Re: [Qemu-devel] [PATCH 0/9]

[Halil Pasic <pasic@linux.vnet.ibm.com>]

On 08/31/2017 12:04 PM, Cornelia Huck wrote:
> On Wed, 30 Aug 2017 18:36:00 +0200
> Halil Pasic <pasic@linux.vnet.ibm.com> wrote:
> 
>> This series has a character of a refactoring, as the initial motivation
>> was improving readability and reducing complexity.
> 
> But you reduced the cover letter subject too much ;)

Noticed that after sending. The plan was to copy paste
it form the internal version, but I'm no good at copy-pasting.

> 
>>
>> Despite of the original intent the tree first patches buxfixes, and
>> according to Dong Jia the patch-set also has a functional value: for ccw
>> pass-through, he is planing to pass-through the instruction completion
>> information (cc or interruption condition) from the kernel, and this
>> patch set can pretty much be seen as a preparation for that.
> 
> I think the first one (with the precedence fixed as well) is pretty
> uncontroversial, and I'd be happy to queue an updated version.
> 

I will send it as a stand-alone patch (probably today).

>>
>> The basic idea is: tell how to handle an unusual conditon where it's
>> identified, instead of mapping it to an errno (more or less arbitrarily),
>> then possibly mapping these errnos around, to finally (mentally) map the
>> errno back to the condition and take appropriate action. 
>>
>> At the end of the series we also have 125 lines of code less to maintain,
>> and the executable got a bit smaller too.
> 
> I agree with the basic direction, but I think this needs more hashing
> out.
> 

I'm sure we will sort the details out.

>>
>> Halil Pasic (9):
>>   s390x/css: fix cc handling for XSCH
>>   s390x: fix invalid use of cc 1 for SSCH
>>   s390x/css: be more consistent if broken beyond repair
>>   s390x: refactor error handling for SSCH and RSCH
>>   s390x: refactor error handling for XSCH handler
>>   s390x: refactor error handling for CSCH handler
>>   s390x: refactor error handling for HSCH handler
>>   s390x: refactor error handling for MSCH handler
>>   s390x: factor out common ioinst handler logic
>>
>>  hw/s390x/css.c              | 158 ++++++++++++--------------------------
>>  hw/s390x/s390-ccw.c         |   8 +-
>>  hw/vfio/ccw.c               |  32 ++++++--
>>  include/hw/s390x/css.h      |  38 +++++++---
>>  include/hw/s390x/s390-ccw.h |   2 +-
>>  target/s390x/ioinst.c       | 181 ++++++++++----------------------------------
>>  6 files changed, 147 insertions(+), 272 deletions(-)
>>
>