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authorTakuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>2013-07-04 13:40:29 +0900
committerPaolo Bonzini <pbonzini@redhat.com>2013-07-18 12:29:25 +0200
commite59dbe09f8e6fb8f6ee19dc79d1a2f14299e4cd2 (patch)
tree0de53b1ec2901fd34fdaca56770f0757d9e660e1
parent85dfe87e24326c472454cc92313ba8c3b4efe53b (diff)
downloadop-kernel-dev-e59dbe09f8e6fb8f6ee19dc79d1a2f14299e4cd2.zip
op-kernel-dev-e59dbe09f8e6fb8f6ee19dc79d1a2f14299e4cd2.tar.gz
KVM: Introduce kvm_arch_memslots_updated()
This is called right after the memslots is updated, i.e. when the result of update_memslots() gets installed in install_new_memslots(). Since the memslots needs to be updated twice when we delete or move a memslot, kvm_arch_commit_memory_region() does not correspond to this exactly. In the following patch, x86 will use this new API to check if the mmio generation has reached its maximum value, in which case mmio sptes need to be flushed out. Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Acked-by: Alexander Graf <agraf@suse.de> Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/arm/kvm/arm.c4
-rw-r--r--arch/ia64/kvm/kvm-ia64.c4
-rw-r--r--arch/mips/kvm/kvm_mips.c4
-rw-r--r--arch/powerpc/kvm/powerpc.c4
-rw-r--r--arch/s390/kvm/kvm-s390.c4
-rw-r--r--arch/x86/kvm/x86.c4
-rw-r--r--include/linux/kvm_host.h1
-rw-r--r--virt/kvm/kvm_main.c5
8 files changed, 29 insertions, 1 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 741f66a..9c697db 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -219,6 +219,10 @@ long kvm_arch_dev_ioctl(struct file *filp,
return -EINVAL;
}
+void kvm_arch_memslots_updated(struct kvm *kvm)
+{
+}
+
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 5b2dc0d..bdfd878 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1560,6 +1560,10 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
return 0;
}
+void kvm_arch_memslots_updated(struct kvm *kvm)
+{
+}
+
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c
index dd203e5..a7b0445 100644
--- a/arch/mips/kvm/kvm_mips.c
+++ b/arch/mips/kvm/kvm_mips.c
@@ -208,6 +208,10 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
return 0;
}
+void kvm_arch_memslots_updated(struct kvm *kvm)
+{
+}
+
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 6316ee3..ae63ae4 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -420,6 +420,10 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
return kvmppc_core_create_memslot(slot, npages);
}
+void kvm_arch_memslots_updated(struct kvm *kvm)
+{
+}
+
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index ba694d2..a3d797b 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1056,6 +1056,10 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
return 0;
}
+void kvm_arch_memslots_updated(struct kvm *kvm)
+{
+}
+
/* Section: memory related */
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d21bce5..9dd8799 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7019,6 +7019,10 @@ out_free:
return -ENOMEM;
}
+void kvm_arch_memslots_updated(struct kvm *kvm)
+{
+}
+
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ec590ae..c11c7686 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -503,6 +503,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont);
int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
+void kvm_arch_memslots_updated(struct kvm *kvm);
int kvm_arch_prepare_memory_region(struct kvm *kvm,
struct kvm_memory_slot *memslot,
struct kvm_userspace_memory_region *mem,
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 71960fb..a86735d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -731,7 +731,10 @@ static struct kvm_memslots *install_new_memslots(struct kvm *kvm,
update_memslots(slots, new, kvm->memslots->generation);
rcu_assign_pointer(kvm->memslots, slots);
synchronize_srcu_expedited(&kvm->srcu);
- return old_memslots;
+
+ kvm_arch_memslots_updated(kvm);
+
+ return old_memslots;
}
/*
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