Hi Bin,
On 09/23/2018 04:42 PM, Bin Meng wrote:
Currently devices on the virtio bus is not automatically enumerated,
which means peripherals on the virtio bus are not discovered by their
drivers. This uses board_init() to do the virtio enumeration.
Signed-off-by: Bin Meng <bmeng...@gmail.com>
---
board/emulation/qemu-arm/Kconfig | 3 +++
board/emulation/qemu-arm/qemu-arm.c | 7 +++++++
2 files changed, 10 insertions(+)
...
diff --git a/board/emulation/qemu-arm/Kconfig b/board/emulation/qemu-arm/Kconfig
index d1c08c2..16b80fe 100644
--- a/board/emulation/qemu-arm/Kconfig
+++ b/board/emulation/qemu-arm/Kconfig
@@ -5,5 +5,8 @@ config SYS_TEXT_BASE
config BOARD_SPECIFIC_OPTIONS # dummy
def_bool y
+ imply VIRTIO_MMIO
+ imply VIRTIO_NET
+ imply VIRTIO_BLK
I think we should have VIRTIO_PCI here as well, so that QEMU command lines
that work on x86 will work on ARM just as well.
...
--- a/board/emulation/qemu-arm/qemu-arm.c
+++ b/board/emulation/qemu-arm/qemu-arm.c
@@ -4,6 +4,7 @@
*/
#include <common.h>
#include <fdtdec.h>
+#include <virtio.h>
#ifdef CONFIG_ARM64
#include <asm/armv8/mmu.h>
@@ -58,6 +59,12 @@ struct mm_region *mem_map = qemu_arm64_mem_map;
int board_init(void)
{
+ /*
+ * Make sure virtio bus is enumerated so that peripherals
+ * on the virtio bus can be discovered by their drivers
+ */
+ virtio_init();
+
return 0;
}
Note that in include/configs/qemu-arm.h, the boards auto-enumerate
PCI devices with a different mechanism, like this:
#define CONFIG_PREBOOT "pci enum"
I am not sure which one is better but at least we should be consistent.
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