>>> On 20.01.17 at 20:41, <andrew.coop...@citrix.com> wrote:
> On 19/01/17 17:29, Roger Pau Monne wrote:
>> + tss = map_domain_gfn(p2m_get_hostp2m(d), _gfn(PFN_DOWN(gaddr)),
>> + &mfn, &p2mt, 0, &rc);
>> + if ( tss == NULL )
>> + {
>> + printk("Unable to map VM86 TSS area\n");
>> + return 0;
>> + }
>> +
>> + memset(tss, 0, HVM_VM86_TSS_SIZE);
>
> Do we actually need to 0 this? Don't we guarantee to hand out zero'd
> pages during construction? (I can't actually recall. Perhaps it is
> better to explicitly clear it.)
No, we don't zero before handing out, we zero after a reclaiming
memory from a dying guest or from the hypervisor.
Jan
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