Loading this driver in guests results in unchecked MSR access error for MSR 0x620. There is no use of reading and modifying package/die scoped uncore MSRs in guests. So check for CPU feature X86_FEATURE_HYPERVISOR to prevent loading of this driver in guests. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215870 Suggested-by: Borislav Petkov <bp@xxxxxxx> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx> --- drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c index c61f804dd44e..8f9c571d7257 100644 --- a/drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c +++ b/drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c @@ -212,6 +212,9 @@ static int __init intel_uncore_init(void) const struct x86_cpu_id *id; int ret; + if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) + return -ENODEV; + id = x86_match_cpu(intel_uncore_cpu_ids); if (!id) return -ENODEV; -- 2.31.1
