<div dir="ltr">Hi Raghavendra,<div><br></div><div>Thanks for your response.</div><div><br></div><div>Yes that was an issue and I corrected it. But I see kvm is trying to boot the kernel and I still see those tracebacks and it does not do anything after that. It is not giving back the console. </div><div><br></div><div><br></div><div><br></div><div>Some commands I executed </div><div><br></div><div><div>linux/linux_ws$ sudo modprobe kvm-intel</div><div>FATAL: Error inserting kvm_intel (/lib/modules/3.11.0-15-generic/kernel/arch/x86/kvm/kvm-intel.ko): Operation not supported</div><div>rama@ubuntu:~/linux/linux_ws$ </div><div><br></div><div><br></div><div><br></div><div><div>rama@ubuntu:~/linux/linux_ws$ egrep '^flags.*(vmx|svm)' /proc/cpuinfo</div><div>rama@ubuntu:~/linux/linux_ws$ </div></div></div><div><br></div><div><br></div><div><br></div><div>The modified command </div><div><br></div><div>qemu-system-x86_64 -kernel ./arch/x86/boot/bzImage -append "root=/dev/sda"<br></div><div><br></div><div><br></div><div><br></div><div>This is my printf which I am expecting to see using dmsg after kernel bootup. Am I missing something here?</div><div><br></div><div><div>rama@ubuntu:~/linux/linux_ws$ git diff</div><div>diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c</div><div>index cbc330b..3063991 100644</div><div>--- a/drivers/net/ethernet/intel/e1000/e1000_main.c</div><div>+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c</div><div>@@ -937,7 +937,7 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)</div><div> struct net_device *netdev;</div><div> struct e1000_adapter *adapter;</div><div> struct e1000_hw *hw;</div><div>-</div><div>+ </div><div> static int cards_found = 0;</div><div> static int global_quad_port_a = 0; /* global ksp3 port a indication */</div><div> int i, err, pci_using_dac;</div><div>@@ -945,7 +945,8 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)</div><div> u16 tmp = 0;</div><div> u16 eeprom_apme_mask = E1000_EEPROM_APME;</div><div> int bars, need_ioport;</div><div>-</div><div>+ </div><div>+ printk(KERN_DEBUG "I can modify the Linux kernel!\n");</div><div> /* do not allocate ioport bars when not needed */</div><div> need_ioport = e1000_is_need_ioport(pdev);</div><div> if (need_ioport) {</div></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>Thanks and Regards,</div><div>Harisha </div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Oct 15, 2014 at 3:53 PM, Raghavendra <span dir="ltr"><<a href="mailto:arrao@cdac.in" target="_blank">arrao@cdac.in</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Hello,<span class=""><br>
On Wednesday 15 October 2014 03:01 PM, harisha ja wrote:<br>
</span></div><span class="">
<blockquote type="cite">
<div dir="ltr">
<div><br>
</div>
<div class="gmail_quote">
<div dir="ltr">Hi All,
<div><br>
</div>
<div>I am interested in Linux kernel development. I have
subscribed for newbies mail for a while and this is my
first mail to the group. My intention and interest is to
work on network( if possible mm) side of kernel. First of
all thanks for all the kernel developers and the guys here
for contribution to Linux community.</div>
<div><br>
</div>
<div>Here is my doubt. </div>
<div><br>
</div>
<div>1) I downloaded the linux source code and created the
config using make defconfig and created image using make (
I did not do make install as I want test it with kvm)</div>
<div><br>
</div>
<div>I have windows 7 system and I have installed ubuntu
using vmware. I have installed KVM on ubuntu and I am
trying to boot the kernal image with KVM. But I am not
sure what is the problem. I am stuck in this screen. Is
something I am missing here? </div>
<div><br>
</div>
<div>The approach using kvm to put some logs and to see
module initialization is wrong?. </div>
<div><br>
</div>
<div>The command I am using </div>
<div>
<div>kvm -kernel ./arch/x86/boot/bzImage -append
root=/root/</div>
</div>
</div>
</div>
</div>
</blockquote></span>
Along with the kernel, you must also specify the file system image.
A simple invoking of the command could be something like this :<br>
$ kvm -hda file_system.img -kernel bzImage -append "root=/dev/sda1"<span class=""><br>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_quote">
<div dir="ltr">
<div><br>
</div>
<div><br>
</div>
<div>I see the below message and then the qemu prompt does
not boot and stops by displaying below traceback.</div>
<div><br>
</div>
<div>
<pre style="margin-top:0px;margin-bottom:10px;padding:5px;border:0px;font-size:14px;vertical-align:baseline;background-color:rgb(238,238,238);font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;overflow:auto;width:auto;max-height:600px;word-wrap:normal;color:rgb(0,0,0);line-height:17.804800033569336px"><code style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;white-space:inherit">Could not access KVM kernel module: No such file or directory
failed to initialize KVM: No such file or directory</code></pre>
</div>
<div><br>
</div>
</div>
</div>
</div>
</blockquote></span>
That's fine. QEMU uses something called as tcg accelerator to get
the job done.<span class=""><br>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_quote">
<div dir="ltr">
<div>
<div><br>
</div>
<div><br>
</div>
<div>QEMU </div>
<div>5.1654731 Stack: 5.1654731 c18ea844 claea9a0 00000000
fffffffa d?861efc 00008001 d?8611 a35f91 5.1654731
cl8ddba8 d?861efc d7861efc fffffffa 00000000 d7b6e000
cl8dd6 ff3dc0 5.1654731 d7b6e000 6e6b6e75 2d6e??61 636f
6c62 2c30286b c1002930 d78611 13c248 5.1654731 </div>
<div>Call Trace: </div>
<div>5.1654731 l<c1a35f91>1
mount_block_root+Ox158/0x1de </div>
<div>5.1654731 l<c1002930>1 ?
do_general_protection+0x40/0x170 </div>
<div>5.1654731 l<c113c248>1 ? SyS_mknod+0x28/0x30 </div>
<div>5.1654731 l<cla3610a>1 mount_root+Oxf3/Oxfb </div>
<div>5.1654731 l<c1a36235>1
prepare_namespace+0x123/0x167 </div>
<div>5.1654731 l<c112cf30>l ? SyS_access+0x20/0x30 </div>
<div>5.1654731 l<cla35cf7>1
kernel_init_freeable+Ox1b5/0x1c2 </div>
<div>5.1654731 l<c1a35545>1 ?
do_early_param+0x74/0x74 </div>
<div>5.1654731 l<c174caab>1 kernel_init+Oxb/Oxe0</div>
<div>5.1654731 l<c175a041>1
ret_from_kernel_thread+0x21/0x30 </div>
<div>5.1654731 l<c174caa0>1 ? rest_init+0x60/0x60</div>
<div>5.1654731 Code: 00 00 00 00 31 ff 83 3d 8c a9 ae cl
00 74 05 e8 Oe dO 9 c? 44 24 04 a0 a9 ae cl c7 04 24 44
a8 Be cl e8 b6 05 00 00 fb 3116 <35>1 15 83 75 f0
01 8b 45 f0 ff 15 80 a9 ae cl 01 c6 8d be 5.1654731 EIP:
l<c174f2e9>1 panic+0x165/0x197 SS:ESP
0068:d7861eb8 5.1654731 --I end trace a4Obaf277b417d8d
1-- <br>
</div>
</div>
</div>
</div>
</div>
</blockquote></span>
This is probably because of the file system issue that I've
mentioned previously.<br>
<blockquote type="cite">
<div dir="ltr">
<div class="gmail_quote">
<div dir="ltr">
<div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Thanks</div>
<div>Harish </div>
</div>
</div>
<br>
</div>
<br>
<fieldset></fieldset>
<br>
<pre>_______________________________________________
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</pre>
</blockquote>
<br>
Raghavendra<br>
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</blockquote></div><br></div>