diff mbox series

[15/21] KVM: x86/MMU: Remove unneeded exports from shadow_mmu.c

Message ID 20230202182809.1929122-16-bgardon@google.com
State New
Headers
Series KVM: x86/MMU: Formalize the Shadow MMU |

Commit Message

Ben Gardon Feb. 2, 2023, 6:28 p.m. UTC 
  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(-)

Comments

kernel test robot Feb. 4, 2023, 2:44 p.m. UTC | #1 
Hi Ben,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on 7cb79f433e75b05d1635aefaa851cfcd1cb7dc4f]

url:    https://github.com/intel-lab-lkp/linux/commits/Ben-Gardon/KVM-x86-mmu-Rename-slot-rmap-walkers-to-add-clarity-and-clean-up-code/20230203-023259
base:   7cb79f433e75b05d1635aefaa851cfcd1cb7dc4f
patch link:    https://lore.kernel.org/r/20230202182809.1929122-16-bgardon%40google.com
patch subject: [PATCH 15/21] KVM: x86/MMU: Remove unneeded exports from shadow_mmu.c
config: x86_64-randconfig-a002 (https://download.01.org/0day-ci/archive/20230204/202302042238.bWSFU5Qg-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/133035de32b4ef8bb8e3868c78dbdb3b807f04f4
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Ben-Gardon/KVM-x86-mmu-Rename-slot-rmap-walkers-to-add-clarity-and-clean-up-code/20230203-023259
        git checkout 133035de32b4ef8bb8e3868c78dbdb3b807f04f4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kvm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kvm/mmu/shadow_mmu.c:3208:6: warning: no previous prototype for 'slot_rmap_write_protect' [-Wmissing-prototypes]
    3208 | bool slot_rmap_write_protect(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
         |      ^~~~~~~~~~~~~~~~~~~~~~~


vim +/slot_rmap_write_protect +3208 arch/x86/kvm/mmu/shadow_mmu.c

306e405e1b7fe70 Ben Gardon 2023-02-02  3207  
306e405e1b7fe70 Ben Gardon 2023-02-02 @3208  bool slot_rmap_write_protect(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
306e405e1b7fe70 Ben Gardon 2023-02-02  3209  			     const struct kvm_memory_slot *slot)
306e405e1b7fe70 Ben Gardon 2023-02-02  3210  {
306e405e1b7fe70 Ben Gardon 2023-02-02  3211  	return rmap_write_protect(rmap_head, false);
306e405e1b7fe70 Ben Gardon 2023-02-02  3212  }
306e405e1b7fe70 Ben Gardon 2023-02-02  3213
diff mbox series

Patch

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,