[PATCH] Compile fixes for 32-bit targets (trivial), questions

[PATCH] Compile fixes for 32-bit targets (trivial), questions

[Simon Kagstrom]

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Hello!

I wanted to try out KVM and followed the HOWTO. It worked fine, except
for two things:

  * libuuid-dev is needed for qemu, which would be good if added to
    the prerequisites

  * The build of kvm.ko failed since load_TR_desc() was not defined
    (I've been building for a 32-bit target). The patch below fixes
    that, if the development branch does not already fix this

Booting and old harddisk image I had worked fine with
/usr/local/kvm/bin/qemu-system-x86_64, but it did so even without the
kvm module (on a x86_64 this was not the case), so it seems that the
32-bit version doesn't really do very much yet.

// Simon


[-- Attachment #2: load_TR_desc.patch --]
[-- Type: application/octet-stream, Size: 297 bytes --]

--- orig/kvm-module/kvm_main.c	2006-10-30 16:37:39.000000000 +0100
+++ kvm-module/kvm_main.c	2006-11-08 15:51:23.000000000 +0100
@@ -30,6 +30,7 @@
 #include <linux/debugfs.h>
 #include <linux/highmem.h>
 #include <linux/file.h>
+#include <asm/desc.h>
 
 #include "vmx.h"
 #include "x86_emulate.h"

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Re: [PATCH] Compile fixes for 32-bit targets (trivial), questions

[Avi Kivity]

Simon Kagstrom wrote:
> Hello!
>
> I wanted to try out KVM and followed the HOWTO. It worked fine, except
> for two things:
>
>   * libuuid-dev is needed for qemu, which would be good if added to
>     the prerequisites
>   

Will do.

>   * The build of kvm.ko failed since load_TR_desc() was not defined
>     (I've been building for a 32-bit target). The patch below fixes
>     that, if the development branch does not already fix this
>   

Applied, thanks.

> Booting and old harddisk image I had worked fine with
> /usr/local/kvm/bin/qemu-system-x86_64, but it did so even without the
> kvm module (on a x86_64 this was not the case), so it seems that the
> 32-bit version doesn't really do very much yet.
>   

I think it wants the regular qemu binary (named qemu) for 32-bit.  The 
instructions are 64-bit specific.  I'll check and update.

You can detect kvm operation using lsof -p `pgrep qemu` (which should 
show /dev/kvm opened) and using top (guest time shows as system time).

-- 
error compiling committee.c: too many arguments to function


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