Re: [PATCH] configure: Remove s390 (31-bit mode) from the list of supported CPUs

[Thomas Huth <thuth@redhat.com>]

On 30/09/2019 09.51, David Hildenbrand wrote:
> On 28.09.19 21:03, Thomas Huth wrote:
>> On IBM Z, KVM in the kernel is only implemented for 64-bit mode, and
>> with regards to TCG, we also only support 64-bit host CPUs (see the
>> check at the beginning of tcg/s390/tcg-target.inc.c), so we should
>> remove s390 (without "x", i.e. the old 31-bit mode CPUs) from the
>> list of supported CPUs.
>>
>> Signed-off-by: Thomas Huth <thuth@redhat.com>
>> ---
>>  configure | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/configure b/configure
>> index 397bb476e1..a4488c6705 100755
>> --- a/configure
>> +++ b/configure
>> @@ -728,7 +728,7 @@ ARCH=
>>  # Normalise host CPU name and set ARCH.
>>  # Note that this case should only have supported host CPUs, not guests.
>>  case "$cpu" in
>> -  ppc|ppc64|s390|s390x|sparc64|x32|riscv32|riscv64)
>> +  ppc|ppc64|s390x|sparc64|x32|riscv32|riscv64)
>>      supported_cpu="yes"
>>    ;;
>>    ppc64le)
>>
> 
> Not sure if that ever worked

I think it likely worked with dyngen (the predecessor of TCG), see
commit fb3e5849bb1 ... but I think it's broken since QEMU switched from
dyngen to TCG.

 Thomas