From patchwork Mon May 6 06:56:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SsO8cmdlbiBHcm/Dnw==?= X-Patchwork-Id: 10930513 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A5A941390 for ; Mon, 6 May 2019 06:58:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 92B7228590 for ; Mon, 6 May 2019 06:58:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8692F2861E; Mon, 6 May 2019 06:58:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8F10F28590 for ; Mon, 6 May 2019 06:58:37 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hNXYp-0002OG-CP; Mon, 06 May 2019 06:57:15 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hNXYi-00028X-3a for xen-devel@lists.xenproject.org; Mon, 06 May 2019 06:57:08 +0000 X-Inumbo-ID: 250093d4-6fcc-11e9-ab88-e374a13293b4 Received: from mx1.suse.de (unknown [195.135.220.15]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 250093d4-6fcc-11e9-ab88-e374a13293b4; Mon, 06 May 2019 06:57:00 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 36C47AF25; Mon, 6 May 2019 06:56:55 +0000 (UTC) From: Juergen Gross To: xen-devel@lists.xenproject.org Date: Mon, 6 May 2019 08:56:23 +0200 Message-Id: <20190506065644.7415-25-jgross@suse.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190506065644.7415-1-jgross@suse.com> References: <20190506065644.7415-1-jgross@suse.com> Subject: [Xen-devel] [PATCH RFC V2 24/45] xen: let vcpu_create() select processor X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Julien Grall , Jan Beulich , Dario Faggioli , =?utf-8?q?Roger_Pau_Monn=C3=A9?= MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Today there are two distinct scenarios for vcpu_create(): either for creation of idle-domain vcpus (vcpuid == processor) or for creation of "normal" domain vcpus (including dom0), where the caller selects the initial processor on a round-robin scheme of the allowed processors (allowed being based on cpupool and affinities). Instead of passing the initial processor to vcpu_create() and passing on to sched_init_vcpu() let sched_init_vcpu() do the processor selection. For supporting dom0 vcpu creation use the node_affinity of the domain as a base for selecting the processors. User domains will have initially all nodes set, so this is no different behavior compared to today. Signed-off-by: Juergen Gross Acked-by: Andrew Cooper --- RFC V2: add ASSERT(), modify error message (Andrew Cooper) --- xen/arch/arm/domain_build.c | 13 ++++++------- xen/arch/x86/dom0_build.c | 10 +++------- xen/arch/x86/hvm/dom0_build.c | 9 ++------- xen/arch/x86/pv/dom0_build.c | 10 ++-------- xen/common/domain.c | 5 ++--- xen/common/domctl.c | 10 ++-------- xen/common/schedule.c | 34 +++++++++++++++++++++++++++++++--- xen/include/asm-x86/dom0_build.h | 3 +-- xen/include/xen/domain.h | 3 +-- xen/include/xen/sched.h | 2 +- 10 files changed, 51 insertions(+), 48 deletions(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index d9836779d1..86a6e4bf7b 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -80,7 +80,7 @@ unsigned int __init dom0_max_vcpus(void) struct vcpu *__init alloc_dom0_vcpu0(struct domain *dom0) { - return vcpu_create(dom0, 0, 0); + return vcpu_create(dom0, 0); } static unsigned int __init get_allocation_size(paddr_t size) @@ -1923,7 +1923,7 @@ static void __init find_gnttab_region(struct domain *d, static int __init construct_domain(struct domain *d, struct kernel_info *kinfo) { - int i, cpu; + int i; struct vcpu *v = d->vcpu[0]; struct cpu_user_regs *regs = &v->arch.cpu_info->guest_cpu_user_regs; @@ -1986,12 +1986,11 @@ static int __init construct_domain(struct domain *d, struct kernel_info *kinfo) } #endif - for ( i = 1, cpu = 0; i < d->max_vcpus; i++ ) + for ( i = 1; i < d->max_vcpus; i++ ) { - cpu = cpumask_cycle(cpu, &cpu_online_map); - if ( vcpu_create(d, i, cpu) == NULL ) + if ( vcpu_create(d, i) == NULL ) { - printk("Failed to allocate dom0 vcpu %d on pcpu %d\n", i, cpu); + printk("Failed to allocate d0v%u\n", i); break; } @@ -2026,7 +2025,7 @@ static int __init construct_domU(struct domain *d, kinfo.vpl011 = dt_property_read_bool(node, "vpl011"); - if ( vcpu_create(d, 0, 0) == NULL ) + if ( vcpu_create(d, 0) == NULL ) return -ENOMEM; d->max_pages = ~0U; diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c index 73f5407b0d..e550db8b03 100644 --- a/xen/arch/x86/dom0_build.c +++ b/xen/arch/x86/dom0_build.c @@ -198,12 +198,9 @@ custom_param("dom0_nodes", parse_dom0_nodes); static cpumask_t __initdata dom0_cpus; -struct vcpu *__init dom0_setup_vcpu(struct domain *d, - unsigned int vcpu_id, - unsigned int prev_cpu) +struct vcpu *__init dom0_setup_vcpu(struct domain *d, unsigned int vcpu_id) { - unsigned int cpu = cpumask_cycle(prev_cpu, &dom0_cpus); - struct vcpu *v = vcpu_create(d, vcpu_id, cpu); + struct vcpu *v = vcpu_create(d, vcpu_id); if ( v ) { @@ -273,8 +270,7 @@ struct vcpu *__init alloc_dom0_vcpu0(struct domain *dom0) dom0->node_affinity = dom0_nodes; dom0->auto_node_affinity = !dom0_nr_pxms; - return dom0_setup_vcpu(dom0, 0, - cpumask_last(&dom0_cpus) /* so it wraps around to first pcpu */); + return dom0_setup_vcpu(dom0, 0); } #ifdef CONFIG_SHADOW_PAGING diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c index aa599f09ef..15166bbaa9 100644 --- a/xen/arch/x86/hvm/dom0_build.c +++ b/xen/arch/x86/hvm/dom0_build.c @@ -614,7 +614,7 @@ static int __init pvh_setup_cpus(struct domain *d, paddr_t entry, paddr_t start_info) { struct vcpu *v = d->vcpu[0]; - unsigned int cpu = v->processor, i; + unsigned int i; int rc; /* * This sets the vCPU state according to the state described in @@ -636,12 +636,7 @@ static int __init pvh_setup_cpus(struct domain *d, paddr_t entry, }; for ( i = 1; i < d->max_vcpus; i++ ) - { - const struct vcpu *p = dom0_setup_vcpu(d, i, cpu); - - if ( p ) - cpu = p->processor; - } + dom0_setup_vcpu(d, i); domain_update_node_affinity(d); diff --git a/xen/arch/x86/pv/dom0_build.c b/xen/arch/x86/pv/dom0_build.c index cef2d42254..800b3e6b7d 100644 --- a/xen/arch/x86/pv/dom0_build.c +++ b/xen/arch/x86/pv/dom0_build.c @@ -285,7 +285,7 @@ int __init dom0_construct_pv(struct domain *d, module_t *initrd, char *cmdline) { - int i, cpu, rc, compatible, order, machine; + int i, rc, compatible, order, machine; struct cpu_user_regs *regs; unsigned long pfn, mfn; unsigned long nr_pages; @@ -693,14 +693,8 @@ int __init dom0_construct_pv(struct domain *d, printk("Dom%u has maximum %u VCPUs\n", d->domain_id, d->max_vcpus); - cpu = v->processor; for ( i = 1; i < d->max_vcpus; i++ ) - { - const struct vcpu *p = dom0_setup_vcpu(d, i, cpu); - - if ( p ) - cpu = p->processor; - } + dom0_setup_vcpu(d, i); domain_update_node_affinity(d); d->arch.paging.mode = 0; diff --git a/xen/common/domain.c b/xen/common/domain.c index 1c0abda66f..78a838fab3 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -129,8 +129,7 @@ static void vcpu_destroy(struct vcpu *v) free_vcpu_struct(v); } -struct vcpu *vcpu_create( - struct domain *d, unsigned int vcpu_id, unsigned int cpu_id) +struct vcpu *vcpu_create(struct domain *d, unsigned int vcpu_id) { struct vcpu *v; @@ -162,7 +161,7 @@ struct vcpu *vcpu_create( init_waitqueue_vcpu(v); } - if ( sched_init_vcpu(v, cpu_id) != 0 ) + if ( sched_init_vcpu(v) != 0 ) goto fail_wq; if ( arch_vcpu_create(v) != 0 ) diff --git a/xen/common/domctl.c b/xen/common/domctl.c index 8464713d2b..3f86a336cc 100644 --- a/xen/common/domctl.c +++ b/xen/common/domctl.c @@ -540,8 +540,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) case XEN_DOMCTL_max_vcpus: { - unsigned int i, max = op->u.max_vcpus.max, cpu; - cpumask_t *online; + unsigned int i, max = op->u.max_vcpus.max; ret = -EINVAL; if ( (d == current->domain) || /* no domain_pause() */ @@ -552,18 +551,13 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) domain_pause(d); ret = -ENOMEM; - online = cpupool_domain_cpumask(d); for ( i = 0; i < max; i++ ) { if ( d->vcpu[i] != NULL ) continue; - cpu = (i == 0) ? - cpumask_any(online) : - cpumask_cycle(d->vcpu[i-1]->processor, online); - - if ( vcpu_create(d, i, cpu) == NULL ) + if ( vcpu_create(d, i) == NULL ) goto maxvcpu_out; } diff --git a/xen/common/schedule.c b/xen/common/schedule.c index dfd261d029..9c54811e86 100644 --- a/xen/common/schedule.c +++ b/xen/common/schedule.c @@ -314,14 +314,42 @@ static struct sched_item *sched_alloc_item(struct vcpu *v) return NULL; } -int sched_init_vcpu(struct vcpu *v, unsigned int processor) +static unsigned int sched_select_initial_cpu(struct vcpu *v) +{ + struct domain *d = v->domain; + nodeid_t node; + cpumask_t cpus; + + cpumask_clear(&cpus); + for_each_node_mask ( node, d->node_affinity ) + cpumask_or(&cpus, &cpus, &node_to_cpumask(node)); + cpumask_and(&cpus, &cpus, cpupool_domain_cpumask(d)); + if ( cpumask_empty(&cpus) ) + cpumask_copy(&cpus, cpupool_domain_cpumask(d)); + + if ( v->vcpu_id == 0 ) + return cpumask_first(&cpus); + + /* We can rely on previous vcpu being available. */ + ASSERT(!is_idle_domain(d)); + + return cpumask_cycle(d->vcpu[v->vcpu_id - 1]->processor, &cpus); +} + +int sched_init_vcpu(struct vcpu *v) { struct domain *d = v->domain; struct sched_item *item; + unsigned int processor; if ( (item = sched_alloc_item(v)) == NULL ) return 1; + if ( is_idle_domain(d) ) + processor = v->vcpu_id; + else + processor = sched_select_initial_cpu(v); + sched_set_res(item, per_cpu(sched_res, processor)); /* Initialise the per-vcpu timers. */ @@ -1673,7 +1701,7 @@ static int cpu_schedule_up(unsigned int cpu) return 0; if ( idle_vcpu[cpu] == NULL ) - vcpu_create(idle_vcpu[0]->domain, cpu, cpu); + vcpu_create(idle_vcpu[0]->domain, cpu); else { struct vcpu *idle = idle_vcpu[cpu]; @@ -1867,7 +1895,7 @@ void __init scheduler_init(void) BUG_ON(nr_cpu_ids > ARRAY_SIZE(idle_vcpu)); idle_domain->vcpu = idle_vcpu; idle_domain->max_vcpus = nr_cpu_ids; - if ( vcpu_create(idle_domain, 0, 0) == NULL ) + if ( vcpu_create(idle_domain, 0) == NULL ) BUG(); this_cpu(sched_res)->curr = idle_vcpu[0]->sched_item; this_cpu(sched_res)->sched_priv = sched_alloc_pdata(&ops, 0); diff --git a/xen/include/asm-x86/dom0_build.h b/xen/include/asm-x86/dom0_build.h index 33a5483739..3eb4b036e1 100644 --- a/xen/include/asm-x86/dom0_build.h +++ b/xen/include/asm-x86/dom0_build.h @@ -11,8 +11,7 @@ extern unsigned int dom0_memflags; unsigned long dom0_compute_nr_pages(struct domain *d, struct elf_dom_parms *parms, unsigned long initrd_len); -struct vcpu *dom0_setup_vcpu(struct domain *d, unsigned int vcpu_id, - unsigned int cpu); +struct vcpu *dom0_setup_vcpu(struct domain *d, unsigned int vcpu_id); int dom0_setup_permissions(struct domain *d); int dom0_construct_pv(struct domain *d, const module_t *image, diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h index d1bfc82f57..a6e929685c 100644 --- a/xen/include/xen/domain.h +++ b/xen/include/xen/domain.h @@ -13,8 +13,7 @@ typedef union { struct compat_vcpu_guest_context *cmp; } vcpu_guest_context_u __attribute__((__transparent_union__)); -struct vcpu *vcpu_create( - struct domain *d, unsigned int vcpu_id, unsigned int cpu_id); +struct vcpu *vcpu_create(struct domain *d, unsigned int vcpu_id); unsigned int dom0_max_vcpus(void); struct vcpu *alloc_dom0_vcpu0(struct domain *dom0); diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index da117365af..8052f98780 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -663,7 +663,7 @@ void __domain_crash(struct domain *d); void noreturn asm_domain_crash_synchronous(unsigned long addr); void scheduler_init(void); -int sched_init_vcpu(struct vcpu *v, unsigned int processor); +int sched_init_vcpu(struct vcpu *v); void sched_destroy_vcpu(struct vcpu *v); int sched_init_domain(struct domain *d, int poolid); void sched_destroy_domain(struct domain *d);