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[Xen-devel] Re: [PATCH]: blacklist new AMD CPUID bits for PV domains

To: Andre Przywara <andre.przywara@xxxxxxx>

From: Keir Fraser <keir@xxxxxxx>

Date: Tue, 25 Jan 2011 14:56:28 +0000

Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>

Delivery-date: Tue, 25 Jan 2011 06:57:47 -0800

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Thread-topic: [PATCH]: blacklist new AMD CPUID bits for PV domains

On 25/01/2011 14:14, "Andre Przywara" <andre.przywara@xxxxxxx> 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@xxxxxxx> Andre, You also need to mask these in tools/libxc/xc_cpuid_x86.c, right? The hypervisor code you modify affects only dom0. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel

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