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

[Tony Luck]

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

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

Cc: sta...@vger.kernel.org # v4.14
Signed-off-by: Tony Luck 
---
 arch/x86/kernel/cpu/intel_rdt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
index 24bfa63e86cf..ec4754f81cbd 100644
--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -845,6 +845,8 @@ 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");
}
 }
 
-- 
2.17.0

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

[Tony Luck]

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

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

Cc: sta...@vger.kernel.org # v4.14
Signed-off-by: Tony Luck 
---
 arch/x86/kernel/cpu/intel_rdt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
index 24bfa63e86cf..ec4754f81cbd 100644
--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -845,6 +845,8 @@ 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");
}
 }
 
-- 
2.17.0