From patchwork Mon Sep 4 15:43:10 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 9937393 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E64276038C for ; Mon, 4 Sep 2017 15:57:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D8ADD287E6 for ; Mon, 4 Sep 2017 15:57:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CD8DF287F5; Mon, 4 Sep 2017 15:57:53 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0674E287E6 for ; Mon, 4 Sep 2017 15:57:53 +0000 (UTC) Received: from localhost ([::1]:54554 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dotl2-0006lQ-7K for patchwork-qemu-devel@patchwork.kernel.org; Mon, 04 Sep 2017 11:57:52 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37815) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dotXg-0004l3-RX for qemu-devel@nongnu.org; Mon, 04 Sep 2017 11:44:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dotXb-0001DY-9h for qemu-devel@nongnu.org; Mon, 04 Sep 2017 11:44:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52392) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dotXa-0001CM-VN for qemu-devel@nongnu.org; Mon, 04 Sep 2017 11:43:59 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id ED39490E4F; Mon, 4 Sep 2017 15:43:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com ED39490E4F Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=david@redhat.com Received: from t460s.redhat.com (ovpn-116-139.ams2.redhat.com [10.36.116.139]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5E3A0C14C4; Mon, 4 Sep 2017 15:43:53 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Mon, 4 Sep 2017 17:43:10 +0200 Message-Id: <20170904154316.4148-14-david@redhat.com> In-Reply-To: <20170904154316.4148-1-david@redhat.com> References: <20170904154316.4148-1-david@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Mon, 04 Sep 2017 15:43:58 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 13/19] target/s390x: use "core-id" for cpu number/address/id handling X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, Eduardo Habkost , david@redhat.com, cohuck@redhat.com, Richard Henderson , Alexander Graf , borntraeger@de.ibm.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Some time ago we discussed that using "id" as property name is not the right thing to do, as it is a reserved property for other devices and will not work with device_add. Switch to the term "core-id" instead, and use it as an equivalent to "CPU address" mentioned in the PoP. There is no such thing as cpu number, so rename env.cpu_num to env.core_id. We use "core-id" as this is the common term to use for device_add later on (x86 and ppc). We can get rid of cpu->id now. Keep cpu_index and env->core_id in sync. cpu_index was already implicitly used by e.g. cpu_exists(), so keeping both in sync seems to be the right thing to do. cpu_index will now no longer automatically get set via cpu_exec_realizefn(). For now, we were lucky that both implicitly stayed in sync. Our new cpu property "core-id" can be a static property. Range checks can be avoided by using the correct type and the "setting after realized" check is done implicitly. device_add will later need the reserved "id" property. Hotplugging a CPU on s390x will then be: "device_add host-s390-cpu,id=cpu2,core-id=2". Signed-off-by: David Hildenbrand Reviewed-by: Matthew Rosato --- hw/s390x/s390-virtio-ccw.c | 2 +- target/s390x/cpu.c | 71 +++++++++++++--------------------------------- target/s390x/cpu.h | 5 ++-- target/s390x/cpu_models.c | 2 +- target/s390x/excp_helper.c | 2 +- target/s390x/helper.c | 4 +-- target/s390x/misc_helper.c | 4 +-- target/s390x/translate.c | 5 +--- 8 files changed, 29 insertions(+), 66 deletions(-) diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index f7ca20d77a..22a8a1b45d 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -311,7 +311,7 @@ static void s390_cpu_plug(HotplugHandler *hotplug_dev, S390CPU *cpu = S390_CPU(dev); CPUState *cs = CPU(dev); - name = g_strdup_printf("cpu[%i]", cpu->env.cpu_num); + name = g_strdup_printf("cpu[%i]", cpu->env.core_id); object_property_set_link(OBJECT(hotplug_dev), OBJECT(cs), name, errp); g_free(name); diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c index 5f9315fb16..a2570bbc6b 100644 --- a/target/s390x/cpu.c +++ b/target/s390x/cpu.c @@ -36,6 +36,7 @@ #include "trace.h" #include "qapi/visitor.h" #include "exec/exec-all.h" +#include "hw/qdev-properties.h" #ifndef CONFIG_USER_ONLY #include "hw/hw.h" #include "sysemu/arch_init.h" @@ -189,28 +190,30 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp) } #if !defined(CONFIG_USER_ONLY) - if (cpu->id >= max_cpus) { - error_setg(&err, "Unable to add CPU: %" PRIi64 - ", max allowed: %d", cpu->id, max_cpus - 1); + if (cpu->env.core_id >= max_cpus) { + error_setg(&err, "Unable to add CPU: %" PRIu32 ", max allowed: %d", + cpu->env.core_id, max_cpus - 1); goto out; } #else /* implicitly set for linux-user only */ - cpu->id = scc->next_cpu_id; + cpu->env.core_id = scc->next_cpu_id; #endif - if (cpu_exists(cpu->id)) { - error_setg(&err, "Unable to add CPU: %" PRIi64 - ", it already exists", cpu->id); + if (cpu_exists(cpu->env.core_id)) { + error_setg(&err, "Unable to add CPU: %" PRIu32 ", it already exists", + cpu->env.core_id); goto out; } - if (cpu->id != scc->next_cpu_id) { - error_setg(&err, "Unable to add CPU: %" PRIi64 - ", The next available id is %" PRIi64, cpu->id, + if (cpu->env.core_id != scc->next_cpu_id) { + error_setg(&err, "Unable to add CPU: %" PRIu32 + ", the next available nr is %" PRIi64, cpu->env.core_id, scc->next_cpu_id); goto out; } + /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */ + cs->cpu_index = env->core_id; cpu_exec_realizefn(cs, &err); if (err != NULL) { goto out; @@ -220,7 +223,6 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp) #if !defined(CONFIG_USER_ONLY) qemu_register_reset(s390_cpu_machine_reset_cb, cpu); #endif - env->cpu_num = cpu->id; s390_cpu_gdb_init(cs); qemu_init_vcpu(cs); #if !defined(CONFIG_USER_ONLY) @@ -241,45 +243,6 @@ out: error_propagate(errp, err); } -static void s390x_cpu_get_id(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - S390CPU *cpu = S390_CPU(obj); - int64_t value = cpu->id; - - visit_type_int(v, name, &value, errp); -} - -static void s390x_cpu_set_id(Object *obj, Visitor *v, const char *name, - void *opaque, Error **errp) -{ - S390CPU *cpu = S390_CPU(obj); - DeviceState *dev = DEVICE(obj); - const int64_t min = 0; - const int64_t max = UINT32_MAX; - Error *err = NULL; - int64_t value; - - if (dev->realized) { - error_setg(errp, "Attempt to set property '%s' on '%s' after " - "it was realized", name, object_get_typename(obj)); - return; - } - - visit_type_int(v, name, &value, &err); - if (err) { - error_propagate(errp, err); - return; - } - if (value < min || value > max) { - error_setg(errp, "Property %s.%s doesn't take value %" PRId64 - " (minimum: %" PRId64 ", maximum: %" PRId64 ")" , - object_get_typename(obj), name, value, min, max); - return; - } - cpu->id = value; -} - static void s390_cpu_initfn(Object *obj) { CPUState *cs = CPU(obj); @@ -293,8 +256,6 @@ static void s390_cpu_initfn(Object *obj) cs->env_ptr = env; cs->halted = 1; cs->exception_index = EXCP_HLT; - object_property_add(OBJECT(cpu), "id", "int64_t", s390x_cpu_get_id, - s390x_cpu_set_id, NULL, NULL, NULL); s390_cpu_model_register_props(obj); #if !defined(CONFIG_USER_ONLY) qemu_get_timedate(&tm, 0); @@ -491,6 +452,11 @@ static gchar *s390_gdb_arch_name(CPUState *cs) return g_strdup("s390:64-bit"); } +static Property s390x_cpu_properties[] = { + DEFINE_PROP_UINT32("core-id", S390CPU, env.core_id, 0), + DEFINE_PROP_END_OF_LIST() +}; + static void s390_cpu_class_init(ObjectClass *oc, void *data) { S390CPUClass *scc = S390_CPU_CLASS(oc); @@ -500,6 +466,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data) scc->next_cpu_id = 0; scc->parent_realize = dc->realize; dc->realize = s390_cpu_realizefn; + dc->props = s390x_cpu_properties; scc->parent_reset = cc->reset; #if !defined(CONFIG_USER_ONLY) diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index dca6aa9aae..878b6cc83e 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -149,7 +149,7 @@ typedef struct CPUS390XState { CPU_COMMON - uint32_t cpu_num; + uint32_t core_id; /* PoP "CPU address", same as cpu_index */ uint64_t cpuid; uint64_t tod_offset; @@ -193,7 +193,6 @@ typedef struct S390CPU { /*< public >*/ CPUS390XState env; - int64_t id; S390CPUModel *model; /* needed for live migration */ void *irqstate; @@ -691,7 +690,7 @@ const char *s390_default_cpu_model_name(void); /* helper.c */ #define cpu_init(cpu_model) cpu_generic_init(TYPE_S390_CPU, cpu_model) -S390CPU *s390x_new_cpu(const char *cpu_model, int64_t id, Error **errp); +S390CPU *s390x_new_cpu(const char *cpu_model, uint32_t core_id, Error **errp); /* you can call this signal handler from your SIGBUS and SIGSEGV signal handlers to inform the virtual CPU of exceptions. non zero is returned if the signal was handled by the virtual CPU. */ diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c index 18cbf91d9c..8e20e7637b 100644 --- a/target/s390x/cpu_models.c +++ b/target/s390x/cpu_models.c @@ -915,7 +915,7 @@ void s390_realize_cpu_model(CPUState *cs, Error **errp) cpu->env.cpuid = s390_cpuid_from_cpu_model(cpu->model); if (tcg_enabled()) { /* basic mode, write the cpu address into the first 4 bit of the ID */ - cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.cpu_num); + cpu->env.cpuid = deposit64(cpu->env.cpuid, 54, 4, cpu->env.core_id); } } diff --git a/target/s390x/excp_helper.c b/target/s390x/excp_helper.c index 14d3160e92..470cf8f5bc 100644 --- a/target/s390x/excp_helper.c +++ b/target/s390x/excp_helper.c @@ -250,7 +250,7 @@ static void do_ext_interrupt(CPUS390XState *env) lowcore->ext_params2 = cpu_to_be64(q->param64); lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env)); lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr); - lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64); + lowcore->cpu_addr = cpu_to_be16(env->core_id | VIRTIO_SUBCODE_64); mask = be64_to_cpu(lowcore->external_new_psw.mask); addr = be64_to_cpu(lowcore->external_new_psw.addr); diff --git a/target/s390x/helper.c b/target/s390x/helper.c index ba29504476..dfb24ef5b2 100644 --- a/target/s390x/helper.c +++ b/target/s390x/helper.c @@ -104,7 +104,7 @@ S390CPU *cpu_s390x_create(const char *cpu_model, Error **errp) return S390_CPU(CPU(object_new(typename))); } -S390CPU *s390x_new_cpu(const char *cpu_model, int64_t id, Error **errp) +S390CPU *s390x_new_cpu(const char *cpu_model, uint32_t core_id, Error **errp) { S390CPU *cpu; Error *err = NULL; @@ -114,7 +114,7 @@ S390CPU *s390x_new_cpu(const char *cpu_model, int64_t id, Error **errp) goto out; } - object_property_set_int(OBJECT(cpu), id, "id", &err); + object_property_set_int(OBJECT(cpu), core_id, "core-id", &err); if (err != NULL) { goto out; } diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c index 5096286157..a3785a9c8d 100644 --- a/target/s390x/misc_helper.c +++ b/target/s390x/misc_helper.c @@ -231,7 +231,7 @@ uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0, /* XXX make different for different CPUs? */ ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16); ebcdic_put(sysib.plant, "QEMU", 4); - stw_p(&sysib.cpu_addr, env->cpu_num); + stw_p(&sysib.cpu_addr, env->core_id); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else if ((sel1 == 2) && (sel2 == 2)) { /* Basic Machine CPUs */ @@ -259,7 +259,7 @@ uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0, /* XXX make different for different CPUs? */ ebcdic_put(sysib.sequence, "QEMUQEMUQEMUQEMU", 16); ebcdic_put(sysib.plant, "QEMU", 4); - stw_p(&sysib.cpu_addr, env->cpu_num); + stw_p(&sysib.cpu_addr, env->core_id); stw_p(&sysib.cpu_id, 0); cpu_physical_memory_write(a0, &sysib, sizeof(sysib)); } else if ((sel1 == 2) && (sel2 == 2)) { diff --git a/target/s390x/translate.c b/target/s390x/translate.c index 4b0db7b7bd..b8963f2fe2 100644 --- a/target/s390x/translate.c +++ b/target/s390x/translate.c @@ -3822,10 +3822,7 @@ static ExitStatus op_ssm(DisasContext *s, DisasOps *o) static ExitStatus op_stap(DisasContext *s, DisasOps *o) { check_privileged(s); - /* ??? Surely cpu address != cpu number. In any case the previous - version of this stored more than the required half-word, so it - is unlikely this has ever been tested. */ - tcg_gen_ld32u_i64(o->out, cpu_env, offsetof(CPUS390XState, cpu_num)); + tcg_gen_ld32u_i64(o->out, cpu_env, offsetof(CPUS390XState, core_id)); return NO_EXIT; }