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EDITING: page.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _XEN_PAGE_H
#define _XEN_PAGE_H

#include <asm/page.h>

/* The hypercall interface supports only 4KB page */
#define XEN_PAGE_SHIFT	12
#define XEN_PAGE_SIZE	(_AC(1, UL) << XEN_PAGE_SHIFT)
#define XEN_PAGE_MASK	(~(XEN_PAGE_SIZE-1))
#define xen_offset_in_page(p)	((unsigned long)(p) & ~XEN_PAGE_MASK)

/*
 * We assume that PAGE_SIZE is a multiple of XEN_PAGE_SIZE
 * XXX: Add a BUILD_BUG_ON?
 */

#define xen_pfn_to_page(xen_pfn)	\
	(pfn_to_page((unsigned long)(xen_pfn) >> (PAGE_SHIFT - XEN_PAGE_SHIFT)))
#define page_to_xen_pfn(page)		\
	((page_to_pfn(page)) << (PAGE_SHIFT - XEN_PAGE_SHIFT))

#define XEN_PFN_PER_PAGE	(PAGE_SIZE / XEN_PAGE_SIZE)

#define XEN_PFN_DOWN(x)	((x) >> XEN_PAGE_SHIFT)
#define XEN_PFN_UP(x)	(((x) + XEN_PAGE_SIZE-1) >> XEN_PAGE_SHIFT)

#include <asm/xen/page.h>

/* Return the GFN associated to the first 4KB of the page */
static inline unsigned long xen_page_to_gfn(struct page *page)
{
	return pfn_to_gfn(page_to_xen_pfn(page));
}

struct xen_memory_region {
	unsigned long start_pfn;
	unsigned long n_pfns;
};

#define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820_MAX_ENTRIES_ZEROPAGE */

extern __initdata
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS];

extern unsigned long xen_released_pages;

#endif	/* _XEN_PAGE_H */

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 arm/	DIR	—	2026-03-10 17:30
📁 interface/	DIR	—	2026-03-10 17:30
📄 acpi.h	H	3.2 KB	2025-09-28 21:39	EDIT
📄 balloon.h	H	1 KB	2025-09-28 21:39	EDIT
📄 events.h	H	4.8 KB	2025-09-28 21:39	EDIT
📄 features.h	H	502 B	2025-09-28 21:39	EDIT
📄 grant_table.h	H	11.1 KB	2025-09-28 21:39	EDIT
📄 hvc-console.h	H	518 B	2025-09-28 21:39	EDIT
📄 hvm.h	H	1.4 KB	2025-09-28 21:39	EDIT
📄 mem-reservation.h	H	1.5 KB	2025-09-28 21:39	EDIT
📄 page.h	H	1.3 KB	2025-09-28 21:39	EDIT
📄 pci.h	H	745 B	2025-09-28 21:39	EDIT
📄 platform_pci.h	H	2 KB	2025-09-28 21:39	EDIT
📄 swiotlb-xen.h	H	483 B	2025-09-28 21:39	EDIT
📄 xen-front-pgdir-shbuf.h	H	2.3 KB	2025-09-28 21:39	EDIT
📄 xen-ops.h	H	6.5 KB	2025-09-28 21:39	EDIT
📄 xen.h	H	2.3 KB	2025-09-28 21:39	EDIT
📄 xenbus.h	H	8.6 KB	2025-09-28 21:39	EDIT
📄 xenbus_dev.h	H	1.8 KB	2025-09-28 21:39	EDIT