x86/platform/UV: Move blade local processor ID to the per cpu info struct

Move references to blade local processor ID to the new per cpu info
structs.  Create an access function that makes this move, and other
potential moves opaque to callers of this function.  Define a flag
that indicates to callers in external GPL modules that this function
replaces any local definition.  This allows calling source code to be
built for both pre-UV4 kernels as well as post-UV4 kernels.

Tested-by: John Estabrook <estabrook@sgi.com>
Tested-by: Gary Kroening <gfk@sgi.com>
Tested-by: Nathan Zimmer <nzimmer@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Dimitri Sivanich <sivanich@sgi.com>
Cc: Andrew Banman <abanman@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <rja@sgi.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160429215404.644173122@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

4 files changed, 14 insertions, 7 deletions

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index b8c5a61..4a6f02a 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -159,7 +159,6 @@ struct uv_hub_info_s {
 	unsigned short		pnode_mask;
 	unsigned short		coherency_domain_number;
 	unsigned short		numa_blade_id;
-	unsigned char		blade_processor_id;
 	unsigned char		m_val;
 	unsigned char		n_val;
 };
@@ -572,9 +571,16 @@ extern short uv_possible_blades;
 /* Blade-local cpu number of current cpu. Numbered 0 .. <# cpus on the blade> */
 static inline int uv_blade_processor_id(void)
 {
-	return uv_hub_info->blade_processor_id;
+	return uv_cpu_info->blade_cpu_id;
 }
 
+/* Blade-local cpu number of cpu N. Numbered 0 .. <# cpus on the blade> */
+static inline int uv_cpu_blade_processor_id(int cpu)
+{
+	return uv_cpu_info_per(cpu)->blade_cpu_id;
+}
+#define _uv_cpu_blade_processor_id 1	/* indicate function available */
+
 /* Blade number of current cpu. Numnbered 0 .. <#blades -1> */
 static inline int uv_numa_blade_id(void)
 {
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index c8acda9..69aa2a9 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1055,12 +1055,12 @@ void __init uv_system_init(void)
 
 		uv_cpu_hub_info(cpu)->numa_blade_id = blade;
 		uv_cpu_hub_info(cpu)->pnode = pnode;
-		uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 		uv_node_to_blade[nodeid] = blade;
 		uv_cpu_to_blade[cpu] = blade;
 
 		/* Initialize per cpu info list */
 		uv_cpu_info_per(cpu)->p_uv_hub_info = uv_cpu_hub_info(cpu);
+		uv_cpu_info_per(cpu)->blade_cpu_id = lcpu;
 		uv_cpu_info_per(cpu)->scir.offset = uv_scir_offset(apicid);
 	}
 
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 534ab94..fdb4d42 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -2040,7 +2040,8 @@ static int scan_sock(struct socket_desc *sdp, struct uvhub_desc *bdp,
 			return 1;
 		}
 		bcp->uvhub_master = *hmasterp;
-		bcp->uvhub_cpu = uv_cpu_hub_info(cpu)->blade_processor_id;
+		bcp->uvhub_cpu = uv_cpu_blade_processor_id(cpu);
+
 		if (bcp->uvhub_cpu >= MAX_CPUS_PER_UVHUB) {
 			printk(KERN_EMERG "%d cpus per uvhub invalid\n",
 				bcp->uvhub_cpu);
diff --git a/arch/x86/platform/uv/uv_time.c b/arch/x86/platform/uv/uv_time.c
index 2b158a9..b333fc4 100644
--- a/arch/x86/platform/uv/uv_time.c
+++ b/arch/x86/platform/uv/uv_time.c
@@ -165,7 +165,7 @@ static __init int uv_rtc_allocate_timers(void)
 	for_each_present_cpu(cpu) {
 		int nid = cpu_to_node(cpu);
 		int bid = uv_cpu_to_blade_id(cpu);
-		int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
+		int bcpu = uv_cpu_blade_processor_id(cpu);
 		struct uv_rtc_timer_head *head = blade_info[bid];
 
 		if (!head) {
@@ -226,7 +226,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires)
 	int pnode = uv_cpu_to_pnode(cpu);
 	int bid = uv_cpu_to_blade_id(cpu);
 	struct uv_rtc_timer_head *head = blade_info[bid];
-	int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
+	int bcpu = uv_cpu_blade_processor_id(cpu);
 	u64 *t = &head->cpu[bcpu].expires;
 	unsigned long flags;
 	int next_cpu;
@@ -262,7 +262,7 @@ static int uv_rtc_unset_timer(int cpu, int force)
 	int pnode = uv_cpu_to_pnode(cpu);
 	int bid = uv_cpu_to_blade_id(cpu);
 	struct uv_rtc_timer_head *head = blade_info[bid];
-	int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
+	int bcpu = uv_cpu_blade_processor_id(cpu);
 	u64 *t = &head->cpu[bcpu].expires;
 	unsigned long flags;
 	int rc = 0;