From: Marcelo Tosatti <mtosatti@redhat.com>
To: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Avi Kivity <avi.kivity@gmail.com>, Gleb Natapov <gleb@redhat.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: Re: [PATCH v2 03/12] KVM: MMU: simplify mmu_set_spte
Date: Mon, 28 Jan 2013 22:21:51 -0200 [thread overview]
Message-ID: <20130129002151.GB10814@amt.cnet> (raw)
In-Reply-To: <50FFB5E9.2010500@linux.vnet.ibm.com>
On Wed, Jan 23, 2013 at 06:05:29PM +0800, Xiao Guangrong wrote:
> In order to detecting spte remapping, we can simply check whether the
> spte has already been pointing to the pfn even if the spte is not the
> last spte, for middle spte is pointing to the kernel pfn which can not
> be mapped to userspace
This check is detecting spte overwrite, when a large spte is replaced by
pointer to spte table.
Can't see why check for different pfn is safe: only 'int level' can
differ, and pfn be equivalent, for example.
next prev parent reply other threads:[~2013-01-29 0:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-23 10:04 [PATCH v2 01/12] KVM: MMU: lazily drop large spte Xiao Guangrong
2013-01-23 10:04 ` [PATCH v2 02/12] KVM: MMU: cleanup mapping-level Xiao Guangrong
2013-01-23 10:05 ` [PATCH v2 03/12] KVM: MMU: simplify mmu_set_spte Xiao Guangrong
2013-01-29 0:21 ` Marcelo Tosatti [this message]
2013-01-29 2:55 ` Xiao Guangrong
2013-01-29 21:53 ` Marcelo Tosatti
2013-01-30 3:22 ` Xiao Guangrong
2013-01-23 10:06 ` [PATCH v2 04/12] KVM: MMU: simplify set_spte Xiao Guangrong
2013-01-23 10:06 ` [PATCH v2 05/12] KVM: MMU: introduce vcpu_adjust_access Xiao Guangrong
2013-01-24 10:36 ` Gleb Natapov
2013-01-24 11:33 ` Xiao Guangrong
2013-01-23 10:07 ` [PATCH v2 06/12] KVM: MMU: introduce a static table to map guest access to spte access Xiao Guangrong
2013-01-25 0:15 ` Marcelo Tosatti
2013-01-25 2:46 ` Xiao Guangrong
2013-01-29 0:07 ` Marcelo Tosatti
2013-01-29 1:07 ` Marcelo Tosatti
2013-01-29 13:16 ` Gleb Natapov
2013-01-30 3:53 ` Xiao Guangrong
2013-01-23 10:07 ` [PATCH v2 07/12] KVM: MMU: remove pt_access in mmu_set_spte Xiao Guangrong
2013-01-23 10:08 ` [PATCH v2 08/12] KVM: MMU: cleanup __direct_map Xiao Guangrong
2013-01-23 10:09 ` [PATCH v2 09/12] KVM: MMU: introduce mmu_spte_establish Xiao Guangrong
2013-01-23 10:09 ` [PATCH v2 10/12] KVM: MMU: unify the code of walking pte list Xiao Guangrong
2013-01-27 13:28 ` Gleb Natapov
2013-01-29 3:01 ` Xiao Guangrong
2013-01-23 10:10 ` [PATCH v2 11/12] KVM: MMU: fix spte assertion Xiao Guangrong
2013-01-23 10:10 ` [PATCH v2 12/12] KVM: MMU: fast drop all spte on the pte_list Xiao Guangrong
2013-01-27 12:06 ` [PATCH v2 01/12] KVM: MMU: lazily drop large spte Gleb Natapov
2013-01-29 2:57 ` Xiao Guangrong
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