From patchwork Wed Feb 7 17:19:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13548765 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B96C07A70E; Wed, 7 Feb 2024 17:21:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707326461; cv=none; b=FNn1JvCT/34mOcA1DBszkQRgLV4quT0jv8kK4BnPXdMyN8ILpyroTjYYUSeSMIMuEp1jdGBjns/KBee5fAVUQKkOkUxVHt01j6y5bddp2QIlZIPIINNEjW43OGsLhuXqPrKd0vICtxqFpEPCqtJg789eCSbDA0p7zh+Y7A1yHxg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707326461; c=relaxed/simple; bh=zHTUM0POKygwNCz2lNY2hdNAaXPntv6CZOGi3PYOiUA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=qlOmtOpgChCPSNJKfHIs9tCyLXXuXbJsAprD9EAhEefRiC1nZ7y5CNsMrpihV7QpN2srjpJqgnM348RoskTJ4VoihNXhsH9mVpAX0lZ5gZibF70OqIebnv/Wjmspz0CjkxCnAvaHs1supPzLHUdn1L3Dmne5pu3kYFjcEWqMv3U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0BDABC433F1; Wed, 7 Feb 2024 17:21:00 +0000 (UTC) From: Dave Jiang To: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev Cc: vishal.l.verma@intel.com Subject: [NDCTL PATCH v6 0/4] ndctl: Add support of qos_class for CXL CLI Date: Wed, 7 Feb 2024 10:19:35 -0700 Message-ID: <20240207172055.1882900-1-dave.jiang@intel.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Vishal, With the QoS class series merged to the v6.8 kernel, can you please review and apply this series to ndctl if acceptable? v6: - Check return value of create_region_validate_qos_class() (Wonjae) v5: - split out test from cxl-topology.sh (Vishal) v4: - Update against changes in kernel from multi to single qos_class entry - Add test in cxl-topology.sh (Dan) - See individual patch log for details v3: - Rebase against latest ndctl/pending branch. The series adds support for the kernel enabling of QoS class in the v6.8 kernel. The kernel exports a qos_class token for the root decoders (CFMWS) and as well as for the CXL memory devices. The qos_class exported for a device is calculated by the driver during device probe. Currently a qos_class is exported for the volatile partition (ram) and another for the persistent partition (pmem). In the future qos_class will be exported for DCD regions. Display of qos_class is through the CXL CLI list command with -vvv for extra verbose. A qos_class check as also been added for region creation. A warning is emitted when the qos_class of a memory range of a CXL memory device being included in the CXL region assembly does not match the qos_class of the root decoder. Options are available to suppress the warning or to fail the region creation. This enabling provides a guidance on flagging memory ranges being used is not optimal for performance for the CXL region to be formed.