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ppc: Add has_smt_siblings property to CPUPPCState

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The decision to branch out to a slower SMT path in instruction
emulation will become a bit more complicated with the way that
"big-core" topology that will be implemented in subsequent changes.
Hide these details from the wider CPU emulation code with a bool
has_smt_siblings flag that can be set by machine initialisation.

Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Nicholas Piggin 2024-06-18 12:56:53 +10:00
parent 50d8cfb949
commit 59c921f229
3 changed files with 14 additions and 4 deletions
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3
hw/ppc/pnv_core.c
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@ -288,6 +288,9 @@ static void pnv_core_realize(DeviceState *dev, Error **errp)
cpu = POWERPC_CPU(obj);
pc->threads[i] = POWERPC_CPU(obj);
if (cc->nr_threads > 1) {
cpu->env.has_smt_siblings = true;
}
snprintf(name, sizeof(name), "thread[%d]", i);
object_property_add_child(OBJECT(pc), name, obj);