From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Mon, 25 Oct 2010 14:10:52 +0000 (+0200)
Subject: [S390] topology: clean up facility detection
X-Git-Tag: 2.1b_release~6473^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9186d7a9cfd75e51ac4db4a40e0a558371988bd2;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git

[S390] topology: clean up facility detection

Move cpu topology facility detection to early setup code where it
should be.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index 25e831d..d5e2ef1 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -73,6 +73,7 @@ extern unsigned int user_mode;
 #define MACHINE_FLAG_PFMF	(1UL << 11)
 #define MACHINE_FLAG_LPAR	(1UL << 12)
 #define MACHINE_FLAG_SPP	(1UL << 13)
+#define MACHINE_FLAG_TOPOLOGY	(1UL << 14)
 
 #define MACHINE_IS_VM		(S390_lowcore.machine_flags & MACHINE_FLAG_VM)
 #define MACHINE_IS_KVM		(S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
@@ -90,6 +91,7 @@ extern unsigned int user_mode;
 #define MACHINE_HAS_HPAGE	(0)
 #define MACHINE_HAS_PFMF	(0)
 #define MACHINE_HAS_SPP		(0)
+#define MACHINE_HAS_TOPOLOGY	(0)
 #else /* __s390x__ */
 #define MACHINE_HAS_IEEE	(1)
 #define MACHINE_HAS_CSP		(1)
@@ -100,6 +102,7 @@ extern unsigned int user_mode;
 #define MACHINE_HAS_HPAGE	(S390_lowcore.machine_flags & MACHINE_FLAG_HPAGE)
 #define MACHINE_HAS_PFMF	(S390_lowcore.machine_flags & MACHINE_FLAG_PFMF)
 #define MACHINE_HAS_SPP		(S390_lowcore.machine_flags & MACHINE_FLAG_SPP)
+#define MACHINE_HAS_TOPOLOGY	(S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
 #endif /* __s390x__ */
 
 #define ZFCPDUMP_HSA_SIZE	(32UL<<20)
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index d2455d4..d149609 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -382,6 +382,8 @@ static __init void detect_machine_facilities(void)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
 	if (test_facility(8))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF;
+	if (test_facility(11))
+		S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY;
 	if (test_facility(27))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
 	if (test_facility(40))
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 91fb66b..6900441 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -66,7 +66,6 @@ struct mask_info {
 static int topology_enabled = 1;
 static void topology_work_fn(struct work_struct *work);
 static struct tl_info *tl_info;
-static int machine_has_topology;
 static struct timer_list topology_timer;
 static void set_topology_timer(void);
 static DECLARE_WORK(topology_work, topology_work_fn);
@@ -88,7 +87,7 @@ static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
 	cpumask_t mask;
 
 	cpus_clear(mask);
-	if (!topology_enabled || !machine_has_topology)
+	if (!topology_enabled || !MACHINE_HAS_TOPOLOGY)
 		return cpu_possible_map;
 	while (info) {
 		if (cpu_isset(cpu, info->mask)) {
@@ -186,7 +185,6 @@ static void tl_to_cores(struct tl_info *info)
 			break;
 		default:
 			clear_masks();
-			machine_has_topology = 0;
 			goto out;
 		}
 		tle = next_tle(tle);
@@ -223,7 +221,7 @@ int topology_set_cpu_management(int fc)
 	int cpu;
 	int rc;
 
-	if (!machine_has_topology)
+	if (!MACHINE_HAS_TOPOLOGY)
 		return -EOPNOTSUPP;
 	if (fc)
 		rc = ptf(PTF_VERTICAL);
@@ -269,7 +267,7 @@ int arch_update_cpu_topology(void)
 	struct sys_device *sysdev;
 	int cpu;
 
-	if (!machine_has_topology) {
+	if (!MACHINE_HAS_TOPOLOGY) {
 		update_cpu_core_map();
 		topology_update_polarization_simple();
 		return 0;
@@ -323,7 +321,7 @@ static int __init init_topology_update(void)
 	int rc;
 
 	rc = 0;
-	if (!machine_has_topology) {
+	if (!MACHINE_HAS_TOPOLOGY) {
 		topology_update_polarization_simple();
 		goto out;
 	}
@@ -354,10 +352,8 @@ void __init s390_init_cpu_topology(void)
 	struct tl_info *info;
 	int i;
 
-	if (!test_facility(2) || !test_facility(11))
+	if (!MACHINE_HAS_TOPOLOGY)
 		return;
-	machine_has_topology = 1;
-
 	tl_info = alloc_bootmem_pages(PAGE_SIZE);
 	info = tl_info;
 	store_topology(info);