From patchwork Fri Apr 3 08:04:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 11472057 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AAB9392C for ; Fri, 3 Apr 2020 08:13:05 +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 805B1206F8 for ; Fri, 3 Apr 2020 08:13:05 +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="P5/u6Oet" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 805B1206F8 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:51846 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jKHRo-00079H-K1 for patchwork-qemu-devel@patchwork.kernel.org; Fri, 03 Apr 2020 04:13:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42488) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jKHKR-0001C7-BE for qemu-devel@nongnu.org; Fri, 03 Apr 2020 04:05:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jKHKP-00084O-QW for qemu-devel@nongnu.org; Fri, 03 Apr 2020 04:05:27 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:27312 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jKHKP-00082P-LS for qemu-devel@nongnu.org; Fri, 03 Apr 2020 04:05:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585901125; 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=36a0gM6zDWJYaqRgRbMVQsFx61c7nsv103n4Pt2mH6k=; b=P5/u6Oet2c6/WV4MtIoNPDBmPFbd/qwvxwDnCjyavpJYRBjXRm0S3ycJcQ4h0E2Y3bdC2v BLU3rZpLasxoXz/j6OL0he+yuomOimyXr+/RfR3NCwhgoWdcYbTxxrxI2IrLi3eS/mQhCE Zjk2yF3QoEU/CtLStXoEkvNFcOaLWd0= 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-351-8BWE0HSKNwe5Z3FEconiiA-1; Fri, 03 Apr 2020 04:05:23 -0400 X-MC-Unique: 8BWE0HSKNwe5Z3FEconiiA-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 571D9DB62; Fri, 3 Apr 2020 08:05:22 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-113-60.ams2.redhat.com [10.36.113.60]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1C9561001B0B; Fri, 3 Apr 2020 08:05:13 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 1201B17510; Fri, 3 Apr 2020 10:05:03 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH v2 05/12] acpi: parallel: don't use _STA method Date: Fri, 3 Apr 2020 10:04:55 +0200 Message-Id: <20200403080502.8154-6-kraxel@redhat.com> In-Reply-To: <20200403080502.8154-1-kraxel@redhat.com> References: <20200403080502.8154-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 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] [fuzzy] X-Received-From: 207.211.31.81 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: Kevin Wolf , Eduardo Habkost , qemu-block@nongnu.org, "Michael S. Tsirkin" , Max Reitz , Paolo Bonzini , Gerd Hoffmann , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Igor Mammedov , John Snow , Richard Henderson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.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 Reviewed-by: Igor Mammedov --- hw/i386/acpi-build.c | 29 ++++++++--------------------- 1 file changed, 8 insertions(+), 21 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 08433a06039f..5d2b9b099684 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -1183,39 +1183,26 @@ 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)) { + 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) @@ -1262,7 +1249,7 @@ 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);