linux-kernel - [tip:x86/platform] x86/platform/UV: Add UV Architecture Defines

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tip-e0ee1c97c3b1cabc3651d7bcf39c1f54d736fd20@git.kernel.org>
Date:	Wed, 4 May 2016 00:15:36 -0700
From:	tip-bot for Mike Travis <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	brgerst@...il.com, estabrook@....com, tglx@...utronix.de,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	rja@....com, travis@....com, mingo@...nel.org, abanman@....com,
	gfk@....com, len.brown@...el.com, sivanich@....com,
	luto@...capital.net, peterz@...radead.org, dvlasenk@...hat.com,
	torvalds@...ux-foundation.org, hpa@...or.com, bp@...en8.de,
	nzimmer@....com
Subject: [tip:x86/platform] x86/platform/UV: Add UV Architecture Defines

Commit-ID:  e0ee1c97c3b1cabc3651d7bcf39c1f54d736fd20
Gitweb:     http://git.kernel.org/tip/e0ee1c97c3b1cabc3651d7bcf39c1f54d736fd20
Author:     Mike Travis <travis@....com>
AuthorDate: Fri, 29 Apr 2016 16:54:04 -0500
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 4 May 2016 08:48:47 +0200

x86/platform/UV: Add UV Architecture Defines

Add defines to control which UV architectures are supported, and modify the
'if (is_uvX_*)' functions to return constant 0 for those not supported.
This will help optimize code paths when support for specific UV arches
is removed.

Tested-by: John Estabrook <estabrook@....com>
Tested-by: Gary Kroening <gfk@....com>
Tested-by: Nathan Zimmer <nzimmer@....com>
Signed-off-by: Mike Travis <travis@....com>
Reviewed-by: Dimitri Sivanich <sivanich@....com>
Cc: Andrew Banman <abanman@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Len Brown <len.brown@...el.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Russ Anderson <rja@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/20160429215402.897143440@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/asm/uv/uv_hub.h | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index 38166ad..6660c09a 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -178,22 +178,43 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
 #define UV3_HUB_REVISION_BASE		5
 #define UV4_HUB_REVISION_BASE		7
 
+#ifdef	UV1_HUB_IS_SUPPORTED
 static inline int is_uv1_hub(void)
 {
 	return uv_hub_info->hub_revision < UV2_HUB_REVISION_BASE;
 }
+#else
+static inline int is_uv1_hub(void)
+{
+	return 0;
+}
+#endif
 
+#ifdef	UV2_HUB_IS_SUPPORTED
 static inline int is_uv2_hub(void)
 {
 	return ((uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE) &&
 		(uv_hub_info->hub_revision < UV3_HUB_REVISION_BASE));
 }
+#else
+static inline int is_uv2_hub(void)
+{
+	return 0;
+}
+#endif
 
+#ifdef	UV3_HUB_IS_SUPPORTED
 static inline int is_uv3_hub(void)
 {
 	return ((uv_hub_info->hub_revision >= UV3_HUB_REVISION_BASE) &&
 		(uv_hub_info->hub_revision < UV4_HUB_REVISION_BASE));
 }
+#else
+static inline int is_uv3_hub(void)
+{
+	return 0;
+}
+#endif
 
 #ifdef	UV4_HUB_IS_SUPPORTED
 static inline int is_uv4_hub(void)
@@ -207,15 +228,20 @@ static inline int is_uv4_hub(void)
 }
 #endif
 
-static inline int is_uv_hub(void)
+static inline int is_uvx_hub(void)
 {
-	return uv_hub_info->hub_revision;
+	if (uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE)
+		return uv_hub_info->hub_revision;
+
+	return 0;
 }
 
-/* code common to uv2/3/4 only */
-static inline int is_uvx_hub(void)
+static inline int is_uv_hub(void)
 {
-	return uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE;
+#ifdef	UV1_HUB_IS_SUPPORTED
+	return uv_hub_info->hub_revision;
+#endif
+	return is_uvx_hub();
 }
 
 union uvh_apicid {