[IA64] multi-core/multi-thread identification

Version 3 - rediffed to apply on top of Ashok's hotplug cpu
patch.  /proc/cpuinfo output in step with x86.

This is an updated MC/MT identification patch based on the 
previous discussions on list. 

Add the Multi-core and Multi-threading detection for IPF.
  - Add new core and threading related fields in /proc/cpuinfo.
		Physical id
		Core id
		Thread id
		Siblings
  - setup the cpu_core_map and cpu_sibling_map appropriately
  - Handles Hot plug CPU
 
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Gordon Jin <gordon.jin@intel.com>
Signed-off-by: Rohit Seth <rohit.seth@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/asm-ia64/sal.h b/include/asm-ia64/sal.h
index 240676f7539..29df88bdd2b 100644
--- a/include/asm-ia64/sal.h
+++ b/include/asm-ia64/sal.h
@@ -91,6 +91,7 @@ extern spinlock_t sal_lock;
 #define SAL_PCI_CONFIG_READ		0x01000010
 #define SAL_PCI_CONFIG_WRITE		0x01000011
 #define SAL_FREQ_BASE			0x01000012
+#define SAL_PHYSICAL_ID_INFO		0x01000013
 
 #define SAL_UPDATE_PAL			0x01000020
 
@@ -815,6 +816,17 @@ ia64_sal_update_pal (u64 param_buf, u64 scratch_buf, u64 scratch_buf_size,
 	return isrv.status;
 }
 
+/* Get physical processor die mapping in the platform. */
+static inline s64
+ia64_sal_physical_id_info(u16 *splid)
+{
+	struct ia64_sal_retval isrv;
+	SAL_CALL(isrv, SAL_PHYSICAL_ID_INFO, 0, 0, 0, 0, 0, 0, 0);
+	if (splid)
+		*splid = isrv.v0;
+	return isrv.status;
+}
+
 extern unsigned long sal_platform_features;
 
 extern int (*salinfo_platform_oemdata)(const u8 *, u8 **, u64 *);