[PATCH v2 2/6] spapr/xive: Add a warning when StoreEOI is activated on POWER8 CPUs

[Cédric Le Goater]

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/ppc/spapr_caps.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index 57c62c22e4cc..b0a9d0227db2 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -535,6 +535,14 @@ static void cap_storeeoi_apply(SpaprMachineState *spapr, 
uint8_t val,
         return; /* Disabled by default */
     }
 
+    /* For POWER8 CPUs, setting StoreEOI is useless as XIVE is not used */
+    if (!ppc_type_check_compat(machine->cpu_type, CPU_POWERPC_LOGICAL_3_00, 0,
+                               spapr->max_compat_pvr)) {
+        warn_report("StoreEOI is for the XIVE interrupt mode "
+                    "(POWER9 and above)");
+        return;
+    }
+
     /* Check host support when the KVM device is in use */
     if (kvm_irqchip_in_kernel()) {
         if (!kvm_storeeoi) {
-- 
2.25.4