Messages in this thread | | | Date | Thu, 11 Mar 2021 12:48:14 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH V2 2/25] x86/cpu: Add helper functions to get parameters of hybrid CPUs |
| |
On Wed, Mar 10, 2021 at 08:37:38AM -0800, kan.liang@linux.intel.com wrote: > From: Ricardo Neri <ricardo.neri-calderon@linux.intel.com> > > On processors with Intel Hybrid Technology (i.e., one having more than one > type of CPU in the same package), all CPUs support the same instruction > set and enumerate the same features on CPUID. Thus, all software can run > on any CPU without restrictions. However, there may be model-specific > differences among types of CPUs. For instance, each type of CPU may support > a different number of performance counters. Also, machine check error banks > may be wired differently. Even though most software will not care about > these differences, kernel subsystems dealing with these differences must > know. Add a new member to cpuinfo_x86 that subsystems can query to know ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
That is not the case anymore.
And it looks like the IPIing is going away too, which is good.
Thx.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
| |