Patch "x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled" has been added to the 4.14-stable tree

Patch "x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     x86-intel_rdt-initialize-bitmask-of-shareable-resource-if-cdp-enabled.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Dec  6 18:04:41 CET 2017
From: Reinette Chatre <reinette.chatre@intel.com>
Date: Fri, 20 Oct 2017 02:16:57 -0700
Subject: x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled

From: Reinette Chatre <reinette.chatre@intel.com>


[ Upstream commit 95953034fb24c16ad0047a98b16427e5935830c4 ]

The platform informs via CPUID.(EAX=0x10, ECX=res#):EBX[31:0] (valid res#
are only 1 for L3 and 2 for L2) which unit of the allocation may be used by
other entities in the platform. This information is valid whether CDP (Code
and Data Prioritization) is enabled or not.

Ensure that the bitmask of shareable resource is initialized when CDP is
enabled.

Fixes: 0dd2d7494cd8 ("x86/intel_rdt: Show bitmask of shareable resource with other executing units"
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/815747bddc820ca221a8924edaf4d1a7324547e4.1508490116.git.reinette.chatre@intel.com
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/kernel/cpu/intel_rdt.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kernel/cpu/intel_rdt.c
+++ b/arch/x86/kernel/cpu/intel_rdt.c
@@ -267,6 +267,7 @@ static void rdt_get_cdp_l3_config(int ty
 	r->num_closid = r_l3->num_closid / 2;
 	r->cache.cbm_len = r_l3->cache.cbm_len;
 	r->default_ctrl = r_l3->default_ctrl;
+	r->cache.shareable_bits = r_l3->cache.shareable_bits;
 	r->data_width = (r->cache.cbm_len + 3) / 4;
 	r->alloc_capable = true;
 	/*


Patches currently in stable-queue which might be from reinette.chatre@intel.com are

queue-4.14/x86-intel_rdt-fix-potential-deadlock-during-resctrl-mount.patch
queue-4.14/x86-intel_rdt-initialize-bitmask-of-shareable-resource-if-cdp-enabled.patch