mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
cae7d81a37
Decouple XEN_DOM0 from XEN_PV, converting some existing uses of XEN_DOM0 to a new XEN_PV_DOM0. (I'm not convinced all are really / should really be PV-specific, but for starters I've tried to be conservative.) For PVH Dom0 the hypervisor populates MADT with only x2APIC entries, so without x2APIC support enabled in the kernel things aren't going to work very well. (As opposed, DomU-s would only ever see LAPIC entries in MADT as of now.) Note that this then requires PVH Dom0 to be 64-bit, as X86_X2APIC depends on X86_64. In the course of this xen_running_on_version_or_later() needs to be available more broadly. Move it from a PV-specific to a generic file, considering that what it does isn't really PV-specific at all anyway. Note that xen/interface/version.h cannot be included on its own; in enlighten.c, which uses SCHEDOP_* anyway, include xen/interface/sched.h first to resolve the apparently sole missing type (xen_ulong_t). Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/983bb72f-53df-b6af-14bd-5e088bd06a08@suse.com Signed-off-by: Juergen Gross <jgross@suse.com>
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_XEN_PCI_H
|
|
#define _ASM_X86_XEN_PCI_H
|
|
|
|
#if defined(CONFIG_PCI_XEN)
|
|
extern int __init pci_xen_init(void);
|
|
extern int __init pci_xen_hvm_init(void);
|
|
#define pci_xen 1
|
|
#else
|
|
#define pci_xen 0
|
|
#define pci_xen_init (0)
|
|
static inline int pci_xen_hvm_init(void)
|
|
{
|
|
return -1;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_XEN_PV_DOM0
|
|
int __init pci_xen_initial_domain(void);
|
|
#else
|
|
static inline int __init pci_xen_initial_domain(void)
|
|
{
|
|
return -1;
|
|
}
|
|
#endif
|
|
#ifdef 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
|
|
|
|
#if defined(CONFIG_PCI_MSI)
|
|
#if defined(CONFIG_PCI_XEN)
|
|
/* The drivers/pci/xen-pcifront.c sets this structure to
|
|
* its own functions.
|
|
*/
|
|
struct xen_pci_frontend_ops {
|
|
int (*enable_msi)(struct pci_dev *dev, int vectors[]);
|
|
void (*disable_msi)(struct pci_dev *dev);
|
|
int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
|
|
void (*disable_msix)(struct pci_dev *dev);
|
|
};
|
|
|
|
extern struct xen_pci_frontend_ops *xen_pci_frontend;
|
|
|
|
static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
|
|
int vectors[])
|
|
{
|
|
if (xen_pci_frontend && xen_pci_frontend->enable_msi)
|
|
return xen_pci_frontend->enable_msi(dev, vectors);
|
|
return -ENOSYS;
|
|
}
|
|
static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
|
|
{
|
|
if (xen_pci_frontend && xen_pci_frontend->disable_msi)
|
|
xen_pci_frontend->disable_msi(dev);
|
|
}
|
|
static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
|
|
int vectors[], int nvec)
|
|
{
|
|
if (xen_pci_frontend && xen_pci_frontend->enable_msix)
|
|
return xen_pci_frontend->enable_msix(dev, vectors, nvec);
|
|
return -ENOSYS;
|
|
}
|
|
static inline void xen_pci_frontend_disable_msix(struct pci_dev *dev)
|
|
{
|
|
if (xen_pci_frontend && xen_pci_frontend->disable_msix)
|
|
xen_pci_frontend->disable_msix(dev);
|
|
}
|
|
#endif /* CONFIG_PCI_XEN */
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
#endif /* _ASM_X86_XEN_PCI_H */
|