From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752477AbdJFQzQ (ORCPT ); Fri, 6 Oct 2017 12:55:16 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:42229 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751875AbdJFQzL (ORCPT ); Fri, 6 Oct 2017 12:55:11 -0400 From: Vijay Kumar To: davem@davemloft.net Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com, rob.gardner@oracle.com, sam@ravnborg.org Subject: [PATCH v3 5/5] sparc64: Use sparc optimised fls and __fls for T4 and above Date: Fri, 6 Oct 2017 10:54:53 -0600 Message-Id: <1507308893-9218-6-git-send-email-vijay.ac.kumar@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> References: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com> X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For T4 and above, patch fls and __fls functions at the boot time to use lzcnt instruction. Signed-off-by: Vijay Kumar --- arch/sparc/kernel/head_64.S | 2 ++ arch/sparc/lib/NG4patch.S | 9 +++++++++ 2 files changed, 11 insertions(+), 0 deletions(-) diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S index 4de9fbd..f362ecb 100644 --- a/arch/sparc/kernel/head_64.S +++ b/arch/sparc/kernel/head_64.S @@ -640,6 +640,8 @@ niagara4_patch: nop call niagara4_patch_pageops nop + call niagara4_patch_fls + nop ba,a,pt %xcc, 80f nop diff --git a/arch/sparc/lib/NG4patch.S b/arch/sparc/lib/NG4patch.S index 3cc0f8c..da65a3e 100644 --- a/arch/sparc/lib/NG4patch.S +++ b/arch/sparc/lib/NG4patch.S @@ -3,6 +3,8 @@ * Copyright (C) 2012 David S. Miller */ +#include + #define BRANCH_ALWAYS 0x10680000 #define NOP 0x01000000 #define NG_DO_PATCH(OLD, NEW) \ @@ -52,3 +54,10 @@ niagara4_patch_pageops: retl nop .size niagara4_patch_pageops,.-niagara4_patch_pageops + +ENTRY(niagara4_patch_fls) + NG_DO_PATCH(fls, NG4fls) + NG_DO_PATCH(__fls, __NG4fls) + retl + nop +ENDPROC(niagara4_patch_fls) -- 1.7.1