On 11/12/12 11:53, Alexander Graf wrote:
>
> On 07.12.2012, at 13:50, Cornelia Huck wrote:
>
>> Add a new virtio transport that uses channel commands to perform
>> virtio operations.
>>
>> Add a new machine type s390-ccw that uses this virtio-ccw transport
>> and make it the default machine for s390.
>>
>> Signed-off-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
>> ---
>> hw/s390-virtio.c | 149 ++++++--
>> hw/s390x/Makefile.objs | 1 +
>> hw/s390x/virtio-ccw.c | 909 +++++++++++++++++++++++++++++++++++++++++++++++++
>> hw/s390x/virtio-ccw.h | 81 +++++
>> trace-events | 4 +
>> 5 files changed, 1124 insertions(+), 20 deletions(-)
>> create mode 100644 hw/s390x/virtio-ccw.c
>> create mode 100644 hw/s390x/virtio-ccw.h
>>
>> diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c
>> index 9e1afb2..f29ff74 100644
>> --- a/hw/s390-virtio.c
>> +++ b/hw/s390-virtio.c
>> @@ -33,6 +33,8 @@
>>
>> #include "hw/s390-virtio-bus.h"
>> #include "hw/s390x/sclp.h"
>> +#include "hw/s390x/css.h"
>> +#include "hw/s390x/virtio-ccw.h"
>>
>> //#define DEBUG_S390
>>
>> @@ -47,6 +49,7 @@
>> #define KVM_S390_VIRTIO_NOTIFY 0
>> #define KVM_S390_VIRTIO_RESET 1
>> #define KVM_S390_VIRTIO_SET_STATUS 2
>> +#define KVM_S390_VIRTIO_CCW_NOTIFY 3
>>
>> #define KERN_IMAGE_START 0x010000UL
>> #define KERN_PARM_AREA 0x010480UL
>> @@ -63,6 +66,7 @@
>>
>> static VirtIOS390Bus *s390_bus;
>> static S390CPU **ipi_states;
>> +VirtioCcwBus *ccw_bus;
>>
>> S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
>> {
>> @@ -76,15 +80,21 @@ S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
>> int s390_virtio_hypercall(CPUS390XState *env, uint64_t mem, uint64_t hypercall)
>> {
>> int r = 0, i;
>> + int cssid, ssid, schid, m;
>> + SubchDev *sch;
>>
>> dprintf("KVM hypercall: %ld\n", hypercall);
>> switch (hypercall) {
>> case KVM_S390_VIRTIO_NOTIFY:
>> if (mem > ram_size) {
>> - VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
>> - mem, &i);
>> - if (dev) {
>> - virtio_queue_notify(dev->vdev, i);
>> + if (s390_bus) {
>> + VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
>> + mem, &i);
>> + if (dev) {
>> + virtio_queue_notify(dev->vdev, i);
>> + } else {
>> + r = -EINVAL;
>> + }
>
> We really want to factor out the DIAG handling code similar to how spapr handles its hypercalls. That way the legacy s390-virtio machine can register a VIRTIO_NOTIFY hypercall that works for it here, while the s390-virtio-ccw machine doesn't.
>
Agreed, but this has nothing to do with virtio-ccw and should be part of a follow-up cleanup. no?
Christian
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