Date:   Thu,  2 Feb 2023 18:28:03 +0000
In-Reply-To: <20230202182809.1929122-1-bgardon@google.com>
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References: <20230202182809.1929122-1-bgardon@google.com>
Message-ID: <20230202182809.1929122-16-bgardon@google.com>
Subject: [PATCH 15/21] KVM: x86/MMU: Remove unneeded exports from shadow_mmu.c
From:   Ben Gardon <bgardon@google.com>
To:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc:     Paolo Bonzini <pbonzini@redhat.com>, Peter Xu <peterx@redhat.com>,
        Sean Christopherson <seanjc@google.com>,
        David Matlack <dmatlack@google.com>,
        Vipin Sharma <vipinsh@google.com>,
        Ricardo Koller <ricarkol@google.com>,
        Ben Gardon <bgardon@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Now that the various dirty logging / wrprot function implementations are
in shadow_mmu.c, do another round of cleanups to remove functions which
no longer need to be exposed and can be marked static.

No functional change intended.

Signed-off-by: Ben Gardon <bgardon@google.com>
---
 arch/x86/kvm/mmu/shadow_mmu.c | 32 +++++++++++++++++++-------------
 arch/x86/kvm/mmu/shadow_mmu.h | 18 ------------------
 2 files changed, 19 insertions(+), 31 deletions(-)

diff --git a/arch/x86/kvm/mmu/shadow_mmu.c b/arch/x86/kvm/mmu/shadow_mmu.c
index b93a6174717d3..dc5c4b9899cc6 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.c
+++ b/arch/x86/kvm/mmu/shadow_mmu.c
@@ -634,8 +634,8 @@ unsigned int pte_list_count(struct kvm_rmap_head *rmap_head)
 	return count;
 }
 
-struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
-				  const struct kvm_memory_slot *slot)
+static struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
+					 const struct kvm_memory_slot *slot)
 {
 	unsigned long idx;
 
@@ -803,7 +803,7 @@ static bool spte_write_protect(u64 *sptep, bool pt_protect)
 	return mmu_spte_update(sptep, spte);
 }
 
-bool rmap_write_protect(struct kvm_rmap_head *rmap_head, bool pt_protect)
+static bool rmap_write_protect(struct kvm_rmap_head *rmap_head, bool pt_protect)
 {
 	u64 *sptep;
 	struct rmap_iterator iter;
@@ -842,8 +842,8 @@ static bool spte_wrprot_for_clear_dirty(u64 *sptep)
  *	- W bit on ad-disabled SPTEs.
  * Returns true iff any D or W bits were cleared.
  */
-bool __rmap_clear_dirty(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
-			const struct kvm_memory_slot *slot)
+static bool __rmap_clear_dirty(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
+			       const struct kvm_memory_slot *slot)
 {
 	u64 *sptep;
 	struct rmap_iterator iter;
@@ -3057,6 +3057,11 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
 	write_unlock(&vcpu->kvm->mmu_lock);
 }
 
+/* The return value indicates if tlb flush on all vcpus is needed. */
+typedef bool (*slot_rmaps_handler) (struct kvm *kvm,
+				    struct kvm_rmap_head *rmap_head,
+				    const struct kvm_memory_slot *slot);
+
 static __always_inline bool __walk_slot_rmaps(struct kvm *kvm,
 					      const struct kvm_memory_slot *slot,
 					      slot_rmaps_handler fn,
@@ -3087,20 +3092,21 @@ static __always_inline bool __walk_slot_rmaps(struct kvm *kvm,
 	return flush;
 }
 
-__always_inline bool walk_slot_rmaps(struct kvm *kvm,
-				     const struct kvm_memory_slot *slot,
-				     slot_rmaps_handler fn, int start_level,
-				     int end_level, bool flush_on_yield)
+static __always_inline bool walk_slot_rmaps(struct kvm *kvm,
+					    const struct kvm_memory_slot *slot,
+					    slot_rmaps_handler fn,
+					    int start_level, int end_level,
+					    bool flush_on_yield)
 {
 	return __walk_slot_rmaps(kvm, slot, fn, start_level, end_level,
 				 slot->base_gfn, slot->base_gfn + slot->npages - 1,
 				 flush_on_yield, false);
 }
 
-__always_inline bool walk_slot_rmaps_4k(struct kvm *kvm,
-					const struct kvm_memory_slot *slot,
-					slot_rmaps_handler fn,
-					bool flush_on_yield)
+static __always_inline bool walk_slot_rmaps_4k(struct kvm *kvm,
+					       const struct kvm_memory_slot *slot,
+					       slot_rmaps_handler fn,
+					       bool flush_on_yield)
 {
 	return walk_slot_rmaps(kvm, slot, fn, PG_LEVEL_4K,
 			       PG_LEVEL_4K, flush_on_yield);
diff --git a/arch/x86/kvm/mmu/shadow_mmu.h b/arch/x86/kvm/mmu/shadow_mmu.h
index 58f48293b4773..36fe8013931d2 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.h
+++ b/arch/x86/kvm/mmu/shadow_mmu.h
@@ -39,11 +39,6 @@ struct pte_list_desc {
 /* Only exported for debugfs.c. */
 unsigned int pte_list_count(struct kvm_rmap_head *rmap_head);
 
-struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
-				  const struct kvm_memory_slot *slot);
-bool rmap_write_protect(struct kvm_rmap_head *rmap_head, bool pt_protect);
-bool __rmap_clear_dirty(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
-			const struct kvm_memory_slot *slot);
 bool kvm_zap_rmap(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
 		  struct kvm_memory_slot *slot, gfn_t gfn, int level,
 		  pte_t unused);
@@ -91,22 +86,9 @@ int kvm_shadow_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
 		       int bytes, struct kvm_page_track_notifier_node *node);
 
-/* The return value indicates if tlb flush on all vcpus is needed. */
-typedef bool (*slot_rmaps_handler) (struct kvm *kvm,
-				    struct kvm_rmap_head *rmap_head,
-				    const struct kvm_memory_slot *slot);
-bool walk_slot_rmaps(struct kvm *kvm, const struct kvm_memory_slot *slot,
-		       slot_rmaps_handler fn, int start_level, int end_level,
-		       bool flush_on_yield);
-bool walk_slot_rmaps_4k(struct kvm *kvm, const struct kvm_memory_slot *slot,
-			slot_rmaps_handler fn, bool flush_on_yield);
-
 void kvm_shadow_mmu_zap_obsolete_pages(struct kvm *kvm);
 bool kvm_shadow_mmu_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end);
 
-bool slot_rmap_write_protect(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
-			     const struct kvm_memory_slot *slot);
-
 void kvm_shadow_mmu_try_split_huge_pages(struct kvm *kvm,
 					 const struct kvm_memory_slot *slot,
 					 gfn_t start, gfn_t end,
-- 
2.39.1.519.gcb327c4b5f-goog