cpufreq/amd-pstate: Prevent the driver from loading on unsupported hardware

X86_FEATURE_HW_PSTATE indicates if the processor supports frequency
scaling or not. Without it, the driver is unusable and thus will not
load. This check also prevents the driver from loading in guests and
thus not confuse users with misleading prints.

Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Acked-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Rong Zhang <i@rong.moe>
Link: https://lore.kernel.org/r/20260722-amd-pstate-vm-v4-1-d6607d9e9d9a@rong.moe
Signed-off-by: Mario Limonciello <superm1@kernel.org>

0 files changed, 0 insertions, 0 deletions