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KVM: MMU: s/shadow_pte/spte/

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We use shadow_pte and spte inconsistently, switch to the shorter spelling.

Rename set_shadow_pte() to __set_spte() to avoid a conflict with the
existing set_spte(), and to indicate its lowlevelness.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2009-06-10 14:24:23 +03:00
parent 43a3795a3a
commit d555c333aa
2 changed files with 59 additions and 59 deletions
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96
arch/x86/kvm/mmu.c
View File

@ -143,7 +143,7 @@ module_param(oos_shadow, bool, 0644);
#define SHADOW_PT_INDEX(addr, level) PT64_INDEX(addr, level)
struct kvm_rmap_desc {
u64 *shadow_ptes[RMAP_EXT];
u64 *sptes[RMAP_EXT];
struct kvm_rmap_desc *more;
};
@ -262,7 +262,7 @@ static gfn_t pse36_gfn_delta(u32 gpte)
return (gpte & PT32_DIR_PSE36_MASK) << shift;
}
static void set_shadow_pte(u64 *sptep, u64 spte)
static void __set_spte(u64 *sptep, u64 spte)
{
#ifdef CONFIG_X86_64
set_64bit((unsigned long *)sptep, spte);
@ -514,23 +514,23 @@ static int rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn, int lpage)
} else if (!(*rmapp & 1)) {
rmap_printk("rmap_add: %p %llx 1->many\n", spte, *spte);
desc = mmu_alloc_rmap_desc(vcpu);
desc->shadow_ptes[0] = (u64 *)*rmapp;
desc->shadow_ptes[1] = spte;
desc->sptes[0] = (u64 *)*rmapp;
desc->sptes[1] = spte;
*rmapp = (unsigned long)desc | 1;
} else {
rmap_printk("rmap_add: %p %llx many->many\n", spte, *spte);
desc = (struct kvm_rmap_desc *)(*rmapp & ~1ul);
while (desc->shadow_ptes[RMAP_EXT-1] && desc->more) {
while (desc->sptes[RMAP_EXT-1] && desc->more) {
desc = desc->more;
count += RMAP_EXT;
}
if (desc->shadow_ptes[RMAP_EXT-1]) {
if (desc->sptes[RMAP_EXT-1]) {
desc->more = mmu_alloc_rmap_desc(vcpu);
desc = desc->more;
}
for (i = 0; desc->shadow_ptes[i]; ++i)
for (i = 0; desc->sptes[i]; ++i)
;
desc->shadow_ptes[i] = spte;
desc->sptes[i] = spte;
}
return count;
}
@ -542,14 +542,14 @@ static void rmap_desc_remove_entry(unsigned long *rmapp,
{
int j;
for (j = RMAP_EXT - 1; !desc->shadow_ptes[j] && j > i; --j)
for (j = RMAP_EXT - 1; !desc->sptes[j] && j > i; --j)
;
desc->shadow_ptes[i] = desc->shadow_ptes[j];
desc->shadow_ptes[j] = NULL;
desc->sptes[i] = desc->sptes[j];
desc->sptes[j] = NULL;
if (j != 0)
return;
if (!prev_desc && !desc->more)
*rmapp = (unsigned long)desc->shadow_ptes[0];
*rmapp = (unsigned long)desc->sptes[0];
else
if (prev_desc)
prev_desc->more = desc->more;
@ -594,8 +594,8 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
desc = (struct kvm_rmap_desc *)(*rmapp & ~1ul);
prev_desc = NULL;
while (desc) {
for (i = 0; i < RMAP_EXT && desc->shadow_ptes[i]; ++i)
if (desc->shadow_ptes[i] == spte) {
for (i = 0; i < RMAP_EXT && desc->sptes[i]; ++i)
if (desc->sptes[i] == spte) {
rmap_desc_remove_entry(rmapp,
desc, i,
prev_desc);
@ -626,10 +626,10 @@ static u64 *rmap_next(struct kvm *kvm, unsigned long *rmapp, u64 *spte)
prev_desc = NULL;
prev_spte = NULL;
while (desc) {
for (i = 0; i < RMAP_EXT && desc->shadow_ptes[i]; ++i) {
for (i = 0; i < RMAP_EXT && desc->sptes[i]; ++i) {
if (prev_spte == spte)
return desc->shadow_ptes[i];
prev_spte = desc->shadow_ptes[i];
return desc->sptes[i];
prev_spte = desc->sptes[i];
}
desc = desc->more;
}
@ -651,7 +651,7 @@ static int rmap_write_protect(struct kvm *kvm, u64 gfn)
BUG_ON(!(*spte & PT_PRESENT_MASK));
rmap_printk("rmap_write_protect: spte %p %llx\n", spte, *spte);
if (is_writeble_pte(*spte)) {
set_shadow_pte(spte, *spte & ~PT_WRITABLE_MASK);
__set_spte(spte, *spte & ~PT_WRITABLE_MASK);
write_protected = 1;
}
spte = rmap_next(kvm, rmapp, spte);
@ -675,7 +675,7 @@ static int rmap_write_protect(struct kvm *kvm, u64 gfn)
if (is_writeble_pte(*spte)) {
rmap_remove(kvm, spte);
--kvm->stat.lpages;
set_shadow_pte(spte, shadow_trap_nonpresent_pte);
__set_spte(spte, shadow_trap_nonpresent_pte);
spte = NULL;
write_protected = 1;
}
@ -694,7 +694,7 @@ static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp)
BUG_ON(!(*spte & PT_PRESENT_MASK));
rmap_printk("kvm_rmap_unmap_hva: spte %p %llx\n", spte, *spte);
rmap_remove(kvm, spte);
set_shadow_pte(spte, shadow_trap_nonpresent_pte);
__set_spte(spte, shadow_trap_nonpresent_pte);
need_tlb_flush = 1;
}
return need_tlb_flush;
@ -1369,7 +1369,7 @@ static void kvm_mmu_unlink_parents(struct kvm *kvm, struct kvm_mmu_page *sp)
}
BUG_ON(!parent_pte);
kvm_mmu_put_page(sp, parent_pte);
set_shadow_pte(parent_pte, shadow_trap_nonpresent_pte);
__set_spte(parent_pte, shadow_trap_nonpresent_pte);
}
}
@ -1517,7 +1517,7 @@ static void mmu_convert_notrap(struct kvm_mmu_page *sp)
for (i = 0; i < PT64_ENT_PER_PAGE; ++i) {
if (pt[i] == shadow_notrap_nonpresent_pte)
set_shadow_pte(&pt[i], shadow_trap_nonpresent_pte);
__set_spte(&pt[i], shadow_trap_nonpresent_pte);
}
}
@ -1683,7 +1683,7 @@ static int mmu_need_write_protect(struct kvm_vcpu *vcpu, gfn_t gfn,
return 0;
}
static int set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
unsigned pte_access, int user_fault,
int write_fault, int dirty, int largepage,
gfn_t gfn, pfn_t pfn, bool speculative,
@ -1733,7 +1733,7 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
* is responsibility of mmu_get_page / kvm_sync_page.
* Same reasoning can be applied to dirty page accounting.
*/
if (!can_unsync && is_writeble_pte(*shadow_pte))
if (!can_unsync && is_writeble_pte(*sptep))
goto set_pte;
if (mmu_need_write_protect(vcpu, gfn, can_unsync)) {
@ -1750,62 +1750,62 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
mark_page_dirty(vcpu->kvm, gfn);
set_pte:
set_shadow_pte(shadow_pte, spte);
__set_spte(sptep, spte);
return ret;
}
static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
unsigned pt_access, unsigned pte_access,
int user_fault, int write_fault, int dirty,
int *ptwrite, int largepage, gfn_t gfn,
pfn_t pfn, bool speculative)
{
int was_rmapped = 0;
int was_writeble = is_writeble_pte(*shadow_pte);
int was_writeble = is_writeble_pte(*sptep);
int rmap_count;
pgprintk("%s: spte %llx access %x write_fault %d"
" user_fault %d gfn %lx\n",
__func__, *shadow_pte, pt_access,
__func__, *sptep, pt_access,
write_fault, user_fault, gfn);
if (is_rmap_spte(*shadow_pte)) {
if (is_rmap_spte(*sptep)) {
/*
* If we overwrite a PTE page pointer with a 2MB PMD, unlink
* the parent of the now unreachable PTE.
*/
if (largepage && !is_large_pte(*shadow_pte)) {
if (largepage && !is_large_pte(*sptep)) {
struct kvm_mmu_page *child;
u64 pte = *shadow_pte;
u64 pte = *sptep;
child = page_header(pte & PT64_BASE_ADDR_MASK);
mmu_page_remove_parent_pte(child, shadow_pte);
} else if (pfn != spte_to_pfn(*shadow_pte)) {
mmu_page_remove_parent_pte(child, sptep);
} else if (pfn != spte_to_pfn(*sptep)) {
pgprintk("hfn old %lx new %lx\n",
spte_to_pfn(*shadow_pte), pfn);
rmap_remove(vcpu->kvm, shadow_pte);
spte_to_pfn(*sptep), pfn);
rmap_remove(vcpu->kvm, sptep);
} else
was_rmapped = 1;
}
if (set_spte(vcpu, shadow_pte, pte_access, user_fault, write_fault,
if (set_spte(vcpu, sptep, pte_access, user_fault, write_fault,
dirty, largepage, gfn, pfn, speculative, true)) {
if (write_fault)
*ptwrite = 1;
kvm_x86_ops->tlb_flush(vcpu);
}
pgprintk("%s: setting spte %llx\n", __func__, *shadow_pte);
pgprintk("%s: setting spte %llx\n", __func__, *sptep);
pgprintk("instantiating %s PTE (%s) at %ld (%llx) addr %p\n",
is_large_pte(*shadow_pte)? "2MB" : "4kB",
is_present_pte(*shadow_pte)?"RW":"R", gfn,
*shadow_pte, shadow_pte);
if (!was_rmapped && is_large_pte(*shadow_pte))
is_large_pte(*sptep)? "2MB" : "4kB",
is_present_pte(*sptep)?"RW":"R", gfn,
*shadow_pte, sptep);
if (!was_rmapped && is_large_pte(*sptep))
++vcpu->kvm->stat.lpages;
page_header_update_slot(vcpu->kvm, shadow_pte, gfn);
page_header_update_slot(vcpu->kvm, sptep, gfn);
if (!was_rmapped) {
rmap_count = rmap_add(vcpu, shadow_pte, gfn, largepage);
if (!is_rmap_spte(*shadow_pte))
rmap_count = rmap_add(vcpu, sptep, gfn, largepage);
if (!is_rmap_spte(*sptep))
kvm_release_pfn_clean(pfn);
if (rmap_count > RMAP_RECYCLE_THRESHOLD)
rmap_recycle(vcpu, gfn, largepage);
@ -1816,7 +1816,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
kvm_release_pfn_clean(pfn);
}
if (speculative) {
vcpu->arch.last_pte_updated = shadow_pte;
vcpu->arch.last_pte_updated = sptep;
vcpu->arch.last_pte_gfn = gfn;
}
}
@ -1854,7 +1854,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
return -ENOMEM;
}
set_shadow_pte(iterator.sptep,
__set_spte(iterator.sptep,
__pa(sp->spt)
| PT_PRESENT_MASK | PT_WRITABLE_MASK
| shadow_user_mask | shadow_x_mask);
@ -2389,7 +2389,7 @@ static void mmu_pte_write_zap_pte(struct kvm_vcpu *vcpu,
mmu_page_remove_parent_pte(child, spte);
}
}
set_shadow_pte(spte, shadow_trap_nonpresent_pte);
__set_spte(spte, shadow_trap_nonpresent_pte);
if (is_large_pte(pte))
--vcpu->kvm->stat.lpages;
}
@ -3125,7 +3125,7 @@ static int count_rmaps(struct kvm_vcpu *vcpu)
d = (struct kvm_rmap_desc *)(*rmapp & ~1ul);
while (d) {
for (k = 0; k < RMAP_EXT; ++k)
if (d->shadow_ptes[k])
if (d->sptes[k])
++nmaps;
else
break;

14
arch/x86/kvm/paging_tmpl.h
View File

@ -253,7 +253,7 @@ 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_gpte(gpte))
set_shadow_pte(spte, shadow_notrap_nonpresent_pte);
__set_spte(spte, shadow_notrap_nonpresent_pte);
return;
}
pgprintk("%s: gpte %llx spte %p\n", __func__, (u64)gpte, spte);
@ -311,7 +311,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
if (is_large_pte(*sptep)) {
rmap_remove(vcpu->kvm, sptep);
set_shadow_pte(sptep, shadow_trap_nonpresent_pte);
__set_spte(sptep, shadow_trap_nonpresent_pte);
kvm_flush_remote_tlbs(vcpu->kvm);
}
@ -369,7 +369,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
int user_fault = error_code & PFERR_USER_MASK;
int fetch_fault = error_code & PFERR_FETCH_MASK;
struct guest_walker walker;
u64 *shadow_pte;
u64 *sptep;
int write_pt = 0;
int r;
pfn_t pfn;
@ -422,11 +422,11 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
if (mmu_notifier_retry(vcpu, mmu_seq))
goto out_unlock;
kvm_mmu_free_some_pages(vcpu);
shadow_pte = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault,
sptep = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault,
largepage, &write_pt, pfn);
pgprintk("%s: shadow pte %p %llx ptwrite %d\n", __func__,
shadow_pte, *shadow_pte, write_pt);
sptep, *sptep, write_pt);
if (!write_pt)
vcpu->arch.last_pt_write_count = 0; /* reset fork detector */
@ -472,7 +472,7 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva)
--vcpu->kvm->stat.lpages;
need_flush = 1;
}
set_shadow_pte(sptep, shadow_trap_nonpresent_pte);
__set_spte(sptep, shadow_trap_nonpresent_pte);
break;
}
@ -583,7 +583,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
nonpresent = shadow_trap_nonpresent_pte;
else
nonpresent = shadow_notrap_nonpresent_pte;
set_shadow_pte(&sp->spt[i], nonpresent);
__set_spte(&sp->spt[i], nonpresent);
continue;
}