From patchwork Fri Jul 10 16:17:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 278067 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC198C433DF for ; Fri, 10 Jul 2020 16:38:32 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A2E9C20725 for ; Fri, 10 Jul 2020 16:38:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="TpPH1Etn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2E9C20725 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:41322 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jtw2h-00067e-UC for qemu-devel@archiver.kernel.org; Fri, 10 Jul 2020 12:38:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43810) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jtvjK-00025v-VY for qemu-devel@nongnu.org; Fri, 10 Jul 2020 12:18:31 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:43486 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jtvjI-0005aG-VQ for qemu-devel@nongnu.org; Fri, 10 Jul 2020 12:18:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1594397908; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YS3EUTQ0l8ceq/oSCvz304x4tc+rVeDBnloFqce7ihk=; b=TpPH1EtnYWVpbutUbzE0ZOPPxXC++aczdKZndPdUKK7q4vTv65S6q6FVHrkm9lMHJnL0Lx Vl7agmeEHA5K7fSo1nesag9u/RqbmE/aPefgzPE1Bbh4RLpejBoiM18XqCu5yrOTsaaMA4 56a27B0MbRcSkL9PKn1lv0gR2TTdDC8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-453-xweXzFGGMquANDjqg556uA-1; Fri, 10 Jul 2020 12:17:15 -0400 X-MC-Unique: xweXzFGGMquANDjqg556uA-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 507A9107ACCA; Fri, 10 Jul 2020 16:17:14 +0000 (UTC) Received: from dell-r430-03.lab.eng.brq.redhat.com (dell-r430-03.lab.eng.brq.redhat.com [10.37.153.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 523787EFA5; Fri, 10 Jul 2020 16:17:13 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [RFC 3/3] x68: acpi: trigger SMI before scanning for hotplugged CPUs Date: Fri, 10 Jul 2020 12:17:04 -0400 Message-Id: <20200710161704.309824-4-imammedo@redhat.com> In-Reply-To: <20200710161704.309824-1-imammedo@redhat.com> References: <20200710161704.309824-1-imammedo@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.120; envelope-from=imammedo@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/10 04:36:30 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lersek@redhat.com, boris.ostrovsky@oracle.com, liran.alon@oracle.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" In case firmware has negotiated CPU hotplug SMI feature, generate AML to describe SMI IO port region and send SMI to firmware on each CPU hotplug SCI. It might be not really usable, but should serve as a starting point to discuss how better to deal with split hotplug sequence during hot-add ( ex scenario where it will break is: hot-add -> (QEMU) add CPU in hotplug regs -> (QEMU) SCI -1-> (OS) scan -1-> (OS) SMI -1-> (FW) pull in CPU1 *** -1-> (OS) start iterating hotplug regs hot-add -> (QEMU) add CPU in hotplug regs -> (QEMU) SCI -2-> (OS) scan (blocked on mutex till previous scan is finished) -1-> (OS) 1st added CPU1 send device check event -> INIT/SIPI -1-> (OS) 1st added CPU2 send device check event -> INIT/SIPI that's where it explodes, since FW didn't see CPU2 when SMI was called ) hot remove will throw in yet another set of problems, so lets discuss both here and see if we can really share hotplug registers block between FW and AML or we should do something else with it. Signed-off-by: Igor Mammedov --- v0: - s/aml_string/aml_eisaid/ /fixes Windows BSOD, on nonsense value/ (Laszlo Ersek ) - put SMI device under PCI0 like the rest of hotplug IO port - do not generate SMI AML if CPU hotplug SMI feature hasn't been negotiated --- include/hw/acpi/cpu.h | 1 + hw/acpi/cpu.c | 6 ++++++ hw/i386/acpi-build.c | 33 ++++++++++++++++++++++++++++++++- hw/isa/lpc_ich9.c | 3 +++ 4 files changed, 42 insertions(+), 1 deletion(-) diff --git a/include/hw/acpi/cpu.h b/include/hw/acpi/cpu.h index 62f0278ba2..0eeedaa491 100644 --- a/include/hw/acpi/cpu.h +++ b/include/hw/acpi/cpu.h @@ -50,6 +50,7 @@ void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner, typedef struct CPUHotplugFeatures { bool acpi_1_compatible; bool has_legacy_cphp; + const char *smi_path; } CPUHotplugFeatures; void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c index 3d6a500fb7..6539bc23f6 100644 --- a/hw/acpi/cpu.c +++ b/hw/acpi/cpu.c @@ -14,6 +14,8 @@ #define ACPI_CPU_CMD_DATA_OFFSET_RW 8 #define ACPI_CPU_CMD_DATA2_OFFSET_R 0 +#define OVMF_CPUHP_SMI_CMD 4 + enum { CPHP_GET_NEXT_CPU_WITH_EVENT_CMD = 0, CPHP_OST_EVENT_CMD = 1, @@ -473,6 +475,10 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD); aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); + if (opts.smi_path) { + aml_append(method, aml_store(aml_int(OVMF_CPUHP_SMI_CMD), + aml_name("%s", opts.smi_path))); + } aml_append(method, aml_store(one, has_event)); while_ctx = aml_while(aml_equal(has_event, one)); { diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index b7bcbbbb2a..1e21386f0c 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -95,6 +95,7 @@ typedef struct AcpiPmInfo { bool s3_disabled; bool s4_disabled; bool pcihp_bridge_en; + bool smi_on_cpuhp; uint8_t s4_val; AcpiFadtData fadt; uint16_t cpu_hp_io_base; @@ -194,6 +195,7 @@ static void acpi_get_pm_info(MachineState *machine, AcpiPmInfo *pm) pm->cpu_hp_io_base = 0; pm->pcihp_io_base = 0; pm->pcihp_io_len = 0; + pm->smi_on_cpuhp = false; assert(obj); init_common_fadt_data(machine, obj, &pm->fadt); @@ -213,6 +215,9 @@ static void acpi_get_pm_info(MachineState *machine, AcpiPmInfo *pm) pm->fadt.reset_val = 0xf; pm->fadt.flags |= 1 << ACPI_FADT_F_RESET_REG_SUP; pm->cpu_hp_io_base = ICH9_CPU_HOTPLUG_IO_BASE; + pm->smi_on_cpuhp = + !!(object_property_get_uint(lpc, "x-smi-negotiated-features", NULL) + & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT)); } /* The above need not be conditional on machine type because the reset port @@ -1515,6 +1520,31 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, aml_append(dev, aml_name_decl("_UID", aml_int(1))); aml_append(dev, build_q35_osc_method()); aml_append(sb_scope, dev); + + if (pm->smi_on_cpuhp) { + /* reserve SMI block resources */ + dev = aml_device("PCI0.SMI0"); + aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A06"))); + aml_append(dev, aml_name_decl("_UID", aml_string("SMI resources"))); + crs = aml_resource_template(); + aml_append(crs, + aml_io( + AML_DECODE16, + ACPI_PORT_SMI_CMD, + ACPI_PORT_SMI_CMD, + 1, + 1) + ); + aml_append(dev, aml_name_decl("_CRS", crs)); + aml_append(dev, aml_operation_region("SMIR", AML_SYSTEM_IO, + aml_int(0xB2), 1)); + field = aml_field("SMIR", AML_BYTE_ACC, AML_NOLOCK, + AML_WRITE_AS_ZEROS); + aml_append(field, aml_named_field("SMIC", 8)); + aml_append(dev, field); + aml_append(sb_scope, dev); + } + aml_append(dsdt, sb_scope); build_hpet_aml(dsdt); @@ -1530,7 +1560,8 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, build_legacy_cpu_hotplug_aml(dsdt, machine, pm->cpu_hp_io_base); } else { CPUHotplugFeatures opts = { - .acpi_1_compatible = true, .has_legacy_cphp = true + .acpi_1_compatible = true, .has_legacy_cphp = true, + .smi_path = pm->smi_on_cpuhp ? "\\_SB.PCI0.SMI0.SMIC" : NULL, }; build_cpus_aml(dsdt, machine, opts, pm->cpu_hp_io_base, "\\_SB.PCI0", "\\_GPE._E02"); diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c index 83da7346ab..5ebea70a8d 100644 --- a/hw/isa/lpc_ich9.c +++ b/hw/isa/lpc_ich9.c @@ -643,6 +643,9 @@ static void ich9_lpc_initfn(Object *obj) &acpi_enable_cmd, OBJ_PROP_FLAG_READ); object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD, &acpi_disable_cmd, OBJ_PROP_FLAG_READ); + object_property_add_uint64_ptr(obj, "x-smi-negotiated-features", + &lpc->smi_negotiated_features, + OBJ_PROP_FLAG_READ); ich9_pm_add_properties(obj, &lpc->pm); }