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authorTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>2010-06-23 15:00:29 +0900
committerAvi Kivity <avi@redhat.com>2010-08-01 10:47:16 +0300
commit979586e0b5809c46ebe5d784794a9f6d859b665e (patch)
tree92988306f9aa606b777b219ade16a6f244e4cdef /arch/ia64/kvm
parent4482b06c0459469c101a1da3f4b24594da557f99 (diff)
downloadlinux-979586e0b5809c46ebe5d784794a9f6d859b665e.tar.bz2
KVM: ia64: cleanup kvm_ia64_sync_dirty_log()
kvm_ia64_sync_dirty_log() is a helper function for kvm_vm_ioctl_get_dirty_log() which copies ia64's arch specific dirty bitmap to general one in memslot. So doing sanity checks in this function is unnatural. We move these checks outside of this and change the prototype appropriately. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/ia64/kvm')
-rw-r--r--arch/ia64/kvm/kvm-ia64.c30
1 files changed, 11 insertions, 19 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index d85b5d2d52d1..5cb58655cd5f 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1795,25 +1795,15 @@ void kvm_arch_exit(void)
kvm_vmm_info = NULL;
}
-static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
- struct kvm_dirty_log *log)
+static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
+ struct kvm_memory_slot *memslot)
{
- struct kvm_memory_slot *memslot;
- int r, i;
+ int i;
long base;
unsigned long n;
unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
- r = -EINVAL;
- if (log->slot >= KVM_MEMORY_SLOTS)
- goto out;
-
- memslot = &kvm->memslots->memslots[log->slot];
- r = -ENOENT;
- if (!memslot->dirty_bitmap)
- goto out;
-
n = kvm_dirty_bitmap_bytes(memslot);
base = memslot->base_gfn / BITS_PER_LONG;
@@ -1823,9 +1813,6 @@ static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
dirty_bitmap[base + i] = 0;
}
spin_unlock(&kvm->arch.dirty_log_lock);
- r = 0;
-out:
- return r;
}
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
@@ -1838,10 +1825,16 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
mutex_lock(&kvm->slots_lock);
- r = kvm_ia64_sync_dirty_log(kvm, log);
- if (r)
+ r = -EINVAL;
+ if (log->slot >= KVM_MEMORY_SLOTS)
+ goto out;
+
+ memslot = &kvm->memslots->memslots[log->slot];
+ r = -ENOENT;
+ if (!memslot->dirty_bitmap)
goto out;
+ kvm_ia64_sync_dirty_log(kvm, memslot);
r = kvm_get_dirty_log(kvm, log, &is_dirty);
if (r)
goto out;
@@ -1849,7 +1842,6 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
/* If nothing is dirty, don't bother messing with page tables. */
if (is_dirty) {
kvm_flush_remote_tlbs(kvm);
- memslot = &kvm->memslots->memslots[log->slot];
n = kvm_dirty_bitmap_bytes(memslot);
memset(memslot->dirty_bitmap, 0, n);
}