linux-kernel - [tip:x86/uv] x86: UV BAU: Increase maximum CPUs per socket/hub

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Date:	Mon, 3 Nov 2014 04:51:52 -0800
From:	tip-bot for James Custer <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, tglx@...utronix.de, mingo@...nel.org,
	jcuster@....com, linux-kernel@...r.kernel.org, rja@....com
Subject: [tip:x86/uv] x86: UV BAU: Increase maximum CPUs per socket/hub

Commit-ID:  3ab0c49fd6b1e80438d0a649584d292880112262
Gitweb:     http://git.kernel.org/tip/3ab0c49fd6b1e80438d0a649584d292880112262
Author:     James Custer <jcuster@....com>
AuthorDate: Sun, 2 Nov 2014 12:16:38 -0600
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 3 Nov 2014 13:49:24 +0100

x86: UV BAU: Increase maximum CPUs per socket/hub

We have encountered hardware with 18 cores/socket that gives 36 CPUs/socket
with hyperthreading enabled. This exceeds the current MAX_CPUS_PER_SOCKET
causing a failure in get_cpu_topology. Increase MAX_CPUS_PER_SOCKET to 64
and MAX_CPUS_PER_UVHUB to 128.

Signed-off-by: James Custer <jcuster@....com>
Cc: Russ Anderson <rja@....com>
Link: http://lkml.kernel.org/r/1414952199-185319-1-git-send-email-jcuster@sgi.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/include/asm/uv/uv_bau.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h
index 2d60a78..fc808b8 100644
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -33,8 +33,8 @@
  * Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
  */
 
-#define MAX_CPUS_PER_UVHUB		64
-#define MAX_CPUS_PER_SOCKET		32
+#define MAX_CPUS_PER_UVHUB		128
+#define MAX_CPUS_PER_SOCKET		64
 #define ADP_SZ				64 /* hardware-provided max. */
 #define UV_CPUS_PER_AS			32 /* hardware-provided max. */
 #define ITEMS_PER_DESC			8
--
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