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 <b...@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);