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Message-ID: <160555730711.11244.5287578166367187235.tip-bot2@tip-bot2>
Date: Mon, 16 Nov 2020 20:08:27 -0000
From: "tip-bot2 for Borislav Petkov" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Borislav Petkov <bp@...e.de>,
Shuah Khan <skhan@...uxfoundation.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: x86/misc] x86/msr: Do not allow writes to MSR_IA32_ENERGY_PERF_BIAS
The following commit has been merged into the x86/misc branch of tip:
Commit-ID: 18741a5251d018094536a2dffe284d269ebb07fe
Gitweb: https://git.kernel.org/tip/18741a5251d018094536a2dffe284d269ebb07fe
Author: Borislav Petkov <bp@...e.de>
AuthorDate: Thu, 15 Oct 2020 15:00:31 +02:00
Committer: Borislav Petkov <bp@...e.de>
CommitterDate: Mon, 16 Nov 2020 17:44:04 +01:00
x86/msr: Do not allow writes to MSR_IA32_ENERGY_PERF_BIAS
Now that all in-kernel-tree users are converted to using the sysfs file,
remove the MSR from the "allowlist".
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>
Link: https://lkml.kernel.org/r/20201029190259.3476-5-bp@alien8.de
---
arch/x86/kernel/msr.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index c0d4098..b114786 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -99,9 +99,6 @@ static int filter_write(u32 reg)
if (!__ratelimit(&fw_rs))
return 0;
- if (reg == MSR_IA32_ENERGY_PERF_BIAS)
- return 0;
-
pr_err("Write to unrecognized MSR 0x%x by %s (pid: %d). Please report to x86@...nel.org.\n",
reg, current->comm, current->pid);
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