booting kernel with kvm
harisha ja
harisha.ja at gmail.com
Wed Oct 15 13:57:55 EDT 2014
Hi Raghavendra,
Thanks for your response.
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.
Some commands I executed
linux/linux_ws$ sudo modprobe kvm-intel
FATAL: Error inserting kvm_intel
(/lib/modules/3.11.0-15-generic/kernel/arch/x86/kvm/kvm-intel.ko):
Operation not supported
rama at ubuntu:~/linux/linux_ws$
rama at ubuntu:~/linux/linux_ws$ egrep '^flags.*(vmx|svm)' /proc/cpuinfo
rama at ubuntu:~/linux/linux_ws$
The modified command
qemu-system-x86_64 -kernel ./arch/x86/boot/bzImage -append "root=/dev/sda"
This is my printf which I am expecting to see using dmsg after kernel
bootup. Am I missing something here?
rama at ubuntu:~/linux/linux_ws$ git diff
diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c
b/drivers/net/ethernet/intel/e1000/e1000_main.c
index cbc330b..3063991 100644
--- a/drivers/net/ethernet/intel/e1000/e1000_main.c
+++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
@@ -937,7 +937,7 @@ static int e1000_probe(struct pci_dev *pdev, const
struct pci_device_id *ent)
struct net_device *netdev;
struct e1000_adapter *adapter;
struct e1000_hw *hw;
-
+
static int cards_found = 0;
static int global_quad_port_a = 0; /* global ksp3 port a indication
*/
int i, err, pci_using_dac;
@@ -945,7 +945,8 @@ static int e1000_probe(struct pci_dev *pdev, const
struct pci_device_id *ent)
u16 tmp = 0;
u16 eeprom_apme_mask = E1000_EEPROM_APME;
int bars, need_ioport;
-
+
+ printk(KERN_DEBUG "I can modify the Linux kernel!\n");
/* do not allocate ioport bars when not needed */
need_ioport = e1000_is_need_ioport(pdev);
if (need_ioport) {
Thanks and Regards,
Harisha
On Wed, Oct 15, 2014 at 3:53 PM, Raghavendra <arrao at cdac.in> wrote:
> Hello,
> On Wednesday 15 October 2014 03:01 PM, harisha ja wrote:
>
>
> Hi All,
>
> 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.
>
> Here is my doubt.
>
> 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)
>
> 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?
>
> The approach using kvm to put some logs and to see module initialization
> is wrong?.
>
> The command I am using
> kvm -kernel ./arch/x86/boot/bzImage -append root=/root/
>
> Along with the kernel, you must also specify the file system image. A
> simple invoking of the command could be something like this :
> $ kvm -hda file_system.img -kernel bzImage -append "root=/dev/sda1"
>
>
>
> I see the below message and then the qemu prompt does not boot and stops
> by displaying below traceback.
>
> Could not access KVM kernel module: No such file or directory
> failed to initialize KVM: No such file or directory
>
>
> That's fine. QEMU uses something called as tcg accelerator to get the
> job done.
>
>
>
> QEMU
> 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
> Call Trace:
> 5.1654731 l<c1a35f91>1 mount_block_root+Ox158/0x1de
> 5.1654731 l<c1002930>1 ? do_general_protection+0x40/0x170
> 5.1654731 l<c113c248>1 ? SyS_mknod+0x28/0x30
> 5.1654731 l<cla3610a>1 mount_root+Oxf3/Oxfb
> 5.1654731 l<c1a36235>1 prepare_namespace+0x123/0x167
> 5.1654731 l<c112cf30>l ? SyS_access+0x20/0x30
> 5.1654731 l<cla35cf7>1 kernel_init_freeable+Ox1b5/0x1c2
> 5.1654731 l<c1a35545>1 ? do_early_param+0x74/0x74
> 5.1654731 l<c174caab>1 kernel_init+Oxb/Oxe0
> 5.1654731 l<c175a041>1 ret_from_kernel_thread+0x21/0x30
> 5.1654731 l<c174caa0>1 ? rest_init+0x60/0x60
> 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--
>
> This is probably because of the file system issue that I've mentioned
> previously.
>
>
>
>
>
>
>
> Thanks
> Harish
>
>
>
> _______________________________________________
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>
>
> Raghavendra
>
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