Commit e4cd1da9 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

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: default avatarRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent f481b069

arch/x86/kvm/mmu.c

+5 −5
Original line number Diff line number Diff line
@@ -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);

arch/x86/kvm/mmu_audit.c

+6 −2
Original line number Diff line number Diff line
@@ -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))

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