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Re: [Xen-devel] Re: [PATCH] libxc: remove CPUID core information manglin
| To: | "Huang2, Wei" <Wei.Huang2@xxxxxxx>, "Przywara, Andre" <Andre.Przywara@xxxxxxx>, Nitin Kamble <nitin.a.kamble@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Re: [PATCH] libxc: remove CPUID core information mangling |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Wed, 25 Aug 2010 16:39:04 +0100 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Wed, 25 Aug 2010 08:40:03 -0700 |
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| Thread-topic: | [Xen-devel] Re: [PATCH] libxc: remove CPUID core information mangling |
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I meant it should remain the old way, since HVM virtual APIC IDs are vcpu_id*2. -- Keir On 25/08/2010 16:28, "Huang2, Wei" <Wei.Huang2@xxxxxxx> wrote: > Hi Keir, > > Do you mean that we should leave 80000008:ECX[15:12] as zero or in old way > (i.e. (regs[2] & 0xf000u) + 1))? These bits can't be zero, unless we want to > use legacy method in multi-core calculation. > > -Wei > > ======== > I think you shouldn't change handling of 80000008:ECX[15:12] since that does > explicitly refer to APIC ID arrangement. The rest of your changes could be > correct as far as I can tell from the reference manuals. > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel > > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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