Hi,
i'd like to get the following simple patches to the MIPS/mipssim target adding
virtio-mmio devices to it. This makes the target a lot more usefull as microvm
for kernel developement. It currently lives in our qemu extensions patches and
we have a working kernel that supports all virtio devices for it.
Thoughts?
Reinoud Zandijk, NetBSD developer
$NetBSD$
--- hw/mips/Kconfig.orig 2020-08-11 19:17:15.000000000 +0000
+++ hw/mips/Kconfig
@@ -20,6 +20,7 @@ config MIPSSIM
select ISA_BUS
select SERIAL_ISA
select MIPSNET
+ select VIRTIO_MMIO
config JAZZ
bool
$NetBSD$
--- hw/mips/mipssim.c.orig 2020-08-11 19:17:15.000000000 +0000
+++ hw/mips/mipssim.c
@@ -45,6 +45,7 @@
#include "qemu/error-report.h"
#include "sysemu/qtest.h"
#include "sysemu/reset.h"
+#include "hw/virtio/virtio-mmio.h"
static struct _loaderparams {
int ram_size;
@@ -229,6 +230,16 @@ mips_mipssim_init(MachineState *machine)
if (nd_table[0].used)
/* MIPSnet uses the MIPS CPU INT0, which is interrupt 2. */
mipsnet_init(0x4200, env->irq[2], &nd_table[0]);
+
+ /*
+ * virtio extention; register 32 virtio devices just after the ISA space
+ * at 0x1fd10000 with strave of 512 bytes as per i386s microvm target.
+ */
+ for (int i = 0; i < 32; i++) {
+ sysbus_create_simple("virtio-mmio",
+ 0x1fd10000 + i * 512,
+ env->irq[3]);
+ }
}
static void mips_mipssim_machine_init(MachineClass *mc)
