From f0a029fff4a50eb01648810a77ba1873e829fdd4 Mon Sep 17 00:00:00 2001 From: "Luck, Tony" Date: Tue, 15 Jun 2021 10:44:19 -0700 Subject: EDAC/Intel: Do not load EDAC driver when running as a guest There's little to no point in loading an EDAC driver running in a guest: 1) The CPU model reported by CPUID may not represent actual h/w 2) The hypervisor likely does not pass in access to memory controller devices 3) Hypervisors generally do not pass corrected error details to guests Add a check in each of the Intel EDAC drivers for X86_FEATURE_HYPERVISOR and simply return -ENODEV in the init routine. Acked-by: Borislav Petkov Signed-off-by: Tony Luck Link: https://lore.kernel.org/r/20210615174419.GA1087688@agluck-desk2.amr.corp.intel.com --- drivers/edac/pnd2_edac.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/edac/pnd2_edac.c') diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c index 928f63a374c7..c94ca1f790c4 100644 --- a/drivers/edac/pnd2_edac.c +++ b/drivers/edac/pnd2_edac.c @@ -1554,6 +1554,9 @@ static int __init pnd2_init(void) if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) return -EBUSY; + if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) + return -ENODEV; + id = x86_match_cpu(pnd2_cpuids); if (!id) return -ENODEV; -- cgit v1.2.3