KVM: s390: Machine Check
Store additional status in the machine check handler, in order to
collect status (such as vector registers) that is not defined by
store status.
Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index c0ae03a..0c045cf 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2031,6 +2031,35 @@
return kvm_s390_store_status_unloaded(vcpu, addr);
}
+/*
+ * store additional status at address
+ */
+int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
+ unsigned long gpa)
+{
+ /* Only bits 0-53 are used for address formation */
+ if (!(gpa & ~0x3ff))
+ return 0;
+
+ return write_guest_abs(vcpu, gpa & ~0x3ff,
+ (void *)&vcpu->run->s.regs.vrs, 512);
+}
+
+int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr)
+{
+ if (!test_kvm_facility(vcpu->kvm, 129))
+ return 0;
+
+ /*
+ * The guest VXRS are in the host VXRs due to the lazy
+ * copying in vcpu load/put. Let's update our copies before we save
+ * it into the save area.
+ */
+ save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs);
+
+ return kvm_s390_store_adtl_status_unloaded(vcpu, addr);
+}
+
static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
{
kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);