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KVM: x86: pass struct kvm_mmu_page to gfn_to_rmap 

This is always available (with one exception in the auditing code),
and with the same auditing exception the level was coming from
sp->role.level.

Later, the spte's role will also be used to look up the right memslots
array.

Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-05-18 15:11:46 +02:00
parent f481b069e6
commit e4cd1da944
2 changed files with 11 additions and 7 deletions
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10
arch/x86/kvm/mmu.c
View File

@ -1043,12 +1043,12 @@ static unsigned long *__gfn_to_rmap(gfn_t gfn, int level,
/*
* Take gfn and return the reverse mapping to it.
*/
static unsigned long *gfn_to_rmap(struct kvm *kvm, gfn_t gfn, int level)
static unsigned long *gfn_to_rmap(struct kvm *kvm, gfn_t gfn, struct kvm_mmu_page *sp)
{
struct kvm_memory_slot *slot;
slot = gfn_to_memslot(kvm, gfn);
return __gfn_to_rmap(gfn, level, slot);
return __gfn_to_rmap(gfn, sp->role.level, slot);
}
static bool rmap_can_add(struct kvm_vcpu *vcpu)
@ -1066,7 +1066,7 @@ static int rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn)
sp = page_header(__pa(spte));
kvm_mmu_page_set_gfn(sp, spte - sp->spt, gfn);
rmapp = gfn_to_rmap(vcpu->kvm, gfn, sp->role.level);
rmapp = gfn_to_rmap(vcpu->kvm, gfn, sp);
return pte_list_add(vcpu, spte, rmapp);
}
@ -1078,7 +1078,7 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
sp = page_header(__pa(spte));
gfn = kvm_mmu_page_get_gfn(sp, spte - sp->spt);
rmapp = gfn_to_rmap(kvm, gfn, sp->role.level);
rmapp = gfn_to_rmap(kvm, gfn, sp);
pte_list_remove(spte, rmapp);
}
@ -1612,7 +1612,7 @@ static void rmap_recycle(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn)
sp = page_header(__pa(spte));
rmapp = gfn_to_rmap(vcpu->kvm, gfn, sp->role.level);
rmapp = gfn_to_rmap(vcpu->kvm, gfn, sp);
kvm_unmap_rmapp(vcpu->kvm, rmapp, NULL, gfn, sp->role.level, 0);
kvm_flush_remote_tlbs(vcpu->kvm);

8
arch/x86/kvm/mmu_audit.c
View File

@ -146,7 +146,7 @@ static void inspect_spte_has_rmap(struct kvm *kvm, u64 *sptep)
return;
}
rmapp = gfn_to_rmap(kvm, gfn, rev_sp->role.level);
rmapp = gfn_to_rmap(kvm, gfn, rev_sp);
if (!*rmapp) {
if (!__ratelimit(&ratelimit_state))
return;
@ -191,11 +191,15 @@ static void audit_write_protection(struct kvm *kvm, struct kvm_mmu_page *sp)
unsigned long *rmapp;
u64 *sptep;
struct rmap_iterator iter;
struct kvm_memslots *slots;
struct kvm_memory_slot *slot;
if (sp->role.direct || sp->unsync || sp->role.invalid)
return;
rmapp = gfn_to_rmap(kvm, sp->gfn, PT_PAGE_TABLE_LEVEL);
slots = kvm_memslots(kvm);
slot = __gfn_to_memslot(slots, sp->gfn);
rmapp = __gfn_to_rmap(sp->gfn, PT_PAGE_TABLE_LEVEL, slot);
for_each_rmap_spte(rmapp, &iter, sptep)
if (is_writable_pte(*sptep))