From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753014AbdKVW1S (ORCPT ); Wed, 22 Nov 2017 17:27:18 -0500 Received: from omzsmtpe03.verizonbusiness.com ([199.249.25.208]:20124 "EHLO omzsmtpe03.verizonbusiness.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752259AbdKVW06 (ORCPT ); Wed, 22 Nov 2017 17:26:58 -0500 From: alexander.levin@verizon.com Cc: Reinette Chatre , Thomas Gleixner , alexander.levin@verizon.com X-Host: mariner.tdc.vzwcorp.com To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: [PATCH AUTOSEL for 4.14 23/51] x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled Thread-Topic: [PATCH AUTOSEL for 4.14 23/51] x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled Thread-Index: AQHTY+DUMmYzBUN75020NWeEORXL4Q== Date: Wed, 22 Nov 2017 22:25:41 +0000 Message-ID: <20171122222526.20021-23-alexander.levin@verizon.com> References: <20171122222526.20021-1-alexander.levin@verizon.com> In-Reply-To: <20171122222526.20021-1-alexander.levin@verizon.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.144.60.250] Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id vAMMRUaf023656 From: Reinette Chatre [ 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 Signed-off-by: Thomas Gleixner Acked-by: Fenghua Yu Acked-by: Vikas Shivappa Acked-by: Tony Luck Link: https://lkml.kernel.org/r/815747bddc820ca221a8924edaf4d1a7324547e4.1508490116.git.reinette.chatre@intel.com Signed-off-by: Sasha Levin --- arch/x86/kernel/cpu/intel_rdt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c index cd5fc61ba450..88dcf8479013 100644 --- 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 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; /* -- 2.11.0