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KVM: modify memslots layout in struct kvm

Browse source 
Have a pointer to an allocated region inside struct kvm.

[alex: fix ppc book 3s]

Signed-off-by: Alexander Graf <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>
This commit is contained in:
Marcelo Tosatti 2009-12-23 14:35:16 -02:00
commit 46a26bf557
8 changed files with 60 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

18
virt/kvm/iommu.c
View file

@ -76,10 +76,13 @@ unmap_pages:
static int kvm_iommu_map_memslots(struct kvm *kvm)
{
int i, r = 0;
struct kvm_memslots *slots;
for (i = 0; i < kvm->nmemslots; i++) {
r = kvm_iommu_map_pages(kvm, kvm->memslots[i].base_gfn,
kvm->memslots[i].npages);
slots = kvm->memslots;
for (i = 0; i < slots->nmemslots; i++) {
r = kvm_iommu_map_pages(kvm, slots->memslots[i].base_gfn,
slots->memslots[i].npages);
if (r)
break;
}
@ -210,10 +213,13 @@ static void kvm_iommu_put_pages(struct kvm *kvm,
static int kvm_iommu_unmap_memslots(struct kvm *kvm)
{
int i;
struct kvm_memslots *slots;
for (i = 0; i < kvm->nmemslots; i++) {
kvm_iommu_put_pages(kvm, kvm->memslots[i].base_gfn,
kvm->memslots[i].npages);
slots = kvm->memslots;
for (i = 0; i < slots->nmemslots; i++) {
kvm_iommu_put_pages(kvm, slots->memslots[i].base_gfn,
slots->memslots[i].npages);
}
return 0;

36
virt/kvm/kvm_main.c
View file

@ -375,12 +375,16 @@ static struct kvm *kvm_create_vm(void)
INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list);
#endif
r = -ENOMEM;
kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
if (!kvm->memslots)
goto out_err;
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (!page) {
r = -ENOMEM;
if (!page)
goto out_err;
}
kvm->coalesced_mmio_ring =
(struct kvm_coalesced_mmio_ring *)page_address(page);
#endif
@ -416,6 +420,7 @@ out:
out_err:
hardware_disable_all();
out_err_nodisable:
kfree(kvm->memslots);
kfree(kvm);
return ERR_PTR(r);
}
@ -450,9 +455,12 @@ static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
void kvm_free_physmem(struct kvm *kvm)
{
int i;
struct kvm_memslots *slots = kvm->memslots;
for (i = 0; i < kvm->nmemslots; ++i)
kvm_free_physmem_slot(&kvm->memslots[i], NULL);
for (i = 0; i < slots->nmemslots; ++i)
kvm_free_physmem_slot(&slots->memslots[i], NULL);
kfree(kvm->memslots);
}
static void kvm_destroy_vm(struct kvm *kvm)
@ -533,7 +541,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
goto out;
memslot = &kvm->memslots[mem->slot];
memslot = &kvm->memslots->memslots[mem->slot];
base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
npages = mem->memory_size >> PAGE_SHIFT;
@ -554,7 +562,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
/* Check for overlaps */
r = -EEXIST;
for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
struct kvm_memory_slot *s = &kvm->memslots[i];
struct kvm_memory_slot *s = &kvm->memslots->memslots[i];
if (s == memslot || !s->npages)
continue;
@ -656,8 +664,8 @@ skip_lpage:
kvm_arch_flush_shadow(kvm);
spin_lock(&kvm->mmu_lock);
if (mem->slot >= kvm->nmemslots)
kvm->nmemslots = mem->slot + 1;
if (mem->slot >= kvm->memslots->nmemslots)
kvm->memslots->nmemslots = mem->slot + 1;
*memslot = new;
spin_unlock(&kvm->mmu_lock);
@ -727,7 +735,7 @@ int kvm_get_dirty_log(struct kvm *kvm,
if (log->slot >= KVM_MEMORY_SLOTS)
goto out;
memslot = &kvm->memslots[log->slot];
memslot = &kvm->memslots->memslots[log->slot];
r = -ENOENT;
if (!memslot->dirty_bitmap)
goto out;
@ -781,9 +789,10 @@ EXPORT_SYMBOL_GPL(kvm_is_error_hva);
struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn)
{
int i;
struct kvm_memslots *slots = kvm->memslots;
for (i = 0; i < kvm->nmemslots; ++i) {
struct kvm_memory_slot *memslot = &kvm->memslots[i];
for (i = 0; i < slots->nmemslots; ++i) {
struct kvm_memory_slot *memslot = &slots->memslots[i];
if (gfn >= memslot->base_gfn
&& gfn < memslot->base_gfn + memslot->npages)
@ -802,10 +811,11 @@ struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
{
int i;
struct kvm_memslots *slots = kvm->memslots;
gfn = unalias_gfn(kvm, gfn);
for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
struct kvm_memory_slot *memslot = &kvm->memslots[i];
struct kvm_memory_slot *memslot = &slots->memslots[i];
if (gfn >= memslot->base_gfn
&& gfn < memslot->base_gfn + memslot->npages)