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 <b...@suse.de> AuthorDate: Thu, 15 Oct 2020 15:00:31 +02:00 Committer: Borislav Petkov <b...@suse.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 <b...@suse.de> Reviewed-by: Shuah Khan <sk...@linuxfoundation.org> Link: https://lkml.kernel.org/r/20201029190259.3476-5...@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 x...@kernel.org.\n", reg, current->comm, current->pid);
