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| author | Nicholas Piggin <npiggin@gmail.com> | 2023-06-22 19:33:55 +1000 |
|---|---|---|
| committer | Cédric Le Goater <clg@kaod.org> | 2023-06-25 22:41:30 +0200 |
| commit | dc5e072188ea622071bab47c4f899817d6ef1295 (patch) | |
| tree | 134ba5eddeae653d47c5057817695d08a1f2c2e3 /semihosting | |
| parent | 516cd737330a9b4d90a66136ebf738c4653b4e78 (diff) | |
spapr: TCG allow up to 8-thread SMT on POWER8 and newer CPUs
PPC TCG supports SMT CPU configurations for non-hypervisor state, so
permit POWER8-10 pseries machines to enable SMT.
This requires PIR and TIR be set, because that's how sibling thread
matching is done by TCG.
spapr's nested-HV capability does not currently coexist with SMT, so
that combination is prohibited (interestingly somewhat analogous to
LPAR-per-core mode on real hardware which also does not support KVM).
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
[ clg: Also test smp_threads when checking for POWER8 CPU and above ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Diffstat (limited to 'semihosting')
0 files changed, 0 insertions, 0 deletions