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Commit 2d58a9ac authored by Tony Luck's avatar Tony Luck Committed by Greg Kroah-Hartman
Browse files

x86/intel_rdt: Enable CMT and MBM on new Skylake stepping 



commit 1d9f3e20a56d33e55748552aeec597f58542f92d upstream.

New stepping of Skylake has fixes for cache occupancy and memory
bandwidth monitoring.

Update the code to enable these by default on newer steppings.

Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: stable@vger.kernel.org # v4.14
Cc: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Link: https://lkml.kernel.org/r/20180608160732.9842-1-tony.luck@intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e6ef46cb

arch/x86/kernel/cpu/intel_rdt.c

+2 −0
Original line number Diff line number Diff line
@@ -773,6 +773,8 @@ static __init void rdt_quirks(void) 
	case INTEL_FAM6_SKYLAKE_X:

		if (boot_cpu_data.x86_stepping <= 4)

			set_rdt_options("!cmt,!mbmtotal,!mbmlocal,!l3cat");

		else

			set_rdt_options("!l3cat");

	}

}