From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp12.migadu.com ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms5.migadu.com with LMTPS id +PgkF7YxQmOaLQAAbAwnHQ (envelope-from ) for ; Sun, 09 Oct 2022 04:28:06 +0200 Received: from aspmx1.migadu.com ([2001:41d0:8:6d80::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp12.migadu.com with LMTPS id gIklF7YxQmM40AAAauVa8A (envelope-from ) for ; Sun, 09 Oct 2022 04:28:06 +0200 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 aspmx1.migadu.com (Postfix) with ESMTPS id 405301C249 for ; Sun, 9 Oct 2022 04:28:06 +0200 (CEST) Received: from localhost ([::1]:57860 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ohM2v-0005S4-Ds for larch@yhetil.org; Sat, 08 Oct 2022 22:28:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:32858) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ohM2d-0005Rv-Pw for guix-devel@gnu.org; Sat, 08 Oct 2022 22:27:50 -0400 Received: from linode.us-core.com ([2600:3c01::f03c:93ff:fe26:6229]:46322) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ohM2b-0006SR-4D for guix-devel@gnu.org; Sat, 08 Oct 2022 22:27:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; s=2017; bh=+MXzsMJYj1QEKhe fjsdQe6x5calCA/gbMLM1Cm/j+xE=; h=to:subject:date:from:in-reply-to: references; d=lease-up.com; b=nG0PF0VU2KTm5r7vrf9JEefzv+nmXyM/NGIiUJij uPcUndMy9SLqWI3xIunaLtnywN9usNhrUhLtmshVy2MjMHGkX5zzihJBJmgUIruSCytfUo TfmUtaXCTMJtsyh5zJgmpRudJkqzGtdwP4rYqQ88yjVIjoLUvqwBTB3rleQ3E= Received: by linode.us-core.com (OpenSMTPD) with ESMTPSA id 21306186 (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO) for ; Sun, 9 Oct 2022 02:27:40 +0000 (UTC) Received: by mail-lj1-f176.google.com with SMTP id a12so9761013ljr.7 for ; Sat, 08 Oct 2022 19:27:39 -0700 (PDT) X-Gm-Message-State: ACrzQf0xFqd2SdVz3/WtKjVzXuhrVC1p7D0HLKYYwwfzbNSPEa+HHlja ealgIFoEcMvoxcZjpwCaiqtsjffoeX/a2TyCUxM= X-Google-Smtp-Source: AMsMyM6VlVwM3e5W+8P74f6L05D6MWqMt11RNXE7JAm2lOExhUMw4TgYmxIRwP++XNodCpVfyi8H/gqZrXruRBQVi2M= X-Received: by 2002:a2e:a909:0:b0:26e:47e:9408 with SMTP id j9-20020a2ea909000000b0026e047e9408mr4228031ljq.225.1665282456187; Sat, 08 Oct 2022 19:27:36 -0700 (PDT) MIME-Version: 1.0 References: <20221009001742.153f936c@aria> <6c9dd8f3a1d10bafb9c247e52cfe3a68@dismail.de> In-Reply-To: <6c9dd8f3a1d10bafb9c247e52cfe3a68@dismail.de> Date: Sat, 8 Oct 2022 19:26:59 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: Why linux-libre-bpf? To: guix-devel@gnu.org Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2600:3c01::f03c:93ff:fe26:6229; envelope-from=felix.lechner@lease-up.com; helo=linode.us-core.com X-Spam_score_int: 16 X-Spam_score: 1.6 X-Spam_bar: + X-Spam_report: (1.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_SBL_CSS=3.335, RCVD_IN_XBL=0.375, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" Reply-to: Felix Lechner From: Felix Lechner via "Development of GNU Guix and the GNU System distribution." X-Migadu-Flow: FLOW_IN X-Migadu-Country: US ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1665282486; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:dkim-signature; bh=+MXzsMJYj1QEKhefjsdQe6x5calCA/gbMLM1Cm/j+xE=; b=CO9uEhc7pfGtPK0DDpUdMQJJMIc6hqCht86WTIf7OkhU3IGA+dGdAF1prHYMN1GNZZdVAv RZ1Z7VwuFbe4Zy9nuPC7FQPn5p4nQJsYV6GwYS3GJQGihwhN6apSfuR5QvpGe8BUy3wlh0 02ftQyCNyDqtV471Q1n49k1QreABu8HBqfmxgGObFcpWs2KjwmxCoiTM3wCPZBZr6SdsIK qEiwMVu2ffPhUfTbD/Ko3aT5+1Xn0zTFp7lmTjM+UVJeiE0czWiz5bMAEzjnVjvD7T32RT 7h5KnDhShTHKLX/61pQEbh6RkCXBVjUklSk8IYLkShHS3pnVST3xbsx989QG5A== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1665282486; a=rsa-sha256; cv=none; b=KBLXyqPRxpYBf2lCq9dH5JhpUrVw4ltu6ij65bKaI22ttNC9Z2TaXBMEfNRzlBMHkTtrQg xT7ditxp//+8gqVxS0NV0YfyhA9MZQzENqo529nmUZHcy4SvKF0Z9UYX6IgsZ/ZsLkeH7O 0GNWPWUmYsbhA9DLkiICVqIFfUZCIriRunnhbXaDU5UC/D9p4HMsGpqpqWcGZMMVx72yJF 4rMWSe5awYQV/iUjJ4LqMrdKW575SPzB9Wnpo4UGCJoPh5fH1F8YUDHN7UDG37FrpOpE3E ZkT0nTjNSZsEEKUuN3eLOAlXo505xNF1lnRp3cYjCJucu974up7MXicpmd4fOg== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=lease-up.com header.s=2017 header.b=nG0PF0VU; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: 3.81 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=lease-up.com header.s=2017 header.b=nG0PF0VU; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: 405301C249 X-Spam-Score: 3.81 X-Migadu-Scanner: scn0.migadu.com X-TUID: MTltCllEduA1 Hi my fellow Guix, On Sat, Oct 8, 2022 at 5:32 PM wrote: > > > CONFIG_BPF_JIT_ALWAYS_ON=y > > CONFIG_BPF_JIT=y > > > > Why is this not the default in regular linux-libre? Maybe it's historical. I believe JIT used to open a side-channel for the Spectre attack. [1] Kind regards Felix Lechner [1] https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html