On 2026-10-08 19:00, Sohil Mehta wrote:
> 
> Note, the CPUID bit does not reflect whether the kernel enabled LASS;
> only the cpuinfo flag does. But parsing cpuinfo is cumbersome, and the
> kernel enables LASS whenever the CPU supports it unless the command line
> opts out (vsyscall=emulate or clearcpuid=lass). To keep it simple, rely
> on the CPUID bit and accept a failure in these unusual cases.
> 
Cumbersome, really?

Here is a set of parsing functions -- tested, even! -- that you can make
available as library routines. Integrating them into the selftests build
framework has been left as an exercise for the reader ;-)

Signed-off-by: H. Peter Anvin (Rosaic) <hpa@zytor.com>

	-hpa