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Message-ID: <20221221222418.3307832-7-bgardon@google.com>
Date: Wed, 21 Dec 2022 22:24:10 +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>,
Nagareddy Reddy <nspreddy@...gle.com>,
Ben Gardon <bgardon@...gle.com>
Subject: [RFC 06/14] KVM: x86/MMU: Clean up Shadow MMU exports
Now that paging_tmpl.h is included from shadow_mmu.c, there's no need to
export many of the functions currrently in shadow_mmu.h, so remove those
exports and mark the functions static. This cleans up the interface
of the Shadow MMU, and will allow the implementation to keep the details
of rmap_heads internal.
No functional change intended.
Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
arch/x86/kvm/mmu/shadow_mmu.c | 78 +++++++++++++++++++++--------------
arch/x86/kvm/mmu/shadow_mmu.h | 51 +----------------------
2 files changed, 48 insertions(+), 81 deletions(-)
diff --git a/arch/x86/kvm/mmu/shadow_mmu.c b/arch/x86/kvm/mmu/shadow_mmu.c
index 86b5fb75d50a..090b4788f7de 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.c
+++ b/arch/x86/kvm/mmu/shadow_mmu.c
@@ -21,6 +21,20 @@
#include <asm/cmpxchg.h>
#include <trace/events/kvm.h>
+struct kvm_shadow_walk_iterator {
+ u64 addr;
+ hpa_t shadow_addr;
+ u64 *sptep;
+ int level;
+ unsigned index;
+};
+
+#define for_each_shadow_entry_using_root(_vcpu, _root, _addr, _walker) \
+ for (shadow_walk_init_using_root(&(_walker), (_vcpu), \
+ (_root), (_addr)); \
+ shadow_walk_okay(&(_walker)); \
+ shadow_walk_next(&(_walker)))
+
#define for_each_shadow_entry(_vcpu, _addr, _walker) \
for (shadow_walk_init(&(_walker), _vcpu, _addr); \
shadow_walk_okay(&(_walker)); \
@@ -227,7 +241,7 @@ static u64 mmu_spte_update_no_track(u64 *sptep, u64 new_spte)
*
* Returns true if the TLB needs to be flushed
*/
-bool mmu_spte_update(u64 *sptep, u64 new_spte)
+static bool mmu_spte_update(u64 *sptep, u64 new_spte)
{
bool flush = false;
u64 old_spte = mmu_spte_update_no_track(sptep, new_spte);
@@ -311,7 +325,7 @@ static u64 mmu_spte_clear_track_bits(struct kvm *kvm, u64 *sptep)
* Directly clear spte without caring the state bits of sptep,
* it is used to set the upper level spte.
*/
-void mmu_spte_clear_no_track(u64 *sptep)
+static void mmu_spte_clear_no_track(u64 *sptep)
{
__update_clear_spte_fast(sptep, 0ull);
}
@@ -354,7 +368,7 @@ static void mmu_free_pte_list_desc(struct pte_list_desc *pte_list_desc)
static bool sp_has_gptes(struct kvm_mmu_page *sp);
-gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index)
+static gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index)
{
if (sp->role.passthrough)
return sp->gfn;
@@ -410,8 +424,8 @@ static void kvm_mmu_page_set_translation(struct kvm_mmu_page *sp, int index,
sp->gfn, kvm_mmu_page_get_gfn(sp, index), gfn);
}
-void kvm_mmu_page_set_access(struct kvm_mmu_page *sp, int index,
- unsigned int access)
+static void kvm_mmu_page_set_access(struct kvm_mmu_page *sp, int index,
+ unsigned int access)
{
gfn_t gfn = kvm_mmu_page_get_gfn(sp, index);
@@ -627,7 +641,7 @@ struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
return &slot->arch.rmap[level - PG_LEVEL_4K][idx];
}
-bool rmap_can_add(struct kvm_vcpu *vcpu)
+static bool rmap_can_add(struct kvm_vcpu *vcpu)
{
struct kvm_mmu_memory_cache *mc;
@@ -735,7 +749,7 @@ static u64 *rmap_get_next(struct rmap_iterator *iter)
for (_spte_ = rmap_get_first(_rmap_head_, _iter_); \
_spte_; _spte_ = rmap_get_next(_iter_))
-void drop_spte(struct kvm *kvm, u64 *sptep)
+static void drop_spte(struct kvm *kvm, u64 *sptep)
{
u64 old_spte = mmu_spte_clear_track_bits(kvm, sptep);
@@ -1112,7 +1126,7 @@ static void mmu_page_remove_parent_pte(struct kvm_mmu_page *sp,
pte_list_remove(parent_pte, &sp->parent_ptes);
}
-void drop_parent_pte(struct kvm_mmu_page *sp, u64 *parent_pte)
+static void drop_parent_pte(struct kvm_mmu_page *sp, u64 *parent_pte)
{
mmu_page_remove_parent_pte(sp, parent_pte);
mmu_spte_clear_no_track(parent_pte);
@@ -1342,8 +1356,8 @@ static void mmu_pages_clear_parents(struct mmu_page_path *parents)
} while (!sp->unsync_children);
}
-int mmu_sync_children(struct kvm_vcpu *vcpu, struct kvm_mmu_page *parent,
- bool can_yield)
+static int mmu_sync_children(struct kvm_vcpu *vcpu, struct kvm_mmu_page *parent,
+ bool can_yield)
{
int i;
struct kvm_mmu_page *sp;
@@ -1389,7 +1403,7 @@ void __clear_sp_write_flooding_count(struct kvm_mmu_page *sp)
atomic_set(&sp->write_flooding_count, 0);
}
-void clear_sp_write_flooding_count(u64 *spte)
+static void clear_sp_write_flooding_count(u64 *spte)
{
__clear_sp_write_flooding_count(sptep_to_sp(spte));
}
@@ -1602,9 +1616,9 @@ static union kvm_mmu_page_role kvm_mmu_child_role(u64 *sptep, bool direct,
return role;
}
-struct kvm_mmu_page *kvm_mmu_get_child_sp(struct kvm_vcpu *vcpu, u64 *sptep,
- gfn_t gfn, bool direct,
- unsigned int access)
+static struct kvm_mmu_page *kvm_mmu_get_child_sp(struct kvm_vcpu *vcpu,
+ u64 *sptep, gfn_t gfn,
+ bool direct, unsigned int access)
{
union kvm_mmu_page_role role;
@@ -1615,8 +1629,9 @@ struct kvm_mmu_page *kvm_mmu_get_child_sp(struct kvm_vcpu *vcpu, u64 *sptep,
return kvm_mmu_get_shadow_page(vcpu, gfn, role);
}
-void shadow_walk_init_using_root(struct kvm_shadow_walk_iterator *iterator,
- struct kvm_vcpu *vcpu, hpa_t root, u64 addr)
+static void shadow_walk_init_using_root(struct kvm_shadow_walk_iterator *iterator,
+ struct kvm_vcpu *vcpu, hpa_t root,
+ u64 addr)
{
iterator->addr = addr;
iterator->shadow_addr = root;
@@ -1643,14 +1658,14 @@ void shadow_walk_init_using_root(struct kvm_shadow_walk_iterator *iterator,
}
}
-void shadow_walk_init(struct kvm_shadow_walk_iterator *iterator,
- struct kvm_vcpu *vcpu, u64 addr)
+static void shadow_walk_init(struct kvm_shadow_walk_iterator *iterator,
+ struct kvm_vcpu *vcpu, u64 addr)
{
shadow_walk_init_using_root(iterator, vcpu, vcpu->arch.mmu->root.hpa,
addr);
}
-bool shadow_walk_okay(struct kvm_shadow_walk_iterator *iterator)
+static bool shadow_walk_okay(struct kvm_shadow_walk_iterator *iterator)
{
if (iterator->level < PG_LEVEL_4K)
return false;
@@ -1672,7 +1687,7 @@ static void __shadow_walk_next(struct kvm_shadow_walk_iterator *iterator,
--iterator->level;
}
-void shadow_walk_next(struct kvm_shadow_walk_iterator *iterator)
+static void shadow_walk_next(struct kvm_shadow_walk_iterator *iterator)
{
__shadow_walk_next(iterator, *iterator->sptep);
}
@@ -1703,13 +1718,14 @@ static void __link_shadow_page(struct kvm *kvm,
mark_unsync(sptep);
}
-void link_shadow_page(struct kvm_vcpu *vcpu, u64 *sptep, struct kvm_mmu_page *sp)
+static void link_shadow_page(struct kvm_vcpu *vcpu, u64 *sptep,
+ struct kvm_mmu_page *sp)
{
__link_shadow_page(vcpu->kvm, &vcpu->arch.mmu_pte_list_desc_cache, sptep, sp, true);
}
-void validate_direct_spte(struct kvm_vcpu *vcpu, u64 *sptep,
- unsigned direct_access)
+static void validate_direct_spte(struct kvm_vcpu *vcpu, u64 *sptep,
+ unsigned direct_access)
{
if (is_shadow_present_pte(*sptep) && !is_large_pte(*sptep)) {
struct kvm_mmu_page *child;
@@ -1731,8 +1747,8 @@ void validate_direct_spte(struct kvm_vcpu *vcpu, u64 *sptep,
}
/* Returns the number of zapped non-leaf child shadow pages. */
-int mmu_page_zap_pte(struct kvm *kvm, struct kvm_mmu_page *sp, u64 *spte,
- struct list_head *invalid_list)
+static int mmu_page_zap_pte(struct kvm *kvm, struct kvm_mmu_page *sp, u64 *spte,
+ struct list_head *invalid_list)
{
u64 pte;
struct kvm_mmu_page *child;
@@ -2144,9 +2160,9 @@ int mmu_try_to_unsync_pages(struct kvm *kvm, const struct kvm_memory_slot *slot,
return 0;
}
-int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
- u64 *sptep, unsigned int pte_access, gfn_t gfn,
- kvm_pfn_t pfn, struct kvm_page_fault *fault)
+static int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
+ u64 *sptep, unsigned int pte_access, gfn_t gfn,
+ kvm_pfn_t pfn, struct kvm_page_fault *fault)
{
struct kvm_mmu_page *sp = sptep_to_sp(sptep);
int level = sp->role.level;
@@ -2251,8 +2267,8 @@ static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu,
return 0;
}
-void __direct_pte_prefetch(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
- u64 *sptep)
+static void __direct_pte_prefetch(struct kvm_vcpu *vcpu,
+ struct kvm_mmu_page *sp, u64 *sptep)
{
u64 *spte, *start = NULL;
int i;
@@ -2788,7 +2804,7 @@ int get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, int *root_level)
return leaf;
}
-void shadow_page_table_clear_flood(struct kvm_vcpu *vcpu, gva_t addr)
+static void shadow_page_table_clear_flood(struct kvm_vcpu *vcpu, gva_t addr)
{
struct kvm_shadow_walk_iterator iterator;
u64 spte;
diff --git a/arch/x86/kvm/mmu/shadow_mmu.h b/arch/x86/kvm/mmu/shadow_mmu.h
index 00d2f9abecf0..20c65a0ea52c 100644
--- a/arch/x86/kvm/mmu/shadow_mmu.h
+++ b/arch/x86/kvm/mmu/shadow_mmu.h
@@ -23,32 +23,11 @@ struct pte_list_desc {
u64 *sptes[PTE_LIST_EXT];
};
+/* Only exported for debugfs.c. */
unsigned int pte_list_count(struct kvm_rmap_head *rmap_head);
-struct kvm_shadow_walk_iterator {
- u64 addr;
- hpa_t shadow_addr;
- u64 *sptep;
- int level;
- unsigned index;
-};
-
-#define for_each_shadow_entry_using_root(_vcpu, _root, _addr, _walker) \
- for (shadow_walk_init_using_root(&(_walker), (_vcpu), \
- (_root), (_addr)); \
- shadow_walk_okay(&(_walker)); \
- shadow_walk_next(&(_walker)))
-
-bool mmu_spte_update(u64 *sptep, u64 new_spte);
-void mmu_spte_clear_no_track(u64 *sptep);
-gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index);
-void kvm_mmu_page_set_access(struct kvm_mmu_page *sp, int index,
- unsigned int access);
-
struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
const struct kvm_memory_slot *slot);
-bool rmap_can_add(struct kvm_vcpu *vcpu);
-void drop_spte(struct kvm *kvm, u64 *sptep);
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);
@@ -72,30 +51,8 @@ bool kvm_test_age_rmap(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
struct kvm_memory_slot *slot, gfn_t gfn,
int level, pte_t unused);
-void drop_parent_pte(struct kvm_mmu_page *sp, u64 *parent_pte);
-int mmu_sync_children(struct kvm_vcpu *vcpu, struct kvm_mmu_page *parent,
- bool can_yield);
void __clear_sp_write_flooding_count(struct kvm_mmu_page *sp);
-void clear_sp_write_flooding_count(u64 *spte);
-
-struct kvm_mmu_page *kvm_mmu_get_child_sp(struct kvm_vcpu *vcpu, u64 *sptep,
- gfn_t gfn, bool direct,
- unsigned int access);
-
-void shadow_walk_init_using_root(struct kvm_shadow_walk_iterator *iterator,
- struct kvm_vcpu *vcpu, hpa_t root, u64 addr);
-void shadow_walk_init(struct kvm_shadow_walk_iterator *iterator,
- struct kvm_vcpu *vcpu, u64 addr);
-bool shadow_walk_okay(struct kvm_shadow_walk_iterator *iterator);
-void shadow_walk_next(struct kvm_shadow_walk_iterator *iterator);
-
-void link_shadow_page(struct kvm_vcpu *vcpu, u64 *sptep, struct kvm_mmu_page *sp);
-
-void validate_direct_spte(struct kvm_vcpu *vcpu, u64 *sptep,
- unsigned direct_access);
-int mmu_page_zap_pte(struct kvm *kvm, struct kvm_mmu_page *sp, u64 *spte,
- struct list_head *invalid_list);
bool __kvm_mmu_prepare_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp,
struct list_head *invalid_list,
int *nr_zapped);
@@ -107,11 +64,6 @@ int make_mmu_pages_available(struct kvm_vcpu *vcpu);
int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
-int mmu_set_spte(struct kvm_vcpu *vcpu, struct kvm_memory_slot *slot,
- u64 *sptep, unsigned int pte_access, gfn_t gfn,
- kvm_pfn_t pfn, struct kvm_page_fault *fault);
-void __direct_pte_prefetch(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
- u64 *sptep);
int __direct_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
u64 *fast_pf_get_last_sptep(struct kvm_vcpu *vcpu, gpa_t gpa, u64 *spte);
@@ -121,7 +73,6 @@ int mmu_alloc_special_roots(struct kvm_vcpu *vcpu);
int get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, int *root_level);
-void shadow_page_table_clear_flood(struct kvm_vcpu *vcpu, gva_t addr);
void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
int bytes, struct kvm_page_track_notifier_node *node);
--
2.39.0.314.g84b9a713c41-goog
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