spapr: enable XIVE MMIOs at reset

Depending on the interrupt mode of the machine, enable or disable the
XIVE MMIOs.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 9 insertions, 0 deletions

diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index d110b8c..5fce72f 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -375,6 +375,9 @@ static void spapr_irq_reset_xive(sPAPRMachineState *spapr, Error **errp)
         /* (TCG) Set the OS CAM line of the thread interrupt context. */
         spapr_xive_set_tctx_os_cam(cpu->tctx);
     }
+
+    /* Activate the XIVE MMIOs */
+    spapr_xive_mmio_set_enabled(spapr->xive, true);
 }
 
 static void spapr_irq_set_irq_xive(void *opaque, int srcno, int val)
@@ -549,6 +552,12 @@ static int spapr_irq_post_load_dual(sPAPRMachineState *spapr, int version_id)
 
 static void spapr_irq_reset_dual(sPAPRMachineState *spapr, Error **errp)
 {
+    /*
+     * Deactivate the XIVE MMIOs. The XIVE backend will reenable them
+     * if selected.
+     */
+    spapr_xive_mmio_set_enabled(spapr->xive, false);
+
     spapr_irq_current(spapr)->reset(spapr, errp);
 }