Esempi in C++ (Cpp) per paging_get_guest_pages

Esempio n. 1

File: mmio.c Progetto: jieunee/jailhouse

/* If current_page is non-NULL, pc must have been increased exactly by 1. */
static u8 *map_code_page(const struct guest_paging_structures *pg_structs,
			 unsigned long pc, u8 *current_page)
{
	/* If page offset is 0, previous pc was pointing to a different page,
	 * and we have to map a new one now. */
	if (current_page && ((pc & ~PAGE_MASK) != 0))
		return current_page;
	return paging_get_guest_pages(pg_structs, pc, 1, PAGE_READONLY_FLAGS);
}

Esempio n. 2

File: vcpu.c Progetto: berte/jailhouse

const u8 *vcpu_map_inst(const struct guest_paging_structures *pg_structs,
			unsigned long pc, unsigned int *size)
{
	unsigned short bytes_avail;
	u8 *page = NULL;

	if (!*size)
		goto out_err;
	page = paging_get_guest_pages(pg_structs, pc,
			1, PAGE_READONLY_FLAGS);
	if (!page)
		goto out_err;

	/* Number of bytes available before page boundary */
	bytes_avail = PAGE_SIZE - (pc & PAGE_OFFS_MASK);
	if (*size > bytes_avail)
		*size = bytes_avail;

	return &page[pc & PAGE_OFFS_MASK];

out_err:
	return NULL;
}