This patchset provides a generic ACPI based PCI host controller implementation and uses it on arm64. The first patch moves the common code to handle MCFG ACPI table from arch/x86 to drivers/acpi/pci_mcfg.c. The last patch in the patchset provides the generic PCI host controller with a new file driver/pci/host/pci-host-acpi.c. The other patches are to fix up arm64 and ACPI code to work with these two patches. The pci-host-acpi implementation keeps a reference to pci_mmcfg_region entry so that config space access is done with a simple mapping and generic PCI config read/write. There is also an implementation of raw_pci_read/raw_pci_write provided by walking the pci_mmcfg_list This is tested with arm64 QEMU and OVMF and on x86 with qemu. Comments are very welcome. Thanks, JC. v2->v3: - Move maintainence of the pci_mmcfg_list to drivers/acpi/pci_mcfg.c without changing x86 logic - use the pci_mmcfg_list in ARM64 implementation - provide raw_pci_read/raw_pci_write v1->v2: - use CONFIG_PCI_MMCONFIG on arm64, provide a weak implementation of pci_mmcfg_late_init for arm64. - The real implementation of pci_mmcfg_late_init is in pci-host-acpi.c and it will save the MCFG table entries to an array. Earlier this was done with an arch_init call - remove unneeded pci_bus_add_devices call and fix MCFG saving code - Added a patch to ACPI pci_root.c to handle arm64 PCI IO resources Jayachandran C (5): APCI: MCFG: Move mmcfg_list management to drivers/acpi arm64: pci: Add ACPI support PCI: Handle NULL parent in pci_bus_assign_domain_nr ACPI: PCI: Support platforms that need pci_remap_iospace PCI: ACPI: Add a generic ACPI based host controller arch/arm64/Kconfig | 3 + arch/arm64/kernel/pci.c | 65 ++++++++- arch/x86/include/asm/pci_x86.h | 24 +--- arch/x86/pci/mmconfig-shared.c | 269 +++++------------------------------ arch/x86/pci/mmconfig_32.c | 1 + arch/x86/pci/mmconfig_64.c | 1 + drivers/acpi/Makefile | 1 + drivers/acpi/pci_mcfg.c | 298 +++++++++++++++++++++++++++++++++++++++ drivers/acpi/pci_root.c | 62 +++++++- drivers/acpi/resource.c | 2 + drivers/pci/host/Kconfig | 7 + drivers/pci/host/Makefile | 1 + drivers/pci/host/pci-host-acpi.c | 193 +++++++++++++++++++++++++ drivers/pci/pci.c | 7 +- include/linux/pci-acpi.h | 33 +++++ 15 files changed, 701 insertions(+), 266 deletions(-) create mode 100644 drivers/acpi/pci_mcfg.c create mode 100644 drivers/pci/host/pci-host-acpi.c -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
