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Subject[PATCH v3 07/12] Maintain memslot version number
Date
Code that depends on particular memslot layout can track changes and
adjust to new layout.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
---
include/linux/kvm_host.h | 1 +
virt/kvm/kvm_main.c | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 600baf0..3f5ebc2 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -163,6 +163,7 @@ struct kvm {
spinlock_t requests_lock;
struct mutex slots_lock;
struct mm_struct *mm; /* userspace tied to this vm */
+ u32 memslot_version;
struct kvm_memslots *memslots;
struct srcu_struct srcu;
#ifdef CONFIG_KVM_APIC_ARCHITECTURE
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a5077df..df3325c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -737,6 +737,7 @@ skip_lpage:
slots->memslots[mem->slot] = new;
old_memslots = kvm->memslots;
rcu_assign_pointer(kvm->memslots, slots);
+ kvm->memslot_version++;
synchronize_srcu_expedited(&kvm->srcu);

kvm_arch_commit_memory_region(kvm, mem, old, user_alloc);
--
1.6.5


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