From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 06 Jun 2025 09:35:53 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uNRcH-004IrZ-0b for lore@lore.pengutronix.de; Fri, 06 Jun 2025 09:35:53 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uNRcG-0005VG-L3 for lore@pengutronix.de; Fri, 06 Jun 2025 09:35:53 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=A1+2RHYnk/+7RMUSm8jH8Xb6gXUMbp4lEIrOvbOYomQ=; b=es4KD18Q0Drb11/W7+PfPpFkvH /hTW7mzCfsHbL9XGQRbo98qdzL/geZJMWz2NXCWvBWGY7RctOAz/hIVn0j6NjfDbSifIOPEbt5xjs JkWQmps+zn+RET8QRukZtBilggzFlUByOEMBrwf5RSwSwwwZ7+10Tad9BYFWrui5vRphLz+PvqOKn EMDAhNOko6uMQ9YqwCf+uGjfLqGJWXzaNP54hTpNj1EFBNzILs5aVHqkjAe2aoK/GajjeQ9us6iZP 7R/WtIOGlc6PBAjjkQ6JWDtPeuuOm7K/CY/B7nnMMehAry8+fzVrNpWuk+iRsDU79dvT2GCfbEjLr qs8Cna9A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uNRbl-0000000HJdN-3RWP; Fri, 06 Jun 2025 07:35:21 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uNRYO-0000000HJKh-2xb3 for barebox@lists.infradead.org; Fri, 06 Jun 2025 07:31:54 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=geraet.fritz.box) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1uNRYN-00037X-3f; Fri, 06 Jun 2025 09:31:51 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Adrian Negreanu Date: Fri, 6 Jun 2025 09:29:35 +0200 Message-Id: <20250606072939.2082971-1-a.fatoum@barebox.org> X-Mailer: git-send-email 2.39.5 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250606_003152_749712_2DACD001 X-CRM114-Status: GOOD ( 10.33 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.7 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v2 0/4] firmware: qemu_fw_cfg: implement file system X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) The character device we currently have is cumbersome to use. The Linux way to access it at /sys/firmware/qemu_fw_cfg is much nicer to use, so this series adds support for a similar FS to barebox. A very nice result of having file system access to the QEMU variables in barebox is that we get a trivial way to pass data to barebox. To make it even more convenient to use, this series enables overriding individual files in the environment via the new mechanism, e.g.: pytest --env nv/boot.default=fit --env boot/fit=@boot.sh v1 -> v2: - drop already upstream patches - drop truncate (Sascha) - make writing files besides "raw" an error (Sascha) - mount file system unconditionally, so environment can be read from it Ahmad Fatoum (4): fs: add qemu_fw_cfg file system firmware: qemu_fw_cfg: register at device initcall level video: ramfb: use new qemu fw_cfg FS fs: qemu_fw_cfg: support populating environment via QEMU fw_cfg conftest.py | 22 ++ defaultenv/defaultenv.c | 22 ++ drivers/firmware/qemu_fw_cfg.c | 2 +- drivers/video/Kconfig | 2 +- drivers/video/ramfb.c | 98 ++------ fs/Kconfig | 7 + fs/Makefile | 1 + fs/qemu_fw_cfg.c | 446 +++++++++++++++++++++++++++++++++ include/envfs.h | 5 + include/string.h | 5 + 10 files changed, 525 insertions(+), 85 deletions(-) create mode 100644 fs/qemu_fw_cfg.c -- 2.39.5