4.17-stable review patch. If anyone has any objections, please let me know.
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From: Tony Luck tony.luck@intel.com
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: Tony Luck tony.luck@intel.com Signed-off-by: Thomas 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: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/kernel/cpu/intel_rdt.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -821,6 +821,8 @@ 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"); } }