From owner-svn-src-all@freebsd.org Sat Jul 28 23:34:17 2018 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D4A7510618E6; Sat, 28 Jul 2018 23:34:16 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 48E8385B51; Sat, 28 Jul 2018 23:34:16 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id w6SNY5ba055635 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sun, 29 Jul 2018 02:34:08 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua w6SNY5ba055635 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id w6SNY5gd055634; Sun, 29 Jul 2018 02:34:05 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Sun, 29 Jul 2018 02:34:05 +0300 From: Konstantin Belousov To: Eitan Adler Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: Re: svn commit: r336805 - in stable/11: share/man/man4 sys/dev/vt/hw/vga Message-ID: <20180728233405.GD40119@kib.kiev.ua> References: <201807280737.w6S7b12F025452@repo.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201807280737.w6S7b12F025452@repo.freebsd.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on tom.home X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Jul 2018 23:34:17 -0000 On Sat, Jul 28, 2018 at 07:37:01AM +0000, Eitan Adler wrote: > Author: eadler > Date: Sat Jul 28 07:37:01 2018 > New Revision: 336805 > URL: https://svnweb.freebsd.org/changeset/base/336805 > > Log: > MFC r335629: > > vt: add option to ignore NO_VGA flag in ACPI > > To workaround buggy firmware that sets this flag when there's actually > a VGA present. > > Ref D16003 > PR: 229235 > > Modified: > stable/11/share/man/man4/vt.4 > stable/11/sys/dev/vt/hw/vga/vt_vga.c > Directory Properties: > stable/11/ (props changed) > > Modified: stable/11/share/man/man4/vt.4 > ============================================================================== > --- stable/11/share/man/man4/vt.4 Sat Jul 28 06:46:10 2018 (r336804) > +++ stable/11/share/man/man4/vt.4 Sat Jul 28 07:37:01 2018 (r336805) > @@ -44,6 +44,7 @@ > In > .Xr loader.conf 5 : > .Cd hw.vga.textmode=1 > +.Cd hw.vga.acpi_ignore_no_vga=1 > .Cd kern.vty=vt > .Cd kern.vt.color..rgb="" > .Cd kern.vt.fb.default_mode="x" > @@ -196,6 +197,10 @@ prompt or in > Set to 1 to use virtual terminals in text mode instead of graphics mode. > Features that require graphics mode, like loadable fonts, will be > disabled. > +.It Va hw.vga.acpi_ignore_no_vga > +Set to 1 to force the usage of the VGA driver regardless of whether > +ACPI IAPC_BOOT_ARCH signals no VGA support. > +Can be used to workaround firmware bugs in the ACPI tables. > .It Va kern.vty > Set this value to > .Ql vt > > Modified: stable/11/sys/dev/vt/hw/vga/vt_vga.c > ============================================================================== > --- stable/11/sys/dev/vt/hw/vga/vt_vga.c Sat Jul 28 06:46:10 2018 (r336804) > +++ stable/11/sys/dev/vt/hw/vga/vt_vga.c Sat Jul 28 07:37:01 2018 (r336805) > @@ -1211,6 +1211,12 @@ vga_acpi_disabled(void) > ACPI_TABLE_FADT *fadt; > vm_paddr_t physaddr; > uint16_t flags; > + int ignore; > + > + TUNABLE_INT_FETCH("hw.vga.acpi_ignore_no_vga", &ignore); > + > + if (ignore) > + return (false); If the tunable is not set, this code evaluates the stack garbage. Why did you merged this without asking the author and not looking at the followups ? > > physaddr = acpi_find_table(ACPI_SIG_FADT); > if (physaddr == 0)