shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-04 18:19:28 +09:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
[ Upstream commit 95953034fb ]

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: 0dd2d7494c ("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>
This commit is contained in:
Reinette Chatre
2017-10-20 02:16:57 -07:00
committed by Greg Kroah-Hartman
parent dd89f47e21
commit 24567dc3cc
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/kernel/cpu/intel_rdt.c
View File

@@ -267,6 +267,7 @@ static void rdt_get_cdp_l3_config(int type)
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;
/*