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From: Jack Wang <jinpu.wang@ionos.com>
To: linux-edac@vger.kernel.org
Cc: yazen.ghannam@amd.com, bp@alien8.de, tony.luck@intel.com,
	mchehab@kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] EDAC/amd64: Do not load EDAC driver when running as a guest
Date: Tue,  6 Jul 2021 07:08:33 +0200	[thread overview]
Message-ID: <20210706050833.9852-1-jinpu.wang@ionos.com> (raw)

Similar to commit f0a029fff4a5 ("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.

Add a check in each of the Intel EDAC drivers for X86_FEATURE_HYPERVISOR
and simply return -ENODEV in the init routine.

Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
---
 drivers/edac/amd64_edac.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index f0d8f60acee1..cdb14575ef31 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -3942,6 +3942,9 @@ static int __init amd64_edac_init(void)
 	if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
 		return -EBUSY;
 
+	if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
+		return -ENODEV;
+
 	if (!x86_match_cpu(amd64_cpuids))
 		return -ENODEV;
 
-- 
2.25.1


             reply	other threads:[~2021-07-06  5:08 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-06  5:08 Jack Wang [this message]
2021-07-06  5:33 ` Borislav Petkov
2021-07-06  5:38   ` Jinpu Wang

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