[PATCH] x86/boot: adding hw subarch ID for Moorestown

[Jacob Pan]

    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.

Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxx>
---
 Documentation/x86/boot.txt       |    1 +
 arch/x86/include/asm/bootparam.h |    5 +++++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt
index 8da3a79..30b43e1 100644
--- a/Documentation/x86/boot.txt
+++ b/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)
diff --git a/arch/x86/include/asm/bootparam.h b/arch/x86/include/asm/bootparam.h
index 1724e8d..117ab6b 100644
--- a/arch/x86/include/asm/bootparam.h
+++ b/arch/x86/include/asm/bootparam.h
@@ -109,4 +109,9 @@ struct boot_params {
 	__u8  _pad9[276];				/* 0xeec */
 } __attribute__((packed));
 
+#define N_X86_SUBARCHS			4
+#define X86_SUBARCH_PC			0
+#define X86_SUBARCH_LGUEST 		1
+#define X86_SUBARCH_XEN			2
+#define X86_SUBARCH_MRST		3
 #endif /* _ASM_X86_BOOTPARAM_H */
-- 
1.5.6.5

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