From: Keir Fraser <keir@xen.org>
To: Andre Przywara <andre.przywara@amd.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Subject: Re: [PATCH]: blacklist new AMD CPUID bits for PV domains
Date: Tue, 25 Jan 2011 14:56:28 +0000 [thread overview]
Message-ID: <C964951C.12672%keir@xen.org> (raw)
In-Reply-To: <4D3EDABD.50202@amd.com>
On 25/01/2011 14:14, "Andre Przywara" <andre.przywara@amd.com> wrote:
> Hi,
>
> there are some new CPUID bits (and leaves) which Dom0 and PV domains
> should not see to avoid trouble, since we don't emulate the features.
> The most prominent one is a topology leaf, which contains information
> specific to the physical CPU, not the virtual one. To avoid confusion
> (and possibly crashes) due to a confused Dom0 scheduler simply disable
> these bits.
>
> Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Andre,
You also need to mask these in tools/libxc/xc_cpuid_x86.c, right? The
hypervisor code you modify affects only dom0.
-- Keir
prev parent reply other threads:[~2011-01-25 14:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-25 14:14 [PATCH]: blacklist new AMD CPUID bits for PV domains Andre Przywara
2011-01-25 14:56 ` Keir Fraser [this message]
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