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Wed, 8 May 2024 10:41:42 -0700 From: Vidya Sagar To: , , , , , , , CC: , , , , , , , , , , Subject: [PATCH V7 0/4] PCI: Add support for preserving boot configuration Date: Wed, 8 May 2024 23:11:34 +0530 Message-ID: <20240508174138.3630283-1-vidyas@nvidia.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000066E7:EE_|MW4PR12MB6681:EE_ X-MS-Office365-Filtering-Correlation-Id: 30344116-f510-45de-90d2-08dc6f862e12 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|376005|36860700004|7416005|1800799015|82310400017; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?sbhMhLEAwLZsvlhH8UPOvpWz0gW0WYJGgdPZU6MOUolMPBe2GViHlTH39hFz?= =?us-ascii?Q?5ab2+/TO6oQxBUFNUeFzotdSUBf3K4Ai6CIaX86HEEaOsb1Ae0bCGCN3JxIm?= =?us-ascii?Q?tizayIGaFrgjdgZ8GuDVZuCv4BtRDUzKiSMv5miCLgW7Xrmsp3fPkQRtwVgc?= =?us-ascii?Q?Swa6x0XSwJw/dM9/Yc21vkCiA8mJn0u25kMtbMPqtiWJnJO6+8KWarOKi+2y?= =?us-ascii?Q?ibPkptbgSE7TMm2yFUYHOkHb/OjwCr20Vul3c2x15ANMZc5f//gq1hctymmp?= =?us-ascii?Q?pQuxdBWlV4BNht9GGDjVt+TLFuQasdnxNVLiy9ApEOuDY2XjPjT5gIhVq7TH?= =?us-ascii?Q?ri+p3qmJD1VXWeGtc+SDMhU96zF2RQnqa59LBV1mzmIutcD2pljMvmh9a9gf?= =?us-ascii?Q?BpeIBPVsYDQTGQlqUK4LCfe5nWNcxttmv7I9bRms4jjV2ADqfE50kVQXEExO?= =?us-ascii?Q?+ayjk3rjsgojV7mWWCO3HDJCKX7+yq+WeRPpAiZQLwog3QHLsvdu34iEI3GH?= =?us-ascii?Q?cBw9FnTrAzyHrw89Ucn3SB2ceXZcyklWNyJU8OwoeUK5oz5EmM+z+OGn9Rm8?= =?us-ascii?Q?DRkfKThxmD0/sj8wmhbPXbJIen+6qP74A8PFmGmIRYG2DEY5KaW/CuMaFR7I?= =?us-ascii?Q?l1d2nrQF7RCN2tuOFQMDziWSWzPFs3flJZD2lcqVtcdleDlPFWo3tRglAjvL?= =?us-ascii?Q?kloq1fJ3D1uHWhFMSq6l5OWW57sJPR4pVL6+lZawLvjz8zFxWuJUBoyrQ4E2?= =?us-ascii?Q?9+eySZ44Te6fluoIArHIv8QK+TDee26nw0Yov/d5ccSYLAMKludKBY0WFJQO?= =?us-ascii?Q?Xaku9NSsSamVw3QNMI8/iEno9DSZDJXnBlLaNU8PdmgwTLehJjjw3AdZZB2D?= =?us-ascii?Q?NcEGZYWHTM4ENz/B8MAmheYbX+Sx6JgkgYiglraKX7zGth9l3wVbWXFXwr4N?= =?us-ascii?Q?e+ktNKZJ8x9y0ii5cuC1o05X28vnZSevtjKhVxxQufV3ykYYUMG2cO2On6vC?= =?us-ascii?Q?GGqGm8sB3DXAfGBJ1YOGX2hq/9UcmLNec3+Ym3+XnT79/967GpwN+balYE+x?= =?us-ascii?Q?CbJ2+8zUXrgLbwZI6xhCzXGFYdx+C1fD5YDmO7mJuDRRiLrA2bqOTbMnaaZN?= =?us-ascii?Q?gHFMHCJ/flBf+MIjfVPobG0Zbik6i8C/jNo2fFT4K0jaubRCOz5BGU6aqQyT?= =?us-ascii?Q?vnc5gyHFhmcx2UV8afLOeXyL16VoCpaW46OnTlA8YKFQPy9GZno7JPIstsd8?= =?us-ascii?Q?s8rgpr5xz49auRhkUukH/87W59UzNiyanGA18YzBlUn7sjGcPtLKcw6rYC1I?= =?us-ascii?Q?cObfKBsDURn/EJxoH5reeocYMsaS83lFGqAENzRenhxkO6QdNfQ7xuK+GlmM?= =?us-ascii?Q?2BhCe/F6ygyIaT5tyTUEWaQIKD/Z?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230031)(376005)(36860700004)(7416005)(1800799015)(82310400017);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 May 2024 17:42:06.8099 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 30344116-f510-45de-90d2-08dc6f862e12 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000066E7.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6681 Add support for preserving the boot configuration done by the platform firmware per host bridge basis, based on the presence of 'linux,pci-probe-only' property in the respective PCI host bridge device-tree node. It also unifies the ACPI and DT based boot flows in this regard. This patch series is a complete version of the incomplete series ( https://lore.kernel.org/linux-pci/20240421190914.374399-1-helgaas@kernel.org/ ) posted by Bjorn which in turn was an attempted split work of the single V6 patch ( https://lore.kernel.org/linux-pci/20240418174043.3750240-1-vidyas@nvidia.com/ ) posted by me. Vidya Sagar (4): PCI: Move PRESERVE_BOOT_CONFIG _DSM evaluation to pci_register_host_bridge() PCI: of: Add of_pci_preserve_config() for per-host bridge support PCI: Unify ACPI and DT 'preserve config' support PCI: Use preserve_config in place of pci_flags drivers/acpi/pci_root.c | 12 ------ drivers/pci/controller/pci-host-common.c | 4 -- drivers/pci/of.c | 54 +++++++++++++++++++----- drivers/pci/pci-acpi.c | 22 ++++++++++ drivers/pci/pci.h | 12 ++++++ drivers/pci/probe.c | 34 ++++++++++----- 6 files changed, 101 insertions(+), 37 deletions(-) -- 2.25.1