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Re: [Qemu-devel] [PATCH 4/7] kvm: Add sanity checks to slot management

From: Jan Kiszka
Subject: Re: [Qemu-devel] [PATCH 4/7] kvm: Add sanity checks to slot management
Date: Wed, 29 Apr 2009 12:38:01 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv: Gecko/20080226 SUSE/ Thunderbird/ Mnenhy/

Liu Yu-B13201 wrote:
>> -----Original Message-----
>> From: address@hidden 
>> [mailto:address@hidden 
>> On Behalf Of Jan Kiszka
>> Sent: Sunday, April 12, 2009 1:20 AM
>> To: address@hidden
>> Subject: [Qemu-devel] [PATCH 4/7] kvm: Add sanity checks to 
>> slot management
>> Fail loudly if we run out of memory slot.
>> Make sure that dirty log start/stop works with consistent 
>> memory regions
>> by reporting invalid parameters. This reveals several 
>> inconsistencies in
>> the vga code, patch to fix them follows later in this series.
>> And, for simplicity reasons, also catch and report unaligned memory
>> regions passed to kvm_set_phys_mem (KVM works on page basis).
> Commit d3f8d37fe2d0c24ec8bac9c94d5b0e2dc09c0d2a hurts kvm/powerpc
> The alignment check in kvm_set_phys_mem prevents pci controller and mpic 
> initializing mmio regions.

What is the alignment of those regions then? None? And do regions of
different types overlap even on the same page? Maybe the check reveals
some deeper conflict /wrt KVM. Can you point me to the involved code files?


Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux

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