diff options
| author | Luck, Tony <tony.luck@intel.com> | 2021-06-15 20:44:19 +0300 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2021-06-18 04:23:14 +0300 |
| commit | f0a029fff4a50eb01648810a77ba1873e829fdd4 (patch) | |
| tree | 4dcfcf68d9881200894ea621a81b611c9e7e354e /drivers | |
| parent | ad774bd5a8c23a319773ac3668382f24d62a39a8 (diff) | |
| download | linux-f0a029fff4a50eb01648810a77ba1873e829fdd4.tar.xz | |
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 <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20210615174419.GA1087688@agluck-desk2.amr.corp.intel.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/edac/i10nm_base.c | 3 | ||||
| -rw-r--r-- | drivers/edac/pnd2_edac.c | 3 | ||||
| -rw-r--r-- | drivers/edac/sb_edac.c | 3 | ||||
| -rw-r--r-- | drivers/edac/skx_base.c | 3 |
4 files changed, 12 insertions, 0 deletions
diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c index fb7e72d3fd2c..6ce0ed2ffaaf 100644 --- a/drivers/edac/i10nm_base.c +++ b/drivers/edac/i10nm_base.c @@ -414,6 +414,9 @@ static int __init i10nm_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(i10nm_cpuids); if (!id) return -ENODEV; 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; diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c index 93daa4297f2e..4c626fcd4dcb 100644 --- a/drivers/edac/sb_edac.c +++ b/drivers/edac/sb_edac.c @@ -3510,6 +3510,9 @@ static int __init sbridge_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(sbridge_cpuids); if (!id) return -ENODEV; diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c index 6a4f0b27c654..4dbd46575bfb 100644 --- a/drivers/edac/skx_base.c +++ b/drivers/edac/skx_base.c @@ -656,6 +656,9 @@ static int __init skx_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(skx_cpuids); if (!id) return -ENODEV; |