On 06/23/2010 09:01 AM, Takuya Yoshikawa wrote:
kvm_get_dirty_log() is a helper function for kvm_vm_ioctl_get_dirty_log() which
is currently used by ia64 and ppc and the following is what it is doing:
- sanity checks
- bitmap scan to check if the slot is dirty
- copy_to_user()
Considering the fact that x86 is not using this anymore and sanity checks must
be done before kvm_ia64_sync_dirty_log(), we can say that this is not working
for code sharing effectively. So we just remove this.
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 801d9f3..bea6f7c 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -1185,28 +1185,43 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
struct kvm_memory_slot *memslot;
struct kvm_vcpu *vcpu;
ulong ga, ga_end;
- int is_dirty = 0;
- int r;
+ unsigned long is_dirty = 0;
+ int r, i;
unsigned long n;
mutex_lock(&kvm->slots_lock);
- r = kvm_get_dirty_log(kvm, log,&is_dirty);
- if (r)
+ r = -EINVAL;
+ if (log->slot>= KVM_MEMORY_SLOTS)
+ goto out;
+
+ memslot =&kvm->memslots->memslots[log->slot];
Not introduced by this patch, but shouldn't this use rcu_dereference()?
--
error compiling committee.c: too many arguments to function
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html