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SubjectRe: [PATCH v1 4/4] x86/msr: Do not allow writes to MSR_IA32_ENERGY_PERF_BIAS
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On 10/29/20 1:02 PM, Borislav Petkov wrote:
> 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);
>
>

Thanks. Looks good to me.

Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah

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