Re: [Qemu-devel] [PATCH v3] s390x/pci: add common fmb

[Cornelia Huck <cohuck@redhat.com>]

On Fri, 14 Dec 2018 17:53:41 +0100
Pierre Morel <pmorel@linux.ibm.com> wrote:

> After the last review round I worked on endianness.
> Doing this I found some errors in the code and in the interpretation
> of the documentation.
>   
> The new patch changed the following from previous version:
>  
> In s390-pci-bus:
> - Initialize the FMB Format.
>  
> In s390-pci-bus.h 
> - re-organization of the internal counters, having a table for the
>   internal counters.
> 
> In s390-pci-inst.c
> - Internal counters update (LD/ST/STB/RPCIT) is done always.
>   even if the FMB if fmb_addr is NULL.
>   AFAIU this respect the documentation which only states that FMB
>   update is stopped.
> - in mpcifc_service_call(), moved the setting of fmb_addr after
>   the timer has been stopped.
> - fmb_update((), use address_space_stq_be() to handle endianness
>   when storing the FMB.
> - define the format with 32 bits instead of one char and reserved
>   chars, this is easier to handle the FMB copy.
> - No update of the DMA fields inside the FMB, as stipulated by the
>   documentation when format32 is 0.
> 
> Patch is tested (for the good case) on Z(KVM) and X(TCG).

Yes, the values look sane for virtio-pci devices under tcg as well.

Will review and hopefully apply later.

> 
> Yi Min Zhao (1):
>   s390x/pci: add common function measurement block
> 
>  hw/s390x/s390-pci-bus.c  |   4 +-
>  hw/s390x/s390-pci-bus.h  |  29 ++++++++++
>  hw/s390x/s390-pci-inst.c | 141 ++++++++++++++++++++++++++++++++++++++++++++++-
>  hw/s390x/s390-pci-inst.h |   1 +
>  4 files changed, 171 insertions(+), 4 deletions(-)
>