Exemplo n.º 1
0
int arch_livepatch_quiesce(void)
{
    mfn_t text_mfn;
    unsigned int text_order;

    if ( vmap_of_xen_text )
        return -EINVAL;

    text_mfn = virt_to_mfn(_start);
    text_order = get_order_from_bytes(_end - _start);

    /*
     * The text section is read-only. So re-map Xen to be able to patch
     * the code.
     */
    vmap_of_xen_text = __vmap(&text_mfn, 1U << text_order, 1, 1, PAGE_HYPERVISOR,
                              VMAP_DEFAULT);

    if ( !vmap_of_xen_text )
    {
        printk(XENLOG_ERR LIVEPATCH "Failed to setup vmap of hypervisor! (order=%u)\n",
               text_order);
        return -ENOMEM;
    }

    return 0;
}
Exemplo n.º 2
0
void *vmap(const unsigned long *mfn, unsigned int nr)
{
    return __vmap(mfn, 1, nr, 1, PAGE_HYPERVISOR);
}