On Mon 03 Nov 2025 01:03:19 PM , Borislav Petkov wrote:
On Mon, Nov 03, 2025 at 02:22:44AM -0800, Christopher Snowhill wrote:
Although apparently, the patch does break userspace for any distribution building packages with -march=znver4
Care to elaborate?
Sorry for the HTML before, apparently I'm not supposed to try writing replies from my tablet, because it will interpret the quote indenting as formatting and forcibly send HTML mail.
Anyway. A bug report was sent here:
https://lore.kernel.org/lkml/9a27f2e6-4f62-45a6-a527-c09983b8dce4@cachyos.or...
Qt is built with -march=znver4, which automatically enables -mrdseed. This is building rdseed 64 bit, but then the software is also performing kernel feature checks on startup. There is no separate feature flag for 16/32/64 variants.
-- Regards/Gruss, Boris.