static void inspect_spte_has_rmap(struct vm *pvm, u64 *sptep)
{
static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10);
unsigned long *rmapp;
struct vmmr0_mmu_page *rev_sp;
gfn_t gfn;
rev_sp = page_header(__pa(sptep));
#ifdef HOST_LINUX_OPTIMIZED
gfn = vmmr0_mmu_page_get_gfn(rev_sp, sptep - rev_sp->spt);
#else
gfn = vmmr0_mmu_page_get_gfn(rev_sp, (u64*)__pa(sptep) - (u64*)__pa(rev_sp->spt));
#endif
if (!mmu_gfn_to_memslot(vmmr0, gfn)) {
if (!__ratelimit(&ratelimit_state))
return;
audit_printk(vmmr0, "no memslot for gfn %llx\n", gfn);
audit_printk(vmmr0, "index %ld of sp (gfn=%llx)\n",
(long int)(sptep - rev_sp->spt), rev_sp->gfn);
dump_stack();
return;
}
rmapp = gfn_to_rmap(vmmr0, gfn, rev_sp->role.level);
if (!*rmapp) {
if (!__ratelimit(&ratelimit_state))
return;
audit_printk(vmmr0, "no rmap for writable spte %llx\n",
*sptep);
dump_stack();
}
}
static void audit_mappings(struct kvm_vcpu *vcpu, u64 *sptep, int level)
{
struct kvm_mmu_page *sp;
gfn_t gfn;
pfn_t pfn;
hpa_t hpa;
sp = page_header(__pa(sptep));
if (sp->unsync) {
if (level != PT_PAGE_TABLE_LEVEL) {
audit_printk(vcpu->kvm, "unsync sp: %p "
"level = %d\n", sp, level);
return;
}
}
if (!is_shadow_present_pte(*sptep) || !is_last_spte(*sptep, level))
return;
gfn = kvm_mmu_page_get_gfn(sp, sptep - sp->spt);
pfn = gfn_to_pfn_atomic(vcpu->kvm, gfn);
if (is_error_pfn(pfn)) {
kvm_release_pfn_clean(pfn);
return;
}
hpa = pfn << PAGE_SHIFT;
if ((*sptep & PT64_BASE_ADDR_MASK) != hpa)
audit_printk(vcpu->kvm, "levels %d pfn %llx hpa %llx "
"ent %llxn", vcpu->arch.mmu.root_level, pfn,
hpa, *sptep);
}
static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
{
unsigned long *rmapp;
struct kvm_mmu_page *rev_sp;
gfn_t gfn;
rev_sp = page_header(__pa(sptep));
gfn = kvm_mmu_page_get_gfn(rev_sp, sptep - rev_sp->spt);
if (!gfn_to_memslot(kvm, gfn)) {
if (!printk_ratelimit())
return;
audit_printk(kvm, "no memslot for gfn %llx\n", gfn);
audit_printk(kvm, "index %ld of sp (gfn=%llx)\n",
(long int)(sptep - rev_sp->spt), rev_sp->gfn);
dump_stack();
return;
}
rmapp = gfn_to_rmap(kvm, gfn, rev_sp->role.level);
if (!*rmapp) {
if (!printk_ratelimit())
return;
audit_printk(kvm, "no rmap for writable spte %llx\n",
*sptep);
dump_stack();
}
}
static void audit_spte_after_sync(struct vmmr0_vcpu *vcpu, u64 *sptep, int level)
{
struct vmmr0_mmu_page *sp = page_header(__pa(sptep));
if (vcpu->vmmr0->arch.audit_point == AUDIT_POST_SYNC && sp->unsync)
audit_printk(vcpu->vmmr0, "meet unsync sp(%p) after sync "
"root.\n", sp);
}
static void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp)
{
unsigned long *rmapp;
u64 *sptep;
struct rmap_iterator iter;
if (sp->role.direct || sp->unsync || sp->role.invalid)
return;
rmapp = gfn_to_rmap(kvm, sp->gfn, PT_PAGE_TABLE_LEVEL);
for (sptep = rmap_get_first(*rmapp, &iter); sptep;
sptep = rmap_get_next(&iter)) {
if (is_writable_pte(*sptep))
audit_printk(kvm, "shadow page has writable "
"mappings: gfn %llx role %x\n",
sp->gfn, sp->role.word);
}
}
static void audit_write_protection(struct vm *pvm, struct vmmr0_mmu_page *sp)
{
struct vmmr0_memory_slot *slot;
unsigned long *rmapp;
u64 *spte;
if (sp->role.direct || sp->unsync || sp->role.invalid)
return;
slot = mmu_gfn_to_memslot(vmmr0, sp->gfn);
rmapp = &slot->rmap[sp->gfn - slot->base_gfn];
spte = rmap_next(rmapp, NULL);
while (spte) {
if (is_writable_pte(*spte))
audit_printk(vmmr0, "shadow page has writable "
"mappings: gfn %llx role %x\n",
sp->gfn, sp->role.word);
spte = rmap_next(rmapp, spte);
}
}
static void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp)
{
struct kvm_memory_slot *slot;
unsigned long *rmapp;
u64 *sptep;
struct rmap_iterator iter;
if (sp->role.direct || sp->unsync || sp->role.invalid)
return;
slot = gfn_to_memslot(kvm, sp->gfn);
rmapp = &slot->rmap[sp->gfn - slot->base_gfn];
for (sptep = rmap_get_first(*rmapp, &iter); sptep;
sptep = rmap_get_next(&iter)) {
if (is_writable_pte(*sptep))
audit_printk(kvm, "shadow page has writable "
"mappings: gfn %llx role %x\n",
sp->gfn, sp->role.word);
}
}
