As we boot to '/bin/sh' by default, enable kernel DHCP autoconfiguration too.
The guest kernel needs to be configured with the following configuration
options:

  CONFIG_IP_PNP=y
  CONFIG_IP_PNP_DHCP=y

Cc: Asias He <[email protected]>
Cc: Avi Kivity <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Prasad Joshi <[email protected]>
Cc: Sasha Levin <[email protected]>
Signed-off-by: Pekka Enberg <[email protected]>
---
 tools/kvm/README        |    3 +++
 tools/kvm/builtin-run.c |    2 +-
 2 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/tools/kvm/README b/tools/kvm/README
index 5b85461..2cf9364 100644
--- a/tools/kvm/README
+++ b/tools/kvm/README
@@ -70,6 +70,9 @@ linux-0.2.img.bz2
  - For virtio-rng device (--rng):
        CONFIG_HW_RANDOM_VIRTIO=y
 
+ - For kernel DHCP autoconf (when booting to /bin/sh):
+       CONFIG_IP_PNP=y
+       CONFIG_IP_PNP_DHCP=y
 
 5. And finally, launch the hypervisor:
 
diff --git a/tools/kvm/builtin-run.c b/tools/kvm/builtin-run.c
index fa5de27..af7f59c 100644
--- a/tools/kvm/builtin-run.c
+++ b/tools/kvm/builtin-run.c
@@ -601,7 +601,7 @@ int kvm_cmd_run(int argc, const char **argv, const char 
*prefix)
                using_rootfs = 1;
 
                if (!strstr(real_cmdline, "init="))
-                       strlcat(real_cmdline, " init=/bin/sh ", 
sizeof(real_cmdline));
+                       strlcat(real_cmdline, " init=/bin/sh ip=dhcp ", 
sizeof(real_cmdline));
        }
 
        if (!strstr(real_cmdline, "root="))
-- 
1.7.0.4

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