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Re: [Xen-devel] Problem with Xen 4.5 failing XTF tests on old AMD cpus ?

On 21/09/16 19:06, Wei Liu wrote:
On Wed, Sep 21, 2016 at 02:00:50PM -0400, Boris Ostrovsky wrote:
On 09/21/2016 01:36 PM, Wei Liu wrote:
On Wed, Sep 21, 2016 at 12:42:51PM -0400, Boris Ostrovsky wrote:
On 09/21/2016 12:13 PM, Ian Jackson wrote:
Platform Team regression test user writes ("[xen-4.5-testing baseline-only test] 
67737: regressions - FAIL"):
test-xtf-amd64-amd64-1 19 xtf/test-hvm32-invlpg~shadow fail REGR. vs. 67706
test-xtf-amd64-amd64-1 26 xtf/test-hvm32pae-invlpg~shadow fail REGR. vs. 67706
Several of these, 32bit and 64bit HVM.  This is in the Citrix
Cambridge osstest instance.  The Xen Project colo instance is
unaffected (flight 101045 there passed with the same revisions of

This is with:

   xen e4ae4b03d35babc9624b7286f1ea4c6749bad84b
   xtf b5c5332de4268d33a6f8eadc1d17c7b9cf0e7dc3
   linux b65f2f457c49b2cfd7967c34b7a0b04c25587f13
   linux-firmware c530a75c1e6a472b0eb9558310b518f0dfcd8860
I can't get these commits neither for Xen nor for Linux. Are these from
Citrix trees?
No. They are all upstream commits.
Apparently xen commit *just* made it to the tree, after I checked it.
Yes, it passed in Mass COLO. We suspected it can be related to
generations of AMD cpus (hence the "old" in email title).

It will be because of Gen1 SVM which doesn't have NRIP support. This case requires emulation of the invlpg instruction, rather than just using the information provided by the intercept.


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