There are multiple variants of z14, and it appears eoan already has the
base z14 and one variant in its qemu 1:3.1+dfsg-2ubuntu5 package:
CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"),
CPUDEF_INIT(0x3907, 14, 1, 47, 0x08000000U, "z14ZR1", "IBM z14 Model ZR1
GA1"),
Looking in qemu upstream, additional cpu types are available for s390x:
84 CPUDEF_INIT(0x3906, 14, 1, 47, 0x08000000U, "z14", "IBM z14 GA1"),
85 CPUDEF_INIT(0x3906, 14, 2, 47, 0x08000000U, "z14.2", "IBM z14 GA2"),
86 CPUDEF_INIT(0x3907, 14, 1, 47, 0x08000000U, "z14ZR1", "IBM z14 Model
ZR1 GA1"),
87 CPUDEF_INIT(0x8561, 15, 1, 47, 0x08000000U, "gen15a", "IBM 8561 GA1"),
88 CPUDEF_INIT(0x8562, 15, 1, 47, 0x08000000U, "gen15b", "IBM 8562 GA1"),
Can you confirm that I understand correctly that with this bug report,
"z14.2", "IBM z14 GA2" is requested to be added?
Assuming this is true, then this appears to relate to this patchset:
https://patchwork.kernel.org/patch/10803825/
https://patchwork.kernel.org/patch/10803827/
The first patch adds a multiple epoch feature for z14, the latter patch
adds the z14GA2 model
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https://bugs.launchpad.net/bugs/1828038
Title:
[19.10 FEAT] Update hardware CPU Model z14
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