Messages in this thread | | | Date | Fri, 07 Mar 2014 13:01:22 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [qemu64,+smep,+smap] WARNING: CPU: 1 PID: 0 at arch/x86/kernel/cpu/amd.c:220 init_amd() |
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On 03/07/2014 11:10 AM, Dave Jones wrote: > On Fri, Mar 07, 2014 at 10:56:11AM -0800, H. Peter Anvin wrote: > > On 03/06/2014 09:50 PM, Fengguang Wu wrote: > > >> > > >> Unfortunately these things are hard to fix in Qemu. > > > > > > OK. As an alternative, is it possible to pass one of the below CPUID flags in > > > the Qemu command line, so as to quiet the warning? > > > > > > > I don't see the AMD SMP CPUID flag in there. > > > > Boris, could you help? The problem is that "qemu -cpu > > qemu64,+smep,+smap" identifies as an AMD CPU which triggers a > > warning/taint because the SMP flag isn't set. > > qemu64 triggers this ? That spew comes from amd_k7_smp_check() > which should only run on family 6, which was all 32bit. >
[ 0.152749] smpboot: CPU0: AMD QEMU Virtual CPU version 1.6.0 (fam: 06, model: 02, stepping: 03)
Seems they are using a really odd CPUID combination, then.
-hpa
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