提交 f6e2c02b 编写于 作者: A Avi Kivity

KVM: MMU: Rename "metaphysical" attribute to "direct"

This actually describes what is going on, rather than alerting the reader
that something strange is going on.
Signed-off-by: NAvi Kivity <avi@redhat.com>
上级 9903a927
......@@ -170,7 +170,8 @@ struct kvm_pte_chain {
* bits 0:3 - total guest paging levels (2-4, or zero for real mode)
* bits 4:7 - page table level for this shadow (1-4)
* bits 8:9 - page table quadrant for 2-level guests
* bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
* bit 16 - direct mapping of virtual to physical mapping at gfn
* used for real mode and two-dimensional paging
* bits 17:19 - common access permissions for all ptes in this shadow page
*/
union kvm_mmu_page_role {
......@@ -180,7 +181,7 @@ union kvm_mmu_page_role {
unsigned level:4;
unsigned quadrant:2;
unsigned pad_for_nice_hex_output:6;
unsigned metaphysical:1;
unsigned direct:1;
unsigned access:3;
unsigned invalid:1;
unsigned cr4_pge:1;
......
......@@ -1066,7 +1066,7 @@ static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm, gfn_t gfn)
index = kvm_page_table_hashfn(gfn);
bucket = &kvm->arch.mmu_page_hash[index];
hlist_for_each_entry(sp, node, bucket, hash_link)
if (sp->gfn == gfn && !sp->role.metaphysical
if (sp->gfn == gfn && !sp->role.direct
&& !sp->role.invalid) {
pgprintk("%s: found role %x\n",
__func__, sp->role.word);
......@@ -1200,7 +1200,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
gfn_t gfn,
gva_t gaddr,
unsigned level,
int metaphysical,
int direct,
unsigned access,
u64 *parent_pte)
{
......@@ -1213,7 +1213,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
role = vcpu->arch.mmu.base_role;
role.level = level;
role.metaphysical = metaphysical;
role.direct = direct;
role.access = access;
if (vcpu->arch.mmu.root_level <= PT32_ROOT_LEVEL) {
quadrant = gaddr >> (PAGE_SHIFT + (PT64_PT_BITS * level));
......@@ -1250,7 +1250,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
sp->role = role;
sp->global = role.cr4_pge;
hlist_add_head(&sp->hash_link, bucket);
if (!metaphysical) {
if (!direct) {
if (rmap_write_protect(vcpu->kvm, gfn))
kvm_flush_remote_tlbs(vcpu->kvm);
account_shadowed(vcpu->kvm, gfn);
......@@ -1395,7 +1395,7 @@ static int kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp)
kvm_mmu_page_unlink_children(kvm, sp);
kvm_mmu_unlink_parents(kvm, sp);
kvm_flush_remote_tlbs(kvm);
if (!sp->role.invalid && !sp->role.metaphysical)
if (!sp->role.invalid && !sp->role.direct)
unaccount_shadowed(kvm, sp->gfn);
if (sp->unsync)
kvm_unlink_unsync_page(kvm, sp);
......@@ -1458,7 +1458,7 @@ static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn)
index = kvm_page_table_hashfn(gfn);
bucket = &kvm->arch.mmu_page_hash[index];
hlist_for_each_entry_safe(sp, node, n, bucket, hash_link)
if (sp->gfn == gfn && !sp->role.metaphysical) {
if (sp->gfn == gfn && !sp->role.direct) {
pgprintk("%s: gfn %lx role %x\n", __func__, gfn,
sp->role.word);
r = 1;
......@@ -1478,7 +1478,7 @@ static void mmu_unshadow(struct kvm *kvm, gfn_t gfn)
index = kvm_page_table_hashfn(gfn);
bucket = &kvm->arch.mmu_page_hash[index];
hlist_for_each_entry_safe(sp, node, nn, bucket, hash_link) {
if (sp->gfn == gfn && !sp->role.metaphysical
if (sp->gfn == gfn && !sp->role.direct
&& !sp->role.invalid) {
pgprintk("%s: zap %lx %x\n",
__func__, gfn, sp->role.word);
......@@ -1638,7 +1638,7 @@ static int kvm_unsync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
bucket = &vcpu->kvm->arch.mmu_page_hash[index];
/* don't unsync if pagetable is shadowed with multiple roles */
hlist_for_each_entry_safe(s, node, n, bucket, hash_link) {
if (s->gfn != sp->gfn || s->role.metaphysical)
if (s->gfn != sp->gfn || s->role.direct)
continue;
if (s->role.word != sp->role.word)
return 1;
......@@ -1951,7 +1951,7 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu)
int i;
gfn_t root_gfn;
struct kvm_mmu_page *sp;
int metaphysical = 0;
int direct = 0;
root_gfn = vcpu->arch.cr3 >> PAGE_SHIFT;
......@@ -1960,18 +1960,18 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu)
ASSERT(!VALID_PAGE(root));
if (tdp_enabled)
metaphysical = 1;
direct = 1;
sp = kvm_mmu_get_page(vcpu, root_gfn, 0,
PT64_ROOT_LEVEL, metaphysical,
PT64_ROOT_LEVEL, direct,
ACC_ALL, NULL);
root = __pa(sp->spt);
++sp->root_count;
vcpu->arch.mmu.root_hpa = root;
return;
}
metaphysical = !is_paging(vcpu);
direct = !is_paging(vcpu);
if (tdp_enabled)
metaphysical = 1;
direct = 1;
for (i = 0; i < 4; ++i) {
hpa_t root = vcpu->arch.mmu.pae_root[i];
......@@ -1985,7 +1985,7 @@ static void mmu_alloc_roots(struct kvm_vcpu *vcpu)
} else if (vcpu->arch.mmu.root_level == 0)
root_gfn = 0;
sp = kvm_mmu_get_page(vcpu, root_gfn, i << 30,
PT32_ROOT_LEVEL, metaphysical,
PT32_ROOT_LEVEL, direct,
ACC_ALL, NULL);
root = __pa(sp->spt);
++sp->root_count;
......@@ -2487,7 +2487,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
index = kvm_page_table_hashfn(gfn);
bucket = &vcpu->kvm->arch.mmu_page_hash[index];
hlist_for_each_entry_safe(sp, node, n, bucket, hash_link) {
if (sp->gfn != gfn || sp->role.metaphysical || sp->role.invalid)
if (sp->gfn != gfn || sp->role.direct || sp->role.invalid)
continue;
pte_size = sp->role.glevels == PT32_ROOT_LEVEL ? 4 : 8;
misaligned = (offset ^ (offset + bytes - 1)) & ~(pte_size - 1);
......@@ -3125,7 +3125,7 @@ static void audit_write_protection(struct kvm_vcpu *vcpu)
gfn_t gfn;
list_for_each_entry(sp, &vcpu->kvm->arch.active_mmu_pages, link) {
if (sp->role.metaphysical)
if (sp->role.direct)
continue;
gfn = unalias_gfn(vcpu->kvm, sp->gfn);
......
......@@ -277,7 +277,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
unsigned access = gw->pt_access;
struct kvm_mmu_page *shadow_page;
u64 spte, *sptep;
int metaphysical;
int direct;
gfn_t table_gfn;
int r;
int level;
......@@ -313,17 +313,17 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
if (level == PT_DIRECTORY_LEVEL
&& gw->level == PT_DIRECTORY_LEVEL) {
metaphysical = 1;
direct = 1;
if (!is_dirty_pte(gw->ptes[level - 1]))
access &= ~ACC_WRITE_MASK;
table_gfn = gpte_to_gfn(gw->ptes[level - 1]);
} else {
metaphysical = 0;
direct = 0;
table_gfn = gw->table_gfn[level - 2];
}
shadow_page = kvm_mmu_get_page(vcpu, table_gfn, addr, level-1,
metaphysical, access, sptep);
if (!metaphysical) {
direct, access, sptep);
if (!direct) {
r = kvm_read_guest_atomic(vcpu->kvm,
gw->pte_gpa[level - 2],
&curr_pte, sizeof(curr_pte));
......@@ -512,7 +512,7 @@ static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
pt_element_t pt[256 / sizeof(pt_element_t)];
gpa_t pte_gpa;
if (sp->role.metaphysical
if (sp->role.direct
|| (PTTYPE == 32 && sp->role.level > PT_PAGE_TABLE_LEVEL)) {
nonpaging_prefetch_page(vcpu, sp);
return;
......
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