[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/4] x86/EPT: consider page order when checking for APIC MFN
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx] > Sent: Wednesday, April 23, 2014 4:40 PM > > This was overlooked in 3d90d6e6 ("x86/EPT: split super pages upon > mismatching memory types"). > > Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx> > > --- a/xen/arch/x86/hvm/mtrr.c > +++ b/xen/arch/x86/hvm/mtrr.c > @@ -816,15 +816,18 @@ int epte_get_entry_emt(struct domain *d, > !has_arch_pdevs(d)) ) > { > ASSERT(!direct_mmio || > - mfn_x(mfn) == > d->arch.hvm_domain.vmx.apic_access_mfn); > + !((mfn_x(mfn) ^ > d->arch.hvm_domain.vmx.apic_access_mfn) >> > + order)); > *ipat = 1; > return MTRR_TYPE_WRBACK; > } > > if ( direct_mmio ) > { > - if ( mfn_x(mfn) != d->arch.hvm_domain.vmx.apic_access_mfn ) > + if ( (mfn_x(mfn) ^ d->arch.hvm_domain.vmx.apic_access_mfn) >> > order ) > return MTRR_TYPE_UNCACHABLE; > + if ( order ) > + return -1; > *ipat = 1; > return MTRR_TYPE_WRBACK; > } > > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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