From: Borislav Petkov Date: Thu, 15 Oct 2020 13:00:31 +0000 (+0200) Subject: x86/msr: Do not allow writes to MSR_IA32_ENERGY_PERF_BIAS X-Git-Tag: v5.11-rc1~192^2~5 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=18741a5251d018094536a2dffe284d269ebb07fe;p=thirdparty%2Flinux.git 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 Reviewed-by: Shuah Khan Link: https://lkml.kernel.org/r/20201029190259.3476-5-bp@alien8.de --- diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c index c0d4098106589..b1147862730cc 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);