Re: [Xen-devel] [PATCH] x86/EPT: fix super page splitting when resolving EPT_MISCONFIG VM exits

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 23.04.14 at 10:51, <wei.liu2@xxxxxxxxxx> wrote:
> On Wed, Apr 23, 2014 at 07:47:30AM +0100, Jan Beulich wrote:
>> Reported-by: Wei Liu <wei.liu2@xxxxxxxxxx>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> 
>> --- a/xen/arch/x86/mm/p2m-ept.c
>> +++ b/xen/arch/x86/mm/p2m-ept.c
>> @@ -352,6 +352,7 @@ bool_t ept_handle_misconfig(uint64_t gpa
>>                  {
>>                      if ( ept_split_super_page(p2m, &e, level, level - 1) )
>>                      {
>> +                        atomic_write_ept_entry(&epte[i], e);
>>                          unmap_domain_page(epte);
>>                          mfn = e.mfn;
>>                          continue;
>> 
> 
> This patch doesn't apply to Xen master branch...

Right - I could have mentioned that this requires 75e253bb
("x86/EPT: correct double unmap_domain_page() on error path")
as a prereq, but I'm generally assuming that patches are against
the staging tree...

Jan


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