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x86/msr: Do not allow writes to MSR_IA32_ENERGY_PERF_BIAS

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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>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lkml.kernel.org/r/20201029190259.3476-5-bp@alien8.de
This commit is contained in:
Borislav Petkov 2020-10-15 15:00:31 +02:00
parent fe0a578862
commit 18741a5251
1 changed files with 0 additions and 3 deletions
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3
arch/x86/kernel/msr.c
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@ -99,9 +99,6 @@ static int filter_write(u32 reg)
if (!__ratelimit(&fw_rs)) if (!__ratelimit(&fw_rs))
return 0; 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", pr_err("Write to unrecognized MSR 0x%x by %s (pid: %d). Please report to x86@kernel.org.\n",
reg, current->comm, current->pid); reg, current->comm, current->pid);