From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: peter.maydell@linaro.org, ehabkost@redhat.com,
Marcel Apfelbaum <marcel.a@redhat.com>,
qemu-devel@nongnu.org, jan.kiszka@siemens.com, agraf@suse.de,
lcapitulino@redhat.com, aliguori@amazon.com, afaerber@suse.de
Subject: Re: [Qemu-devel] [PATCH for-1.7 v2 0/8] fix address space size issue
Date: Thu, 07 Nov 2013 16:07:34 +0100 [thread overview]
Message-ID: <527BACB6.2090305@redhat.com> (raw)
In-Reply-To: <20131107150501.GA3976@redhat.com>
Il 07/11/2013 16:05, Michael S. Tsirkin ha scritto:
>> > So, ack for patch 5-7-8, which should also be enough to fix the problem
>> > that Luiz reported.
> Not at all. As long as exec.c ignores high bits, any access
> there will end up in the wrong region.
... unless it happens to be the correct region because the whole
2^64-bit range is covered by a single region. This is what happens for
IOMMUs.
Paolo
> We might not get a crash but we'll get guest memory corruption.
next prev parent reply other threads:[~2013-11-07 15:09 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-07 10:41 [Qemu-devel] [PATCH for-1.7 v2 0/8] fix address space size issue Marcel Apfelbaum
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 1/8] exec: declare TARGET_PHYS_ADDR_SPACE_MAX to limit memory regions rendered by exec Marcel Apfelbaum
2013-11-07 10:49 ` Peter Maydell
2013-11-07 11:32 ` Marcel Apfelbaum
2013-11-07 12:04 ` Michael S. Tsirkin
2013-11-07 13:49 ` Paolo Bonzini
2013-11-07 15:40 ` Michael S. Tsirkin
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 2/8] hw/alpha: limit iommu-typhoon memory size Marcel Apfelbaum
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 3/8] hw/ppc: limit iommu-spapr " Marcel Apfelbaum
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 4/8] exec: don't ignore high address bits on lookup Marcel Apfelbaum
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 5/8] pci: fix address space size for bridge Marcel Apfelbaum
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 6/8] exec: don't ignore high address bits on set Marcel Apfelbaum
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 7/8] pc: s/INT64_MAX/UINT64_MAX/ Marcel Apfelbaum
2013-11-19 11:44 ` Paolo Bonzini
2013-11-19 12:04 ` Michael S. Tsirkin
2013-11-07 10:41 ` [Qemu-devel] [PATCH for-1.7 v2 8/8] spapr_pci: s/INT64_MAX/UINT64_MAX/ Marcel Apfelbaum
2013-11-07 11:07 ` [Qemu-devel] [PATCH for-1.7 v2 0/8] fix address space size issue Alexander Graf
2013-11-07 14:08 ` Paolo Bonzini
2013-11-07 15:05 ` Michael S. Tsirkin
2013-11-07 15:07 ` Paolo Bonzini [this message]
2013-11-07 15:20 ` Michael S. Tsirkin
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