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Date: Thu, 2 Feb 2023 18:28:08 +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>,
Ricardo Koller <ricarkol@...gle.com>,
Ben Gardon <bgardon@...gle.com>
Subject: [PATCH 20/21] KVM: x86/mmu: Move Shadow MMU init/teardown to shadow_mmu.c
Move the meat of kvm_mmu_init_vm() and kvm_mmu_uninit_vm() pertaining to
the Shadow MMU to shadow_mmu.c.
Suggested-by: David Matlack <dmatlack@...gle.com>
Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
arch/x86/kvm/mmu/mmu.c | 41 +++---------------------------
arch/x86/kvm/mmu/mmu_internal.h | 2 ++
arch/x86/kvm/mmu/shadow_mmu.c | 44 +++++++++++++++++++++++++++++++--
arch/x86/kvm/mmu/shadow_mmu.h | 6 ++---
4 files changed, 51 insertions(+), 42 deletions(-)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 63b928bded9d1..10aff23dea75d 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2743,7 +2743,7 @@ int kvm_mmu_create(struct kvm_vcpu *vcpu)
* not use any resource of the being-deleted slot or all slots
* after calling the function.
*/
-static void kvm_mmu_zap_all_fast(struct kvm *kvm)
+void kvm_mmu_zap_all_fast(struct kvm *kvm)
{
lockdep_assert_held(&kvm->slots_lock);
@@ -2795,22 +2795,13 @@ static void kvm_mmu_zap_all_fast(struct kvm *kvm)
kvm_tdp_mmu_zap_invalidated_roots(kvm);
}
-static void kvm_mmu_invalidate_zap_pages_in_memslot(struct kvm *kvm,
- struct kvm_memory_slot *slot,
- struct kvm_page_track_notifier_node *node)
-{
- kvm_mmu_zap_all_fast(kvm);
-}
-
int kvm_mmu_init_vm(struct kvm *kvm)
{
- struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker;
int r;
- INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
- INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages);
INIT_LIST_HEAD(&kvm->arch.possible_nx_huge_pages);
- spin_lock_init(&kvm->arch.mmu_unsync_pages_lock);
+
+ kvm_mmu_init_shadow_mmu(kvm);
if (tdp_mmu_enabled) {
r = kvm_mmu_init_tdp_mmu(kvm);
@@ -2818,38 +2809,14 @@ int kvm_mmu_init_vm(struct kvm *kvm)
return r;
}
- node->track_write = kvm_shadow_mmu_pte_write;
- node->track_flush_slot = kvm_mmu_invalidate_zap_pages_in_memslot;
- kvm_page_track_register_notifier(kvm, node);
-
- kvm->arch.split_page_header_cache.kmem_cache = mmu_page_header_cache;
- kvm->arch.split_page_header_cache.gfp_zero = __GFP_ZERO;
-
- kvm->arch.split_shadow_page_cache.gfp_zero = __GFP_ZERO;
-
- kvm->arch.split_desc_cache.kmem_cache = pte_list_desc_cache;
- kvm->arch.split_desc_cache.gfp_zero = __GFP_ZERO;
-
return 0;
}
-static void mmu_free_vm_memory_caches(struct kvm *kvm)
-{
- kvm_mmu_free_memory_cache(&kvm->arch.split_desc_cache);
- kvm_mmu_free_memory_cache(&kvm->arch.split_page_header_cache);
- kvm_mmu_free_memory_cache(&kvm->arch.split_shadow_page_cache);
-}
-
void kvm_mmu_uninit_vm(struct kvm *kvm)
{
- struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker;
-
- kvm_page_track_unregister_notifier(kvm, node);
-
+ kvm_mmu_uninit_shadow_mmu(kvm);
if (tdp_mmu_enabled)
kvm_mmu_uninit_tdp_mmu(kvm);
-
- mmu_free_vm_memory_caches(kvm);
}
/*
diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h
index 2273c6263faf0..c49d302b037ec 100644
--- a/arch/x86/kvm/mmu/mmu_internal.h
+++ b/arch/x86/kvm/mmu/mmu_internal.h
@@ -406,4 +406,6 @@ BUILD_MMU_ROLE_ACCESSOR(ext, cr4, pke);
BUILD_MMU_ROLE_ACCESSOR(ext, cr4, la57);
BUILD_MMU_ROLE_ACCESSOR(base, efer, nx);
BUILD_MMU_ROLE_ACCESSOR(ext, efer, lma);
+
+void kvm_mmu_zap_all_fast(struct kvm *kvm);
#endif /* __KVM_X86_MMU_INTERNAL_H */
diff --git a/arch/x86/kvm/mmu/shadow_mmu.c b/arch/x86/kvm/mmu/shadow_mmu.c
index c6d3da795992e..6449ac4de4883 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.c
+++ b/arch/x86/kvm/mmu/shadow_mmu.c
@@ -3013,8 +3013,9 @@ static u64 *get_written_sptes(struct kvm_mmu_page *sp, gpa_t gpa, int *nspte)
return spte;
}
-void kvm_shadow_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
- int bytes, struct kvm_page_track_notifier_node *node)
+static void kvm_shadow_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
+ const u8 *new, int bytes,
+ struct kvm_page_track_notifier_node *node)
{
gfn_t gfn = gpa >> PAGE_SHIFT;
struct kvm_mmu_page *sp;
@@ -3623,3 +3624,42 @@ void kvm_shadow_mmu_zap_all(struct kvm *kvm)
kvm_shadow_mmu_commit_zap_page(kvm, &invalid_list);
}
+
+static void kvm_shadow_mmu_invalidate_zap_pages_in_memslot(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ struct kvm_page_track_notifier_node *node)
+{
+ kvm_mmu_zap_all_fast(kvm);
+}
+
+void kvm_mmu_init_shadow_mmu(struct kvm *kvm)
+{
+ struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker;
+
+ INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
+ INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages);
+ spin_lock_init(&kvm->arch.mmu_unsync_pages_lock);
+
+ node->track_write = kvm_shadow_mmu_pte_write;
+ node->track_flush_slot = kvm_shadow_mmu_invalidate_zap_pages_in_memslot;
+ kvm_page_track_register_notifier(kvm, node);
+
+ kvm->arch.split_page_header_cache.kmem_cache = mmu_page_header_cache;
+ kvm->arch.split_page_header_cache.gfp_zero = __GFP_ZERO;
+
+ kvm->arch.split_shadow_page_cache.gfp_zero = __GFP_ZERO;
+
+ kvm->arch.split_desc_cache.kmem_cache = pte_list_desc_cache;
+ kvm->arch.split_desc_cache.gfp_zero = __GFP_ZERO;
+}
+
+void kvm_mmu_uninit_shadow_mmu(struct kvm *kvm)
+{
+ struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker;
+
+ kvm_page_track_unregister_notifier(kvm, node);
+
+ kvm_mmu_free_memory_cache(&kvm->arch.split_desc_cache);
+ kvm_mmu_free_memory_cache(&kvm->arch.split_page_header_cache);
+ kvm_mmu_free_memory_cache(&kvm->arch.split_shadow_page_cache);
+}
diff --git a/arch/x86/kvm/mmu/shadow_mmu.h b/arch/x86/kvm/mmu/shadow_mmu.h
index ab01636373bda..f2e54355ebb19 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.h
+++ b/arch/x86/kvm/mmu/shadow_mmu.h
@@ -65,9 +65,6 @@ int kvm_shadow_mmu_alloc_special_roots(struct kvm_vcpu *vcpu);
int kvm_shadow_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
int *root_level);
-void kvm_shadow_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
- int bytes, struct kvm_page_track_notifier_node *node);
-
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);
@@ -103,6 +100,9 @@ bool kvm_shadow_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
void kvm_shadow_mmu_zap_all(struct kvm *kvm);
+void kvm_mmu_init_shadow_mmu(struct kvm *kvm);
+void kvm_mmu_uninit_shadow_mmu(struct kvm *kvm);
+
/* Exports from paging_tmpl.h */
gpa_t paging32_gva_to_gpa(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
gpa_t vaddr, u64 access,
--
2.39.1.519.gcb327c4b5f-goog
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