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But it can also be used by other architectures, e.g. Arm. Re-structure the driver in a way that it can be built for other platforms as well. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Anastasiia Lukianenko --- Since v2: - swap the patch order Since v1: - Do not move pci_xen_initial_domain as it is x86 specific --- arch/x86/include/asm/xen/pci.h | 18 +------ arch/x86/pci/xen.c | 74 +---------------------------- drivers/xen/pci.c | 75 ++++++++++++++++++++++++++++++ drivers/xen/xen-pciback/pci_stub.c | 3 +- drivers/xen/xen-pciback/xenbus.c | 2 +- include/xen/pci.h | 28 +++++++++++ 6 files changed, 108 insertions(+), 92 deletions(-) create mode 100644 include/xen/pci.h diff --git a/arch/x86/include/asm/xen/pci.h b/arch/x86/include/asm/xen/pci.h index 3506d8c598c1..2889f091f459 100644 --- a/arch/x86/include/asm/xen/pci.h +++ b/arch/x86/include/asm/xen/pci.h @@ -16,26 +16,10 @@ static inline int pci_xen_hvm_init(void) #endif #if defined(CONFIG_XEN_DOM0) int __init pci_xen_initial_domain(void); -int xen_find_device_domain_owner(struct pci_dev *dev); -int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain); -int xen_unregister_device_domain_owner(struct pci_dev *dev); #else static inline int __init pci_xen_initial_domain(void) { - return -1; -} -static inline int xen_find_device_domain_owner(struct pci_dev *dev) -{ - return -1; -} -static inline int xen_register_device_domain_owner(struct pci_dev *dev, - uint16_t domain) -{ - return -1; -} -static inline int xen_unregister_device_domain_owner(struct pci_dev *dev) -{ - return -1; + return -1; } #endif diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 3d41a09c2c14..4a45b0bf9ae4 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -23,6 +23,7 @@ #include #include +#include #include #include #include @@ -583,77 +584,4 @@ int __init pci_xen_initial_domain(void) } return 0; } - -struct xen_device_domain_owner { - domid_t domain; - struct pci_dev *dev; - struct list_head list; -}; - -static DEFINE_SPINLOCK(dev_domain_list_spinlock); -static struct list_head dev_domain_list = LIST_HEAD_INIT(dev_domain_list); - -static struct xen_device_domain_owner *find_device(struct pci_dev *dev) -{ - struct xen_device_domain_owner *owner; - - list_for_each_entry(owner, &dev_domain_list, list) { - if (owner->dev == dev) - return owner; - } - return NULL; -} - -int xen_find_device_domain_owner(struct pci_dev *dev) -{ - struct xen_device_domain_owner *owner; - int domain = -ENODEV; - - spin_lock(&dev_domain_list_spinlock); - owner = find_device(dev); - if (owner) - domain = owner->domain; - spin_unlock(&dev_domain_list_spinlock); - return domain; -} -EXPORT_SYMBOL_GPL(xen_find_device_domain_owner); - -int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain) -{ - struct xen_device_domain_owner *owner; - - owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL); - if (!owner) - return -ENODEV; - - spin_lock(&dev_domain_list_spinlock); - if (find_device(dev)) { - spin_unlock(&dev_domain_list_spinlock); - kfree(owner); - return -EEXIST; - } - owner->domain = domain; - owner->dev = dev; - list_add_tail(&owner->list, &dev_domain_list); - spin_unlock(&dev_domain_list_spinlock); - return 0; -} -EXPORT_SYMBOL_GPL(xen_register_device_domain_owner); - -int xen_unregister_device_domain_owner(struct pci_dev *dev) -{ - struct xen_device_domain_owner *owner; - - spin_lock(&dev_domain_list_spinlock); - owner = find_device(dev); - if (!owner) { - spin_unlock(&dev_domain_list_spinlock); - return -ENODEV; - } - list_del(&owner->list); - spin_unlock(&dev_domain_list_spinlock); - kfree(owner); - return 0; -} -EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner); #endif diff --git a/drivers/xen/pci.c b/drivers/xen/pci.c index 224df03ce42e..fc8c1249d49f 100644 --- a/drivers/xen/pci.c +++ b/drivers/xen/pci.c @@ -254,3 +254,78 @@ static int xen_mcfg_late(void) return 0; } #endif + +#ifdef CONFIG_XEN_DOM0 +struct xen_device_domain_owner { + domid_t domain; + struct pci_dev *dev; + struct list_head list; +}; + +static DEFINE_SPINLOCK(dev_domain_list_spinlock); +static struct list_head dev_domain_list = LIST_HEAD_INIT(dev_domain_list); + +static struct xen_device_domain_owner *find_device(struct pci_dev *dev) +{ + struct xen_device_domain_owner *owner; + + list_for_each_entry(owner, &dev_domain_list, list) { + if (owner->dev == dev) + return owner; + } + return NULL; +} + +int xen_find_device_domain_owner(struct pci_dev *dev) +{ + struct xen_device_domain_owner *owner; + int domain = -ENODEV; + + spin_lock(&dev_domain_list_spinlock); + owner = find_device(dev); + if (owner) + domain = owner->domain; + spin_unlock(&dev_domain_list_spinlock); + return domain; +} +EXPORT_SYMBOL_GPL(xen_find_device_domain_owner); + +int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain) +{ + struct xen_device_domain_owner *owner; + + owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL); + if (!owner) + return -ENODEV; + + spin_lock(&dev_domain_list_spinlock); + if (find_device(dev)) { + spin_unlock(&dev_domain_list_spinlock); + kfree(owner); + return -EEXIST; + } + owner->domain = domain; + owner->dev = dev; + list_add_tail(&owner->list, &dev_domain_list); + spin_unlock(&dev_domain_list_spinlock); + return 0; +} +EXPORT_SYMBOL_GPL(xen_register_device_domain_owner); + +int xen_unregister_device_domain_owner(struct pci_dev *dev) +{ + struct xen_device_domain_owner *owner; + + spin_lock(&dev_domain_list_spinlock); + owner = find_device(dev); + if (!owner) { + spin_unlock(&dev_domain_list_spinlock); + return -ENODEV; + } + list_del(&owner->list); + spin_unlock(&dev_domain_list_spinlock); + kfree(owner); + return 0; +} +EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner); +#endif diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c index f8e4faa96ad6..bba527620507 100644 --- a/drivers/xen/xen-pciback/pci_stub.c +++ b/drivers/xen/xen-pciback/pci_stub.c @@ -19,7 +19,8 @@ #include #include #include -#include +#include +#include #include #include #include "pciback.h" diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c index f8ba2903a3ff..bde63ef677b8 100644 --- a/drivers/xen/xen-pciback/xenbus.c +++ b/drivers/xen/xen-pciback/xenbus.c @@ -14,7 +14,7 @@ #include #include #include -#include +#include #include "pciback.h" #define INVALID_EVTCHN_IRQ (-1) diff --git a/include/xen/pci.h b/include/xen/pci.h new file mode 100644 index 000000000000..b8337cf85fd1 --- /dev/null +++ b/include/xen/pci.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __XEN_PCI_H__ +#define __XEN_PCI_H__ + +#if defined(CONFIG_XEN_DOM0) +int xen_find_device_domain_owner(struct pci_dev *dev); +int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain); +int xen_unregister_device_domain_owner(struct pci_dev *dev); +#else +static inline int xen_find_device_domain_owner(struct pci_dev *dev) +{ + return -1; +} + +static inline int xen_register_device_domain_owner(struct pci_dev *dev, + uint16_t domain) +{ + return -1; +} + +static inline int xen_unregister_device_domain_owner(struct pci_dev *dev) +{ + return -1; +} +#endif + +#endif -- 2.25.1