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Date: Tue, 6 Dec 2022 17:35:59 +0000
From: Ben Gardon <bgardon@...gle.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>,
Sean Christopherson <seanjc@...gle.com>,
David Matlack <dmatlack@...gle.com>,
Vipin Sharma <vipinsh@...gle.com>,
Ben Gardon <bgardon@...gle.com>
Subject: [PATCH 5/7] KVM: x86/MMU: Move the rmap walk iterator out of mmu.c
Move slot_rmap_walk_iterator and its associated functions out of mmu.c
to rmap.(c|h).
No functional change intended.
Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
arch/x86/kvm/mmu/mmu.c | 73 -----------------------------------------
arch/x86/kvm/mmu/rmap.c | 43 ++++++++++++++++++++++++
arch/x86/kvm/mmu/rmap.h | 36 ++++++++++++++++++++
3 files changed, 79 insertions(+), 73 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 52e487d89d54..88da2abc2375 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1198,79 +1198,6 @@ static bool kvm_set_pte_rmap(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
return need_flush;
}
-struct slot_rmap_walk_iterator {
- /* input fields. */
- const struct kvm_memory_slot *slot;
- gfn_t start_gfn;
- gfn_t end_gfn;
- int start_level;
- int end_level;
-
- /* output fields. */
- gfn_t gfn;
- struct kvm_rmap_head *rmap;
- int level;
-
- /* private field. */
- struct kvm_rmap_head *end_rmap;
-};
-
-static void
-rmap_walk_init_level(struct slot_rmap_walk_iterator *iterator, int level)
-{
- iterator->level = level;
- iterator->gfn = iterator->start_gfn;
- iterator->rmap = gfn_to_rmap(iterator->gfn, level, iterator->slot);
- iterator->end_rmap = gfn_to_rmap(iterator->end_gfn, level, iterator->slot);
-}
-
-static void
-slot_rmap_walk_init(struct slot_rmap_walk_iterator *iterator,
- const struct kvm_memory_slot *slot, int start_level,
- int end_level, gfn_t start_gfn, gfn_t end_gfn)
-{
- iterator->slot = slot;
- iterator->start_level = start_level;
- iterator->end_level = end_level;
- iterator->start_gfn = start_gfn;
- iterator->end_gfn = end_gfn;
-
- rmap_walk_init_level(iterator, iterator->start_level);
-}
-
-static bool slot_rmap_walk_okay(struct slot_rmap_walk_iterator *iterator)
-{
- return !!iterator->rmap;
-}
-
-static void slot_rmap_walk_next(struct slot_rmap_walk_iterator *iterator)
-{
- while (++iterator->rmap <= iterator->end_rmap) {
- iterator->gfn += (1UL << KVM_HPAGE_GFN_SHIFT(iterator->level));
-
- if (iterator->rmap->val)
- return;
- }
-
- if (++iterator->level > iterator->end_level) {
- iterator->rmap = NULL;
- return;
- }
-
- rmap_walk_init_level(iterator, iterator->level);
-}
-
-#define for_each_slot_rmap_range(_slot_, _start_level_, _end_level_, \
- _start_gfn, _end_gfn, _iter_) \
- for (slot_rmap_walk_init(_iter_, _slot_, _start_level_, \
- _end_level_, _start_gfn, _end_gfn); \
- slot_rmap_walk_okay(_iter_); \
- slot_rmap_walk_next(_iter_))
-
-typedef bool (*rmap_handler_t)(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
- struct kvm_memory_slot *slot, gfn_t gfn,
- int level, pte_t pte);
-
static __always_inline bool kvm_handle_gfn_range(struct kvm *kvm,
struct kvm_gfn_range *range,
rmap_handler_t handler)
diff --git a/arch/x86/kvm/mmu/rmap.c b/arch/x86/kvm/mmu/rmap.c
index 6833676aa9ea..91af5b32cffb 100644
--- a/arch/x86/kvm/mmu/rmap.c
+++ b/arch/x86/kvm/mmu/rmap.c
@@ -240,3 +240,46 @@ void rmap_remove(struct kvm *kvm, u64 *spte)
pte_list_remove(spte, rmap_head);
}
+
+void rmap_walk_init_level(struct slot_rmap_walk_iterator *iterator, int level)
+{
+ iterator->level = level;
+ iterator->gfn = iterator->start_gfn;
+ iterator->rmap = gfn_to_rmap(iterator->gfn, level, iterator->slot);
+ iterator->end_rmap = gfn_to_rmap(iterator->end_gfn, level, iterator->slot);
+}
+
+void slot_rmap_walk_init(struct slot_rmap_walk_iterator *iterator,
+ const struct kvm_memory_slot *slot, int start_level,
+ int end_level, gfn_t start_gfn, gfn_t end_gfn)
+{
+ iterator->slot = slot;
+ iterator->start_level = start_level;
+ iterator->end_level = end_level;
+ iterator->start_gfn = start_gfn;
+ iterator->end_gfn = end_gfn;
+
+ rmap_walk_init_level(iterator, iterator->start_level);
+}
+
+bool slot_rmap_walk_okay(struct slot_rmap_walk_iterator *iterator)
+{
+ return !!iterator->rmap;
+}
+
+void slot_rmap_walk_next(struct slot_rmap_walk_iterator *iterator)
+{
+ while (++iterator->rmap <= iterator->end_rmap) {
+ iterator->gfn += (1UL << KVM_HPAGE_GFN_SHIFT(iterator->level));
+
+ if (iterator->rmap->val)
+ return;
+ }
+
+ if (++iterator->level > iterator->end_level) {
+ iterator->rmap = NULL;
+ return;
+ }
+
+ rmap_walk_init_level(iterator, iterator->level);
+}
diff --git a/arch/x86/kvm/mmu/rmap.h b/arch/x86/kvm/mmu/rmap.h
index 81df186ba3c3..dc4bf7e609ec 100644
--- a/arch/x86/kvm/mmu/rmap.h
+++ b/arch/x86/kvm/mmu/rmap.h
@@ -54,4 +54,40 @@ struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
bool rmap_can_add(struct kvm_vcpu *vcpu);
void rmap_remove(struct kvm *kvm, u64 *spte);
+
+struct slot_rmap_walk_iterator {
+ /* input fields. */
+ const struct kvm_memory_slot *slot;
+ gfn_t start_gfn;
+ gfn_t end_gfn;
+ int start_level;
+ int end_level;
+
+ /* output fields. */
+ gfn_t gfn;
+ struct kvm_rmap_head *rmap;
+ int level;
+
+ /* private field. */
+ struct kvm_rmap_head *end_rmap;
+};
+
+void rmap_walk_init_level(struct slot_rmap_walk_iterator *iterator, int level);
+void slot_rmap_walk_init(struct slot_rmap_walk_iterator *iterator,
+ const struct kvm_memory_slot *slot, int start_level,
+ int end_level, gfn_t start_gfn, gfn_t end_gfn);
+bool slot_rmap_walk_okay(struct slot_rmap_walk_iterator *iterator);
+void slot_rmap_walk_next(struct slot_rmap_walk_iterator *iterator);
+
+#define for_each_slot_rmap_range(_slot_, _start_level_, _end_level_, \
+ _start_gfn, _end_gfn, _iter_) \
+ for (slot_rmap_walk_init(_iter_, _slot_, _start_level_, \
+ _end_level_, _start_gfn, _end_gfn); \
+ slot_rmap_walk_okay(_iter_); \
+ slot_rmap_walk_next(_iter_))
+
+typedef bool (*rmap_handler_t)(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
+ struct kvm_memory_slot *slot, gfn_t gfn,
+ int level, pte_t pte);
+
#endif /* __KVM_X86_MMU_RMAP_H */
--
2.39.0.rc0.267.gcb52ba06e7-goog
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