/*
* Get the list of PFNs that are not in the psuedo-phys map.
* Although we allocate pages on demand, balloon driver may
* decreased simaltenously. So we have to free the freed
* pages here.
*/
static int
xc_ia64_recv_unallocated_list(int xc_handle, int io_fd, uint32_t dom,
struct xen_ia64_p2m_table *p2m_table)
{
int rc = -1;
unsigned int i;
unsigned int count;
unsigned long *pfntab = NULL;
unsigned int nr_frees;
if (read_exact(io_fd, &count, sizeof(count))) {
ERROR("Error when reading pfn count");
goto out;
}
pfntab = malloc(sizeof(unsigned long) * count);
if (pfntab == NULL) {
ERROR("Out of memory");
goto out;
}
if (read_exact(io_fd, pfntab, sizeof(unsigned long)*count)) {
ERROR("Error when reading pfntab");
goto out;
}
nr_frees = 0;
for (i = 0; i < count; i++) {
if (xc_ia64_p2m_allocated(p2m_table, pfntab[i])) {
pfntab[nr_frees] = pfntab[i];
nr_frees++;
}
}
if (nr_frees > 0) {
if (xc_domain_memory_decrease_reservation(xc_handle, dom, nr_frees,
0, pfntab) < 0) {
PERROR("Could not decrease reservation");
goto out;
} else
DPRINTF("Decreased reservation by %d / %d pages\n",
nr_frees, count);
}
rc = 0;
out:
if (pfntab != NULL)
free(pfntab);
return rc;
}
unsigned long xc_make_page_below_4G(
int xc_handle, uint32_t domid, unsigned long mfn)
{
xen_pfn_t old_mfn = mfn;
xen_pfn_t new_mfn;
if ( xc_domain_memory_decrease_reservation(
xc_handle, domid, 1, 0, &old_mfn) != 0 )
{
DPRINTF("xc_make_page_below_4G decrease failed. mfn=%lx\n",mfn);
return 0;
}
if ( xc_domain_memory_increase_reservation(
xc_handle, domid, 1, 0, XENMEMF_address_bits(32), &new_mfn) != 0 )
{
DPRINTF("xc_make_page_below_4G increase failed. mfn=%lx\n",mfn);
return 0;
}
return new_mfn;
}
