Ejemplos de xc_map_foreign_ranges en C++ (Cpp)

Ejemplo n.º 1

Archivo: xc_dom_boot.c Proyecto: mikesun/xen-cow-checkpointing

void *xc_dom_boot_domU_map(struct xc_dom_image *dom, xen_pfn_t pfn,
                           xen_pfn_t count)
{
    int page_shift = XC_DOM_PAGE_SHIFT(dom);
    privcmd_mmap_entry_t *entries;
    void *ptr;
    int i, rc;
    int err;

    entries = xc_dom_malloc(dom, count * sizeof(privcmd_mmap_entry_t));
    if ( entries == NULL )
    {
        xc_dom_panic(XC_INTERNAL_ERROR,
                     "%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
                     " [malloc]\n", __FUNCTION__, pfn, count);
        return NULL;
    }

    ptr = mmap(NULL, count << page_shift, PROT_READ | PROT_WRITE,
               MAP_SHARED, dom->guest_xc, 0);
    if ( ptr == MAP_FAILED )
    {
        err = errno;
        xc_dom_panic(XC_INTERNAL_ERROR,
                     "%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
                     " [mmap, errno=%i (%s)]\n", __FUNCTION__, pfn, count,
                     err, strerror(err));
        return NULL;
    }

    for ( i = 0; i < count; i++ )
    {
        entries[i].va = (uintptr_t) ptr + (i << page_shift);
        entries[i].mfn = xc_dom_p2m_host(dom, pfn + i);
        entries[i].npages = 1;
    }

    rc = xc_map_foreign_ranges(dom->guest_xc, dom->guest_domid,
                               entries, count);
    if ( rc < 0 )
    {
        xc_dom_panic(XC_INTERNAL_ERROR,
                     "%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
                     " [xenctl, rc=%d]\n", __FUNCTION__, pfn, count, rc);
        return NULL;
    }
    return ptr;
}

Ejemplo n.º 2

Archivo: xc_dom_boot.c Proyecto: Fantu/Xen

void *xc_dom_boot_domU_map(struct xc_dom_image *dom, xen_pfn_t pfn,
                           xen_pfn_t count)
{
    int page_shift = XC_DOM_PAGE_SHIFT(dom);
    privcmd_mmap_entry_t *entries;
    void *ptr;
    int i;
    int err;

    entries = xc_dom_malloc(dom, count * sizeof(privcmd_mmap_entry_t));
    if ( entries == NULL )
    {
        xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
                     "%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
                     " [malloc]", __FUNCTION__, pfn, count);
        return NULL;
    }

    for ( i = 0; i < count; i++ )
        entries[i].mfn = xc_dom_p2m_host(dom, pfn + i);

    ptr = xc_map_foreign_ranges(dom->xch, dom->guest_domid,
                count << page_shift, PROT_READ | PROT_WRITE, 1 << page_shift,
                entries, count);
    if ( ptr == NULL )
    {
        err = errno;
        xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
                     "%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
                     " [mmap, errno=%i (%s)]", __FUNCTION__, pfn, count,
                     err, strerror(err));
        return NULL;
    }

    return ptr;
}