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@xxxxxxxxxx/ ) 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@xxxxxxxxxx/ ) 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
