Messages in this thread Patch in this message | | | From | Smita Koralahalli <> | Subject | [PATCH] EDAC/mce_amd: Do not load edac_mce_amd module on guests | Date | Mon, 28 Jun 2021 12:27:40 -0500 |
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Hypervisors may not expose SMCA feature to the guest.
Check for X86_FEATURE_HYPERVISOR on entry in mce_amd_init() and return -ENODEV if set.
Suggested-by: Borislav Petkov <bp@suse.de> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com> --- drivers/edac/mce_amd.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c index 5dd905a3f30c..1a1629166aa3 100644 --- a/drivers/edac/mce_amd.c +++ b/drivers/edac/mce_amd.c @@ -1176,6 +1176,9 @@ static int __init mce_amd_init(void) c->x86_vendor != X86_VENDOR_HYGON) return -ENODEV; + if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) + return -ENODEV; + if (boot_cpu_has(X86_FEATURE_SMCA)) { xec_mask = 0x3f; goto out; -- 2.17.1
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