[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] pv/pvh: disable MTRR feature on cpuid for Dom0
On 13/12/13 12:28, Jan Beulich wrote: >>>> On 12.12.13 at 17:52, Roger Pau Monne <roger.pau@xxxxxxxxxx> wrote: >> MTRR is not available for PV/PVH Dom0, so prevent cpuid from >> reporting it as an available feature. > > Some misunderstanding perhaps? PV certainly has MTRR support for > Dom0 - see XENPF_*_memtype. OK, my bad, I was looking for a PV implementation of struct mtrr_ops in the pvops kernel, but Linux pvops doesn't use MTRR at all, also none of the XENPF_*_memtype ops seem to be used. > >> --- a/xen/arch/x86/traps.c >> +++ b/xen/arch/x86/traps.c >> @@ -796,6 +796,7 @@ void pv_cpuid(struct cpu_user_regs *regs) >> __clear_bit(X86_FEATURE_DS, &d); >> __clear_bit(X86_FEATURE_ACC, &d); >> __clear_bit(X86_FEATURE_PBE, &d); >> + __clear_bit(X86_FEATURE_MTRR, &d); > > Thus clearing this flag should be limited to PVH. Will resend now with this fixed, thanks. Roger. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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