From patchwork Wed Mar 30 18:14:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Verma, Vishal L" X-Patchwork-Id: 12796182 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD0BDC433FE for ; Wed, 30 Mar 2022 18:15:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349777AbiC3SQv (ORCPT ); Wed, 30 Mar 2022 14:16:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349920AbiC3SQh (ORCPT ); Wed, 30 Mar 2022 14:16:37 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71A36DF4C; Wed, 30 Mar 2022 11:14:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648664090; x=1680200090; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=CzkTDltQLY529JPckw9IyjtjINE/P9X9eKTMZyoIehw=; b=R0ayF46HMoEzWayR66GLZT3z+WXaM+0YWFXHD1et3d/mVqdjzM75YN4I 9/LhPp56pWtCchaPN/GJrdsQdzojiy1Jwsj4QlCVA+oOJpMRZDwOh+5Mq R4eXayKg0OiHBu8jQy0mZayjyhK2uwVAjpG5BbuK2go/+3BwwzBC5TPg9 4lHY3UpxwT6OVURGbUKNv+7/EH8G1Sid7WRaRIM7blWhrX1DBBclrdXgr ymjWgFLEP5I4ZrqY7lO1G3m9CXvwxfJFEhxk6Ou4DKuRbuPgdMuzqZZJp 2zQe0/tcA4Z0s1MlJ5+aCkGLx2/9g42CHmDHmRpMnSPbgbedjgin0AbtB Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10302"; a="241764486" X-IronPort-AV: E=Sophos;i="5.90,223,1643702400"; d="scan'208";a="241764486" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2022 11:14:50 -0700 X-IronPort-AV: E=Sophos;i="5.90,223,1643702400"; d="scan'208";a="653992024" Received: from sbathula-mobl.amr.corp.intel.com (HELO vverma7-desk1.intel.com) ([10.209.170.43]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2022 11:14:49 -0700 From: Vishal Verma To: Cc: , Jonathan Cameron , Dan Williams , "Rafael J. Wysocki" , Robert Moore , Bjorn Helgaas , Davidlohr Bueso , Vishal Verma Subject: [PATCH v3 0/3] acpi: add support for CXL _OSC Date: Wed, 30 Mar 2022 12:14:31 -0600 Message-Id: <20220330181434.1515791-1-vishal.l.verma@intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1624; h=from:subject; bh=CzkTDltQLY529JPckw9IyjtjINE/P9X9eKTMZyoIehw=; b=owGbwMvMwCXGf25diOft7jLG02pJDEku87gMu9aunOTVH/2ixXiS8nwbucavnunFJ2LNF5mIqbpH PlTtKGVhEONikBVTZPm75yPjMbnt+TyBCY4wc1iZQIYwcHEKwET2KDMydOZkng0L46w5dkTeZVNDkt t559x33LWS0ZaujKqNd02PMjJMNFRh/D/jR7KStssZW79TUj23DvzLqin+Vq92lk3nWy4DAA== X-Developer-Key: i=vishal.l.verma@intel.com; a=openpgp; fpr=F8682BE134C67A12332A2ED07AFA61BEA3B84DFF Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Changes since v2[1]: - Add a prep patch replacing pointer arithmetic with a helper (David) - Make is_pcie/is_cxl helpers inline (David) - Tidy up the if/else in the above helpers (David) Add support for using the CXL definition of _OSC where applicable, and negotiating CXL specific support and control bits. Patch 1 is a preliminary cleanup that replaces open-coded pointer arithmetic to retrieve the Control DWORD with an inline helper. Patch 2 adds the new CXL _OSC UUID, and uses it instead of the PCI UUID when a root port is CXL enabled. It provides a fallback method for CXL-1.1 platforms that may not implement the CXL-2.0 _OSC. Patch 3 performs negotiation for the CXL specific _OSC support and control bits. I've tested these against a custom qemu[2], which adds the CXL _OSC (in addition to other CXL support). Specifically, _OSC support is added here[3]. [1]: https://lore.kernel.org/linux-cxl/20220326002430.797244-1-vishal.l.verma@intel.com/ [2]: https://gitlab.com/jic23/qemu/-/tree/cxl-v8-draft [3]: https://gitlab.com/jic23/qemu/-/commit/1d67df6b6e3716c27462873f3451956f5c0673a3 Dan Williams (1): PCI/ACPI: Use CXL _OSC instead of PCIe _OSC Vishal Verma (2): acpi: add a helper for retrieving _OSC Control DWORDs acpi/pci_root: negotiate CXL _OSC include/linux/acpi.h | 44 ++++++++- include/acpi/acpi_bus.h | 12 ++- drivers/acpi/bus.c | 2 +- drivers/acpi/pci_root.c | 207 ++++++++++++++++++++++++++++++++++------ 4 files changed, 231 insertions(+), 34 deletions(-) base-commit: 05e815539f3f161585c13a9ab023341bade2c52f