[linux-yocto] [kernel-cache][PATCHv2 1/1] bsp/beaglebone: support qemu -machine virt

[Adrian Freihofer]

Purpose: Support booting a beaglebone image with runqemu.

If the kernel supports Qemu's virt machine, runqemu works almost for free.
The device tree for machine virt is included in Qemu, which simplifies
everything quite a bit.
This change adds ARCH_VIRT=y and some drivers to the beaglebone kernel
configuration which allows to:

  export MACHINE="beaglebone-yocto"
  bitbake core-image-minimale
  runqemu

This also works out of an eSDK. Whithout this feature usually two different
SDKs need to be compiled and maintained. One SDK is used for development
in Qemu, another one is used to develop for the real target hardware.

[Yocto #13384]

Signed-off-by: Adrian Freihofer <adrian.freihofer at siemens.com>
---
 bsp/beaglebone/beaglebone.scc | 5 +++++
 bsp/beaglebone/qemu-bb.cfg    | 9 +++++++++
 bsp/beaglebone/qemu-bb.scc    | 1 +
 3 files changed, 15 insertions(+)
 create mode 100644 bsp/beaglebone/qemu-bb.cfg
 create mode 100644 bsp/beaglebone/qemu-bb.scc

diff --git a/bsp/beaglebone/beaglebone.scc b/bsp/beaglebone/beaglebone.scc
index 4b15ec06..2a5e67b1 100644
--- a/bsp/beaglebone/beaglebone.scc
+++ b/bsp/beaglebone/beaglebone.scc
@@ -5,3 +5,8 @@ include features/usb-net/usb-net.scc
 include features/input/input.scc
 include cfg/usb-mass-storage.scc
 include wifi.scc
+
+# With these addons, runqemu just works (-machine virt)
+# The size of the zImage is increased by 168k for kernel 5.0.
+include cfg/virtio.scc
+include qemu-bb.scc
diff --git a/bsp/beaglebone/qemu-bb.cfg b/bsp/beaglebone/qemu-bb.cfg
new file mode 100644
index 00000000..28b3d4ec
--- /dev/null
+++ b/bsp/beaglebone/qemu-bb.cfg
@@ -0,0 +1,9 @@
+CONFIG_ARCH_VIRT=y
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_SPI=y
+CONFIG_SPI_PL022=y
+CONFIG_ARM_SP805_WATCHDOG=y
+CONFIG_RTC_DRV_PL031=y
+CONFIG_PL330_DMA=y
+CONFIG_ARM_TIMER_SP804=y
diff --git a/bsp/beaglebone/qemu-bb.scc b/bsp/beaglebone/qemu-bb.scc
new file mode 100644
index 00000000..8bbcae8d
--- /dev/null
+++ b/bsp/beaglebone/qemu-bb.scc
@@ -0,0 +1 @@
+kconf hardware qemu-bb.cfg
-- 
2.11.0