From owner-freebsd-questions@freebsd.org Wed Dec 4 13:45:26 2019 Return-Path: Delivered-To: freebsd-questions@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 216AD1BC6DA for ; Wed, 4 Dec 2019 13:45:26 +0000 (UTC) (envelope-from ml@netfence.it) Received: from soth.netfence.it (net-2-44-121-52.cust.vodafonedsl.it [2.44.121.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mailserver.netfence.it", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47Sg8j01yPz3MGQ for ; Wed, 4 Dec 2019 13:45:24 +0000 (UTC) (envelope-from ml@netfence.it) Received: from alamar.ventu (alamar.local.netfence.it [10.1.2.18]) (authenticated bits=0) by soth.netfence.it (8.15.2/8.15.2) with ESMTPSA id xB4DjDZL010083 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO) for ; Wed, 4 Dec 2019 14:45:16 +0100 (CET) (envelope-from ml@netfence.it) X-Authentication-Warning: soth.netfence.it: Host alamar.local.netfence.it [10.1.2.18] claimed to be alamar.ventu From: Andrea Venturoli Subject: To RETpoline or not to RETpoline To: freebsd-questions@freebsd.org Message-ID: Date: Wed, 4 Dec 2019 14:45:13 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 47Sg8j01yPz3MGQ X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=pass (policy=none) header.from=netfence.it; spf=pass (mx1.freebsd.org: domain of ml@netfence.it designates 2.44.121.52 as permitted sender) smtp.mailfrom=ml@netfence.it X-Spamd-Result: default: False [-4.10 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:2.44.121.52]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; HAS_XAW(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TO_DN_NONE(0.00)[]; DMARC_POLICY_ALLOW(-0.50)[netfence.it,none]; IP_SCORE(-1.30)[ip: (-6.93), ipnet: 2.44.0.0/16(-3.46), asn: 30722(3.85), country: IT(0.04)]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:30722, ipnet:2.44.0.0/16, country:IT]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Dec 2019 13:45:26 -0000 Hello. In a few days I'll be upgrading an 11.3/amd64 installation to 12.1 via sources. While 11.3 had the WITH_KERNEL_RETPOLINE macro, 12.0 also adds WITH_RETPOLINE (for userland). AFAICT these are not enabled by default. Should I use them? Are they experimental or ready for production use? Must they be used together? Is there something similar for ports and/or Poudriere? If any/all of the above are set, is there still any point in keeping hw.ibrs_disable=0? Other things I've missed? bye & Thanks av.