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Re: [PATCH 2/6] x86/mm: p2m_add_foreign() is HVM-only

On 12.01.21 13:58, Jan Beulich wrote:

Hi Jan.

On 11.01.2021 09:23, Oleksandr wrote:
On 11.01.21 09:41, Jan Beulich wrote:
If you could also provide your exact .config, I could see whether I
can repro here with some of the gcc5 versions I have laying around.
Please see attached
Builds perfectly fine with 5.4.0 here.

Thank you for testing.

I wonder whether I indeed missed something. I have switched to 5.4.0 again (from 9.3.0) and rechecked, a build issue was still present. I even downloaded 5.4.0 sources and built them to try to build Xen, and got the same effect.  What I noticed is that for non-debug builds the build issue wasn't present. Then I decided to build today's staging (414be7b66349e7dca42bc1fd47c2b2f5b2d27432 xen/memory: Fix compat XENMEM_acquire_resource for size requests) instead of 9-day's old one when I had initially reported about that build issue (7ba2ab495be54f608cb47440e1497b2795bd301a x86/p2m: Fix paging_gva_to_gfn() for nested virt). Today's staging builds perfectly fine with 5.4.0. It seems that commit in the middle (994f6478a48a60e3b407c7defc2d36a80f880b04 xsm/dummy: harden against speculative abuse) indirectly fixes that weird build issue with 5.4.0...


Oleksandr Tyshchenko



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