All of lore.kernel.org
 help / color / mirror / Atom feed
From: Vijay Kumar <vijay.ac.kumar@oracle.com>
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	[thread overview]
Message-ID: <1507308893-9218-6-git-send-email-vijay.ac.kumar@oracle.com> (raw)
In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com>

For T4 and above, patch fls and __fls functions
at the boot time to use lzcnt instruction.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
---
 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 <davem@davemloft.net>
  */
 
+#include <linux/linkage.h>
+
 #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

WARNING: multiple messages have this Message-ID (diff)
From: Vijay Kumar <vijay.ac.kumar@oracle.com>
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, 06 Oct 2017 16:54:53 +0000	[thread overview]
Message-ID: <1507308893-9218-6-git-send-email-vijay.ac.kumar@oracle.com> (raw)
In-Reply-To: <1507308893-9218-1-git-send-email-vijay.ac.kumar@oracle.com>

For T4 and above, patch fls and __fls functions
at the boot time to use lzcnt instruction.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
---
 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 <davem@davemloft.net>
  */
 
+#include <linux/linkage.h>
+
 #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


  parent reply	other threads:[~2017-10-06 16:55 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-06 16:54 [PATCH v3 0/5] sparc64: Optimize fls and __fls Vijay Kumar
2017-10-06 16:54 ` Vijay Kumar
2017-10-06 16:54 ` [PATCH v3 1/5] sparc64: Define SPARC default fls function Vijay Kumar
2017-10-06 16:54   ` Vijay Kumar
2017-10-06 16:54 ` [PATCH v3 2/5] sparc64: Define SPARC default __fls function Vijay Kumar
2017-10-06 16:54   ` Vijay Kumar
2017-10-06 16:54 ` [PATCH v3 3/5] sparc64: SPARC optimised fls function Vijay Kumar
2017-10-06 16:54   ` Vijay Kumar
2017-10-06 23:28   ` Anthony Yznaga
2017-10-06 23:28     ` Anthony Yznaga
2017-10-09  4:39   ` David Miller
2017-10-09  4:39     ` David Miller
2017-10-09 15:12     ` Vijay Kumar
2017-10-09 15:12       ` Vijay Kumar
2017-10-06 16:54 ` [PATCH v3 4/5] sparc64: SPARC optimised __fls function Vijay Kumar
2017-10-06 16:54   ` Vijay Kumar
2017-10-06 16:54 ` Vijay Kumar [this message]
2017-10-06 16:54   ` [PATCH v3 5/5] sparc64: Use sparc optimised fls and __fls for T4 and above Vijay Kumar

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1507308893-9218-6-git-send-email-vijay.ac.kumar@oracle.com \
    --to=vijay.ac.kumar@oracle.com \
    --cc=babu.moger@oracle.com \
    --cc=davem@davemloft.net \
    --cc=linux-kernel@vger.kernel.org \
    --cc=rob.gardner@oracle.com \
    --cc=sam@ravnborg.org \
    --cc=sparclinux@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.