diff mbox

[PULL,6/9] KVM: s390: Fix clock comparator field for STORE STATUS

Message ID 1385647618-15541-7-git-send-email-cornelia.huck@de.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Cornelia Huck Nov. 28, 2013, 2:06 p.m. UTC 
From: Thomas Huth <thuth@linux.vnet.ibm.com>

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>
---
 arch/s390/kvm/kvm-s390.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox

Patch

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),