linux-kernel - [tip:x86/platform] x86/platform/UV: Add UV4 Specific Defines

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Date:	Wed, 4 May 2016 00:16:00 -0700
From:	tip-bot for Mike Travis <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, brgerst@...il.com, mingo@...nel.org,
	linux-kernel@...r.kernel.org, luto@...capital.net,
	dvlasenk@...hat.com, len.brown@...el.com, hpa@...or.com,
	gfk@....com, abanman@....com, estabrook@....com,
	akpm@...ux-foundation.org, sivanich@....com, bp@...en8.de,
	nzimmer@....com, peterz@...radead.org, travis@....com,
	torvalds@...ux-foundation.org, rja@....com
Subject: [tip:x86/platform] x86/platform/UV: Add UV4 Specific Defines

Commit-ID:  a0ec83f316e1d933d8c820d249972574324c2d25
Gitweb:     http://git.kernel.org/tip/a0ec83f316e1d933d8c820d249972574324c2d25
Author:     Mike Travis <travis@....com>
AuthorDate: Fri, 29 Apr 2016 16:54:05 -0500
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 4 May 2016 08:48:47 +0200

x86/platform/UV: Add UV4 Specific Defines

Add UV4 specific defines to determine if current system type is a
UV4 system.

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/20160429215403.072323684@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/apic/x2apic_uv_x.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 8f4942e..9086d95 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -108,6 +108,9 @@ static int __init early_get_pnodeid(void)
 	case UV3_HUB_PART_NUMBER_X:
 		uv_min_hub_revision_id += UV3_HUB_REVISION_BASE;
 		break;
+	case UV4_HUB_PART_NUMBER:
+		uv_min_hub_revision_id += UV4_HUB_REVISION_BASE - 1;
+		break;
 	}
 
 	uv_hub_info->hub_revision = uv_min_hub_revision_id;
@@ -155,8 +158,10 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 	 *   SGI: UV100/1000
 	 *   SGI2: UV2000/3000
 	 *   SGI3: UV300 (truncated to 4 chars because of different varieties)
+	 *   SGI4: UV400 (truncated to 4 chars because of different varieties)
 	 */
 	uv_hub_info->hub_revision =
+		!strncmp(oem_id, "SGI4", 4) ? UV4_HUB_REVISION_BASE :
 		!strncmp(oem_id, "SGI3", 4) ? UV3_HUB_REVISION_BASE :
 		!strcmp(oem_id, "SGI2") ? UV2_HUB_REVISION_BASE :
 		!strcmp(oem_id, "SGI") ? UV1_HUB_REVISION_BASE : 0;
@@ -881,9 +886,10 @@ void __init uv_system_init(void)
 	unsigned long mmr_base, present, paddr;
 	unsigned short pnode_mask;
 	unsigned char n_lshift;
-	char *hub = (is_uv1_hub() ? "UV100/1000" :
-		    (is_uv2_hub() ? "UV2000/3000" :
-		    (is_uv3_hub() ? "UV300" : NULL)));
+	char *hub = is_uv4_hub() ? "UV400" :
+		    is_uv3_hub() ? "UV300" :
+		    is_uv2_hub() ? "UV2000/3000" :
+		    is_uv1_hub() ? "UV100/1000" : NULL;
 
 	if (!hub) {
 		pr_err("UV: Unknown/unsupported UV hub\n");