[patch 2/3] x86/boot: adding hw subarch ID for Moorestown

[Thomas Gleixner]

From: Jacob Pan <jacob.jun.pan@xxxxxxxxx>
Date: Thu, 11 Jun 2009 20:34:47 -0700
Subject: [patch 2/3] [PATCH] x86/boot: adding hw subarch ID for Moorestown

x86 bootprotocol 2.07 has introduced hardware_subarch ID in the boot
parameters provided by FW. We use it to identify Moorestown platforms.

The subarchitecture ID will help select a set of platform features and
x86_quirks.

[ tglx: Cleanup and paravirt fix ]

Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 Documentation/x86/boot.txt       |    1 +
 arch/x86/include/asm/bootparam.h |   10 ++++++++++
 arch/x86/kernel/head_32.S        |    1 +
 3 files changed, 12 insertions(+)

Index: linux-2.6-tip/Documentation/x86/boot.txt
===================================================================
--- linux-2.6-tip.orig/Documentation/x86/boot.txt
+++ linux-2.6-tip/Documentation/x86/boot.txt
@@ -599,6 +599,7 @@ Protocol:	2.07+
   0x00000000	The default x86/PC environment
   0x00000001	lguest
   0x00000002	Xen
+  0x00000003	Moorestown MID
 
 Field name:	hardware_subarch_data
 Type:		write (subarch-dependent)
Index: linux-2.6-tip/arch/x86/include/asm/bootparam.h
===================================================================
--- linux-2.6-tip.orig/arch/x86/include/asm/bootparam.h
+++ linux-2.6-tip/arch/x86/include/asm/bootparam.h
@@ -109,4 +109,14 @@ struct boot_params {
 	__u8  _pad9[276];				/* 0xeec */
 } __attribute__((packed));
 
+enum {
+	X86_SUBARCH_PC = 0,
+	X86_SUBARCH_LGUEST,
+	X86_SUBARCH_XEN,
+	X86_SUBARCH_MRST,
+	X86_NR_SUBARCHS,
+};
+
+
+
 #endif /* _ASM_X86_BOOTPARAM_H */
Index: linux-2.6-tip/arch/x86/kernel/head_32.S
===================================================================
--- linux-2.6-tip.orig/arch/x86/kernel/head_32.S
+++ linux-2.6-tip/arch/x86/kernel/head_32.S
@@ -157,6 +157,7 @@ subarch_entries:
 	.long default_entry		/* normal x86/PC */
 	.long lguest_entry		/* lguest hypervisor */
 	.long xen_entry			/* Xen hypervisor */
+	.long default_entry		/* Moorestown MID */
 num_subarch_entries = (. - subarch_entries) / 4
 .previous
 #endif /* CONFIG_PARAVIRT */


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