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 <c...@redhat.com>
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
hw/ppc/pnv_core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/ppc/pnv_core.c b/hw/ppc/pnv_core.c
index 6dc05534d7..43cfeaa2d4 100644
--- a/hw/ppc/pnv_core.c
+++ b/hw/ppc/pnv_core.c
@@ -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);
--
2.45.2
