[S390] cleanup lowcore access from external interrupts

Read external interrupts parameters from the lowcore in the first
level interrupt handler in entry[64].S.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c
index 5a46b8c5d68a..375aeeaf9ea5 100644
--- a/drivers/s390/kvm/kvm_virtio.c
+++ b/drivers/s390/kvm/kvm_virtio.c
@@ -372,21 +372,22 @@ static void hotplug_devices(struct work_struct *dummy)
 /*
  * we emulate the request_irq behaviour on top of s390 extints
  */
-static void kvm_extint_handler(u16 code)
+static void kvm_extint_handler(unsigned int ext_int_code,
+                               unsigned int param32, unsigned long param64)
 {
         struct virtqueue *vq;
         u16 subcode;
         u32 param;
 
-        subcode = S390_lowcore.cpu_addr;
+        subcode = ext_int_code >> 16;
         if ((subcode & 0xff00) != VIRTIO_SUBCODE_64)
                 return;
 
         /* The LSB might be overloaded, we have to mask it */
-        vq = (struct virtqueue *)(S390_lowcore.ext_params2 & ~1UL);
+        vq = (struct virtqueue *)(param64 & ~1UL);
 
         /* We use ext_params to decide what this interrupt means */
-        param = S390_lowcore.ext_params & VIRTIO_PARAM_MASK;
+        param = param32 & VIRTIO_PARAM_MASK;
 
         switch (param) {
         case VIRTIO_PARAM_CONFIG_CHANGED: