Exemplos de gfn_to_pfn_memslot em C++ (Cpp)

Exemplo n.º 1

Arquivo: iommu.c Projeto: 020gzh/linux

static kvm_pfn_t kvm_pin_pages(struct kvm_memory_slot *slot, gfn_t gfn,
			   unsigned long npages)
{
	gfn_t end_gfn;
	kvm_pfn_t pfn;

	pfn     = gfn_to_pfn_memslot(slot, gfn);
	end_gfn = gfn + npages;
	gfn    += 1;

	if (is_error_noslot_pfn(pfn))
		return pfn;

	while (gfn < end_gfn)
		gfn_to_pfn_memslot(slot, gfn++);

	return pfn;
}

Exemplo n.º 2

int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
{
    gfn_t gfn = slot->base_gfn;
    unsigned long npages = slot->npages;
    pfn_t pfn;
    int i, r = 0;
    struct iommu_domain *domain = kvm->arch.iommu_domain;
    int flags;

    /* check if iommu exists and in use */
    if (!domain)
        return 0;

    flags = IOMMU_READ | IOMMU_WRITE;
    if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)
        flags |= IOMMU_CACHE;

    for (i = 0; i < npages; i++) {
        /* check if already mapped */
        if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn)))
            continue;

        pfn = gfn_to_pfn_memslot(kvm, slot, gfn);
        r = iommu_map_range(domain,
                            gfn_to_gpa(gfn),
                            pfn_to_hpa(pfn),
                            PAGE_SIZE, flags);
        if (r) {
            printk(KERN_ERR "kvm_iommu_map_address:"
                   "iommu failed to map pfn=%lx\n", pfn);
            goto unmap_pages;
        }
        gfn++;
    }
    return 0;

unmap_pages:
    kvm_iommu_put_pages(kvm, slot->base_gfn, i);
    return r;
}