Re: [Xen-devel] [PATCH v2 04/12] x86/altp2m: basic data structures and support routines.

[Ed White <edmund.h.white@xxxxxxxxx>]

On 06/24/2015 03:06 AM, Andrew Cooper wrote:
>> diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
>> index d0d3f1e..202aa42 100644
>> --- a/xen/arch/x86/mm/hap/hap.c
>> +++ b/xen/arch/x86/mm/hap/hap.c
>> @@ -459,7 +459,7 @@ void hap_domain_init(struct domain *d)
>>  int hap_enable(struct domain *d, u32 mode)
>>  {
>>      unsigned int old_pages;
>> -    uint8_t i;
>> +    uint16_t i;
>>      int rv = 0;
>>  
>>      domain_pause(d);
>> @@ -498,6 +498,24 @@ int hap_enable(struct domain *d, u32 mode)
>>             goto out;
>>      }
>>  
>> +    /* Init alternate p2m data */
>> +    if ( (d->arch.altp2m_eptp = alloc_xenheap_page()) == NULL )
> 
> Please use alloc_domheap_page() and map_domain_page_global() so the
> allocation is accounted against the domain.

You raised this back in January too, and I did try it. Unfortunately,
allocating that way caused repeated Xen panics, and when I reported that
to you and Tim on the list 2 or 3 months ago Tim said that he thought
the existing code was acceptable in this instance, since this is only 1
page per-domain.

Ed


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