Re: [Qemu-devel] [PATCH v1 0/3] s390x: SIGP + IRQ preparations for TCG vector register support

[Cornelia Huck <cohuck@redhat.com>]

On Fri, 22 Feb 2019 09:11:50 +0100
David Hildenbrand <david@redhat.com> wrote:

> These are minor preparations for vector instruction support for TCG, also
> touching KVM code.
> 
> During SIGP STORE ADDITIONAL STATUS we have to properly convert the
> endianess. On machine checks, we have to also store the vector registers
> into the extended save area.
> 
> Both changes are not used by TCG code before we implement + enable
> vector instructions. KVM code shares the SIGP STORE ADDITIONAL STATUS
> implementation.
> 
> Note: Vector registers (128 bit) are modeled as two 64 bit values. Low and
> high 64 bit values correspond on big/little systems, however the values
> themself need conversion. Documentation for that will be added along with
> the actual vector instruction support.
> 
> David Hildenbrand (3):
>   s390x: Use cpu_to_be64 in SIGP STORE ADDITIONAL STATUS
>   s390x: use a QEMU-style typedef + name for SIGP save area struct
>   s390x/tcg: Save vregs to extended mchk save area
> 
>  target/s390x/excp_helper.c | 46 ++++++++++++++++++++++++++++++++++++--
>  target/s390x/helper.c      | 39 ++++++++++++++++++++------------
>  target/s390x/internal.h    |  4 +++-
>  3 files changed, 72 insertions(+), 17 deletions(-)
> 

Thanks, applied.