On Fri, 8 Sep 2017 11:21:57 +0200 Halil Pasic <pa...@linux.vnet.ibm.com> wrote:
> On 09/08/2017 05:41 AM, Dong Jia Shi wrote: > > Let' me summarize here, in case I misunderstand things. Now we have > > two ways to choose: > > > > A. Kernel: no change. > > Qemu : handle -EFAULT as option 2 by generating a program check. > > > > B. Kernel: return -EFAULT > > + > > update the IRB area in the I/O region for option 1 to present > > a unit check SCSW (with proper sense byte ECW), and for option > > 2 to present a program check. > > Qemu : handle -EFAULT according to the information that the IRB area > > provided. > > This is not what I was trying to say. You got my message regarding A, but > B was supposed to be understood like this. > > Keep the current handling for option 1, that is return -EFAULT. For option > 2 do what the spec says, execute the program until the bad address and then > generate a program-check (SCSW) once the bad stuff has it's turn. Thus > the only change in QEMU would be handling -EFAULT with an unit check (because > now it's just option 1). That makes sense to me.
