[PATCH] KVM: MMU: Make kvm_mmu_alloc_page() return a kvm_mmu_page pointer
This allows further manipulation on the shadow page table.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index 1dcbbd5..da4d7dd 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -292,12 +292,13 @@
return 1;
}
-static hpa_t kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, u64 *parent_pte)
+static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu,
+ u64 *parent_pte)
{
struct kvm_mmu_page *page;
if (list_empty(&vcpu->free_pages))
- return INVALID_PAGE;
+ return NULL;
page = list_entry(vcpu->free_pages.next, struct kvm_mmu_page, link);
list_del(&page->link);
@@ -306,7 +307,7 @@
page->slot_bitmap = 0;
page->global = 1;
page->parent_pte = parent_pte;
- return page->page_hpa;
+ return page;
}
static void page_header_update_slot(struct kvm *kvm, void *pte, gpa_t gpa)
@@ -402,19 +403,16 @@
}
if (table[index] == 0) {
- hpa_t new_table = kvm_mmu_alloc_page(vcpu,
- &table[index]);
+ struct kvm_mmu_page *new_table;
- if (!VALID_PAGE(new_table)) {
+ new_table = kvm_mmu_alloc_page(vcpu, &table[index]);
+ if (!new_table) {
pgprintk("nonpaging_map: ENOMEM\n");
return -ENOMEM;
}
- if (level == PT32E_ROOT_LEVEL)
- table[index] = new_table | PT_PRESENT_MASK;
- else
- table[index] = new_table | PT_PRESENT_MASK |
- PT_WRITABLE_MASK | PT_USER_MASK;
+ table[index] = new_table->page_hpa | PT_PRESENT_MASK
+ | PT_WRITABLE_MASK | PT_USER_MASK;
}
table_addr = table[index] & PT64_BASE_ADDR_MASK;
}
@@ -454,7 +452,7 @@
hpa_t root = vcpu->mmu.root_hpa;
ASSERT(!VALID_PAGE(root));
- root = kvm_mmu_alloc_page(vcpu, NULL);
+ root = kvm_mmu_alloc_page(vcpu, NULL)->page_hpa;
vcpu->mmu.root_hpa = root;
return;
}
@@ -463,7 +461,7 @@
hpa_t root = vcpu->mmu.pae_root[i];
ASSERT(!VALID_PAGE(root));
- root = kvm_mmu_alloc_page(vcpu, NULL);
+ root = kvm_mmu_alloc_page(vcpu, NULL)->page_hpa;
vcpu->mmu.pae_root[i] = root | PT_PRESENT_MASK;
}
vcpu->mmu.root_hpa = __pa(vcpu->mmu.pae_root);