_ASM_EXTABLE(666b, 667b)
#define KVM_ARCH_WANT_MMU_NOTIFIER
+#define KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v);
int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
return flush;
}
-static int kvm_unmap_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
- struct kvm_memory_slot *slot, gfn_t gfn, int level,
- unsigned long data)
+static bool kvm_unmap_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
+ struct kvm_memory_slot *slot, gfn_t gfn, int level,
+ pte_t unused)
{
return kvm_zap_rmapp(kvm, rmap_head, slot);
}
-static int kvm_set_pte_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
- struct kvm_memory_slot *slot, gfn_t gfn, int level,
- unsigned long data)
+static bool kvm_set_pte_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
+ struct kvm_memory_slot *slot, gfn_t gfn, int level,
+ pte_t pte)
{
u64 *sptep;
struct rmap_iterator iter;
int need_flush = 0;
u64 new_spte;
- pte_t *ptep = (pte_t *)data;
kvm_pfn_t new_pfn;
- WARN_ON(pte_huge(*ptep));
- new_pfn = pte_pfn(*ptep);
+ WARN_ON(pte_huge(pte));
+ new_pfn = pte_pfn(pte);
restart:
for_each_rmap_spte(rmap_head, &iter, sptep) {
need_flush = 1;
- if (pte_write(*ptep)) {
+ if (pte_write(pte)) {
pte_list_remove(rmap_head, sptep);
goto restart;
} else {
slot_rmap_walk_okay(_iter_); \
slot_rmap_walk_next(_iter_))
-typedef int (*rmap_handler_t)(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
- struct kvm_memory_slot *slot, gfn_t gfn,
- int level, unsigned long data);
+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 int kvm_handle_hva_range(struct kvm *kvm,
- unsigned long start,
- unsigned long end,
- unsigned long data,
- rmap_handler_t handler)
+static __always_inline bool kvm_handle_gfn_range(struct kvm *kvm,
+ struct kvm_gfn_range *range,
+ rmap_handler_t handler)
{
- struct kvm_memslots *slots;
- struct kvm_memory_slot *memslot;
struct slot_rmap_walk_iterator iterator;
- int ret = 0;
- int i;
-
- for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
- slots = __kvm_memslots(kvm, i);
- kvm_for_each_memslot(memslot, slots) {
- unsigned long hva_start, hva_end;
- gfn_t gfn_start, gfn_end;
+ bool ret = false;
- hva_start = max(start, memslot->userspace_addr);
- hva_end = min(end, memslot->userspace_addr +
- (memslot->npages << PAGE_SHIFT));
- if (hva_start >= hva_end)
- continue;
- /*
- * {gfn(page) | page intersects with [hva_start, hva_end)} =
- * {gfn_start, gfn_start+1, ..., gfn_end-1}.
- */
- gfn_start = hva_to_gfn_memslot(hva_start, memslot);
- gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
-
- for_each_slot_rmap_range(memslot, PG_LEVEL_4K,
- KVM_MAX_HUGEPAGE_LEVEL,
- gfn_start, gfn_end - 1,
- &iterator)
- ret |= handler(kvm, iterator.rmap, memslot,
- iterator.gfn, iterator.level, data);
- }
- }
+ for_each_slot_rmap_range(range->slot, PG_LEVEL_4K, KVM_MAX_HUGEPAGE_LEVEL,
+ range->start, range->end - 1, &iterator)
+ ret |= handler(kvm, iterator.rmap, range->slot, iterator.gfn,
+ iterator.level, range->pte);
return ret;
}
-static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
- unsigned long data, rmap_handler_t handler)
+bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
{
- return kvm_handle_hva_range(kvm, hva, hva + 1, data, handler);
-}
-
-int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
- unsigned flags)
-{
- int r;
+ bool flush;
- r = kvm_handle_hva_range(kvm, start, end, 0, kvm_unmap_rmapp);
+ flush = kvm_handle_gfn_range(kvm, range, kvm_unmap_rmapp);
if (is_tdp_mmu_enabled(kvm))
- r |= kvm_tdp_mmu_zap_hva_range(kvm, start, end);
+ flush |= kvm_tdp_mmu_unmap_gfn_range(kvm, range, flush);
- return r;
+ return flush;
}
-int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
+bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
- int r;
+ bool flush;
- r = kvm_handle_hva(kvm, hva, (unsigned long)&pte, kvm_set_pte_rmapp);
+ flush = kvm_handle_gfn_range(kvm, range, kvm_set_pte_rmapp);
if (is_tdp_mmu_enabled(kvm))
- r |= kvm_tdp_mmu_set_spte_hva(kvm, hva, &pte);
+ flush |= kvm_tdp_mmu_set_spte_gfn(kvm, range);
- return r;
+ return flush;
}
-static int kvm_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
- struct kvm_memory_slot *slot, gfn_t gfn, int level,
- unsigned long data)
+static bool kvm_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
+ struct kvm_memory_slot *slot, gfn_t gfn, int level,
+ pte_t unused)
{
u64 *sptep;
struct rmap_iterator iter;
return young;
}
-static int kvm_test_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
- struct kvm_memory_slot *slot, gfn_t gfn,
- int level, unsigned long data)
+static bool kvm_test_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
+ struct kvm_memory_slot *slot, gfn_t gfn,
+ int level, pte_t unused)
{
u64 *sptep;
struct rmap_iterator iter;
rmap_head = gfn_to_rmap(vcpu->kvm, gfn, sp);
- kvm_unmap_rmapp(vcpu->kvm, rmap_head, NULL, gfn, sp->role.level, 0);
+ kvm_unmap_rmapp(vcpu->kvm, rmap_head, NULL, gfn, sp->role.level, __pte(0));
kvm_flush_remote_tlbs_with_address(vcpu->kvm, sp->gfn,
KVM_PAGES_PER_HPAGE(sp->role.level));
}
-int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
+bool kvm_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
- int young = false;
+ bool young;
+
+ young = kvm_handle_gfn_range(kvm, range, kvm_age_rmapp);
- young = kvm_handle_hva_range(kvm, start, end, 0, kvm_age_rmapp);
if (is_tdp_mmu_enabled(kvm))
- young |= kvm_tdp_mmu_age_hva_range(kvm, start, end);
+ young |= kvm_tdp_mmu_age_gfn_range(kvm, range);
return young;
}
-int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
+bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
- int young = false;
+ bool young;
+
+ young = kvm_handle_gfn_range(kvm, range, kvm_test_age_rmapp);
- young = kvm_handle_hva(kvm, hva, 0, kvm_test_age_rmapp);
if (is_tdp_mmu_enabled(kvm))
- young |= kvm_tdp_mmu_test_age_hva(kvm, hva);
+ young |= kvm_tdp_mmu_test_age_gfn(kvm, range);
return young;
}
return ret;
}
-typedef int (*tdp_handler_t)(struct kvm *kvm, struct kvm_memory_slot *slot,
- struct kvm_mmu_page *root, gfn_t start, gfn_t end,
- unsigned long data);
-
-static __always_inline int kvm_tdp_mmu_handle_hva_range(struct kvm *kvm,
- unsigned long start,
- unsigned long end,
- unsigned long data,
- tdp_handler_t handler)
+bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,
+ bool flush)
{
- struct kvm_memslots *slots;
- struct kvm_memory_slot *memslot;
struct kvm_mmu_page *root;
- int ret = 0;
- int as_id;
-
- for (as_id = 0; as_id < KVM_ADDRESS_SPACE_NUM; as_id++) {
- for_each_tdp_mmu_root_yield_safe(kvm, root, as_id) {
- slots = __kvm_memslots(kvm, as_id);
- kvm_for_each_memslot(memslot, slots) {
- unsigned long hva_start, hva_end;
- gfn_t gfn_start, gfn_end;
-
- hva_start = max(start, memslot->userspace_addr);
- hva_end = min(end, memslot->userspace_addr +
- (memslot->npages << PAGE_SHIFT));
- if (hva_start >= hva_end)
- continue;
- /*
- * {gfn(page) | page intersects with [hva_start, hva_end)} =
- * {gfn_start, gfn_start+1, ..., gfn_end-1}.
- */
- gfn_start = hva_to_gfn_memslot(hva_start, memslot);
- gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
-
- ret |= handler(kvm, memslot, root, gfn_start,
- gfn_end, data);
- }
- }
- }
- return ret;
-}
+ for_each_tdp_mmu_root(kvm, root, range->slot->as_id)
+ flush |= zap_gfn_range(kvm, root, range->start, range->end,
+ false, flush);
-static __always_inline int kvm_tdp_mmu_handle_hva(struct kvm *kvm,
- unsigned long addr,
- unsigned long data,
- tdp_handler_t handler)
-{
- return kvm_tdp_mmu_handle_hva_range(kvm, addr, addr + 1, data, handler);
+ return flush;
}
-static int zap_gfn_range_hva_wrapper(struct kvm *kvm,
- struct kvm_memory_slot *slot,
- struct kvm_mmu_page *root, gfn_t start,
- gfn_t end, unsigned long unused)
-{
- return zap_gfn_range(kvm, root, start, end, false, false);
-}
+typedef bool (*tdp_handler_t)(struct kvm *kvm, struct tdp_iter *iter,
+ struct kvm_gfn_range *range);
-int kvm_tdp_mmu_zap_hva_range(struct kvm *kvm, unsigned long start,
- unsigned long end)
+static __always_inline bool kvm_tdp_mmu_handle_gfn(struct kvm *kvm,
+ struct kvm_gfn_range *range,
+ tdp_handler_t handler)
{
- return kvm_tdp_mmu_handle_hva_range(kvm, start, end, 0,
- zap_gfn_range_hva_wrapper);
+ struct kvm_mmu_page *root;
+ struct tdp_iter iter;
+ bool ret = false;
+
+ rcu_read_lock();
+
+ for_each_tdp_mmu_root(kvm, root, range->slot->as_id) {
+ tdp_root_for_each_leaf_pte(iter, root, range->start, range->end)
+ ret |= handler(kvm, &iter, range);
+ }
+
+ rcu_read_unlock();
+
+ return ret;
}
/*
* Mark the SPTEs range of GFNs [start, end) unaccessed and return non-zero
* if any of the GFNs in the range have been accessed.
*/
-static int age_gfn_range(struct kvm *kvm, struct kvm_memory_slot *slot,
- struct kvm_mmu_page *root, gfn_t start, gfn_t end,
- unsigned long unused)
+static bool age_gfn_range(struct kvm *kvm, struct tdp_iter *iter,
+ struct kvm_gfn_range *range)
{
- struct tdp_iter iter;
- int young = 0;
- u64 new_spte;
+ u64 new_spte = 0;
- rcu_read_lock();
+ /* If we have a non-accessed entry we don't need to change the pte. */
+ if (!is_accessed_spte(iter->old_spte))
+ return false;
- tdp_root_for_each_leaf_pte(iter, root, start, end) {
+ new_spte = iter->old_spte;
+
+ if (spte_ad_enabled(new_spte)) {
+ new_spte &= ~shadow_accessed_mask;
+ } else {
/*
- * If we have a non-accessed entry we don't need to change the
- * pte.
+ * Capture the dirty status of the page, so that it doesn't get
+ * lost when the SPTE is marked for access tracking.
*/
- if (!is_accessed_spte(iter.old_spte))
- continue;
+ if (is_writable_pte(new_spte))
+ kvm_set_pfn_dirty(spte_to_pfn(new_spte));
- new_spte = iter.old_spte;
-
- if (spte_ad_enabled(new_spte)) {
- new_spte &= ~shadow_accessed_mask;
- } else {
- /*
- * Capture the dirty status of the page, so that it doesn't get
- * lost when the SPTE is marked for access tracking.
- */
- if (is_writable_pte(new_spte))
- kvm_set_pfn_dirty(spte_to_pfn(new_spte));
-
- new_spte = mark_spte_for_access_track(new_spte);
- }
-
- tdp_mmu_set_spte_no_acc_track(kvm, &iter, new_spte);
- young = 1;
+ new_spte = mark_spte_for_access_track(new_spte);
}
- rcu_read_unlock();
+ tdp_mmu_set_spte_no_acc_track(kvm, iter, new_spte);
- return young;
+ return true;
}
-int kvm_tdp_mmu_age_hva_range(struct kvm *kvm, unsigned long start,
- unsigned long end)
+bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
{
- return kvm_tdp_mmu_handle_hva_range(kvm, start, end, 0,
- age_gfn_range);
+ return kvm_tdp_mmu_handle_gfn(kvm, range, age_gfn_range);
}
-static int test_age_gfn(struct kvm *kvm, struct kvm_memory_slot *slot,
- struct kvm_mmu_page *root, gfn_t gfn, gfn_t end,
- unsigned long unused)
+static bool test_age_gfn(struct kvm *kvm, struct tdp_iter *iter,
+ struct kvm_gfn_range *range)
{
- struct tdp_iter iter;
-
- tdp_root_for_each_leaf_pte(iter, root, gfn, end)
- if (is_accessed_spte(iter.old_spte))
- return 1;
-
- return 0;
+ return is_accessed_spte(iter->old_spte);
}
-int kvm_tdp_mmu_test_age_hva(struct kvm *kvm, unsigned long hva)
+bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
- return kvm_tdp_mmu_handle_hva(kvm, hva, 0, test_age_gfn);
+ return kvm_tdp_mmu_handle_gfn(kvm, range, test_age_gfn);
}
-/*
- * Handle the changed_pte MMU notifier for the TDP MMU.
- * data is a pointer to the new pte_t mapping the HVA specified by the MMU
- * notifier.
- * Returns non-zero if a flush is needed before releasing the MMU lock.
- */
-static int set_tdp_spte(struct kvm *kvm, struct kvm_memory_slot *slot,
- struct kvm_mmu_page *root, gfn_t gfn, gfn_t end,
- unsigned long data)
+static bool set_spte_gfn(struct kvm *kvm, struct tdp_iter *iter,
+ struct kvm_gfn_range *range)
{
- struct tdp_iter iter;
- pte_t *ptep = (pte_t *)data;
- kvm_pfn_t new_pfn;
u64 new_spte;
- int need_flush = 0;
-
- rcu_read_lock();
- WARN_ON(pte_huge(*ptep) || (gfn + 1) != end);
+ /* Huge pages aren't expected to be modified without first being zapped. */
+ WARN_ON(pte_huge(range->pte) || range->start + 1 != range->end);
- new_pfn = pte_pfn(*ptep);
-
- tdp_root_for_each_leaf_pte(iter, root, gfn, gfn + 1) {
- if (iter.level != PG_LEVEL_4K)
- continue;
-
- if (!is_shadow_present_pte(iter.old_spte))
- break;
-
- /*
- * Note, when changing a read-only SPTE, it's not strictly
- * necessary to zero the SPTE before setting the new PFN, but
- * doing so preserves the invariant that the PFN of a present
- * leaf SPTE can never change. See __handle_changed_spte().
- */
- tdp_mmu_set_spte(kvm, &iter, 0);
+ if (iter->level != PG_LEVEL_4K ||
+ !is_shadow_present_pte(iter->old_spte))
+ return false;
- if (!pte_write(*ptep)) {
- new_spte = kvm_mmu_changed_pte_notifier_make_spte(
- iter.old_spte, new_pfn);
+ /*
+ * Note, when changing a read-only SPTE, it's not strictly necessary to
+ * zero the SPTE before setting the new PFN, but doing so preserves the
+ * invariant that the PFN of a present * leaf SPTE can never change.
+ * See __handle_changed_spte().
+ */
+ tdp_mmu_set_spte(kvm, iter, 0);
- tdp_mmu_set_spte(kvm, &iter, new_spte);
- }
+ if (!pte_write(range->pte)) {
+ new_spte = kvm_mmu_changed_pte_notifier_make_spte(iter->old_spte,
+ pte_pfn(range->pte));
- need_flush = 1;
+ tdp_mmu_set_spte(kvm, iter, new_spte);
}
- if (need_flush)
- kvm_flush_remote_tlbs_with_address(kvm, gfn, 1);
-
- rcu_read_unlock();
-
- return 0;
+ return true;
}
-int kvm_tdp_mmu_set_spte_hva(struct kvm *kvm, unsigned long address,
- pte_t *host_ptep)
+/*
+ * Handle the changed_pte MMU notifier for the TDP MMU.
+ * data is a pointer to the new pte_t mapping the HVA specified by the MMU
+ * notifier.
+ * Returns non-zero if a flush is needed before releasing the MMU lock.
+ */
+bool kvm_tdp_mmu_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
{
- return kvm_tdp_mmu_handle_hva(kvm, address, (unsigned long)host_ptep,
- set_tdp_spte);
+ bool flush = kvm_tdp_mmu_handle_gfn(kvm, range, set_spte_gfn);
+
+ /* FIXME: return 'flush' instead of flushing here. */
+ if (flush)
+ kvm_flush_remote_tlbs_with_address(kvm, range->start, 1);
+
+ return false;
}
/*
int map_writable, int max_level, kvm_pfn_t pfn,
bool prefault);
-int kvm_tdp_mmu_zap_hva_range(struct kvm *kvm, unsigned long start,
- unsigned long end);
-
-int kvm_tdp_mmu_age_hva_range(struct kvm *kvm, unsigned long start,
- unsigned long end);
-int kvm_tdp_mmu_test_age_hva(struct kvm *kvm, unsigned long hva);
-
-int kvm_tdp_mmu_set_spte_hva(struct kvm *kvm, unsigned long address,
- pte_t *host_ptep);
+bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,
+ bool flush);
+bool kvm_tdp_mmu_age_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range);
+bool kvm_tdp_mmu_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
+bool kvm_tdp_mmu_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm, struct kvm_memory_slot *slot,
int min_level);
#endif
#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+struct kvm_gfn_range {
+ struct kvm_memory_slot *slot;
+ gfn_t start;
+ gfn_t end;
+ pte_t pte;
+ bool may_block;
+};
+bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range);
+bool kvm_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
+bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
+bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range);
+#else
int kvm_unmap_hva_range(struct kvm *kvm,
unsigned long start, unsigned long end, unsigned flags);
int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
+#endif /* KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS */
#endif
enum {
srcu_read_unlock(&kvm->srcu, idx);
}
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+
+typedef bool (*hva_handler_t)(struct kvm *kvm, struct kvm_gfn_range *range);
+
+struct kvm_hva_range {
+ unsigned long start;
+ unsigned long end;
+ pte_t pte;
+ hva_handler_t handler;
+ bool flush_on_ret;
+ bool may_block;
+};
+
+static __always_inline int __kvm_handle_hva_range(struct kvm *kvm,
+ const struct kvm_hva_range *range)
+{
+ struct kvm_memory_slot *slot;
+ struct kvm_memslots *slots;
+ struct kvm_gfn_range gfn_range;
+ bool ret = false;
+ int i, idx;
+
+ lockdep_assert_held_write(&kvm->mmu_lock);
+
+ idx = srcu_read_lock(&kvm->srcu);
+
+ for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
+ slots = __kvm_memslots(kvm, i);
+ kvm_for_each_memslot(slot, slots) {
+ unsigned long hva_start, hva_end;
+
+ hva_start = max(range->start, slot->userspace_addr);
+ hva_end = min(range->end, slot->userspace_addr +
+ (slot->npages << PAGE_SHIFT));
+ if (hva_start >= hva_end)
+ continue;
+
+ /*
+ * To optimize for the likely case where the address
+ * range is covered by zero or one memslots, don't
+ * bother making these conditional (to avoid writes on
+ * the second or later invocation of the handler).
+ */
+ gfn_range.pte = range->pte;
+ gfn_range.may_block = range->may_block;
+
+ /*
+ * {gfn(page) | page intersects with [hva_start, hva_end)} =
+ * {gfn_start, gfn_start+1, ..., gfn_end-1}.
+ */
+ gfn_range.start = hva_to_gfn_memslot(hva_start, slot);
+ gfn_range.end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, slot);
+ gfn_range.slot = slot;
+
+ ret |= range->handler(kvm, &gfn_range);
+ }
+ }
+
+ if (range->flush_on_ret && (ret || kvm->tlbs_dirty))
+ kvm_flush_remote_tlbs(kvm);
+
+ srcu_read_unlock(&kvm->srcu, idx);
+
+ /* The notifiers are averse to booleans. :-( */
+ return (int)ret;
+}
+
+static __always_inline int kvm_handle_hva_range(struct mmu_notifier *mn,
+ unsigned long start,
+ unsigned long end,
+ pte_t pte,
+ hva_handler_t handler)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ const struct kvm_hva_range range = {
+ .start = start,
+ .end = end,
+ .pte = pte,
+ .handler = handler,
+ .flush_on_ret = true,
+ .may_block = false,
+ };
+ int ret;
+
+ KVM_MMU_LOCK(kvm);
+ ret = __kvm_handle_hva_range(kvm, &range);
+ KVM_MMU_UNLOCK(kvm);
+
+ return ret;
+}
+
+static __always_inline int kvm_handle_hva_range_no_flush(struct mmu_notifier *mn,
+ unsigned long start,
+ unsigned long end,
+ hva_handler_t handler)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ const struct kvm_hva_range range = {
+ .start = start,
+ .end = end,
+ .pte = __pte(0),
+ .handler = handler,
+ .flush_on_ret = false,
+ .may_block = false,
+ };
+ int ret;
+
+ KVM_MMU_LOCK(kvm);
+ ret = __kvm_handle_hva_range(kvm, &range);
+ KVM_MMU_UNLOCK(kvm);
+
+ return ret;
+}
+#endif /* KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS */
+
static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address,
pte_t pte)
{
struct kvm *kvm = mmu_notifier_to_kvm(mn);
- int idx;
+#ifndef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+ int idx;
+#endif
trace_kvm_set_spte_hva(address);
/*
*/
WARN_ON_ONCE(!kvm->mmu_notifier_count);
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+ kvm_handle_hva_range(mn, address, address + 1, pte, kvm_set_spte_gfn);
+#else
idx = srcu_read_lock(&kvm->srcu);
KVM_MMU_LOCK(kvm);
KVM_MMU_UNLOCK(kvm);
srcu_read_unlock(&kvm->srcu, idx);
+#endif
}
static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
const struct mmu_notifier_range *range)
{
struct kvm *kvm = mmu_notifier_to_kvm(mn);
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+ const struct kvm_hva_range hva_range = {
+ .start = range->start,
+ .end = range->end,
+ .pte = __pte(0),
+ .handler = kvm_unmap_gfn_range,
+ .flush_on_ret = true,
+ .may_block = mmu_notifier_range_blockable(range),
+ };
+#else
int need_tlb_flush = 0, idx;
+#endif
trace_kvm_unmap_hva_range(range->start, range->end);
+#ifndef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
idx = srcu_read_lock(&kvm->srcu);
+#endif
+
KVM_MMU_LOCK(kvm);
/*
* The count increase must become visible at unlock time as no
kvm->mmu_notifier_range_end =
max(kvm->mmu_notifier_range_end, range->end);
}
+
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+ __kvm_handle_hva_range(kvm, &hva_range);
+#else
need_tlb_flush = kvm_unmap_hva_range(kvm, range->start, range->end,
range->flags);
/* we've to flush the tlb before the pages can be freed */
if (need_tlb_flush || kvm->tlbs_dirty)
kvm_flush_remote_tlbs(kvm);
+#endif
KVM_MMU_UNLOCK(kvm);
+#ifndef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
srcu_read_unlock(&kvm->srcu, idx);
+#endif
return 0;
}
unsigned long start,
unsigned long end)
{
+#ifndef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
struct kvm *kvm = mmu_notifier_to_kvm(mn);
int young, idx;
-
+#endif
trace_kvm_age_hva(start, end);
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+ return kvm_handle_hva_range(mn, start, end, __pte(0), kvm_age_gfn);
+#else
idx = srcu_read_lock(&kvm->srcu);
KVM_MMU_LOCK(kvm);
srcu_read_unlock(&kvm->srcu, idx);
return young;
+#endif
}
static int kvm_mmu_notifier_clear_young(struct mmu_notifier *mn,
unsigned long start,
unsigned long end)
{
+#ifndef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
struct kvm *kvm = mmu_notifier_to_kvm(mn);
int young, idx;
+#endif
trace_kvm_age_hva(start, end);
- idx = srcu_read_lock(&kvm->srcu);
- KVM_MMU_LOCK(kvm);
/*
* Even though we do not flush TLB, this will still adversely
* affect performance on pre-Haswell Intel EPT, where there is
* cadence. If we find this inaccurate, we might come up with a
* more sophisticated heuristic later.
*/
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+ return kvm_handle_hva_range_no_flush(mn, start, end, kvm_age_gfn);
+#else
+ idx = srcu_read_lock(&kvm->srcu);
+ KVM_MMU_LOCK(kvm);
young = kvm_age_hva(kvm, start, end);
KVM_MMU_UNLOCK(kvm);
srcu_read_unlock(&kvm->srcu, idx);
return young;
+#endif
}
static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address)
{
+#ifndef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
struct kvm *kvm = mmu_notifier_to_kvm(mn);
int young, idx;
-
+#endif
trace_kvm_test_age_hva(address);
+#ifdef KVM_ARCH_WANT_NEW_MMU_NOTIFIER_APIS
+ return kvm_handle_hva_range_no_flush(mn, address, address + 1,
+ kvm_test_age_gfn);
+#else
idx = srcu_read_lock(&kvm->srcu);
KVM_MMU_LOCK(kvm);
young = kvm_test_age_hva(kvm, address);
srcu_read_unlock(&kvm->srcu, idx);
return young;
+#endif
}
static void kvm_mmu_notifier_release(struct mmu_notifier *mn,
projects / users / hch / configfs.git / commitdiff