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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2011-05-15 23:22:04 +0800
committerAvi Kivity <avi@redhat.com>2011-07-12 11:45:03 +0300
commit8b0cedff040b652f3d36b1368778667581b0c140 (patch)
treed1a8d8c7368d96830a0b4d6af7aa652ab5a015d6
parent332b207d65c1d7982489dbb83e5071c95e19eb75 (diff)
downloadlinux-8b0cedff040b652f3d36b1368778667581b0c140.tar.bz2
KVM: use __copy_to_user/__clear_user to write guest page
Simply use __copy_to_user/__clear_user to write guest page since we have already verified the user address when the memslot is set Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
-rw-r--r--arch/x86/kvm/x86.c4
-rw-r--r--virt/kvm/kvm_main.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 51df0b6c891a..0b089860e950 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1388,7 +1388,7 @@ static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
return 1;
kvm_x86_ops->patch_hypercall(vcpu, instructions);
((unsigned char *)instructions)[3] = 0xc3; /* ret */
- if (copy_to_user((void __user *)addr, instructions, 4))
+ if (__copy_to_user((void __user *)addr, instructions, 4))
return 1;
kvm->arch.hv_hypercall = data;
break;
@@ -1415,7 +1415,7 @@ static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
if (kvm_is_error_hva(addr))
return 1;
- if (clear_user((void __user *)addr, PAGE_SIZE))
+ if (__clear_user((void __user *)addr, PAGE_SIZE))
return 1;
vcpu->arch.hv_vapic = data;
break;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 96ebc0679415..087b3f8ca46e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1345,7 +1345,7 @@ int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
addr = gfn_to_hva(kvm, gfn);
if (kvm_is_error_hva(addr))
return -EFAULT;
- r = copy_to_user((void __user *)addr + offset, data, len);
+ r = __copy_to_user((void __user *)addr + offset, data, len);
if (r)
return -EFAULT;
mark_page_dirty(kvm, gfn);
@@ -1405,7 +1405,7 @@ int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
if (kvm_is_error_hva(ghc->hva))
return -EFAULT;
- r = copy_to_user((void __user *)ghc->hva, data, len);
+ r = __copy_to_user((void __user *)ghc->hva, data, len);
if (r)
return -EFAULT;
mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT);