Re: [Qemu-devel] [PATCH] target/s390x: Implement CSST

[Christian Borntraeger]

On 06/19/2017 02:05 PM, David Hildenbrand wrote:
> On 19.06.2017 12:03, David Hildenbrand wrote:
>> On 15.06.2017 22:37, Richard Henderson wrote:
>>> There are no uses in a Linux system with which to test,
>>> but it Looks Right by my reading of the PoO.
>>
>> I am using next.git/master with this patch applied:
>> https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=8aa8680aa383bf6e2ac
>>
>> I am using QEMU with the mvcos patch and your patch applied (and a patch
>> that allows enabling csst/csst2).
>>
>> I am using the following qemu command line:
>>
>> #!/bin/bash
>> /home/dhildenb/git/qemu/s390x-softmmu/qemu-system-s390x \
>>      -nographic -nodefaults -machine s390-ccw-virtio,accel=tcg \
>>      -cpu qemu,mvcos=on,stfle=on,ldisp=on,ldisphp=on,\
>>           eimm=on,stckf=on,csst=on,csst2=on,ginste=on,exrl=on\
>>      -m 256M -smp 1 -chardev stdio,id=con0 \
>>      -device sclpconsole,chardev=con0 \
>>      -kernel vmlinux -initrd /home/dhildenb/initrd.debian
>>
>> Right now, I can start a z9 compiled kernel.
>>
>> When trying to start a z10 compiled kernel (which generates many csst),


I would be very surprised if the kernel would contain any csst. gcc does not
emit csst and the kernel source also does not contain it.