C++ (Cpp) gnttab_retry_eagain_gop 예제들

예제 #1

파일: grant-table.c 프로젝트: DenisLug/mptcp

int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
		    struct gnttab_map_grant_ref *kmap_ops,
		    struct page **pages, unsigned int count)
{
	int i, ret;

	ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map_ops, count);
	if (ret)
		return ret;

	for (i = 0; i < count; i++) {
		/* Retry eagain maps */
		if (map_ops[i].status == GNTST_eagain)
			gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, map_ops + i,
						&map_ops[i].status, __func__);

		if (map_ops[i].status == GNTST_okay) {
			struct xen_page_foreign *foreign;

			SetPageForeign(pages[i]);
			foreign = xen_page_foreign(pages[i]);
			foreign->domid = map_ops[i].dom;
			foreign->gref = map_ops[i].ref;
		}
	}

	return set_foreign_p2m_mapping(map_ops, kmap_ops, pages, count);
}

예제 #2

파일: grant-table.c 프로젝트: DenisLug/mptcp

void gnttab_batch_copy(struct gnttab_copy *batch, unsigned count)
{
	struct gnttab_copy *op;

	if (HYPERVISOR_grant_table_op(GNTTABOP_copy, batch, count))
		BUG();
	for (op = batch; op < batch + count; op++)
		if (op->status == GNTST_eagain)
			gnttab_retry_eagain_gop(GNTTABOP_copy, op,
						&op->status, __func__);
}

예제 #3

파일: grant-table.c 프로젝트: Niisp/MT6795.kernel

int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
                    struct gnttab_map_grant_ref *kmap_ops,
                    struct page **pages, unsigned int count)
{
    int i, ret;
    bool lazy = false;
    pte_t *pte;
    unsigned long mfn;

    ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map_ops, count);
    if (ret)
        return ret;

    /* Retry eagain maps */
    for (i = 0; i < count; i++)
        if (map_ops[i].status == GNTST_eagain)
            gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, map_ops + i,
                                    &map_ops[i].status, __func__);

    if (xen_feature(XENFEAT_auto_translated_physmap))
        return ret;

    if (!in_interrupt() && paravirt_get_lazy_mode() == PARAVIRT_LAZY_NONE) {
        arch_enter_lazy_mmu_mode();
        lazy = true;
    }

    for (i = 0; i < count; i++) {
        /* Do not add to override if the map failed. */
        if (map_ops[i].status)
            continue;

        if (map_ops[i].flags & GNTMAP_contains_pte) {
            pte = (pte_t *) (mfn_to_virt(PFN_DOWN(map_ops[i].host_addr)) +
                             (map_ops[i].host_addr & ~PAGE_MASK));
            mfn = pte_mfn(*pte);
        } else {
            mfn = PFN_DOWN(map_ops[i].dev_bus_addr);
        }
        ret = m2p_add_override(mfn, pages[i], kmap_ops ?
                               &kmap_ops[i] : NULL);
        if (ret)
            goto out;
    }

out:
    if (lazy)
        arch_leave_lazy_mmu_mode();

    return ret;
}

예제 #4

파일: grant-table.c 프로젝트: 7799/linux

int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
		    struct gnttab_map_grant_ref *kmap_ops,
		    struct page **pages, unsigned int count)
{
	int i, ret;

	ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map_ops, count);
	if (ret)
		return ret;

	/* Retry eagain maps */
	for (i = 0; i < count; i++)
		if (map_ops[i].status == GNTST_eagain)
			gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, map_ops + i,
						&map_ops[i].status, __func__);

	return set_foreign_p2m_mapping(map_ops, kmap_ops, pages, count);
}