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platform/x86: intel-uncore-freq: Prevent driver loading in guests

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Loading this driver in guests results in unchecked MSR access error for
MSR 0x620.

There is no use of reading and modifying package/die scope uncore MSRs
in guests. So check for CPU feature X86_FEATURE_HYPERVISOR to prevent
loading of this driver in guests.

Fixes: dbce412a77 ("platform/x86/intel-uncore-freq: Split common and enumeration part")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215870
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20220427100304.2562990-1-srinivas.pandruvada@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Srinivas Pandruvada 2022-04-27 03:03:04 -07:00 committed by Hans de Goede
parent 258af41d15
commit e769cb20c5
1 changed files with 3 additions and 0 deletions
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3
drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c
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@ -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;