xen: register xen pci notifier (e28c31a9) · Commits · 戴 / test

drivers/xen/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -13,3 +13,4 @@ obj-$(CONFIG_XENFS) += xenfs/
		obj-$(CONFIG_XEN_SYS_HYPERVISOR) += sys-hypervisor.o
		obj-$(CONFIG_XEN_PLATFORM_PCI) += platform-pci.o
		obj-$(CONFIG_SWIOTLB_XEN) += swiotlb-xen.o
		obj-$(CONFIG_XEN_DOM0) += pci.o

drivers/xen/pci.c

0 → 100644

+117 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2009, Intel Corporation.
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms and conditions of the GNU General Public License,
		* version 2, as published by the Free Software Foundation.
		*
		* This program is distributed in the hope it will be useful, but WITHOUT
		* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
		* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
		* more details.
		*
		* You should have received a copy of the GNU General Public License along with
		* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
		* Place - Suite 330, Boston, MA 02111-1307 USA.
		*
		* Author: Weidong Han <weidong.han@intel.com>
		*/

		#include <linux/pci.h>
		#include <xen/xen.h>
		#include <xen/interface/physdev.h>
		#include <xen/interface/xen.h>

		#include <asm/xen/hypervisor.h>
		#include <asm/xen/hypercall.h>
		#include "../pci/pci.h"

		static int xen_add_device(struct device *dev)
		{
		int r;
		struct pci_dev *pci_dev = to_pci_dev(dev);

		#ifdef CONFIG_PCI_IOV
		if (pci_dev->is_virtfn) {
		struct physdev_manage_pci_ext manage_pci_ext = {
		.bus = pci_dev->bus->number,
		.devfn = pci_dev->devfn,
		.is_virtfn = 1,
		.physfn.bus = pci_dev->physfn->bus->number,
		.physfn.devfn = pci_dev->physfn->devfn,
		};

		r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
		&manage_pci_ext);
		} else
		#endif
		if (pci_ari_enabled(pci_dev->bus) && PCI_SLOT(pci_dev->devfn)) {
		struct physdev_manage_pci_ext manage_pci_ext = {
		.bus = pci_dev->bus->number,
		.devfn = pci_dev->devfn,
		.is_extfn = 1,
		};

		r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add_ext,
		&manage_pci_ext);
		} else {
		struct physdev_manage_pci manage_pci = {
		.bus = pci_dev->bus->number,
		.devfn = pci_dev->devfn,
		};

		r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_add,
		&manage_pci);
		}

		return r;
		}

		static int xen_remove_device(struct device *dev)
		{
		int r;
		struct pci_dev *pci_dev = to_pci_dev(dev);
		struct physdev_manage_pci manage_pci;

		manage_pci.bus = pci_dev->bus->number;
		manage_pci.devfn = pci_dev->devfn;

		r = HYPERVISOR_physdev_op(PHYSDEVOP_manage_pci_remove,
		&manage_pci);

		return r;
		}

		static int xen_pci_notifier(struct notifier_block *nb,
		unsigned long action, void *data)
		{
		struct device *dev = data;
		int r = 0;

		switch (action) {
		case BUS_NOTIFY_ADD_DEVICE:
		r = xen_add_device(dev);
		break;
		case BUS_NOTIFY_DEL_DEVICE:
		r = xen_remove_device(dev);
		break;
		default:
		break;
		}

		return r;
		}

		struct notifier_block device_nb = {
		.notifier_call = xen_pci_notifier,
		};

		static int __init register_xen_pci_notifier(void)
		{
		if (!xen_initial_domain())
		return 0;

		return bus_register_notifier(&pci_bus_type, &device_nb);
		}

		arch_initcall(register_xen_pci_notifier);

include/xen/interface/physdev.h

+21 −0

Original line number	Diff line number	Diff line
		@@ -136,6 +136,27 @@ struct physdev_unmap_pirq {
		int pirq;
		};

		#define PHYSDEVOP_manage_pci_add 15
		#define PHYSDEVOP_manage_pci_remove 16
		struct physdev_manage_pci {
		/* IN */
		uint8_t bus;
		uint8_t devfn;
		};

		#define PHYSDEVOP_manage_pci_add_ext 20
		struct physdev_manage_pci_ext {
		/* IN */
		uint8_t bus;
		uint8_t devfn;
		unsigned is_extfn;
		unsigned is_virtfn;
		struct {
		uint8_t bus;
		uint8_t devfn;
		} physfn;
		};

		/*
		* Argument to physdev_op_compat() hypercall. Superceded by new physdev_op()
		* hypercall since 0x00030202.

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