From owner-freebsd-current@freebsd.org Fri Jan 18 18:15:13 2019 Return-Path: Delivered-To: freebsd-current@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 4E01E14A6920 for ; Fri, 18 Jan 2019 18:15:13 +0000 (UTC) (envelope-from tsoome@me.com) Received: from pv50p00im-zteg10011401.me.com (pv50p00im-zteg10011401.me.com [17.58.6.41]) (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 AD54D6C444 for ; Fri, 18 Jan 2019 18:15:03 +0000 (UTC) (envelope-from tsoome@me.com) Received: from nazgul.lan (148-52-235-80.sta.estpak.ee [80.235.52.148]) by pv50p00im-zteg10011401.me.com (Postfix) with ESMTPSA id 1EB259001E0 for ; Fri, 18 Jan 2019 18:14:53 +0000 (UTC) From: Toomas Soome Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) Subject: Re: GPT boot has less features than legacy MBR-based one (Was: UEFI, loader.efi and /boot.config) Date: Fri, 18 Jan 2019 20:14:51 +0200 References: To: FreeBSD Current In-Reply-To: Message-Id: <8DDD8F7A-40CA-48BB-9F71-56733100AFE0@me.com> X-Mailer: Apple Mail (2.3445.102.3) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-01-18_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1901180131 X-Rspamd-Queue-Id: AD54D6C444 X-Spamd-Bar: ----- X-Spamd-Result: default: False [-5.46 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; RBL_COMPOSITE_RCVD_IN_DNSWL_MED_DWL_DNSWL_LOW(0.00)[]; FREEMAIL_FROM(0.00)[me.com]; R_SPF_ALLOW(-0.20)[+ip4:17.58.0.0/16]; MV_CASE(0.50)[]; RCVD_DKIM_ARC_DNSWL_MED(-0.50)[]; 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R_DKIM_ALLOW(-0.20)[me.com:s=04042017]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_LOW(0.00)[me.com.dwl.dnswl.org : 127.0.5.1]; IP_SCORE(-1.29)[ip: (-3.54), ipnet: 17.58.0.0/20(-1.48), asn: 714(-1.36), country: US(-0.08)]; NEURAL_HAM_SHORT(-0.96)[-0.963,0]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Jan 2019 18:15:13 -0000 > On 18 Jan 2019, at 19:57, Lev Serebryakov wrote: >=20 > On 18.01.2019 20:13, Warner Losh wrote: >=20 >>> Also, there are same problems with GPT/BIOS setup (which uses GPT = but >>> legacy boot) :-( >>>=20 >>=20 >> What same problems? I don't think we've touched how gptboot has = handed off >> to /boot/loader in a long, long time. It there's an issue here, it's = a >> different issue. > Ok, strictly speaking it is different issue with same "high-level" > description: pmbr/gptboot has less features than simplest oldest = boot0. >=20 > pmbr/gptbood doesn't have any way to select partition to boot from, as > "boot0" has. No, setting "nextboot" from live system is not a = solution. > I speak about NanoBSD situation when there is tow partitions, both > bootable, one marked as "active" ("bootme" on GPT parlance) but it is > completely broken and user need to boot from other one form very > beginning. This task is trivially solved by "boot0" in pure-MBR case. > What about GPT/Legacy and GPT/UEFI? >=20 > --=20 > // Lev Serebryakov >=20 errm.. you press a key and enter device and or loader path. if it is not = working - the code is there to be fixed. GPT does not have the concept = of active partition. My suggestion would be to walk all those boot programs and document = them, then see what features are possible to bring to sync. rgds, toomas