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ppc/pnv: Implement big-core PVR for Power9/10

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Power9/10 CPUs have PVR[51] set in small-core mode and clear in big-core
mode. This is used by skiboot firmware.

PVR is not hypervisor-privileged but it is not so important that spapr
to implement this because it's generally masked out of PVR matching code
in kernels, and only used by firmware.

Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Nicholas Piggin 2024-07-11 18:37:25 +10:00
parent cf0eb929e5
commit 27f61d1b0b
1 changed files with 4 additions and 0 deletions
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4
hw/ppc/pnv_core.c
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@ -58,6 +58,10 @@ static void pnv_core_cpu_reset(PnvCore *pc, PowerPCCPU *cpu)
env->nip = 0x10;
env->msr |= MSR_HVB; /* Hypervisor mode */
env->spr[SPR_HRMOR] = pc->hrmor;
if (pc->big_core) {
/* Clear "small core" bit on Power9/10 (this is set in default PVR) */
env->spr[SPR_PVR] &= ~PPC_BIT(51);
}
hreg_compute_hflags(env);
ppc_maybe_interrupt(env);