[PATCH 2/2] hw/misc/bcm2835_property: Add dummy Get/Set GPIO virt buf messages

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

Without these the RaspiOS kernel tries to ioremap some bogus address
and dumps a backtrace in the console at boot. These work around it.

The virt-gpio driver still fails to initialize but much more cleanly

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 hw/misc/bcm2835_property.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index b958fa6a5c..62037c0630 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -274,6 +274,13 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             resplen = 4;
             break;
 
+        case 0x00048020: /* Set GPIO virt buf */
+            /* fall through */
+        case 0x00040010: /* Get GPIO virt buf */
+            stl_le_phys(&s->dma_as, value + 12, 0);
+            resplen = 4;
+            break;
+
         case 0x00060001: /* Get DMA channels */
             /* channels 2-5 */
             stl_le_phys(&s->dma_as, value + 12, 0x003C);