On 23/09/2015 13:07, Borislav Petkov wrote:
>> > + static bool first;
>> >
>> > best = kvm_find_cpuid_entry(vcpu, 0, 0);
>> > + if (first && best) {
>> > + printk("cpuid(0).ebx = %x\n", best->ebx);
>> > + first = false;
>> > + } else if (first)
>> > + printk_ratelimited("cpuid(0) not initialized yet\n");
>> > +
>> > return best && best->ebx == X86EMUL_CPUID_VENDOR_AuthenticAMD_ebx;
> Do I see it correctly that that "first" thing is never true?
>
> In any case, I changed it to initialize to true but still no output from
> that function.
>
> [ 102.448438] walk_shadow_page_get_mmio_spte: detect reserved bits on spte,
> addr 0xb8000 (level 4, 0xf0000000000f8)
> [ 102.458706] walk_shadow_page_get_mmio_spte: detect reserved bits on spte,
> addr 0xb8000 (level 3, 0xf000000000078)
> [ 102.468955] walk_shadow_page_get_mmio_spte: detect reserved bits on spte,
> addr 0xb8000 (level 2, 0xf000000000078)
Yeah, but I didn't totally need the output so I didn't bother answering
with yet another v2. I'm a bit stymied and will try to find an AMD
machine inside RH (it's always a pain to install latest-and-greatest
kernel on unknown machines). It's probably also time to buy one too...
Paolo
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