruction_gs"), + STATS_DESC_COUNTER("instruction_io_other"), + STATS_DESC_COUNTER("instruction_lpsw"), + STATS_DESC_COUNTER("instruction_lpswe"), + STATS_DESC_COUNTER("instruction_pfmf"), + STATS_DESC_COUNTER("instruction_ptff"), + STATS_DESC_COUNTER("instruction_sck"), + STATS_DESC_COUNTER("instruction_sckpf"), + STATS_DESC_COUNTER("instruction_stidp"), + STATS_DESC_COUNTER("instruction_spx"), + STATS_DESC_COUNTER("instruction_stpx"), + STATS_DESC_COUNTER("instruction_stap"), + STATS_DESC_COUNTER("instruction_iske"), + STATS_DESC_COUNTER("instruction_ri"), + STATS_DESC_COUNTER("instruction_rrbe"), + STATS_DESC_COUNTER("instruction_sske"), + STATS_DESC_COUNTER("instruction_ipte_interlock"), + STATS_DESC_COUNTER("instruction_stsi"), + STATS_DESC_COUNTER("instruction_stfl"), + STATS_DESC_COUNTER("instruction_tb"), + STATS_DESC_COUNTER("instruction_tpi"), + STATS_DESC_COUNTER("instruction_tprot"), + STATS_DESC_COUNTER("instruction_tsch"), + STATS_DESC_COUNTER("instruction_sie"), + STATS_DESC_COUNTER("instruction_essa"), + STATS_DESC_COUNTER("instruction_sthyi"), + STATS_DESC_COUNTER("instruction_sigp_sense"), + STATS_DESC_COUNTER("instruction_sigp_sense_running"), + STATS_DESC_COUNTER("instruction_sigp_external_call"), + STATS_DESC_COUNTER("instruction_sigp_emergency"), + STATS_DESC_COUNTER("instruction_sigp_cond_emergency"), + STATS_DESC_COUNTER("instruction_sigp_start"), + STATS_DESC_COUNTER("instruction_sigp_stop"), + STATS_DESC_COUNTER("instruction_sigp_stop_store_status"), + STATS_DESC_COUNTER("instruction_sigp_store_status"), + STATS_DESC_COUNTER("instruction_sigp_store_adtl_status"), + STATS_DESC_COUNTER("instruction_sigp_arch"), + STATS_DESC_COUNTER("instruction_sigp_prefix"), + STATS_DESC_COUNTER("instruction_sigp_restart"), + STATS_DESC_COUNTER("instruction_sigp_init_cpu_reset"), + STATS_DESC_COUNTER("instruction_sigp_cpu_reset"), + STATS_DESC_COUNTER("instruction_sigp_unknown"), + STATS_DESC_COUNTER("diagnose_10"), + STATS_DESC_COUNTER("diagnose_44"), + STATS_DESC_COUNTER("diagnose_9c"), + STATS_DESC_COUNTER("diagnose_9c_ignored"), + STATS_DESC_COUNTER("diagnose_258"), + STATS_DESC_COUNTER("diagnose_308"), + STATS_DESC_COUNTER("diagnose_500"), + STATS_DESC_COUNTER("diagnose_other"), + STATS_DESC_COUNTER("pfault_sync")); + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("userspace_handled", exit_userspace), VCPU_STAT("exit_null", exit_null), diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 9a93d80caff6..84880687c199 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -214,6 +214,59 @@ EXPORT_SYMBOL_GPL(host_xss); u64 __read_mostly supported_xss; EXPORT_SYMBOL_GPL(supported_xss); +struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC( + STATS_DESC_COUNTER("mmu_shadow_zapped"), + STATS_DESC_COUNTER("mmu_pte_write"), + STATS_DESC_COUNTER("mmu_pde_zapped"), + STATS_DESC_COUNTER("mmu_flooded"), + STATS_DESC_COUNTER("mmu_recycled"), + STATS_DESC_COUNTER("mmu_cache_miss"), + STATS_DESC_ICOUNTER("mmu_unsync"), + STATS_DESC_ICOUNTER("largepages"), + STATS_DESC_ICOUNTER("nx_largepages_splits"), + STATS_DESC_ICOUNTER("max_mmu_page_hash_collisions")); + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = DEFINE_VCPU_STATS_DESC( + STATS_DESC_COUNTER("pf_fixed"), + STATS_DESC_COUNTER("pf_guest"), + STATS_DESC_COUNTER("tlb_flush"), + STATS_DESC_COUNTER("invlpg"), + STATS_DESC_COUNTER("exits"), + STATS_DESC_COUNTER("io_exits"), + STATS_DESC_COUNTER("mmio_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("irq_window_exits"), + STATS_DESC_COUNTER("nmi_window_exits"), + STATS_DESC_COUNTER("l1d_flush"), + STATS_DESC_COUNTER("halt_exits"), + STATS_DESC_COUNTER("request_irq_exits"), + STATS_DESC_COUNTER("irq_exits"), + STATS_DESC_COUNTER("host_state_reload"), + STATS_DESC_COUNTER("fpu_reload"), + STATS_DESC_COUNTER("insn_emulation"), + STATS_DESC_COUNTER("insn_emulation_fail"), + STATS_DESC_COUNTER("hypercalls"), + STATS_DESC_COUNTER("irq_injections"), + STATS_DESC_COUNTER("nmi_injections"), + STATS_DESC_COUNTER("req_event"), + STATS_DESC_COUNTER("nested_run")); + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("pf_fixed", pf_fixed), VCPU_STAT("pf_guest", pf_guest), diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 97700e41db3b..c0a8e6ddc745 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1240,6 +1240,19 @@ struct kvm_stats_debugfs_item { int mode; }; +struct _kvm_stats_header { + __u32 name_size; + __u32 count; + __u32 desc_offset; + __u32 data_offset; +}; + +#define KVM_STATS_NAME_LEN 48 +struct _kvm_stats_desc { + struct kvm_stats_desc desc; + char name[KVM_STATS_NAME_LEN]; +}; + #define KVM_DBGFS_GET_MODE(dbgfs_item) \ ((dbgfs_item)->mode ? (dbgfs_item)->mode : 0644) @@ -1253,8 +1266,127 @@ struct kvm_stats_debugfs_item { { n, offsetof(struct kvm_vcpu, stat.common.x), \ KVM_STAT_VCPU, ## __VA_ARGS__ } +#define STATS_DESC(stat, type, unit, scale, exp) \ + { \ + { \ + .flags = type | unit | scale, \ + .exponent = exp, \ + .size = 1 \ + }, \ + .name = stat, \ + } +#define STATS_DESC_CUMULATIVE(name, unit, scale, exponent) \ + STATS_DESC(name, KVM_STATS_TYPE_CUMULATIVE, unit, scale, exponent) +#define STATS_DESC_INSTANT(name, unit, scale, exponent) \ + STATS_DESC(name, KVM_STATS_TYPE_INSTANT, unit, scale, exponent) + +/* Cumulative counter */ +#define STATS_DESC_COUNTER(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_NONE, \ + KVM_STATS_BASE_POW10, 0) +/* Instantaneous counter */ +#define STATS_DESC_ICOUNTER(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_NONE, \ + KVM_STATS_BASE_POW10, 0) + +/* Cumulative clock cycles */ +#define STATS_DESC_CYCLE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_CYCLES, \ + KVM_STATS_BASE_POW10, 0) +/* Instantaneous clock cycles */ +#define STATS_DESC_ICYCLE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_CYCLES, \ + KVM_STATS_BASE_POW10, 0) + +/* Cumulative memory size in Byte */ +#define STATS_DESC_SIZE_BYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 0) +/* Cumulative memory size in KiByte */ +#define STATS_DESC_SIZE_KBYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 10) +/* Cumulative memory size in MiByte */ +#define STATS_DESC_SIZE_MBYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 20) +/* Cumulative memory size in GiByte */ +#define STATS_DESC_SIZE_GBYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 30) + +/* Instantaneous memory size in Byte */ +#define STATS_DESC_ISIZE_BYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 0) +/* Instantaneous memory size in KiByte */ +#define STATS_DESC_ISIZE_KBYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 10) +/* Instantaneous memory size in MiByte */ +#define STATS_DESC_ISIZE_MBYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 20) +/* Instantaneous memory size in GiByte */ +#define STATS_DESC_ISIZE_GBYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_BASE_POW2, 30) + +/* Cumulative time in second */ +#define STATS_DESC_TIME_SEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, 0) +/* Cumulative time in millisecond */ +#define STATS_DESC_TIME_MSEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, -3) +/* Cumulative time in microsecond */ +#define STATS_DESC_TIME_USEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, -6) +/* Cumulative time in nanosecond */ +#define STATS_DESC_TIME_NSEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, -9) + +/* Instantaneous time in second */ +#define STATS_DESC_ITIME_SEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, 0) +/* Instantaneous time in millisecond */ +#define STATS_DESC_ITIME_MSEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, -3) +/* Instantaneous time in microsecond */ +#define STATS_DESC_ITIME_USEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, -6) +/* Instantaneous time in nanosecond */ +#define STATS_DESC_ITIME_NSEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_BASE_POW10, -9) + +#define DEFINE_VM_STATS_DESC(...) { \ + STATS_DESC_COUNTER("remote_tlb_flush"), \ + ## __VA_ARGS__ \ +} + +#define DEFINE_VCPU_STATS_DESC(...) { \ + STATS_DESC_COUNTER("halt_successful_poll"), \ + STATS_DESC_COUNTER("halt_attempted_poll"), \ + STATS_DESC_COUNTER("halt_poll_invalid"), \ + STATS_DESC_COUNTER("halt_wakeup"), \ + STATS_DESC_TIME_NSEC("halt_poll_success_ns"), \ + STATS_DESC_TIME_NSEC("halt_poll_fail_ns"), \ + ## __VA_ARGS__ \ +} + extern struct kvm_stats_debugfs_item debugfs_entries[]; extern struct dentry *kvm_debugfs_dir; +extern struct _kvm_stats_header kvm_vm_stats_header; +extern struct _kvm_stats_header kvm_vcpu_stats_header; +extern struct _kvm_stats_desc kvm_vm_stats_desc[]; +extern struct _kvm_stats_desc kvm_vcpu_stats_desc[]; #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 3fd9a7e9d90c..82db825c392c 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1082,6 +1082,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_SGX_ATTRIBUTE 196 #define KVM_CAP_VM_COPY_ENC_CONTEXT_FROM 197 #define KVM_CAP_PTP_KVM 198 +#define KVM_CAP_STATS_BINARY_FD 199 #ifdef KVM_CAP_IRQ_ROUTING @@ -1898,4 +1899,53 @@ struct kvm_dirty_gfn { #define KVM_BUS_LOCK_DETECTION_OFF (1 << 0) #define KVM_BUS_LOCK_DETECTION_EXIT (1 << 1) +#define KVM_STATS_ID_MAXLEN 64 + +struct kvm_stats_header { + char id[KVM_STATS_ID_MAXLEN]; + __u32 name_size; + __u32 count; + __u32 desc_offset; + __u32 data_offset; +}; + +#define KVM_STATS_TYPE_SHIFT 0 +#define KVM_STATS_TYPE_MASK (0xF << KVM_STATS_TYPE_SHIFT) +#define KVM_STATS_TYPE_CUMULATIVE (0x0 << KVM_STATS_TYPE_SHIFT) +#define KVM_STATS_TYPE_INSTANT (0x1 << KVM_STATS_TYPE_SHIFT) +#define KVM_STATS_TYPE_MAX KVM_STATS_TYPE_INSTANT + +#define KVM_STATS_UNIT_SHIFT 4 +#define KVM_STATS_UNIT_MASK (0xF << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_NONE (0x0 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_BYTES (0x1 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_SECONDS (0x2 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_CYCLES (0x3 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_MAX KVM_STATS_UNIT_CYCLES + +#define KVM_STATS_BASE_SHIFT 8 +#define KVM_STATS_BASE_MASK (0xF << KVM_STATS_BASE_SHIFT) +#define KVM_STATS_BASE_POW10 (0x0 << KVM_STATS_BASE_SHIFT) +#define KVM_STATS_BASE_POW2 (0x1 << KVM_STATS_BASE_SHIFT) +#define KVM_STATS_BASE_MAX KVM_STATS_BASE_POW2 + +struct kvm_stats_desc { + __u32 flags; + __s16 exponent; + __u16 size; + __u32 unused1; + __u32 unused2; + char name[0]; +}; + +struct kvm_vm_stats_data { + unsigned long value[0]; +}; + +struct kvm_vcpu_stats_data { + __u64 value[0]; +}; + +#define KVM_STATS_GETFD _IOR(KVMIO, 0xcc, struct kvm_stats_header) + #endif /* __LINUX_KVM_H */ diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 34a4cf265297..9e20e2ff78b4 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3409,6 +3409,120 @@ static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) return 0; } +static ssize_t kvm_stats_read(char *id, struct _kvm_stats_header *header, + struct _kvm_stats_desc *desc, void *stats, size_t size_stats, + char __user *user_buffer, size_t size, loff_t *offset) +{ + ssize_t copylen, len, remain = size; + size_t size_header, size_desc; + loff_t pos = *offset; + char __user *dest = user_buffer; + void *src; + + size_header = sizeof(*header); + size_desc = header->count * sizeof(*desc); + + len = KVM_STATS_ID_MAXLEN + size_header + size_desc + size_stats - pos; + len = min(len, remain); + if (len <= 0) + return 0; + remain = len; + + /* Copy kvm stats header id string */ + copylen = KVM_STATS_ID_MAXLEN - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = id + pos; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm stats header */ + copylen = KVM_STATS_ID_MAXLEN + size_header - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = header + pos - KVM_STATS_ID_MAXLEN; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm stats descriptors */ + copylen = header->desc_offset + size_desc - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = desc + pos - header->desc_offset; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm stats values */ + copylen = header->data_offset + size_stats - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = stats + pos - header->data_offset; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + + *offset = pos; + return len; +} + +static ssize_t kvm_vcpu_stats_read(struct file *file, char __user *user_buffer, + size_t size, loff_t *offset) +{ + char id[KVM_STATS_ID_MAXLEN]; + struct kvm_vcpu *vcpu = file->private_data; + + snprintf(id, sizeof(id), "kvm-%d/vcpu-%d", + task_pid_nr(current), vcpu->vcpu_id); + return kvm_stats_read(id, &kvm_vcpu_stats_header, + &kvm_vcpu_stats_desc[0], &vcpu->stat, + sizeof(vcpu->stat), user_buffer, size, offset); +} + +static const struct file_operations kvm_vcpu_stats_fops = { + .read = kvm_vcpu_stats_read, + .llseek = noop_llseek, +}; + +static int kvm_vcpu_ioctl_get_statsfd(struct kvm_vcpu *vcpu) +{ + int error, fd; + struct file *file; + char name[15 + ITOA_MAX_LEN + 1]; + + snprintf(name, sizeof(name), "kvm-vcpu-stats:%d", vcpu->vcpu_id); + + error = get_unused_fd_flags(O_CLOEXEC); + if (error < 0) + return error; + fd = error; + + file = anon_inode_getfile(name, &kvm_vcpu_stats_fops, vcpu, O_RDONLY); + if (IS_ERR(file)) { + error = PTR_ERR(file); + goto err_put_unused_fd; + } + file->f_mode |= FMODE_PREAD; + fd_install(fd, file); + + return fd; + +err_put_unused_fd: + put_unused_fd(fd); + return error; +} + static long kvm_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -3606,6 +3720,10 @@ static long kvm_vcpu_ioctl(struct file *filp, r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); break; } + case KVM_STATS_GETFD: { + r = kvm_vcpu_ioctl_get_statsfd(vcpu); + break; + } default: r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); } @@ -3864,6 +3982,8 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) #else return 0; #endif + case KVM_CAP_STATS_BINARY_FD: + return 1; default: break; } @@ -3967,6 +4087,48 @@ static int kvm_vm_ioctl_enable_cap_generic(struct kvm *kvm, } } +static ssize_t kvm_vm_stats_read(struct file *file, char __user *user_buffer, + size_t size, loff_t *offset) +{ + char id[KVM_STATS_ID_MAXLEN]; + struct kvm *kvm = file->private_data; + + snprintf(id, sizeof(id), "kvm-%d", task_pid_nr(current)); + return kvm_stats_read(id, &kvm_vm_stats_header, &kvm_vm_stats_desc[0], + &kvm->stat, sizeof(kvm->stat), user_buffer, size, offset); +} + +static const struct file_operations kvm_vm_stats_fops = { + .read = kvm_vm_stats_read, + .llseek = noop_llseek, +}; + +static int kvm_vm_ioctl_get_statsfd(struct kvm *kvm) +{ + int error, fd; + struct file *file; + + error = get_unused_fd_flags(O_CLOEXEC); + if (error < 0) + return error; + fd = error; + + file = anon_inode_getfile("kvm-vm-stats", + &kvm_vm_stats_fops, kvm, O_RDONLY); + if (IS_ERR(file)) { + error = PTR_ERR(file); + goto err_put_unused_fd; + } + file->f_mode |= FMODE_PREAD; + fd_install(fd, file); + + return fd; + +err_put_unused_fd: + put_unused_fd(fd); + return error; +} + static long kvm_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -4149,6 +4311,9 @@ static long kvm_vm_ioctl(struct file *filp, case KVM_RESET_DIRTY_RINGS: r = kvm_vm_ioctl_reset_dirty_pages(kvm); break; + case KVM_STATS_GETFD: + r = kvm_vm_ioctl_get_statsfd(kvm); + break; default: r = kvm_arch_vm_ioctl(filp, ioctl, arg); } From patchwork Mon May 24 15:18:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 1482844 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=Hu/y/7nw; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Fphr25Sz6z9tD3 for ; Tue, 25 May 2021 02:05:06 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236162AbhEXQGa (ORCPT ); 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Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Signed-off-by: Jing Zhang Reviewed-by: David Matlack --- Documentation/virt/kvm/api.rst | 179 +++++++++++++++++++++++++++++++++ 1 file changed, 179 insertions(+) diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index 7fcb2fd38f42..5cedddd579b2 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -5034,6 +5034,177 @@ see KVM_XEN_VCPU_SET_ATTR above. The KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST type may not be used with the KVM_XEN_VCPU_GET_ATTR ioctl. +4.130 KVM_STATS_GETFD +--------------------- + +:Capability: KVM_CAP_STATS_BINARY_FD +:Architectures: all +:Type: vm ioctl, vcpu ioctl +:Parameters: none +:Returns: statistics file descriptor on success, < 0 on error + +Errors: + + ====== ====================================================== + ENOMEM if the fd could not be created due to lack of memory + EMFILE if the number of opened files exceeds the limit + ====== ====================================================== + +The file descriptor can be used to read VM/vCPU statistics data in binary +format. The file data is organized into three blocks as below: ++-------------+ +| Header | ++-------------+ +| Descriptors | ++-------------+ +| Stats Data | ++-------------+ + +The Header block is always at the start of the file. It is only needed to be +read one time after a VM boot. +It is in the form of ``struct kvm_stats_header`` as below:: + + #define KVM_STATS_ID_MAXLEN 64 + + struct kvm_stats_header { + char id[KVM_STATS_ID_MAXLEN]; + __u32 name_size; + __u32 count; + __u32 desc_offset; + __u32 data_offset; + }; + +The ``id`` field is identification for the corresponding KVM statistics. For +VM statistics, it is in the form of "kvm-{kvm pid}", like "kvm-12345". For +VCPU statistics, it is in the form of "kvm-{kvm pid}/vcpu-{vcpu id}", like +"kvm-12345/vcpu-12". + +The ``name_size`` field is the size (byte) of the statistics name string +(including trailing '\0') appended to the end of every statistics descriptor. + +The ``count`` field is the number of statistics. + +The ``desc_offset`` field is the offset of the Descriptors block from the start +of the file indicated by the file descriptor. + +The ``data_offset`` field is the offset of the Stats Data block from the start +of the file indicated by the file descriptor. + +The Descriptors block is only needed to be read once after a VM boot. It is +an array of ``struct kvm_stats_desc`` as shown in below code block:: + + #define KVM_STATS_TYPE_SHIFT 0 + #define KVM_STATS_TYPE_MASK (0xF << KVM_STATS_TYPE_SHIFT) + #define KVM_STATS_TYPE_CUMULATIVE (0x0 << KVM_STATS_TYPE_SHIFT) + #define KVM_STATS_TYPE_INSTANT (0x1 << KVM_STATS_TYPE_SHIFT) + #define KVM_STATS_TYPE_MAX KVM_STATS_TYPE_INSTANT + + #define KVM_STATS_UNIT_SHIFT 4 + #define KVM_STATS_UNIT_MASK (0xF << KVM_STATS_UNIT_SHIFT) + #define KVM_STATS_UNIT_NONE (0x0 << KVM_STATS_UNIT_SHIFT) + #define KVM_STATS_UNIT_BYTES (0x1 << KVM_STATS_UNIT_SHIFT) + #define KVM_STATS_UNIT_SECONDS (0x2 << KVM_STATS_UNIT_SHIFT) + #define KVM_STATS_UNIT_CYCLES (0x3 << KVM_STATS_UNIT_SHIFT) + #define KVM_STATS_UNIT_MAX KVM_STATS_UNIT_CYCLES + + #define KVM_STATS_BASE_SHIFT 8 + #define KVM_STATS_BASE_MASK (0xF << KVM_STATS_BASE_SHIFT) + #define KVM_STATS_BASE_POW10 (0x0 << KVM_STATS_BASE_SHIFT) + #define KVM_STATS_BASE_POW2 (0x1 << KVM_STATS_BASE_SHIFT) + #define KVM_STATS_BASE_MAX KVM_STATS_BASE_POW2 + + struct kvm_stats_desc { + __u32 flags; + __s16 exponent; + __u16 size; + __u32 unused1; + __u32 unused2; + char name[0]; + }; + +The ``flags`` field contains the type and unit of the statistics data described +by this descriptor. The following flags are supported: + +Bits 0-3 of ``flags`` encode the type: + * ``KVM_STATS_TYPE_CUMULATIVE`` + The statistics data is cumulative. The value of data can only be increased. + Most of the counters used in KVM are of this type. + The corresponding ``count`` filed for this type is always 1. + * ``KVM_STATS_TYPE_INSTANT`` + The statistics data is instantaneous. Its value can be increased or + decreased. This type is usually used as a measurement of some resources, + like the number of dirty pages, the number of large pages, etc. + The corresponding ``count`` field for this type is always 1. + +Bits 4-7 of ``flags`` encode the unit: + * ``KVM_STATS_UNIT_NONE`` + There is no unit for the value of statistics data. This usually means that + the value is a simple counter of an event. + * ``KVM_STATS_UNIT_BYTES`` + It indicates that the statistics data is used to measure memory size, in the + unit of Byte, KiByte, MiByte, GiByte, etc. The unit of the data is + determined by the ``exponent`` field in the descriptor. The + ``KVM_STATS_BASE_POW2`` flag is valid in this case. The unit of the data is + determined by ``pow(2, exponent)``. For example, if value is 10, + ``exponent`` is 20, which means the unit of statistics data is MiByte, we + can get the statistics data in the unit of Byte by + ``value * pow(2, exponent) = 10 * pow(2, 20) = 10 MiByte`` which is + 10 * 1024 * 1024 Bytes. + * ``KVM_STATS_UNIT_SECONDS`` + It indicates that the statistics data is used to measure time/latency, in + the unit of nanosecond, microsecond, millisecond and second. The unit of the + data is determined by the ``exponent`` field in the descriptor. The + ``KVM_STATS_BASE_POW10`` flag is valid in this case. The unit of the data + is determined by ``pow(10, exponent)``. For example, if value is 2000000, + ``exponent`` is -6, which means the unit of statistics data is microsecond, + we can get the statistics data in the unit of second by + ``value * pow(10, exponent) = 2000000 * pow(10, -6) = 2 seconds``. + * ``KVM_STATS_UNIT_CYCLES`` + It indicates that the statistics data is used to measure CPU clock cycles. + The ``KVM_STATS_BASE_POW10`` flag is valid in this case. For example, if + value is 200, ``exponent`` is 4, we can get the number of CPU clock cycles + by ``value * pow(10, exponent) = 200 * pow(10, 4) = 2000000``. + +Bits 7-11 of ``flags`` encode the base: + * ``KVM_STATS_BASE_POW10`` + The scale is based on power of 10. It is used for measurement of time and + CPU clock cycles. + * ``KVM_STATS_BASE_POW2`` + The scale is based on power of 2. It is used for measurement of memory size. + +The ``exponent`` field is the scale of corresponding statistics data. For +example, if the unit is ``KVM_STATS_UNIT_BYTES``, the base is +``KVM_STATS_BASE_POW2``, the ``exponent`` is 10, then we know that the real +unit of the statistics data is KBytes a.k.a pow(2, 10) = 1024 bytes. + +The ``size`` field is the number of values of this statistics data. It is in the +unit of ``unsigned long`` for VM or ``__u64`` for VCPU. + +The ``unused1`` and ``unused2`` fields are reserved for future +support for other types of statistics data, like log/linear histogram. + +The ``name`` field points to the name string of the statistics data. The name +string starts at the end of ``struct kvm_stats_desc``. +The maximum length (including trailing '\0') is indicated by ``name_size`` +in ``struct kvm_stats_header``. + +The Stats Data block contains an array of data values of type ``struct +kvm_vm_stats_data`` or ``struct kvm_vcpu_stats_data``. It would be read by +user space periodically to pull statistics data. +The order of data value in Stats Data block is the same as the order of +descriptors in Descriptors block. + * Statistics data for VM:: + + struct kvm_vm_stats_data { + unsigned long value[0]; + }; + + * Statistics data for VCPU:: + + struct kvm_vcpu_stats_data { + __u64 value[0]; + }; + 5. The kvm_run structure ======================== @@ -6891,3 +7062,11 @@ This capability is always enabled. This capability indicates that the KVM virtual PTP service is supported in the host. A VMM can check whether the service is available to the guest on migration. + +8.33 KVM_CAP_STATS_BINARY_FD +---------------------------- + +:Architectures: all + +This capability indicates the feature that user space can create get a file +descriptor for every VM and VCPU to read statistics data in binary format. From patchwork Mon May 24 15:18:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 1482846 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=ApeANbFr; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Fphr61ChYz9tkF for ; Tue, 25 May 2021 02:05:10 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236180AbhEXQGe (ORCPT ); Mon, 24 May 2021 12:06:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53874 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237231AbhEXQFO (ORCPT ); Mon, 24 May 2021 12:05:14 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 224C7C026BE2 for ; Mon, 24 May 2021 08:18:39 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id a21-20020a62e2150000b02902e4e5d37f10so6811335pfi.11 for ; Mon, 24 May 2021 08:18:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=UegFRYct3sLqT7pl1JEE19wyOxnWvgvclbZj0R5joEw=; b=ApeANbFrUsOLWs657ASas6zyPJp3sMEzvjJ6diCCbgEJfKHg7jPnVB+X8KJ2K9wObp Oym8WfmPp6FmRvXl4xxMWYVtbSqL9squwfQ6HIhTGK0jnMNLfMrM8u6nt5pw9xf8yqdJ G5828StXxoL9CUmGGe7bZAS1YApU/djbLwlT2Eyc0UGxAtiF8ImhtB6lllo2NLlSBE2V JhMajTpHchhM45gpFd/nKdBAcqThdLRRkXQYbL8RZYtJx53wS90JQ/i/lZEfusGswPXm eVcNdKONN4zvjnR2fHra8MctvrdqUw85ivuIzEXFFbaXF85c8rkRgfxeC760gQzTbXEd tPFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=UegFRYct3sLqT7pl1JEE19wyOxnWvgvclbZj0R5joEw=; b=bHNY/7byRMcDZsrONE3EukFoGNiGvx6TTtl22dxy+CjV/PfoJKYecVivHYcvXu6SCV cYdrxgKjIcdkQImKGothWWX4vDxBK4Ay3BVMww1Ol4TGgK53X3HUcvShXOk7J6k+fcrx gs4VgB4gITrcHMQC+2e+kYiUzaZ3fVRKvMQgJ1ThamxtSa6hqKXWgT5NZQoR18L4Q+eI ygdlgOSPCxC3cYpfQaaDUunT1yfM+xeystSMqxn2hkajsFS8wpq2NRPkG/ParOTgNVaT WbR9ozSQplhQGGltCdtkOt/LvY5O1yQjawc0viG2anSvWw5nR/sK7GPyRCerE9HYqzsv igWg== X-Gm-Message-State: AOAM530WnFsU6IYhdFQFBceweIwxBqBB6E4s8IGz/0Eu+8u5HW4A/aX7 v9tLsV+m48r48tD6Z24C8HXqR57M3KMxIZySPA== X-Google-Smtp-Source: ABdhPJyU4RXPh5DqjZvaKB+BvjwGCDsf7NbHS3MikVnZnMV5T1gQ7C3fkbsfHjLDDoBtFaAUFlYadVoAgve8b/ej+w== X-Received: from jgzg.c.googlers.com ([fda3:e722:ac3:10:7f:e700:c0a8:1acf]) (user=jingzhangos job=sendgmr) by 2002:a17:90a:ab0c:: with SMTP id m12mr25307556pjq.179.1621869518420; Mon, 24 May 2021 08:18:38 -0700 (PDT) Date: Mon, 24 May 2021 15:18:28 +0000 In-Reply-To: <20210524151828.4113777-1-jingzhangos@google.com> Message-Id: <20210524151828.4113777-5-jingzhangos@google.com> Mime-Version: 1.0 References: <20210524151828.4113777-1-jingzhangos@google.com> X-Mailer: git-send-email 2.31.1.818.g46aad6cb9e-goog Subject: [PATCH v6 4/4] KVM: selftests: Add selftest for KVM statistics data binary interface From: Jing Zhang To: KVM , KVMARM , LinuxMIPS , KVMPPC , LinuxS390 , Linuxkselftest , Paolo Bonzini , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Will Deacon , Huacai Chen , Aleksandar Markovic , Thomas Bogendoerfer , Paul Mackerras , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Sean Christopherson , Vitaly Kuznetsov , Jim Mattson , Peter Shier , Oliver Upton , David Rientjes , Emanuele Giuseppe Esposito , David Matlack , Ricardo Koller , Krish Sadhukhan Cc: Jing Zhang Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Add selftest to check KVM stats descriptors validity. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Signed-off-by: Jing Zhang Reviewed-by: David Matlack --- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 3 + .../testing/selftests/kvm/include/kvm_util.h | 3 + .../selftests/kvm/kvm_bin_form_stats.c | 216 ++++++++++++++++++ tools/testing/selftests/kvm/lib/kvm_util.c | 12 + 5 files changed, 235 insertions(+) create mode 100644 tools/testing/selftests/kvm/kvm_bin_form_stats.c diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index bd83158e0e0b..35796667c944 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -43,3 +43,4 @@ /memslot_modification_stress_test /set_memory_region_test /steal_time +/kvm_bin_form_stats diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index e439d027939d..2984c86c848a 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -76,6 +76,7 @@ TEST_GEN_PROGS_x86_64 += kvm_page_table_test TEST_GEN_PROGS_x86_64 += memslot_modification_stress_test TEST_GEN_PROGS_x86_64 += set_memory_region_test TEST_GEN_PROGS_x86_64 += steal_time +TEST_GEN_PROGS_x86_64 += kvm_bin_form_stats TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list-sve @@ -87,6 +88,7 @@ TEST_GEN_PROGS_aarch64 += kvm_create_max_vcpus TEST_GEN_PROGS_aarch64 += kvm_page_table_test TEST_GEN_PROGS_aarch64 += set_memory_region_test TEST_GEN_PROGS_aarch64 += steal_time +TEST_GEN_PROGS_aarch64 += kvm_bin_form_stats TEST_GEN_PROGS_s390x = s390x/memop TEST_GEN_PROGS_s390x += s390x/resets @@ -96,6 +98,7 @@ TEST_GEN_PROGS_s390x += dirty_log_test TEST_GEN_PROGS_s390x += kvm_create_max_vcpus TEST_GEN_PROGS_s390x += kvm_page_table_test TEST_GEN_PROGS_s390x += set_memory_region_test +TEST_GEN_PROGS_s390x += kvm_bin_form_stats TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M)) LIBKVM += $(LIBKVM_$(UNAME_M)) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index a8f022794ce3..ee01a67022d9 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -387,4 +387,7 @@ uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc); #define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \ __GUEST_ASSERT((_condition), 4, (arg1), (arg2), (arg3), (arg4)) +int vm_get_statsfd(struct kvm_vm *vm); +int vcpu_get_statsfd(struct kvm_vm *vm, uint32_t vcpuid); + #endif /* SELFTEST_KVM_UTIL_H */ diff --git a/tools/testing/selftests/kvm/kvm_bin_form_stats.c b/tools/testing/selftests/kvm/kvm_bin_form_stats.c new file mode 100644 index 000000000000..09e12c5838af --- /dev/null +++ b/tools/testing/selftests/kvm/kvm_bin_form_stats.c @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * kvm_bin_form_stats + * + * Copyright (C) 2021, Google LLC. + * + * Test the fd-based interface for KVM statistics. + */ + +#define _GNU_SOURCE /* for program_invocation_short_name */ +#include +#include +#include +#include +#include + +#include "test_util.h" + +#include "kvm_util.h" +#include "asm/kvm.h" +#include "linux/kvm.h" + +int stats_test(int stats_fd, int size_stat) +{ + ssize_t ret; + int i; + size_t size_desc, size_data = 0; + struct kvm_stats_header header; + struct kvm_stats_desc *stats_desc, *pdesc; + void *stats_data; + + /* Read kvm stats header */ + ret = read(stats_fd, &header, sizeof(header)); + TEST_ASSERT(ret == sizeof(header), "Read stats header"); + size_desc = sizeof(*stats_desc) + header.name_size; + + /* Check id string in header, that should start with "kvm" */ + TEST_ASSERT(!strncmp(header.id, "kvm", 3) && + strlen(header.id) < KVM_STATS_ID_MAXLEN, + "Invalid KVM stats type"); + + /* Sanity check for other fields in header */ + if (header.count == 0) + return 0; + /* Check overlap */ + TEST_ASSERT(header.desc_offset > 0 && header.data_offset > 0 + && header.desc_offset >= sizeof(header) + && header.data_offset >= sizeof(header), + "Invalid offset fields in header"); + TEST_ASSERT(header.desc_offset > header.data_offset + || (header.desc_offset + size_desc * header.count <= + header.data_offset), + "Descriptor block is overlapped with data block"); + + /* Allocate memory for stats descriptors */ + stats_desc = calloc(header.count, size_desc); + TEST_ASSERT(stats_desc, "Allocate memory for stats descriptors"); + /* Read kvm stats descriptors */ + ret = pread(stats_fd, stats_desc, + size_desc * header.count, header.desc_offset); + TEST_ASSERT(ret == size_desc * header.count, + "Read KVM stats descriptors"); + + /* Sanity check for fields in descriptors */ + for (i = 0; i < header.count; ++i) { + pdesc = (void *)stats_desc + i * size_desc; + /* Check type,unit,base boundaries */ + TEST_ASSERT((pdesc->flags & KVM_STATS_TYPE_MASK) + <= KVM_STATS_TYPE_MAX, "Unknown KVM stats type"); + TEST_ASSERT((pdesc->flags & KVM_STATS_UNIT_MASK) + <= KVM_STATS_UNIT_MAX, "Unknown KVM stats unit"); + TEST_ASSERT((pdesc->flags & KVM_STATS_BASE_MASK) + <= KVM_STATS_BASE_MAX, "Unknown KVM stats base"); + /* Check exponent for stats unit + * Exponent for counter should be greater than or equal to 0 + * Exponent for unit bytes should be greater than or equal to 0 + * Exponent for unit seconds should be less than or equal to 0 + * Exponent for unit clock cycles should be greater than or + * equal to 0 + */ + switch (pdesc->flags & KVM_STATS_UNIT_MASK) { + case KVM_STATS_UNIT_NONE: + case KVM_STATS_UNIT_BYTES: + case KVM_STATS_UNIT_CYCLES: + TEST_ASSERT(pdesc->exponent >= 0, + "Unsupported KVM stats unit"); + break; + case KVM_STATS_UNIT_SECONDS: + TEST_ASSERT(pdesc->exponent <= 0, + "Unsupported KVM stats unit"); + break; + } + /* Check name string */ + TEST_ASSERT(strlen(pdesc->name) < header.name_size, + "KVM stats name(%s) too long", pdesc->name); + /* Check size field, which should not be zero */ + TEST_ASSERT(pdesc->size, "KVM descriptor(%s) with size of 0", + pdesc->name); + size_data += pdesc->size * size_stat; + } + /* Check overlap */ + TEST_ASSERT(header.data_offset >= header.desc_offset + || header.data_offset + size_data <= header.desc_offset, + "Data block is overlapped with Descriptor block"); + /* Check validity of all stats data size */ + TEST_ASSERT(size_data >= header.count * size_stat, + "Data size is not correct"); + + /* Allocate memory for stats data */ + stats_data = malloc(size_data); + TEST_ASSERT(stats_data, "Allocate memory for stats data"); + /* Read kvm stats data as a bulk */ + ret = pread(stats_fd, stats_data, size_data, header.data_offset); + TEST_ASSERT(ret == size_data, "Read KVM stats data"); + /* Read kvm stats data one by one */ + size_data = 0; + for (i = 0; i < header.count; ++i) { + pdesc = (void *)stats_desc + i * size_desc; + ret = pread(stats_fd, stats_data, pdesc->size * size_stat, + header.data_offset + size_data); + TEST_ASSERT(ret == pdesc->size * size_stat, + "Read data of KVM stats: %s", pdesc->name); + size_data += pdesc->size * size_stat; + } + + free(stats_data); + free(stats_desc); + return 0; +} + + +int vm_stats_test(struct kvm_vm *vm) +{ + int stats_fd; + struct kvm_vm_stats_data *stats_data; + + /* Get fd for VM stats */ + stats_fd = vm_get_statsfd(vm); + TEST_ASSERT(stats_fd >= 0, "Get VM stats fd"); + + stats_test(stats_fd, sizeof(stats_data->value[0])); + close(stats_fd); + + return 0; +} + +int vcpu_stats_test(struct kvm_vm *vm, int vcpu_id) +{ + int stats_fd; + struct kvm_vcpu_stats_data *stats_data; + + /* Get fd for VCPU stats */ + stats_fd = vcpu_get_statsfd(vm, vcpu_id); + TEST_ASSERT(stats_fd >= 0, "Get VCPU stats fd"); + + stats_test(stats_fd, sizeof(stats_data->value[0])); + close(stats_fd); + + return 0; +} + +#define DEFAULT_NUM_VM 4 +#define DEFAULT_NUM_VCPU 4 + +/* + * Usage: kvm_bin_form_stats [#vm] [#vcpu] + * The first parameter #vm set the number of VMs being created. + * The second parameter #vcpu set the number of VCPUs being created. + * By default, DEFAULT_NUM_VM VM and DEFAULT_NUM_VCPU VCPU for the VM would be + * created for testing. + */ + +int main(int argc, char *argv[]) +{ + int max_vm = DEFAULT_NUM_VM, max_vcpu = DEFAULT_NUM_VCPU, ret, i, j; + struct kvm_vm **vms; + + /* Get the number of VMs and VCPUs that would be created for testing. */ + if (argc > 1) { + max_vm = strtol(argv[1], NULL, 0); + if (max_vm <= 0) + max_vm = DEFAULT_NUM_VM; + } + if (argc > 2) { + max_vcpu = strtol(argv[2], NULL, 0); + if (max_vcpu <= 0) + max_vcpu = DEFAULT_NUM_VCPU; + } + + /* Check the extension for binary stats */ + ret = kvm_check_cap(KVM_CAP_STATS_BINARY_FD); + TEST_ASSERT(ret >= 0, + "Binary form statistics interface is not supported"); + + /* Create VMs and VCPUs */ + vms = malloc(sizeof(vms[0]) * max_vm); + TEST_ASSERT(vms, "Allocate memory for storing VM pointers"); + for (i = 0; i < max_vm; ++i) { + vms[i] = vm_create(VM_MODE_DEFAULT, + DEFAULT_GUEST_PHY_PAGES, O_RDWR); + for (j = 0; j < max_vcpu; ++j) + vm_vcpu_add(vms[i], j); + } + + /* Check stats read for every VM and VCPU */ + for (i = 0; i < max_vm; ++i) { + vm_stats_test(vms[i]); + for (j = 0; j < max_vcpu; ++j) + vcpu_stats_test(vms[i], j); + } + + for (i = 0; i < max_vm; ++i) + kvm_vm_free(vms[i]); + free(vms); + return 0; +} diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index fc83f6c5902d..d9e0b2c8b906 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -2090,3 +2090,15 @@ unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size) n = DIV_ROUND_UP(size, vm_guest_mode_params[mode].page_size); return vm_adjust_num_guest_pages(mode, n); } + +int vm_get_statsfd(struct kvm_vm *vm) +{ + return ioctl(vm->fd, KVM_STATS_GETFD, NULL); +} + +int vcpu_get_statsfd(struct kvm_vm *vm, uint32_t vcpuid) +{ + struct vcpu *vcpu = vcpu_find(vm, vcpuid); + + return ioctl(vcpu->fd, KVM_STATS_GETFD, NULL); +}