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[Xen-devel] Re: [PATCH] hvm: Fix APIC-ID cpuid intercept
| To: | Andre Przywara <andre.przywara@xxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: [PATCH] hvm: Fix APIC-ID cpuid intercept |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Thu, 07 Feb 2008 08:19:48 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 07 Feb 2008 00:19:31 -0800 |
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| Thread-index: | AchpYjP9coPYqtVVEdymTgAWy6hiGQ== |
| Thread-topic: | [PATCH] hvm: Fix APIC-ID cpuid intercept |
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On 6/2/08 22:44, "Andre Przywara" <andre.przywara@xxxxxxx> wrote: > the HVM CPUID intercept does not mask out the local APIC ID bits in > CPUID Fn0000_0001, bits 24-31 in EBX. This results in inconsistent > values of subsequent calls to cpuid on the same VCPU (delivering the > value of the physical CPU), depending on the current scheduling. This > for instance confuses Linux' NUMA code. > The attached patch fixes this by replacing the physical APIC ID with the > VCPU number, both in the VMX and SVM branches. > > Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> > > I hope this does not trigger any side effects... I'm sure it can't do worse than the current broken behaviour! Thanks, Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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