linux-kernel - Re: 2.6.23-rc3 - CONFIG

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Message-ID: <46CCCF51.8070709@vmware.com>
Date:	Wed, 22 Aug 2007 17:05:37 -0700
From:	Zachary Amsden <zach@...are.com>
To:	Parag Warudkar <parag.warudkar@...il.com>
CC:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	rusty@...tcorp.com.au, Chris Wright <chrisw@...s-sol.org>,
	Andi Kleen <ak@...e.de>
Subject: Re: 2.6.23-rc3 - CONFIG_VMI broken

Parag Warudkar wrote:
> CONFIG_VMI seems to be broken, but I am not sure when - the last
> kernel I was running was 2.6.22-rc4 which used to boot fine and use
> VMI. Current git with same configuration causes the kernel to reboot
> early. Logs below.
>
> Deselecting CONFIG_VMI and rebuilding allows the kernel to boot normally.
>
> (I am running it on VMWare workstation 6 latest release.)
>
> Thanks
>
> Parag
>
> Linux version 2.6.23-rc3 (root@...ntu) (gcc version 4.1.2 (Ubuntu
> 4.1.2-0ubuntu4)) #4 Mon Aug 13 21:50:06 EDT 2007
> BIOS-provided physical RAM map:
>  BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
>  BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
>  BIOS-e820: 00000000000ca000 - 00000000000cc000 (reserved)
>  BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)
>  BIOS-e820: 0000000000100000 - 000000001fef0000 (usable)
>  BIOS-e820: 000000001fef0000 - 000000001feff000 (ACPI data)
>  BIOS-e820: 000000001feff000 - 000000001ff00000 (ACPI NVS)
>  BIOS-e820: 000000001ff00000 - 0000000020000000 (usable)
>  BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
>  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
>  BIOS-e820: 00000000fffe0000 - 0000000100000000 (reserved)
> console [earlyser0] enabled
> 0MB HIGHMEM available.
> 512MB LOWMEM available.
> found SMP MP-table at 000f6c90
> VMI: Found VMware, Inc. Hypervisor OPROM, API version 3.0, ROM version 1.0
> Reserving virtual address space above 0xfc000000
> Int 14: CR2 fc37e260  err 00000000  EIP fc37e260  CS 00000062  flags 00010006
> Stack: c0490ec7 c04913cb 00000001 00000000 fc001340 c047fff4 c04a6080 c047aa00
>   

I reproduced this, slightly different EIP, but I notice that all 
paravirt-ops function calls are to bogus addresses; the first byte 
appears correct (0xfc00XXXX is in the VMI ROM range), and the extracted 
function addresses in the paravirt_ops struct are correct.  However, it 
looks like the patching of the call instructions went wrong.  Does this 
sound familiar to anyone?

In any case, I think the bug is already fixed.

Zach
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