Re: [Qemu-devel] [PATCH v2 3/9] s390x: remove s390-virtio devices

[Thomas Huth <thuth@redhat.com>]

 Happy new year!

On 07.01.2016 14:36, Cornelia Huck wrote:
> From: Pierre Morel <pmorel@linux.vnet.ibm.com>
> 
> The s390-virtio machine has been removed; remove the associated devices
> as well.
> 
> hw/s390x/s390-virtio-bus.c and hw/s390x/s390-virtio-bus.h
> have been deleted and removed from hw/s390x/Makefile.objs
> 
> virtio-size has no more meaning for the modern machine
> and has been removed from helper.c and cpu.h
> 
> virtio-serial-s390 belonging to the old machine is
> being removed from vl.c
> 
> Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
> ---
>  hw/s390x/Makefile.objs     |   2 +-
>  hw/s390x/s390-virtio-bus.c | 758 ---------------------------------------------
>  hw/s390x/s390-virtio-bus.h | 186 -----------
>  hw/s390x/s390-virtio.c     |   1 -
>  target-s390x/cpu.h         |   3 -
>  target-s390x/helper.c      |   2 +-
>  vl.c                       |   7 +-
>  7 files changed, 3 insertions(+), 956 deletions(-)
>  delete mode 100644 hw/s390x/s390-virtio-bus.c
>  delete mode 100644 hw/s390x/s390-virtio-bus.h
[...]
> diff --git a/target-s390x/helper.c b/target-s390x/helper.c
> index aa58f39..e23fdeb 100644
> --- a/target-s390x/helper.c
> +++ b/target-s390x/helper.c
> @@ -133,7 +133,7 @@ int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr orig_vaddr,
>      }
>  
>      /* check out of RAM access */
> -    if (raddr > (ram_size + virtio_size)) {
> +    if (raddr > (ram_size)) {

While you're at it, you could remove the parentheses around "ram_size"
here ... I know, you like parentheses, Cornelia ... but here they IMHO
look quite superfluous now...

>          DPRINTF("%s: raddr %" PRIx64 " > ram_size %" PRIx64 "\n", __func__,
>                  (uint64_t)raddr, (uint64_t)ram_size);
>          trigger_pgm_exception(env, PGM_ADDRESSING, ILEN_LATER);
> diff --git a/vl.c b/vl.c
> index 5aaea77..0c69d94 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -227,7 +227,6 @@ static struct {
>      { .driver = "ide-drive",            .flag = &default_cdrom     },
>      { .driver = "scsi-cd",              .flag = &default_cdrom     },
>      { .driver = "virtio-serial-pci",    .flag = &default_virtcon   },
> -    { .driver = "virtio-serial-s390",   .flag = &default_virtcon   },
>      { .driver = "virtio-serial",        .flag = &default_virtcon   },
>      { .driver = "VGA",                  .flag = &default_vga       },
>      { .driver = "isa-vga",              .flag = &default_vga       },
> @@ -2548,11 +2547,7 @@ static int virtcon_parse(const char *devname)
>      }
>  
>      bus_opts = qemu_opts_create(device, NULL, 0, &error_abort);
> -    if (arch_type == QEMU_ARCH_S390X) {
> -        qemu_opt_set(bus_opts, "driver", "virtio-serial-s390", &error_abort);
> -    } else {
> -        qemu_opt_set(bus_opts, "driver", "virtio-serial-pci", &error_abort);
> -    }
> +    qemu_opt_set(bus_opts, "driver", "virtio-serial", &error_abort);

Are you sure you want to change the default value for non-s390 systems
from "virtio-serial-pci" to "virtio-serial", too?
Also, isn't the virtio-ccw variant called "virtio-serial-ccw" instead or
did I miss something?

 Thomas