Jiang Liu 2c62e8492e x86/PCI/ACPI: Make all resources except [io 0xcf8-0xcff] available on PCI bus ... An IO port or MMIO resource assigned to a PCI host bridge may be consumed by the host bridge itself or available to its child bus/devices. The ACPI specification defines a bit (Producer/Consumer) to tell whether the resource is consumed by the host bridge itself, but firmware hasn't used that bit consistently, so we can't rely on it. Before commit 593669c2ac ("x86/PCI/ACPI: Use common ACPI resource interfaces to simplify implementation"), arch/x86/pci/acpi.c ignored all IO port resources defined by acpi_resource_io and acpi_resource_fixed_io to filter out IO ports consumed by the host bridge itself. Commit 593669c2ac ("x86/PCI/ACPI: Use common ACPI resource interfaces to simplify implementation") started accepting all IO port and MMIO resources, which caused a regression that IO port resources consumed by the host bridge itself became available to its child devices. Then commit 63f1789ec7 ("x86/PCI/ACPI: Ignore resources consumed by host bridge itself") ignored resources consumed by the host bridge itself by checking the IORESOURCE_WINDOW flag, which accidently removed MMIO resources defined by acpi_resource_memory24, acpi_resource_memory32 and acpi_resource_fixed_memory32. On x86 and IA64 platforms, all IO port and MMIO resources are assumed to be available to child bus/devices except one special case: IO port [0xCF8-0xCFF] is consumed by the host bridge itself to access PCI configuration space. So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF]. This solution will also ease the way to consolidate ACPI PCI host bridge common code from x86, ia64 and ARM64. Related ACPI table are archived at: https://bugzilla.kernel.org/show_bug.cgi?id=94221 Related discussions at: http://patchwork.ozlabs.org/patch/461633/ https://lkml.org/lkml/2015/3/29/304 Fixes: 63f1789ec7 (Ignore resources consumed by host bridge itself) Reported-by: Bernhard Thaler <bernhard.thaler@wvnet.at> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Cc: 4.0+ <stable@vger.kernel.org> # 4.0+ Reviewed-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2015-04-30 22:17:34 +02:00
..
acpi.c	x86/PCI/ACPI: Make all resources except [io 0xcf8-0xcff] available on PCI bus	2015-04-30 22:17:34 +02:00
amd_bus.c	x86/PCI: Clean up and mark early_root_info_init() as deprecated	2014-05-27 10:47:49 -06:00
broadcom_bus.c	x86/PCI: Fix Broadcom CNB20LE unintended sign extension	2014-04-25 11:01:08 -06:00
bus_numa.c	PCI: Use common resource list management code instead of private implementation	2015-02-05 15:09:25 +01:00
bus_numa.h
ce4100.c
common.c	PCI changes for the v4.1 merge window:	2015-04-13 15:45:47 -07:00
direct.c
early.c
fixup.c	vgaarb: Don't default exclusively to first video device with mem+io	2014-09-16 13:06:18 -06:00
i386.c	x86/PCI: Clip bridge windows to fit in upstream windows	2015-01-16 10:04:42 -06:00
init.c
intel_mid_pci.c	Revert "x86/PCI: Refine the way to release PCI IRQ resources"	2015-03-20 14:56:19 +01:00
irq.c	Revert "x86/PCI: Refine the way to release PCI IRQ resources"	2015-03-20 14:56:19 +01:00
legacy.c
Makefile	x86, platforms: Remove NUMAQ	2014-02-27 08:07:39 -08:00
mmconfig_32.c
mmconfig_64.c
mmconfig-shared.c	ACPI and power management updates for v3.20-rc1	2015-02-10 15:09:41 -08:00
numachip.c	x86: numachip: APIC driver cleanups	2014-11-04 18:17:27 +01:00
olpc.c
pcbios.c	x86/PCI: Mark PCI BIOS initialization code as such	2014-09-24 06:46:27 -06:00
sta2x11-fixup.c	x86: enable DMA CMA with swiotlb	2014-06-04 16:53:57 -07:00
xen.c	PCI changes for the v3.20 merge window:	2015-02-10 14:31:28 -08:00