From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: carsteno-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org
Cc: "kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org"
<kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
"Zhang,
Xiantao" <xiantao.zhang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Hollis Blanchard
<hollisb-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Subject: Re: RFC/Patch 1/4 portability: split kvm_vm_ioctl v3
Date: Tue, 30 Oct 2007 04:58:22 +0200 [thread overview]
Message-ID: <47269DCE.30203@qumranet.com> (raw)
In-Reply-To: <47260A64.3010309-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
Carsten Otte wrote:
> Hollis Blanchard wrote:
>> AFAICS, you can just issue two KVM_SET_USER_MEMORY_REGION ioctls in a
>> row, changing 'guest_phys_addr' and leaving 'userspace_addr' the same.
>> That will create an alias.
> That was also my understanding of Avi's comment.
That is indeed what I meant. It's not 100% identical as aliases dirty
logging will go to the underlying slot, whereas with two slots mapping
the same range it's undefined which will get the dirty bits set, but
userspace can probably handle this easily.
--
Any sufficiently difficult bug is indistinguishable from a feature.
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next prev parent reply other threads:[~2007-10-30 2:58 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1193668687.7471.5.camel@cotte.boeblingen.de.ibm.com>
[not found] ` <1193668687.7471.5.camel-WIxn4w2hgUz3YA32ykw5MLlKpX0K8NHHQQ4Iyu8u01E@public.gmane.org>
2007-10-29 15:08 ` RFC/Patch 1/4 portability: split kvm_vm_ioctl v3 Carsten Otte
[not found] ` <1193670516.7471.37.camel-WIxn4w2hgUz3YA32ykw5MLlKpX0K8NHHQQ4Iyu8u01E@public.gmane.org>
2007-10-29 15:11 ` Izik Eidus
[not found] ` <1193670660.4484.26.camel-siXIhNkUrCXckEVJwWePHtCfPAL7FxvL@public.gmane.org>
2007-10-29 15:24 ` Carsten Otte
[not found] ` <4725FB3A.1080609-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2007-10-29 15:54 ` Hollis Blanchard
2007-10-29 16:29 ` Carsten Otte
[not found] ` <47260A64.3010309-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2007-10-29 17:18 ` Izik Eidus
2007-10-30 2:58 ` Avi Kivity [this message]
2007-10-29 15:08 ` RFC/Patch 2/4 portability: move memory segmentation to x86.c Carsten Otte
2007-10-29 15:09 ` RFC/Patch 3/4 portability: move get/set_apic_base " Carsten Otte
2007-10-29 15:09 ` RFC/Patch 4/4 portability: move control register helper functions " Carsten Otte
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