[dts] [PATCH] qemu-kvm: Add support to provide Kernel Image explicitly to boot VM

[pvukkisala at marvell.com]

From: Phanendra Vukkisala <pvukkisala at marvell.com>

Enables option to boot VM with Kernel Image which is not part of VM image.
Enables provding kernel boot parameters from configs

Signed-off-by: Phanendra Vukkisala <pvukkisala at marvell.com>
---
 conf/sriov_kvm.cfg    |   10 ++++++++++
 framework/qemu_kvm.py |   26 ++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/conf/sriov_kvm.cfg b/conf/sriov_kvm.cfg
index a7ba884..8106e04 100644
--- a/conf/sriov_kvm.cfg
+++ b/conf/sriov_kvm.cfg
@@ -98,6 +98,16 @@
 #           note:
 #               By default VM will start with the daemonize status.
 #               Not support starting it on the stdin now.
+#
+#kernel 
+#       kernel_img: <path of kernel image>
+#           note: adding kernel_img use this kernel and following argument to as 
+#                 kernel boot command args
+#       console: ttyS0
+#       baudrate: 115200
+#       root: /dev/sda2 rw rootwait
+#           note: along with root path, can provide any other extra parameters
+#
 
 
 # vm configuration for pmd sriov case
diff --git a/framework/qemu_kvm.py b/framework/qemu_kvm.py
index 80a39c8..8408795 100644
--- a/framework/qemu_kvm.py
+++ b/framework/qemu_kvm.py
@@ -483,6 +483,32 @@ class QEMUKvm(VirtBase):
             elif options['type'] in ['tap', 'bridge']:
                 self.net_type = 'bridge'
 
+    def add_vm_kernel(self, **options):
+        """
+        Add Kernel Image explicitly
+        kernel_img: path to kernel Image
+        console: console details in kernel boot args
+        baudrate: console access baudrate in kernel boot args
+        root: root partition details in kernel boot args
+        """
+        print options
+        if 'kernel_img' in options.keys() and options['kernel_img']:
+            kernel_boot_line = '-kernel %s' % options['kernel_img']
+        else:
+            return False
+        self.__add_boot_line(kernel_boot_line)
+        kernel_args = ""
+        if 'console' in options.keys() and options['console']:
+            kernel_args = "console=%s" %options['console']
+            if 'baudrate' in options.keys() and options['baudrate']:
+                kernel_args += "," + options['baudrate']
+        if 'root' in options.keys() and options['root']:
+            kernel_args += " root=%s" %options['root']
+        if kernel_args:
+            append_boot_line = '--append \"%s\"' %kernel_args
+            self.__add_boot_line(append_boot_line)
+            
+
     def __add_vm_net_nic(self, **options):
         """
         type: nic
-- 
1.7.9.5