gasp_map_contig()

Map a guest physical address range into the qvm process address space for virtual hardware access

Synopsis:

#include <qvm/gasp.h>

void* gasp_map_contig(const vdev_t *vdev,
                      int prot,
                      uint64_t *ppaddr,
                      size_t *plength)

Arguments:

vdev: A pointer to a vdev structure for a vdev that will make DMA-like transactions.
prot: PROT_* protection bits for the mappings, optionally GMF_MAP_ANY.
ppaddr: A pointer to the guest-physical address to map on entry; when the function exits, this location holds the corresponding host-physical address.
plength: The maximum number of bytes to be mapped in on entry; when the function exits, this location is holds the actual number of bytes that were mapped.

Library:

Provided by qvm; no external library is required.

Description:

Use this function instead of gasp_map_vdma() when you must obtain information about the host-physical addresses.

Call gasp_unmap() to unmap the address range.

Returns:

A qvm process pointer that maps the guest physical address, or NULL if unsuccessful.