20 May
2022
20 May
'22
2:21 a.m.
On 5/19/22 10:15 PM, Chuck Zmudzinski wrote:
On 5/3/22 9:22 AM, Juergen Gross wrote:
Some drivers are using pat_enabled() in order to test availability of special caching modes (WC and UC-). This will lead to false negatives in case the system was booted e.g. with the "nopat" variant and the BIOS did setup the PAT MSR supporting the queried mode, or if the system is running as a Xen PV guest.
Hello,
I am also getting a false positive
Sorry, I meant false negative here, not false positive.
Chuck
in a Xen Dom0 from pat_enabled() where bdd8b6c98239 patched the file
drivers/gpu/drm/i915/gem/i915_gem_pages.c
I think this patch also needs to touch that file to fix the issue I am seeing.
...