diff options
| author | Avi Kivity <avi@qumranet.com> | 2007-01-06 01:36:42 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2007-01-06 08:55:24 +0100 |
| commit | 25c0de2cc6c26cb99553c2444936a7951c120c09 (patch) | |
| tree | c2b5bd7ff189a1232ed3a89b50caa2ebbad67634 /drivers/kvm | |
| parent | [PATCH] KVM: MMU: Make the shadow page tables also special-case pae (diff) | |
| download | linux-25c0de2cc6c26cb99553c2444936a7951c120c09.tar.xz linux-25c0de2cc6c26cb99553c2444936a7951c120c09.zip | |
[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>
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/mmu.c | 24 | ||||
| -rw-r--r-- | drivers/kvm/paging_tmpl.h | 6 |
2 files changed, 15 insertions, 15 deletions
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index 1dcbbd511660..da4d7ddb9bdc 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -292,12 +292,13 @@ static int is_empty_shadow_page(hpa_t page_hpa) 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 @@ static hpa_t kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, u64 *parent_pte) 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 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, hpa_t p) } 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 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu) 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 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu) 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); diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h index 7af49ae80e5a..11cac9ddf26a 100644 --- a/drivers/kvm/paging_tmpl.h +++ b/drivers/kvm/paging_tmpl.h @@ -179,6 +179,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, for (; ; level--) { u32 index = SHADOW_PT_INDEX(addr, level); u64 *shadow_ent = ((u64 *)__va(shadow_addr)) + index; + struct kvm_mmu_page *shadow_page; u64 shadow_pte; if (is_present_pte(*shadow_ent) || is_io_pte(*shadow_ent)) { @@ -204,9 +205,10 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr, return shadow_ent; } - shadow_addr = kvm_mmu_alloc_page(vcpu, shadow_ent); - if (!VALID_PAGE(shadow_addr)) + shadow_page = kvm_mmu_alloc_page(vcpu, shadow_ent); + if (!shadow_page) return ERR_PTR(-ENOMEM); + shadow_addr = shadow_page->page_hpa; shadow_pte = shadow_addr | PT_PRESENT_MASK | PT_ACCESSED_MASK | PT_WRITABLE_MASK | PT_USER_MASK; *shadow_ent = shadow_pte; |