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Bug 234681

Summary: qemu -kernel vmlinuz -initrd initrd.img doesn't work
Product: [Fedora] Fedora Reporter: Scott Tsai <scottt.tw>
Component: qemuAssignee: David Woodhouse <dwmw2>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 6CC: bugzilla, hdegoede, markmc
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-04-01 15:28:16 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Bug Depends On:    
Bug Blocks: 237879    
Attachments:
Description Flags
initrd loading patch for 0.9.0 none

Description Scott Tsai 2007-03-31 01:48:23 EDT
Description of problem:
qemu supports directly loading a linux kernel(-kernel) and an initial
ramdisk(-initrd) when emulating an i386. The initial ramdisk loading part does
not work in the current extras build.

Version-Release number of selected component (if applicable):
qemu-0.8.2-4.fc6

How reproducible:
always

Steps to Reproduce:
1. sudo qemu -kernel /boot/vmlinuz-2.6.20-1.2933.fc6 -initrd
/boot/initrd-2.6.20-1.2933.fc6.img -hda /bin/true

Actual results:
The kernel running inside qemu prints:
checking if image is initramfs...it isn't (bad gzip magic numbers); looks like
an initrd

Expected results:
Successful initramfs load.

Additional info:
The test case above works after the following patch.
It changes INITRD_LOAD_ADDR in hw/pc.c to make qemu load initial ramdisks at a
higher address.

--- hw/pc.c.orig        2007-02-06 07:01:54.000000000 +0800
+++ hw/pc.c     2007-03-31 13:46:41.000000000 +0800
@@ -32,7 +32,7 @@
 #define LINUX_BOOT_FILENAME "linux_boot.bin"
 
 #define KERNEL_LOAD_ADDR     0x00100000
-#define INITRD_LOAD_ADDR     0x00600000
+#define INITRD_LOAD_ADDR     0x00c00000
 #define KERNEL_PARAMS_ADDR   0x00090000
 #define KERNEL_CMDLINE_ADDR  0x00099000
Comment 1 Hans de Goede 2007-04-01 04:10:32 EDT
I've been looking at upstream CVS, and I think that the patch that we actually
want / need for this is:
http://cvs.savannah.nongnu.org/viewcvs/qemu/hw/pc.c?root=qemu&r1=1.71&r2=1.72&makepatch=1&diff_format=u

Scott, can you test this?

David, is it ok with you if I do a new version with this patch once Scott has
confirmed that this fixed his problem?
Comment 2 Hans de Goede 2007-04-01 04:14:42 EDT
*** Bug 191488 has been marked as a duplicate of this bug. ***
Comment 3 Scott Tsai 2007-04-01 10:21:39 EDT
Hans, thanks a lot for the prompt response on a weekend.

The linked to patch works.
I'll attach a slightly modified patch that cleanly applies to qemu-0.9.0 where
the ram_addr_t type was not yet introduced.
Comment 4 Scott Tsai 2007-04-01 10:23:24 EDT
Created attachment 151390 [details]
initrd loading patch for 0.9.0
Comment 5 David Woodhouse 2007-04-01 10:48:31 EDT
(In reply to comment #1)
> David, is it ok with you if I do a new version with this patch once Scott has
> confirmed that this fixed his problem?

Absolutely; thanks.

Comment 6 Hans de Goede 2007-04-01 15:28:16 EDT
I've just finished building 0.9.0-2, which fixes this. It should show up in
extras-devel with the next push.

David, we might want to build this version for FC-6 too, but I'll leave that up
to you (to decide and do).
Comment 7 Kasper Dupont 2007-06-12 16:04:40 EDT
I just ran into this bug. Why is the fix still only in RAWHIDE?