memory.h File Reference

#include <zephyr/kernel.h>
#include <zephyr/xen/public/memory.h>
#include <zephyr/xen/public/xen.h>

Go to the source code of this file.

Functions
int	xendom_add_to_physmap (int domid, unsigned long idx, unsigned int space, xen_pfn_t gpfn)
	Add mapping for specified page frame in Xen domain physmap.
int	xendom_add_to_physmap_batch (int domid, int foreign_domid, unsigned int space, unsigned int size, xen_ulong_t *idxs, xen_pfn_t *gpfns, int *errs)
	Add mapping for specified set of page frames to Xen domain physmap.
int	xendom_remove_from_physmap (int domid, xen_pfn_t gpfn)
	Removes page frame from Xen domain physmap.
int	xendom_populate_physmap (int domid, unsigned int extent_order, unsigned int nr_extents, unsigned int mem_flags, xen_pfn_t *extent_start)
	Populate specified Xen domain page frames with memory.

Function Documentation

xendom_add_to_physmap()

int xendom_add_to_physmap	(	int	domid,
		unsigned long	idx,
		unsigned int	space,
		xen_pfn_t	gpfn
	)

Add mapping for specified page frame in Xen domain physmap.

Parameters

domid	domain id, where mapping will be added. For unprivileged should be DOMID_SELF.
idx	index into space being mapped.
space	XENMAPSPACE_* mapping space identifier.
gpfn	page frame where the source mapping page should appear.

Returns

zero on success, negative errno on error.

xendom_add_to_physmap_batch()

int xendom_add_to_physmap_batch	(	int	domid,
		int	foreign_domid,
		unsigned int	space,
		unsigned int	size,
		xen_ulong_t *	idxs,
		xen_pfn_t *	gpfns,
		int *	errs
	)

Add mapping for specified set of page frames to Xen domain physmap.

Parameters

domid	domain id, where mapping will be added. For unprivileged should be DOMID_SELF.
foreign_domid	for gmfn_foreign - domain id, whose pages being mapped, 0 for other.
space	XENMAPSPACE_* mapping space identifier.
size	number of page frames being mapped.
idxs	array of indexes into space being mapped.
gpfns	array of page frames where the mapping should appear.
errs	array of per-index error codes.

Returns

zero on success, negative errno on error.

xendom_populate_physmap()

int xendom_populate_physmap	(	int	domid,
		unsigned int	extent_order,
		unsigned int	nr_extents,
		unsigned int	mem_flags,
		xen_pfn_t *	extent_start
	)

Populate specified Xen domain page frames with memory.

Parameters

domid	domain id, where mapping will be added. For unprivileged should be DOMID_SELF.
extent_order	size/alignment of each extent (size is 2^extent_order), e.g. 0 for 4K extents, 9 for 2M etc.
nr_extents	number of page frames being populated.
mem_flags	N/A, should be 0 for Arm.
extent_start	page frame bases of extents to populate with memory.

Returns

number of populated frames success, negative errno on error.

xendom_remove_from_physmap()

int xendom_remove_from_physmap	(	int	domid,
		xen_pfn_t	gpfn
	)

Removes page frame from Xen domain physmap.

Parameters

domid	domain id, whose page is going to be removed. For unprivileged should be DOMID_SELF.
gpfn	page frame number, that needs to be removed

Returns

zero on success, negative errno on error.