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Re: [Xen-devel] [PATCH v6 1/4] arm: introduce psci_smp_ops
- To: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>
- From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
- Date: Fri, 19 Apr 2013 17:16:06 +0100
- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>, "arnd@xxxxxxxx" <arnd@xxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>, "marc.zyngier@xxxxxxx" <marc.zyngier@xxxxxxx>, "will.deacon@xxxxxxx" <will.deacon@xxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "rob.herring@xxxxxxxxxxx" <rob.herring@xxxxxxxxxxx>, "linux-arm-kernel@xxxxxxxxxxxxxxxxxxx" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 19 Apr 2013 16:16:46 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Fri, 2013-04-19 at 16:47 +0100, Nicolas Pitre wrote:
> No one should be probing registers without making sure it is safe to do
> so. Even on non virtualized hardware this can be a dangerous thing to
> do.
Won't people writing per machine code consider, not unreasonably, that
having been called through a mdesc machine specific hook constitutes
enough "making sure" that they think it is safe to touch registers which
are specific to that machine?
Ian.
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