From patchwork Fri Mar 27 12:11:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 1262768 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=Z0bwGD+M; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 48pghC30Zyz9sP7 for ; Fri, 27 Mar 2020 23:11:55 +1100 (AEDT) Received: from localhost ([::1]:41018 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jHnq5-0005Lv-Eo for incoming@patchwork.ozlabs.org; Fri, 27 Mar 2020 08:11:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35286) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jHnpc-0005Hd-NV for qemu-devel@nongnu.org; Fri, 27 Mar 2020 08:11:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jHnpb-0002Ej-Dc for qemu-devel@nongnu.org; Fri, 27 Mar 2020 08:11:24 -0400 Received: from us-smtp-delivery-74.mimecast.com ([63.128.21.74]:56540) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jHnpb-0002Cl-AE for qemu-devel@nongnu.org; Fri, 27 Mar 2020 08:11:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585311082; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iecBE+0B1PGZoq65FTFsNM1AMbDLLSz4/8wfLx6LjOs=; b=Z0bwGD+M4DOsbX8kQgRrTjg06qiB/kdmuy89gwoSQtkm1uzu2xh8NVixJZxGgy9hXwOEyO oGuc1ljo4I4MHToXtfYvnvN5IrwpHZw6eG4pwxHRKKIrUJgmWOgBTEqEejRBYqXtTgZj3r ZK+rVVO+Jf2zXS34+ff6xsR7h2MC8c4= 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-80-qIOTUP2fPRqVXEHceBeNQw-1; Fri, 27 Mar 2020 08:11:20 -0400 X-MC-Unique: qIOTUP2fPRqVXEHceBeNQw-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 BC3C1DBAB; Fri, 27 Mar 2020 12:11:19 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-112-49.ams2.redhat.com [10.36.112.49]) by smtp.corp.redhat.com (Postfix) with ESMTP id 492395E01D; Fri, 27 Mar 2020 12:11:19 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id EBA5B31E47; Fri, 27 Mar 2020 13:11:11 +0100 (CET) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH 5/6] acpi: serial: don't use _STA method Date: Fri, 27 Mar 2020 13:11:10 +0100 Message-Id: <20200327121111.1530-6-kraxel@redhat.com> In-Reply-To: <20200327121111.1530-1-kraxel@redhat.com> References: <20200327121111.1530-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 63.128.21.74 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: Eduardo Habkost , "Michael S. Tsirkin" , Gerd Hoffmann , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The _STA method dates back to the days where we had a static DSDT. The device is listed in the DSDT table unconditionally and the _STA method checks a bit in the isa bridge pci config space to figure whenever a given is isa device is present or not, then evaluates to 0x0f (present) or 0x00 (absent). These days the DSDT is generated by qemu anyway, so if a device is not present we can simply drop it from the DSDT instead. Signed-off-by: Gerd Hoffmann --- hw/i386/acpi-build-pc.c | 32 ++++++++------------------------ 1 file changed, 8 insertions(+), 24 deletions(-) diff --git a/hw/i386/acpi-build-pc.c b/hw/i386/acpi-build-pc.c index 18ca2fd46961..97af5eac3d79 100644 --- a/hw/i386/acpi-build-pc.c +++ b/hw/i386/acpi-build-pc.c @@ -1204,50 +1204,34 @@ static Aml *build_lpt_device_aml(void) return dev; } -static Aml *build_com_device_aml(uint8_t uid) +static void build_com_device_aml(Aml *scope, uint8_t uid) { Aml *dev; Aml *crs; - Aml *method; - Aml *if_ctx; - Aml *else_ctx; - Aml *zero = aml_int(0); - Aml *is_present = aml_local(0); - const char *enabled_field = "CAEN"; uint8_t irq = 4; uint16_t io_port = 0x03F8; assert(uid == 1 || uid == 2); if (uid == 2) { - enabled_field = "CBEN"; irq = 3; io_port = 0x02F8; } + if (!memory_region_present(get_system_io(), io_port)) { + return; + } dev = aml_device("COM%d", uid); aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0501"))); aml_append(dev, aml_name_decl("_UID", aml_int(uid))); - method = aml_method("_STA", 0, AML_NOTSERIALIZED); - aml_append(method, aml_store(aml_name("%s", enabled_field), is_present)); - if_ctx = aml_if(aml_equal(is_present, zero)); - { - aml_append(if_ctx, aml_return(aml_int(0x00))); - } - aml_append(method, if_ctx); - else_ctx = aml_else(); - { - aml_append(else_ctx, aml_return(aml_int(0x0f))); - } - aml_append(method, else_ctx); - aml_append(dev, method); + aml_append(dev, aml_name_decl("_STA", aml_int(0xf))); crs = aml_resource_template(); aml_append(crs, aml_io(AML_DECODE16, io_port, io_port, 0x00, 0x08)); aml_append(crs, aml_irq_no_flags(irq)); aml_append(dev, aml_name_decl("_CRS", crs)); - return dev; + aml_append(scope, dev); } static void build_isa_devices_aml(Aml *table) @@ -1265,8 +1249,8 @@ static void build_isa_devices_aml(Aml *table) aml_append(scope, build_fdc_device_aml(fdc)); } aml_append(scope, build_lpt_device_aml()); - aml_append(scope, build_com_device_aml(1)); - aml_append(scope, build_com_device_aml(2)); + build_com_device_aml(scope, 1); + build_com_device_aml(scope, 2); if (ambiguous) { error_report("Multiple ISA busses, unable to define IPMI ACPI data");