arch/x86/include/asm/xen/pci.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/xen/pci.h

Extension

.h

Size

1814 bytes

Lines

68

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• struct xen_pci_frontend_ops
• function pci_xen_hvm_init
• function pci_xen_initial_domain
• function xen_pci_frontend_enable_msi
• function xen_pci_frontend_disable_msi
• function xen_pci_frontend_enable_msix
• function xen_pci_frontend_disable_msix

Annotated Snippet

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 */

Annotation

• Detected declarations: `struct xen_pci_frontend_ops`, `function pci_xen_hvm_init`, `function pci_xen_initial_domain`, `function xen_pci_frontend_enable_msi`, `function xen_pci_frontend_disable_msi`, `function xen_pci_frontend_enable_msix`, `function xen_pci_frontend_disable_msix`.
• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: source implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.