From 178bd789775ab29233e0553155253ec8d73af71f Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Wed, 13 Nov 2013 20:28:18 +0100 Subject: [PATCH] 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 Reviewed-by: Cornelia Huck Signed-off-by: Cornelia Huck --- arch/s390/kvm/kvm-s390.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 55eb8dec2a7..1bb1ddaf93c 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), -- 2.46.0