void xc_dom_unmap_one(struct xc_dom_image *dom, xen_pfn_t pfn)
{
unsigned int page_shift = XC_DOM_PAGE_SHIFT(dom);
struct xc_dom_phys *phys, *prev = NULL;
for ( phys = dom->phys_pages; phys != NULL; phys = phys->next )
{
if ( (pfn >= phys->first) && (pfn < (phys->first + phys->count)) )
break;
prev = phys;
}
if ( !phys )
{
DOMPRINTF("%s: Huh? no mapping with pfn 0x%" PRIpfn "",
__FUNCTION__, pfn);
return;
}
munmap(phys->ptr, phys->count << page_shift);
if ( prev )
prev->next = phys->next;
else
dom->phys_pages = phys->next;
xc_domain_cacheflush(dom->xch, dom->guest_domid, phys->first, phys->count);
}
int xc_dom_gnttab_seed(xc_interface *xch, domid_t domid,
xen_pfn_t console_gmfn,
xen_pfn_t xenstore_gmfn,
domid_t console_domid,
domid_t xenstore_domid)
{
xen_pfn_t gnttab_gmfn;
grant_entry_v1_t *gnttab;
gnttab_gmfn = xc_dom_gnttab_setup(xch, domid);
if ( gnttab_gmfn == -1 )
return -1;
gnttab = xc_map_foreign_range(xch,
domid,
PAGE_SIZE,
PROT_READ|PROT_WRITE,
gnttab_gmfn);
if ( gnttab == NULL )
{
xc_dom_panic(xch, XC_INTERNAL_ERROR,
"%s: failed to map domU grant table "
"[errno=%d]\n",
__FUNCTION__, errno);
return -1;
}
if ( domid != console_domid && console_gmfn != -1)
{
gnttab[GNTTAB_RESERVED_CONSOLE].flags = GTF_permit_access;
gnttab[GNTTAB_RESERVED_CONSOLE].domid = console_domid;
gnttab[GNTTAB_RESERVED_CONSOLE].frame = console_gmfn;
}
if ( domid != xenstore_domid && xenstore_gmfn != -1)
{
gnttab[GNTTAB_RESERVED_XENSTORE].flags = GTF_permit_access;
gnttab[GNTTAB_RESERVED_XENSTORE].domid = xenstore_domid;
gnttab[GNTTAB_RESERVED_XENSTORE].frame = xenstore_gmfn;
}
if ( munmap(gnttab, PAGE_SIZE) == -1 )
{
xc_dom_panic(xch, XC_INTERNAL_ERROR,
"%s: failed to unmap domU grant table "
"[errno=%d]\n",
__FUNCTION__, errno);
return -1;
}
/* Guest shouldn't really touch its grant table until it has
* enabled its caches. But lets be nice. */
xc_domain_cacheflush(xch, domid, gnttab_gmfn, 1);
return 0;
}
int xc_clear_domain_page(xc_interface *xch,
uint32_t domid,
unsigned long dst_pfn)
{
void *vaddr = xc_map_foreign_range(
xch, domid, PAGE_SIZE, PROT_WRITE, dst_pfn);
if ( vaddr == NULL )
return -1;
memset(vaddr, 0, PAGE_SIZE);
munmap(vaddr, PAGE_SIZE);
xc_domain_cacheflush(xch, domid, dst_pfn, 1);
return 0;
}
int xc_copy_to_domain_page(xc_interface *xch,
uint32_t domid,
unsigned long dst_pfn,
const char *src_page)
{
void *vaddr = xc_map_foreign_range(
xch, domid, PAGE_SIZE, PROT_WRITE, dst_pfn);
if ( vaddr == NULL )
return -1;
memcpy(vaddr, src_page, PAGE_SIZE);
munmap(vaddr, PAGE_SIZE);
xc_domain_cacheflush(xch, domid, dst_pfn, 1);
return 0;
}
int xc_clear_domain_pages(xc_interface *xch,
uint32_t domid,
unsigned long dst_pfn,
int num)
{
size_t size = num * PAGE_SIZE;
void *vaddr = xc_map_foreign_range(
xch, domid, size, PROT_WRITE, dst_pfn);
if ( vaddr == NULL )
return -1;
memset(vaddr, 0, size);
munmap(vaddr, size);
xc_domain_cacheflush(xch, domid, dst_pfn, num);
return 0;
}