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authorThomas Huth <thuth@linux.vnet.ibm.com>2013-11-13 20:28:18 +0100
committerCornelia Huck <cornelia.huck@de.ibm.com>2013-11-28 11:08:14 +0100
commit178bd789775ab29233e0553155253ec8d73af71f (patch)
tree36f0c7923321096b9a3f807da9afacb088f67bb5 /arch/s390
parente879892c725217a4af1012f31ae56be762473216 (diff)
downloadop-kernel-dev-178bd789775ab29233e0553155253ec8d73af71f.zip
op-kernel-dev-178bd789775ab29233e0553155253ec8d73af71f.tar.gz
KVM: s390: Fix clock comparator field for STORE STATUS
Only the most 7 significant bytes of the clock comparator must be saved to the status area, and the byte at offset 304 has to be zero. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kvm/kvm-s390.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 55eb8de..1bb1dda 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -877,6 +877,7 @@ int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr)
{
unsigned char archmode = 1;
int prefix;
+ u64 clkcomp;
if (addr == KVM_S390_STORE_STATUS_NOADDR) {
if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1))
@@ -920,8 +921,9 @@ int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr)
&vcpu->arch.sie_block->cputm, 8, prefix))
return -EFAULT;
+ clkcomp = vcpu->arch.sie_block->ckc >> 8;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp),
- &vcpu->arch.sie_block->ckc, 8, prefix))
+ &clkcomp, 8, prefix))
return -EFAULT;
if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs),
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