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KVM: MMU: Adjust pte accessors to explicitly indicate guest or shadow pte

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Since the guest and host ptes can have wildly different format, adjust
the pte accessor names to indicate on which type of pte they operate on.

No functional changes.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2009-06-10 14:12:05 +03:00
parent 439e218a6f
commit 43a3795a3a
4 changed files with 21 additions and 21 deletions
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16
arch/x86/kvm/mmu.c
View File

@ -240,12 +240,12 @@ static int is_writeble_pte(unsigned long pte)
return pte & PT_WRITABLE_MASK;
}
static int is_dirty_pte(unsigned long pte)
static int is_dirty_gpte(unsigned long pte)
{
return pte & PT_DIRTY_MASK;
}
static int is_rmap_pte(u64 pte)
static int is_rmap_spte(u64 pte)
{
return is_shadow_present_pte(pte);
}
@ -502,7 +502,7 @@ static int rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn, int lpage)
unsigned long *rmapp;
int i, count = 0;
if (!is_rmap_pte(*spte))
if (!is_rmap_spte(*spte))
return count;
gfn = unalias_gfn(vcpu->kvm, gfn);
sp = page_header(__pa(spte));
@ -567,7 +567,7 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
unsigned long *rmapp;
int i;
if (!is_rmap_pte(*spte))
if (!is_rmap_spte(*spte))
return;
sp = page_header(__pa(spte));
pfn = spte_to_pfn(*spte);
@ -1769,7 +1769,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
__func__, *shadow_pte, pt_access,
write_fault, user_fault, gfn);
if (is_rmap_pte(*shadow_pte)) {
if (is_rmap_spte(*shadow_pte)) {
/*
* If we overwrite a PTE page pointer with a 2MB PMD, unlink
* the parent of the now unreachable PTE.
@ -1805,7 +1805,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
page_header_update_slot(vcpu->kvm, shadow_pte, gfn);
if (!was_rmapped) {
rmap_count = rmap_add(vcpu, shadow_pte, gfn, largepage);
if (!is_rmap_pte(*shadow_pte))
if (!is_rmap_spte(*shadow_pte))
kvm_release_pfn_clean(pfn);
if (rmap_count > RMAP_RECYCLE_THRESHOLD)
rmap_recycle(vcpu, gfn, largepage);
@ -1984,7 +1984,7 @@ static int mmu_alloc_roots(struct kvm_vcpu *vcpu)
ASSERT(!VALID_PAGE(root));
if (vcpu->arch.mmu.root_level == PT32E_ROOT_LEVEL) {
pdptr = kvm_pdptr_read(vcpu, i);
if (!is_present_pte(pdptr)) {
if (!is_present_gpte(pdptr)) {
vcpu->arch.mmu.pae_root[i] = 0;
continue;
}
@ -2475,7 +2475,7 @@ static void mmu_guess_page_from_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
if ((bytes == 4) && (gpa % 4 == 0))
memcpy((void *)&gpte, new, 4);
}
if (!is_present_pte(gpte))
if (!is_present_gpte(gpte))
return;
gfn = (gpte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT;

2
arch/x86/kvm/mmu.h
View File

@ -75,7 +75,7 @@ static inline int is_paging(struct kvm_vcpu *vcpu)
return vcpu->arch.cr0 & X86_CR0_PG;
}
static inline int is_present_pte(unsigned long pte)
static inline int is_present_gpte(unsigned long pte)
{
return pte & PT_PRESENT_MASK;
}

22
arch/x86/kvm/paging_tmpl.h
View File

@ -132,7 +132,7 @@ walk:
#if PTTYPE == 64
if (!is_long_mode(vcpu)) {
pte = kvm_pdptr_read(vcpu, (addr >> 30) & 3);
if (!is_present_pte(pte))
if (!is_present_gpte(pte))
goto not_present;
--walker->level;
}
@ -155,7 +155,7 @@ walk:
kvm_read_guest(vcpu->kvm, pte_gpa, &pte, sizeof(pte));
if (!is_present_pte(pte))
if (!is_present_gpte(pte))
goto not_present;
rsvd_fault = is_rsvd_bits_set(vcpu, pte, walker->level);
@ -205,7 +205,7 @@ walk:
--walker->level;
}
if (write_fault && !is_dirty_pte(pte)) {
if (write_fault && !is_dirty_gpte(pte)) {
bool ret;
mark_page_dirty(vcpu->kvm, table_gfn);
@ -252,7 +252,7 @@ static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *page,
gpte = *(const pt_element_t *)pte;
if (~gpte & (PT_PRESENT_MASK | PT_ACCESSED_MASK)) {
if (!is_present_pte(gpte))
if (!is_present_gpte(gpte))
set_shadow_pte(spte, shadow_notrap_nonpresent_pte);
return;
}
@ -289,7 +289,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
pt_element_t curr_pte;
struct kvm_shadow_walk_iterator iterator;
if (!is_present_pte(gw->ptes[gw->level - 1]))
if (!is_present_gpte(gw->ptes[gw->level - 1]))
return NULL;
for_each_shadow_entry(vcpu, addr, iterator) {
@ -318,7 +318,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
if (level == PT_DIRECTORY_LEVEL
&& gw->level == PT_DIRECTORY_LEVEL) {
direct = 1;
if (!is_dirty_pte(gw->ptes[level - 1]))
if (!is_dirty_gpte(gw->ptes[level - 1]))
access &= ~ACC_WRITE_MASK;
table_gfn = gpte_to_gfn(gw->ptes[level - 1]);
} else {
@ -489,7 +489,7 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva)
if (kvm_read_guest_atomic(vcpu->kvm, pte_gpa, &gpte,
sizeof(pt_element_t)))
return;
if (is_present_pte(gpte) && (gpte & PT_ACCESSED_MASK)) {
if (is_present_gpte(gpte) && (gpte & PT_ACCESSED_MASK)) {
if (mmu_topup_memory_caches(vcpu))
return;
kvm_mmu_pte_write(vcpu, pte_gpa, (const u8 *)&gpte,
@ -536,7 +536,7 @@ static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
r = kvm_read_guest_atomic(vcpu->kvm, pte_gpa, pt, sizeof pt);
pte_gpa += ARRAY_SIZE(pt) * sizeof(pt_element_t);
for (j = 0; j < ARRAY_SIZE(pt); ++j)
if (r || is_present_pte(pt[j]))
if (r || is_present_gpte(pt[j]))
sp->spt[i+j] = shadow_trap_nonpresent_pte;
else
sp->spt[i+j] = shadow_notrap_nonpresent_pte;
@ -574,12 +574,12 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
sizeof(pt_element_t)))
return -EINVAL;
if (gpte_to_gfn(gpte) != gfn || !is_present_pte(gpte) ||
if (gpte_to_gfn(gpte) != gfn || !is_present_gpte(gpte) ||
!(gpte & PT_ACCESSED_MASK)) {
u64 nonpresent;
rmap_remove(vcpu->kvm, &sp->spt[i]);
if (is_present_pte(gpte))
if (is_present_gpte(gpte))
nonpresent = shadow_trap_nonpresent_pte;
else
nonpresent = shadow_notrap_nonpresent_pte;
@ -590,7 +590,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
nr_present++;
pte_access = sp->role.access & FNAME(gpte_access)(vcpu, gpte);
set_spte(vcpu, &sp->spt[i], pte_access, 0, 0,
is_dirty_pte(gpte), 0, gfn,
is_dirty_gpte(gpte), 0, gfn,
spte_to_pfn(sp->spt[i]), true, false);
}

2
arch/x86/kvm/x86.c
View File

@ -237,7 +237,7 @@ int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
goto out;
}
for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
if (is_present_pte(pdpte[i]) &&
if (is_present_gpte(pdpte[i]) &&
(pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
ret = 0;
goto out;