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=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS 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 1B348C43331 for ; Fri, 27 Mar 2020 14:36:39 +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 DAF05206F2 for ; Fri, 27 Mar 2020 14:36:38 +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="R2t7Pfbc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DAF05206F2 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]:42536 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jHq6A-00025Z-4d for qemu-devel@archiver.kernel.org; Fri, 27 Mar 2020 10:36:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37821) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jHq5K-0001L1-9q for qemu-devel@nongnu.org; Fri, 27 Mar 2020 10:35:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jHq5I-0006aK-U7 for qemu-devel@nongnu.org; Fri, 27 Mar 2020 10:35:46 -0400 Received: from us-smtp-delivery-74.mimecast.com ([63.128.21.74]:28253) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jHq5I-0006Yc-Oz for qemu-devel@nongnu.org; Fri, 27 Mar 2020 10:35:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585319744; 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=SpJVvIRAWqF+pe/qwRYbEUr6Biz8HFPFMdPJ5p1Tgo4=; b=R2t7Pfbcd6zwSL1E73PPtXTS1qW5upzOb626pQm0deC1JsSlizd2sWzetGO4T9/Rr4iVV3 m/tCTsRgCuJqwvb8hhaX9A+xdOsCBLM9or8YttgJoAahEfVvhzPxFx+ZzlnWrllgHDsiAv 0ugEWr7BcW7LCvGO9yG56JBW8pvo6IQ= 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-464-tAPWfe7oPF-8IuKuPE-kKQ-1; Fri, 27 Mar 2020 10:35:42 -0400 X-MC-Unique: tAPWfe7oPF-8IuKuPE-kKQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A6B421937FC0; Fri, 27 Mar 2020 14:35:41 +0000 (UTC) Received: from localhost (unknown [10.40.208.76]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8B88E1001920; Fri, 27 Mar 2020 14:35:33 +0000 (UTC) Date: Fri, 27 Mar 2020 15:35:31 +0100 From: Igor Mammedov To: Gerd Hoffmann Subject: Re: [PATCH 6/6] acpi: parallel: don't use _STA method Message-ID: <20200327153531.0e5a19d2@redhat.com> In-Reply-To: <20200327121111.1530-7-kraxel@redhat.com> References: <20200327121111.1530-1-kraxel@redhat.com> <20200327121111.1530-7-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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: Paolo Bonzini , Richard Henderson , "Michael S. Tsirkin" , qemu-devel@nongnu.org, Eduardo Habkost Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, 27 Mar 2020 13:11:11 +0100 Gerd Hoffmann wrote: > 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 | 29 ++++++++--------------------- > 1 file changed, 8 insertions(+), 21 deletions(-) > > diff --git a/hw/i386/acpi-build-pc.c b/hw/i386/acpi-build-pc.c > index 97af5eac3d79..8bab105d5e44 100644 > --- a/hw/i386/acpi-build-pc.c > +++ b/hw/i386/acpi-build-pc.c > @@ -1169,39 +1169,26 @@ static Aml *build_mouse_device_aml(void) > return dev; > } > > -static Aml *build_lpt_device_aml(void) > +static void build_lpt_device_aml(Aml *scope) > { > Aml *dev; > Aml *crs; > - Aml *method; > - Aml *if_ctx; > - Aml *else_ctx; > - Aml *zero = aml_int(0); > - Aml *is_present = aml_local(0); > + > + if (!memory_region_present(get_system_io(), 0x0378)) { same comment as in 5/6 applies here > + return; > + } > > dev = aml_device("LPT"); > aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0400"))); > > - method = aml_method("_STA", 0, AML_NOTSERIALIZED); > - aml_append(method, aml_store(aml_name("LPEN"), 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, 0x0378, 0x0378, 0x08, 0x08)); > aml_append(crs, aml_irq_no_flags(7)); > aml_append(dev, aml_name_decl("_CRS", crs)); > > - return dev; > + aml_append(scope, dev); > } > > static void build_com_device_aml(Aml *scope, uint8_t uid) > @@ -1248,7 +1235,7 @@ static void build_isa_devices_aml(Aml *table) > if (fdc) { > aml_append(scope, build_fdc_device_aml(fdc)); > } > - aml_append(scope, build_lpt_device_aml()); > + build_lpt_device_aml(scope); > build_com_device_aml(scope, 1); > build_com_device_aml(scope, 2); >