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author | Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> | 2013-02-27 11:44:34 +0100 |
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committer | Marcelo Tosatti <mtosatti@redhat.com> | 2013-03-05 00:21:08 +0100 |
commit | 7b6195a91d60909a2834ab7181e2b9476e6fe749 (patch) | |
tree | 2a3713b45d77bb886e031be65f3ef5f576eeb300 /arch | |
parent | KVM: set_memory_region: Make kvm_mr_change available to arch code (diff) | |
download | linux-7b6195a91d60909a2834ab7181e2b9476e6fe749.tar.xz linux-7b6195a91d60909a2834ab7181e2b9476e6fe749.zip |
KVM: set_memory_region: Refactor prepare_memory_region()
This patch drops the parameter old, a copy of the old memory slot, and
adds a new parameter named change to know the change being requested.
This not only cleans up the code but also removes extra copying of the
memory slot structure.
Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/kvm/arm.c | 4 | ||||
-rw-r--r-- | arch/ia64/kvm/kvm-ia64.c | 4 | ||||
-rw-r--r-- | arch/powerpc/kvm/powerpc.c | 4 | ||||
-rw-r--r-- | arch/s390/kvm/kvm-s390.c | 4 | ||||
-rw-r--r-- | arch/x86/kvm/x86.c | 10 |
5 files changed, 12 insertions, 14 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index 24cb5f66787d..96ebab7a1959 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -230,8 +230,8 @@ int kvm_arch_set_memory_region(struct kvm *kvm, int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, - struct kvm_memory_slot old, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + enum kvm_mr_change change) { return 0; } diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 43701f0c0f71..5c2b07e8c3d6 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -1560,8 +1560,8 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, - struct kvm_memory_slot old, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + enum kvm_mr_change change) { unsigned long i; unsigned long pfn; diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 22b33159fbc4..8aa51cd67c28 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -412,8 +412,8 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, - struct kvm_memory_slot old, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + enum kvm_mr_change change) { return kvmppc_core_prepare_memory_region(kvm, memslot, mem); } diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 07ac302ce246..4288780c86b8 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -974,8 +974,8 @@ int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) /* Section: memory related */ int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, - struct kvm_memory_slot old, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + enum kvm_mr_change change) { /* A few sanity checks. We can have exactly one memory slot which has to start at guest virtual zero and which has to be located at a diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 26216bb4403f..7198234fa088 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6906,23 +6906,21 @@ out_free: int kvm_arch_prepare_memory_region(struct kvm *kvm, struct kvm_memory_slot *memslot, - struct kvm_memory_slot old, - struct kvm_userspace_memory_region *mem) + struct kvm_userspace_memory_region *mem, + enum kvm_mr_change change) { - int npages = memslot->npages; - /* * Only private memory slots need to be mapped here since * KVM_SET_MEMORY_REGION ioctl is no longer supported. */ - if ((memslot->id >= KVM_USER_MEM_SLOTS) && npages && !old.npages) { + if ((memslot->id >= KVM_USER_MEM_SLOTS) && (change == KVM_MR_CREATE)) { unsigned long userspace_addr; /* * MAP_SHARED to prevent internal slot pages from being moved * by fork()/COW. */ - userspace_addr = vm_mmap(NULL, 0, npages * PAGE_SIZE, + userspace_addr = vm_mmap(NULL, 0, memslot->npages * PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0); |