From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 6B641C433E0 for ; Tue, 16 Feb 2021 22:24:34 +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 D192464E10 for ; Tue, 16 Feb 2021 22:24:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D192464E10 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]:59750 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lC8lk-0007uG-Oy for qemu-devel@archiver.kernel.org; Tue, 16 Feb 2021 17:24:32 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:35174) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lC8kI-0006WV-3P for qemu-devel@nongnu.org; Tue, 16 Feb 2021 17:23:02 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:25692) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lC8kG-00028v-33 for qemu-devel@nongnu.org; Tue, 16 Feb 2021 17:23:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613514178; 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=sMRQieqJ9NUXuCL7S94QwJvbrIO6Cx9KjRomMknXKw4=; b=NbPyMxWKX2dOwZMzchKcWYR8Ae9QpV9XwpWCbyfJ+swochLMpmhinndEGPfnxqi2+X4qkV FWMdsODPNF7Di33jExPnbOnyttickGGc7UboHdRgn0qbYJR/elcTrrAqAiDfy6UbaLWmcp RoJnMvlYWwIhtRLKuzyUhDJy1gBZG2k= 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-124-wA1pzHnHP-OWJSGIy025nQ-1; Tue, 16 Feb 2021 17:22:55 -0500 X-MC-Unique: wA1pzHnHP-OWJSGIy025nQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E11CF195D561; Tue, 16 Feb 2021 22:22:53 +0000 (UTC) Received: from localhost (unknown [10.40.208.60]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2D13719D6C; Tue, 16 Feb 2021 22:22:48 +0000 (UTC) Date: Tue, 16 Feb 2021 23:22:47 +0100 From: Igor Mammedov To: isaku.yamahata@gmail.com Subject: Re: [PATCH v4 04/10] acpi/core: always set SCI_EN when SMM isn't supported Message-ID: <20210216232247.0812188d@redhat.com> In-Reply-To: References: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=imammedo@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=imammedo@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: isaku.yamahata@intel.com, qemu-devel@nongnu.org, mst@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Mon, 15 Feb 2021 17:04:09 -0800 isaku.yamahata@gmail.com wrote: > From: Isaku Yamahata > > If SMM is not supported, ACPI fixed hardware doesn't support > legacy-mode. ACPI-only platform. Where SCI_EN in PM1_CNT register is > always set. > The bit tells OS legacy mode(SCI_EN cleared) or ACPI mode(SCI_EN set). > > With the next patch (setting fadt.smi_cmd = 0 when smm isn't enabled), > guest Linux tries to switch to ACPI mode, finds smi_cmd = 0, and then > fails to initialize acpi subsystem. This patch proactively fixes it. > > This patch changes guest ABI. To keep compatibility, use > "x-smm-compat-5" introduced by earlier patch. > If the property is true, disable new behavior. > > ACPI spec 4.8.10.1 PM1 Event Grouping > PM1 Eanble Registers > > For ACPI-only platforms (where SCI_EN is always set) > > Signed-off-by: Isaku Yamahata Reviewed-by: Igor Mammedov > --- > hw/acpi/core.c | 11 ++++++++++- > hw/acpi/ich9.c | 2 +- > hw/acpi/piix4.c | 3 ++- > hw/isa/vt82c686.c | 2 +- > include/hw/acpi/acpi.h | 4 +++- > 5 files changed, 17 insertions(+), 5 deletions(-) > > diff --git a/hw/acpi/core.c b/hw/acpi/core.c > index 7170bff657..1e004d0078 100644 > --- a/hw/acpi/core.c > +++ b/hw/acpi/core.c > @@ -579,6 +579,10 @@ void acpi_pm1_cnt_update(ACPIREGS *ar, > bool sci_enable, bool sci_disable) > { > /* ACPI specs 3.0, 4.7.2.5 */ > + if (ar->pm1.cnt.acpi_only) { > + return; > + } > + > if (sci_enable) { > ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE; > } else if (sci_disable) { > @@ -608,11 +612,13 @@ static const MemoryRegionOps acpi_pm_cnt_ops = { > }; > > void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent, > - bool disable_s3, bool disable_s4, uint8_t s4_val) > + bool disable_s3, bool disable_s4, uint8_t s4_val, > + bool acpi_only) > { > FWCfgState *fw_cfg; > > ar->pm1.cnt.s4_val = s4_val; > + ar->pm1.cnt.acpi_only = acpi_only; > ar->wakeup.notify = acpi_notify_wakeup; > qemu_register_wakeup_notifier(&ar->wakeup); > > @@ -638,6 +644,9 @@ void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent, > void acpi_pm1_cnt_reset(ACPIREGS *ar) > { > ar->pm1.cnt.cnt = 0; > + if (ar->pm1.cnt.acpi_only) { > + ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE; > + } > } > > /* ACPI GPE */ > diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c > index 5ff4e01c36..853447cf9d 100644 > --- a/hw/acpi/ich9.c > +++ b/hw/acpi/ich9.c > @@ -282,7 +282,7 @@ void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm, > acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io); > acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io); > acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io, pm->disable_s3, pm->disable_s4, > - pm->s4_val); > + pm->s4_val, !pm->smm_compat && !smm_enabled); > > acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN); > memory_region_init_io(&pm->io_gpe, OBJECT(lpc_pci), &ich9_gpe_ops, pm, > diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c > index 30dd9b2309..1efc0ded9f 100644 > --- a/hw/acpi/piix4.c > +++ b/hw/acpi/piix4.c > @@ -497,7 +497,8 @@ static void piix4_pm_realize(PCIDevice *dev, Error **errp) > > acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io); > acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io); > - acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val); > + acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val, > + !s->smm_compat && !s->smm_enabled); > acpi_gpe_init(&s->ar, GPE_LEN); > > s->powerdown_notifier.notify = piix4_pm_powerdown_req; > diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c > index a6f5a0843d..071b64b497 100644 > --- a/hw/isa/vt82c686.c > +++ b/hw/isa/vt82c686.c > @@ -240,7 +240,7 @@ static void vt82c686b_pm_realize(PCIDevice *dev, Error **errp) > > acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io); > acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io); > - acpi_pm1_cnt_init(&s->ar, &s->io, false, false, 2); > + acpi_pm1_cnt_init(&s->ar, &s->io, false, false, 2, false); > } > > static Property via_pm_properties[] = { > diff --git a/include/hw/acpi/acpi.h b/include/hw/acpi/acpi.h > index 22b0b65bb2..9e8a76f2e2 100644 > --- a/include/hw/acpi/acpi.h > +++ b/include/hw/acpi/acpi.h > @@ -128,6 +128,7 @@ struct ACPIPM1CNT { > MemoryRegion io; > uint16_t cnt; > uint8_t s4_val; > + bool acpi_only; > }; > > struct ACPIGPE { > @@ -163,7 +164,8 @@ void acpi_pm1_evt_init(ACPIREGS *ar, acpi_update_sci_fn update_sci, > > /* PM1a_CNT: piix and ich9 don't implement PM1b CNT. */ > void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent, > - bool disable_s3, bool disable_s4, uint8_t s4_val); > + bool disable_s3, bool disable_s4, uint8_t s4_val, > + bool acpi_only); > void acpi_pm1_cnt_update(ACPIREGS *ar, > bool sci_enable, bool sci_disable); > void acpi_pm1_cnt_reset(ACPIREGS *ar);