[PATCH v3 kvm/queue 09/16] KVM: Split out common memory invalidation code
STALE1724d
From: Chao Peng <hidden>
Date: 2021-12-23 12:32:22
Also in:
kvm, linux-fsdevel, lkml, qemu-devel
Subsystem:
kernel virtual machine (kvm), the rest · Maintainers:
Paolo Bonzini, Linus Torvalds
Revision v3 of 7 in this series.
Revisions (7)
When fd-based memory is enabled, there will be two types of memory
invalidation:
- memory invalidation from native MMU through mmu_notifier callback
for hva-based memory, and,
- memory invalidation from memfd through memfd_notifier callback for
fd-based memory.
Some code can be shared between these two types of memory invalidation.
This patch moves those shared code into one place so that it can be
used for both CONFIG_MMU_NOTIFIER and CONFIG_MEMFD_NOTIFIER.
Signed-off-by: Yu Zhang <redacted>
Signed-off-by: Chao Peng <redacted>
---
virt/kvm/kvm_main.c | 35 +++++++++++++++++++----------------
1 file changed, 19 insertions(+), 16 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 19736a0013a0..7b7530b1ea1e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c@@ -469,22 +469,6 @@ void kvm_destroy_vcpus(struct kvm *kvm) EXPORT_SYMBOL_GPL(kvm_destroy_vcpus); #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) -static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) -{ - return container_of(mn, struct kvm, mmu_notifier); -} - -static void kvm_mmu_notifier_invalidate_range(struct mmu_notifier *mn, - struct mm_struct *mm, - unsigned long start, unsigned long end) -{ - struct kvm *kvm = mmu_notifier_to_kvm(mn); - int idx; - - idx = srcu_read_lock(&kvm->srcu); - kvm_arch_mmu_notifier_invalidate_range(kvm, start, end); - srcu_read_unlock(&kvm->srcu, idx); -} typedef bool (*gfn_handler_t)(struct kvm *kvm, struct kvm_gfn_range *range);
@@ -611,6 +595,25 @@ static __always_inline int __kvm_handle_useraddr_range(struct kvm *kvm, /* The notifiers are averse to booleans. :-( */ return (int)ret; } +#endif + +#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) +static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) +{ + return container_of(mn, struct kvm, mmu_notifier); +} + +static void kvm_mmu_notifier_invalidate_range(struct mmu_notifier *mn, + struct mm_struct *mm, + unsigned long start, unsigned long end) +{ + struct kvm *kvm = mmu_notifier_to_kvm(mn); + int idx; + + idx = srcu_read_lock(&kvm->srcu); + kvm_arch_mmu_notifier_invalidate_range(kvm, start, end); + srcu_read_unlock(&kvm->srcu, idx); +} static __always_inline int kvm_handle_hva_range(struct mmu_notifier *mn, unsigned long start,
--
2.17.1