From owner-freebsd-hackers@freebsd.org Tue Aug 4 10:21:24 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D72943B714F for ; Tue, 4 Aug 2020 10:21:24 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:c2c:26d8::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BLW4g6d1fz4BJt for ; Tue, 4 Aug 2020 10:21:23 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id 074AL08T000702 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 4 Aug 2020 10:21:01 GMT (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: ottavio2006-usenet2012@yahoo.com Received: from [10.58.0.10] (dadvw [10.58.0.10]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id 074A0A3h072405 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Tue, 4 Aug 2020 17:00:10 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: [xpost,repost] VGA false positive in dmesg? To: Ottavio Caruso , freebsd-hackers@freebsd.org References: From: Eugene Grosbein Message-ID: Date: Tue, 4 Aug 2020 17:00:03 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.2 required=5.0 tests=BAYES_00,LOCAL_FROM, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.0 SPF_PASS SPF: sender matches SPF record * 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record * 2.6 LOCAL_FROM From my domains * -1.5 NICE_REPLY_A Looks like a legit reply (A) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: 4BLW4g6d1fz4BJt X-Spamd-Bar: + Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=permerror (mx1.freebsd.org: domain of eugen@grosbein.net uses mechanism not recognized by this client) smtp.mailfrom=eugen@grosbein.net X-Spamd-Result: default: False [1.46 / 15.00]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_SPAM_SHORT(0.14)[0.136]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grosbein.net]; NEURAL_SPAM_MEDIUM(0.10)[0.096]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; R_SPF_PERMFAIL(0.00)[empty SPF record]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_SPAM_LONG(0.33)[0.329]; FREEMAIL_TO(0.00)[yahoo.com,freebsd.org]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; SUBJECT_ENDS_QUESTION(1.00)[]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Aug 2020 10:21:24 -0000 04.08.2020 15:08, Ottavio Caruso via freebsd-hackers wrote: > Hi, > > [originally mailed to freebsd-questions, but I didn't get any feedback over there] > > I've launched a FreeBSD 12.1 instance in qemu (pay attention to "-vga > none"). Host is Linux: > > qemu-system-x86_64 \ > -drive if=virtio,file=/home/oc/VM/img/freebsd.image,index=0,media=disk \ > -M q35,accel=kvm -m 250M -cpu host -smp $(nproc) \ > -nic user,hostfwd=tcp:127.0.0.1:5554-:22,model=virtio-net-pci \ > -daemonize -display none -vga none \ > -serial mon:telnet:127.0.0.1:6664,server,nowait \ > > In the guest: > > oc@FreeBSD:~ % pciconf -vl > hostb0@pci0:0:0:0: class=0x060000 card=0x11001af4 chip=0x29c08086 > rev=0x00 hdr=0x00 > vendor = 'Intel Corporation' > device = '82G33/G31/P35/P31 Express DRAM Controller' > class = bridge > subclass = HOST-PCI > virtio_pci0@pci0:0:1:0: class=0x020000 card=0x00011af4 chip=0x10001af4 > rev=0x00 hdr=0x00 > vendor = 'Red Hat, Inc.' > device = 'Virtio network device' > class = network > subclass = ethernet > virtio_pci1@pci0:0:2:0: class=0x010000 card=0x00021af4 chip=0x10011af4 > rev=0x00 hdr=0x00 > vendor = 'Red Hat, Inc.' > device = 'Virtio block device' > class = mass storage > subclass = SCSI > virtio_pci2@pci0:0:3:0: class=0x010000 card=0x00021af4 chip=0x10011af4 > rev=0x00 hdr=0x00 > vendor = 'Red Hat, Inc.' > device = 'Virtio block device' > class = mass storage > subclass = SCSI > isab0@pci0:0:31:0: class=0x060100 card=0x11001af4 chip=0x29188086 > rev=0x02 hdr=0x00 > vendor = 'Intel Corporation' > device = '82801IB (ICH9) LPC Interface Controller' > class = bridge > subclass = PCI-ISA > ahci0@pci0:0:31:2: class=0x010601 card=0x11001af4 chip=0x29228086 > rev=0x02 hdr=0x00 > vendor = 'Intel Corporation' > device = '82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller > [AHCI mode]' > class = mass storage > subclass = SATA > none0@pci0:0:31:3: class=0x0c0500 card=0x11001af4 chip=0x29308086 > rev=0x02 hdr=0x00 > vendor = 'Intel Corporation' > device = '82801I (ICH9 Family) SMBus Controller' > class = serial bus > subclass = SMBus > > However, in dmesg: > > oc@FreeBSD:~ % dmesg | grep -i vga > VT(vga): text 80x25 > vtvga0: on motherboard > vga0: at port 0x3b0-0x3bb iomem 0xb0000-0xb7fff > pnpid PNP0900 on isa0 > > I don't know how to interpret this output. pciconf deals with PCI/PCI-E only but your guest detects ISA VGA device. Compare with real VGA hardware: VT(vga): resolution 640x480 vtvga0: on motherboard vgapci0: port 0xb000-0xb0ff mem 0xd0000000-0xdfffffff,0xfc3f0000-0xfc3fffff,0xfc200000-0xfc2fffff irq 18 at device 5.0 on pci1 vgapci0: Boot video device > I don't think it's a qemu issue, because I've done the same with NetBSD and OpenBSD guests and > there's no trace of vga in their dmesg. Maybe your guest has hw.vga.acpi_ignore_no_vga=1 in the kernel environment or some other non-default "hw.vga" knobs, check it out with kenv(1). You can also try adding to /boot/loader.conf: hint.vtvga.0.disabled=1 As for NetBSD/OpenBSD, they could drop ISA PNP VGA support or qemu settings differ for them.