From patchwork Sat Apr 18 06:23:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Huang X-Patchwork-Id: 6236601 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E0B0B9F389 for ; Sat, 18 Apr 2015 06:24:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E411E203A4 for ; Sat, 18 Apr 2015 06:24:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF98E203AB for ; Sat, 18 Apr 2015 06:24:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751039AbbDRGX7 (ORCPT ); Sat, 18 Apr 2015 02:23:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42299 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750847AbbDRGX4 (ORCPT ); Sat, 18 Apr 2015 02:23:56 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id 8027FAC7D2; Sat, 18 Apr 2015 06:23:56 +0000 (UTC) Received: from virtblade05.virt.lab.eng.bos.redhat.com (virtblade05.virt.lab.eng.bos.redhat.com [10.19.152.75]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t3I6Nswi016422; Sat, 18 Apr 2015 02:23:55 -0400 From: Wei Huang To: kvm@vger.kernel.org Cc: gleb@kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com, joro@8bytes.org Subject: [PATCH V3 1/4] KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch Date: Sat, 18 Apr 2015 02:23:49 -0400 Message-Id: <1429338232-11938-2-git-send-email-wei@redhat.com> In-Reply-To: <1429338232-11938-1-git-send-email-wei@redhat.com> References: <1429338232-11938-1-git-send-email-wei@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch defines a new function pointer struct (kvm_pmu_ops) to support vPMU for both Intel and AMD. The functions pointers defined in this new struct will be linked with Intel and AMD functions later. In the meanwhile the struct that maps from event_sel bits to PERF_TYPE_HARDWARE events is renamed and moved from Intel specific code to kvm_host.h as a common struct. Signed-off-by: Wei Huang --- arch/x86/include/asm/kvm_host.h | 34 ++++++++++++++++++++++++++++------ arch/x86/kvm/pmu.c | 21 ++++++++------------- 2 files changed, 36 insertions(+), 19 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index dea2e7e..1aa8b48 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -305,6 +305,12 @@ struct kvm_mmu { u64 pdptrs[4]; /* pae */ }; +struct msr_data { + bool host_initiated; + u32 index; + u64 data; +}; + enum pmc_type { KVM_PMC_GP = 0, KVM_PMC_FIXED, @@ -319,6 +325,12 @@ struct kvm_pmc { struct kvm_vcpu *vcpu; }; +struct kvm_event_hw_type_mapping { + u8 eventsel; + u8 unit_mask; + unsigned event_type; +}; + struct kvm_pmu { unsigned nr_arch_gp_counters; unsigned nr_arch_fixed_counters; @@ -337,6 +349,22 @@ struct kvm_pmu { u64 reprogram_pmi; }; +struct kvm_pmu_ops { + unsigned (*find_arch_event)(struct kvm_pmu *pmu, u8 event_select, + u8 unit_mask); + unsigned (*find_fixed_event)(int idx); + bool (*pmc_enabled)(struct kvm_pmc *pmc); + struct kvm_pmc *(*pmc_idx_to_pmc)(struct kvm_pmu *pmu, int pmc_idx); + int (*check_msr)(struct kvm_vcpu *vcpu, unsigned msr); + struct kvm_pmc *(*msr_to_pmc)(struct kvm_vcpu *vcpu, unsigned idx); + bool (*is_pmu_msr)(struct kvm_vcpu *vcpu, u32 msr); + int (*get_msr)(struct kvm_vcpu *vcpu, u32 index, u64 *data); + int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info); + void (*refresh)(struct kvm_vcpu *vcpu); + void (*init)(struct kvm_vcpu *vcpu); + void (*reset)(struct kvm_vcpu *vcpu); +}; + enum { KVM_DEBUGREG_BP_ENABLED = 1, KVM_DEBUGREG_WONT_EXIT = 2, @@ -679,12 +707,6 @@ struct kvm_vcpu_stat { struct x86_instruction_info; -struct msr_data { - bool host_initiated; - u32 index; - u64 data; -}; - struct kvm_lapic_irq { u32 vector; u32 delivery_mode; diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index 29fbf9d..3af3404 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -20,12 +20,7 @@ #include "cpuid.h" #include "lapic.h" -static struct kvm_arch_event_perf_mapping { - u8 eventsel; - u8 unit_mask; - unsigned event_type; - bool inexact; -} arch_events[] = { +static struct kvm_event_hw_type_mapping intel_arch_events[] = { /* Index must match CPUID 0x0A.EBX bit vector */ [0] = { 0x3c, 0x00, PERF_COUNT_HW_CPU_CYCLES }, [1] = { 0xc0, 0x00, PERF_COUNT_HW_INSTRUCTIONS }, @@ -37,7 +32,7 @@ static struct kvm_arch_event_perf_mapping { [7] = { 0x00, 0x30, PERF_COUNT_HW_REF_CPU_CYCLES }, }; -/* mapping between fixed pmc index and arch_events array */ +/* mapping between fixed pmc index and intel_arch_events array */ static int fixed_pmc_events[] = {1, 0, 7}; static bool pmc_is_gp(struct kvm_pmc *pmc) @@ -202,16 +197,16 @@ static unsigned find_arch_event(struct kvm_pmu *pmu, u8 event_select, { int i; - for (i = 0; i < ARRAY_SIZE(arch_events); i++) - if (arch_events[i].eventsel == event_select - && arch_events[i].unit_mask == unit_mask + for (i = 0; i < ARRAY_SIZE(intel_arch_events); i++) + if (intel_arch_events[i].eventsel == event_select + && intel_arch_events[i].unit_mask == unit_mask && (pmu->available_event_types & (1 << i))) break; - if (i == ARRAY_SIZE(arch_events)) + if (i == ARRAY_SIZE(intel_arch_events)) return PERF_COUNT_HW_MAX; - return arch_events[i].event_type; + return intel_arch_events[i].event_type; } static void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel) @@ -265,7 +260,7 @@ static void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 en_pmi, int idx) return; reprogram_counter(pmc, PERF_TYPE_HARDWARE, - arch_events[fixed_pmc_events[idx]].event_type, + intel_arch_events[fixed_pmc_events[idx]].event_type, !(en & 0x2), /* exclude user */ !(en & 0x1), /* exclude kernel */ pmi, false, false);