From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3xvwY03tYLzDrnj for ; Sun, 17 Sep 2017 14:05:56 +1000 (AEST) Received: from ozlabs.org (bilbo.ozlabs.org [103.22.144.67]) by bilbo.ozlabs.org (Postfix) with ESMTP id 3xvwY01vHHz8vmk for ; Sun, 17 Sep 2017 14:05:56 +1000 (AEST) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3xvwXy4Ldrz9t2f for ; Sun, 17 Sep 2017 14:05:53 +1000 (AEST) Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v8H44OIt094574 for ; Sun, 17 Sep 2017 00:05:51 -0400 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0b-001b2d01.pphosted.com with ESMTP id 2d103t6cft-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Sun, 17 Sep 2017 00:05:50 -0400 Received: from localhost by e35.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sat, 16 Sep 2017 22:05:50 -0600 From: Sukadev Bhattiprolu To: Michael Ellerman Cc: Benjamin Herrenschmidt , mikey@neuling.org, hbabu@us.ibm.com, linuxppc-dev@ozlabs.org, Subject: [PATCH 09/10] powerpc/vas: Create cpu to vas id mapping Date: Sat, 16 Sep 2017 21:05:27 -0700 In-Reply-To: <1505621128-23877-1-git-send-email-sukadev@linux.vnet.ibm.com> References: <1505621128-23877-1-git-send-email-sukadev@linux.vnet.ibm.com> Message-Id: <1505621128-23877-10-git-send-email-sukadev@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Create a cpu to vasid mapping so callers can specify -1 instead of trying to find a VAS id. Changelog[v2] [Michael Ellerman] Use per-cpu variables to simplify code. Signed-off-by: Sukadev Bhattiprolu --- arch/powerpc/platforms/powernv/vas.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/powernv/vas.c b/arch/powerpc/platforms/powernv/vas.c index 565a487..abb7090 100644 --- a/arch/powerpc/platforms/powernv/vas.c +++ b/arch/powerpc/platforms/powernv/vas.c @@ -18,15 +18,18 @@ #include #include #include +#include #include "vas.h" static DEFINE_MUTEX(vas_mutex); static LIST_HEAD(vas_instances); +static DEFINE_PER_CPU(int, cpu_vas_id); + static int init_vas_instance(struct platform_device *pdev) { - int rc, vasid; + int rc, cpu, vasid; struct resource *res; struct vas_instance *vinst; struct device_node *dn = pdev->dev.of_node; @@ -74,6 +77,11 @@ static int init_vas_instance(struct platform_device *pdev) "paste_win_id_shift 0x%llx\n", pdev->name, vasid, vinst->paste_base_addr, vinst->paste_win_id_shift); + for_each_possible_cpu(cpu) { + if (cpu_to_chip_id(cpu) == of_get_ibm_chip_id(dn)) + per_cpu(cpu_vas_id, cpu) = vasid; + } + mutex_lock(&vas_mutex); list_add(&vinst->node, &vas_instances); mutex_unlock(&vas_mutex); @@ -98,6 +106,10 @@ struct vas_instance *find_vas_instance(int vasid) struct vas_instance *vinst; mutex_lock(&vas_mutex); + + if (vasid == -1) + vasid = per_cpu(cpu_vas_id, smp_processor_id()); + list_for_each(ent, &vas_instances) { vinst = list_entry(ent, struct vas_instance, node); if (vinst->vas_id == vasid) { -- 2.7.4