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Subject[PATCH v1 4/4] x86/msr: Do not allow writes to MSR_IA32_ENERGY_PERF_BIAS
Date
From: Borislav Petkov <bp@suse.de>

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@suse.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 c0d409810658..b1147862730c 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@kernel.org.\n",
reg, current->comm, current->pid);

--
2.21.0
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