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Subject[PATCH v2 09/13] KVM: x86: pass kvm_mmu_page to gfn_to_rmap
Date
This is always available (with one exception in the auditing code).
Later we will also use the role to look up the right memslots array.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
v1->v2: new

arch/x86/kvm/mmu.c | 10 +++++-----
arch/x86/kvm/mmu_audit.c | 8 ++++++--
2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index deb8862cfd54..6ea24812007a 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -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);
diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c
index 368d53497314..9d99f17aa3be 100644
--- a/arch/x86/kvm/mmu_audit.c
+++ b/arch/x86/kvm/mmu_audit.c
@@ -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))
--
1.8.3.1



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