Commit cfeb8139 authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

Merge branch 'pci/host-hv' into next

* pci/host-hv:
  PCI: hv: Add paravirtual PCI front-end for Microsoft Hyper-V VMs
  PCI: Look up IRQ domain by fwnode_handle
  PCI: Add fwnode_handle to x86 pci_sysdata
parents 562df5c8 4daace0d
......@@ -5193,6 +5193,7 @@ F: arch/x86/kernel/cpu/mshyperv.c
F: drivers/hid/hid-hyperv.c
F: drivers/hv/
F: drivers/input/serio/hyperv-keyboard.c
F: drivers/pci/host/pci-hyperv.c
F: drivers/net/hyperv/
F: drivers/scsi/storvsc_drv.c
F: drivers/video/fbdev/hyperv_fb.c
......
......@@ -20,6 +20,9 @@ struct pci_sysdata {
#ifdef CONFIG_X86_64
void *iommu; /* IOMMU private data */
#endif
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
void *fwnode; /* IRQ domain for MSI assignment */
#endif
};
extern int pci_routeirq;
......@@ -32,6 +35,7 @@ extern int noioapicreroute;
static inline int pci_domain_nr(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
return sd->domain;
}
......@@ -41,6 +45,17 @@ static inline int pci_proc_domain(struct pci_bus *bus)
}
#endif
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
return sd->fwnode;
}
#define pci_root_bus_fwnode _pci_root_bus_fwnode
#endif
/* Can be used to override the logic in pci_scan_bus for skipping
already-configured bus numbers - to be used for buggy BIOSes
or architectures with incomplete PCI setup by the loader */
......
......@@ -121,5 +121,11 @@ config PCI_LABEL
def_bool y if (DMI || ACPI)
select NLS
source "drivers/pci/hotplug/Kconfig"
config PCI_HYPERV
tristate "Hyper-V PCI Frontend"
depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
help
The PCI device frontend driver allows the kernel to import arbitrary
PCI devices from a PCI backend to support PCI driver domains.
source "drivers/pci/host/Kconfig"
......@@ -3,6 +3,7 @@ obj-$(CONFIG_PCIE_DW_PLAT) += pcie-designware-plat.o
obj-$(CONFIG_PCI_DRA7XX) += pci-dra7xx.o
obj-$(CONFIG_PCI_EXYNOS) += pci-exynos.o
obj-$(CONFIG_PCI_IMX6) += pci-imx6.o
obj-$(CONFIG_PCI_HYPERV) += pci-hyperv.o
obj-$(CONFIG_PCI_MVEBU) += pci-mvebu.o
obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o
obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o
......
This diff is collapsed.
......@@ -15,6 +15,7 @@
#include <linux/pci-aspm.h>
#include <linux/aer.h>
#include <linux/acpi.h>
#include <linux/irqdomain.h>
#include "pci.h"
#define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */
......@@ -674,6 +675,20 @@ static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus)
if (!d)
d = pci_host_bridge_acpi_msi_domain(bus);
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
/*
* If no IRQ domain was found via the OF tree, try looking it up
* directly through the fwnode_handle.
*/
if (!d) {
struct fwnode_handle *fwnode = pci_root_bus_fwnode(bus);
if (fwnode)
d = irq_find_matching_fwnode(fwnode,
DOMAIN_BUS_PCI_MSI);
}
#endif
return d;
}
......
......@@ -1522,6 +1522,10 @@ static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
#include <asm/pci.h>
#ifndef pci_root_bus_fwnode
#define pci_root_bus_fwnode(bus) NULL
#endif
/* these helpers provide future and backwards compatibility
* for accessing popular PCI BAR info */
#define pci_resource_start(dev, bar) ((dev)->resource[(bar)].start)
......
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