[SPARC64]: Fix build regressions added by dr-cpu changes.

Do not select HOTPLUG_CPU from SUN_LDOMS, that causes
HOTPLUG_CPU to be selected even on non-SMP which is
illegal.

Only build hvtramp.o when SMP, just like trampoline.o

Protect dr-cpu code in ds.c with HOTPLUG_CPU.

Likewise move ldom_startcpu_cpuid() to smp.c and protect
it and the call site with SUN_LDOMS && HOTPLUG_CPU.

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 59 insertions, 53 deletions

diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 3c2e3397caf8..b84b6af1241e 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -316,7 +316,6 @@ config SUN_IO
 
 config SUN_LDOMS
         bool "Sun Logical Domains support"
-        select HOTPLUG_CPU
         help
           Say Y here is you want to support virtual devices via
           Logical Domains.
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index 62db93c148cd..b66876bf410c 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/arch/sparc64/kernel/Makefile
@@ -12,14 +12,13 @@ obj-y		:= process.o setup.o cpu.o idprom.o \
                    irq.o ptrace.o time.o sys_sparc.o signal.o \
                    unaligned.o central.o pci.o starfire.o semaphore.o \
                    power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
-                   visemul.o prom.o of_device.o hvapi.o sstate.o mdesc.o \
-                   hvtramp.o
+                   visemul.o prom.o of_device.o hvapi.o sstate.o mdesc.o
 
 obj-$(CONFIG_STACKTRACE) += stacktrace.o
 obj-$(CONFIG_PCI)        += ebus.o isa.o pci_common.o pci_iommu.o \
                             pci_psycho.o pci_sabre.o pci_schizo.o \
                             pci_sun4v.o pci_sun4v_asm.o pci_fire.o
-obj-$(CONFIG_SMP)        += smp.o trampoline.o
+obj-$(CONFIG_SMP)        += smp.o trampoline.o hvtramp.o
 obj-$(CONFIG_SPARC32_COMPAT) += sys32.o sys_sparc32.o signal32.o
 obj-$(CONFIG_BINFMT_ELF32) += binfmt_elf32.o
 obj-$(CONFIG_BINFMT_AOUT32) += binfmt_aout32.o
diff --git a/arch/sparc64/kernel/ds.c b/arch/sparc64/kernel/ds.c
index b82c03a25d9c..2e4114fba142 100644
--- a/arch/sparc64/kernel/ds.c
+++ b/arch/sparc64/kernel/ds.c
@@ -148,9 +148,11 @@ static void domain_shutdown_data(struct ldc_channel *lp,
 static void domain_panic_data(struct ldc_channel *lp,
                               struct ds_cap_state *cp,
                               void *buf, int len);
+#ifdef CONFIG_HOTPLUG_CPU
 static void dr_cpu_data(struct ldc_channel *lp,
                         struct ds_cap_state *cp,
                         void *buf, int len);
+#endif
 static void ds_pri_data(struct ldc_channel *lp,
                         struct ds_cap_state *cp,
                         void *buf, int len);
@@ -171,10 +173,12 @@ struct ds_cap_state ds_states[] = {
                 .service_id     = "domain-panic",
                 .data           = domain_panic_data,
         },
+#ifdef CONFIG_HOTPLUG_CPU
         {
                 .service_id     = "dr-cpu",
                 .data           = dr_cpu_data,
         },
+#endif
         {
                 .service_id     = "pri",
                 .data           = ds_pri_data,
@@ -355,6 +359,7 @@ static void domain_panic_data(struct ldc_channel *lp,
         panic("PANIC requested by LDOM manager.");
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
 struct dr_cpu_tag {
         __u64                           req_num;
         __u32                           type;
@@ -395,54 +400,6 @@ static unsigned long kimage_addr_to_ra(void *p)
         return kern_base + (val - KERNBASE);
 }
 
-void ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg)
-{
-        extern unsigned long sparc64_ttable_tl0;
-        extern unsigned long kern_locked_tte_data;
-        extern int bigkernel;
-        struct hvtramp_descr *hdesc;
-        unsigned long trampoline_ra;
-        struct trap_per_cpu *tb;
-        u64 tte_vaddr, tte_data;
-        unsigned long hv_err;
-
-        hdesc = kzalloc(sizeof(*hdesc), GFP_KERNEL);
-        if (!hdesc) {
-                printk(KERN_ERR PFX "ldom_startcpu_cpuid: Cannot allocate "
-                       "hvtramp_descr.\n");
-                return;
-        }
-
-        hdesc->cpu = cpu;
-        hdesc->num_mappings = (bigkernel ? 2 : 1);
-
-        tb = &trap_block[cpu];
-        tb->hdesc = hdesc;
-
-        hdesc->fault_info_va = (unsigned long) &tb->fault_info;
-        hdesc->fault_info_pa = kimage_addr_to_ra(&tb->fault_info);
-
-        hdesc->thread_reg = thread_reg;
-
-        tte_vaddr = (unsigned long) KERNBASE;
-        tte_data = kern_locked_tte_data;
-
-        hdesc->maps[0].vaddr = tte_vaddr;
-        hdesc->maps[0].tte   = tte_data;
-        if (bigkernel) {
-                tte_vaddr += 0x400000;
-                tte_data  += 0x400000;
-                hdesc->maps[1].vaddr = tte_vaddr;
-                hdesc->maps[1].tte   = tte_data;
-        }
-
-        trampoline_ra = kimage_addr_to_ra(hv_cpu_startup);
-
-        hv_err = sun4v_cpu_start(cpu, trampoline_ra,
-                                 kimage_addr_to_ra(&sparc64_ttable_tl0),
-                                 __pa(hdesc));
-}
-
 /* DR cpu requests get queued onto the work list by the
  * dr_cpu_data() callback.  The list is protected by
  * ds_lock, and processed by dr_cpu_process() in order.
@@ -704,6 +661,7 @@ static void dr_cpu_data(struct ldc_channel *lp,
                 schedule_work(&dr_cpu_work);
         }
 }
+#endif
 
 struct ds_pri_msg {
         __u64                           req_num;
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 315eef0869bd..833b284616a4 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -281,6 +281,56 @@ static void smp_synchronize_one_tick(int cpu)
         spin_unlock_irqrestore(&itc_sync_lock, flags);
 }
 
+#if defined(CONFIG_SUN_LDOMS) && defined(CONFIG_HOTPLUG_CPU)
+static void ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg)
+{
+        extern unsigned long sparc64_ttable_tl0;
+        extern unsigned long kern_locked_tte_data;
+        extern int bigkernel;
+        struct hvtramp_descr *hdesc;
+        unsigned long trampoline_ra;
+        struct trap_per_cpu *tb;
+        u64 tte_vaddr, tte_data;
+        unsigned long hv_err;
+
+        hdesc = kzalloc(sizeof(*hdesc), GFP_KERNEL);
+        if (!hdesc) {
+                printk(KERN_ERR PFX "ldom_startcpu_cpuid: Cannot allocate "
+                       "hvtramp_descr.\n");
+                return;
+        }
+
+        hdesc->cpu = cpu;
+        hdesc->num_mappings = (bigkernel ? 2 : 1);
+
+        tb = &trap_block[cpu];
+        tb->hdesc = hdesc;
+
+        hdesc->fault_info_va = (unsigned long) &tb->fault_info;
+        hdesc->fault_info_pa = kimage_addr_to_ra(&tb->fault_info);
+
+        hdesc->thread_reg = thread_reg;
+
+        tte_vaddr = (unsigned long) KERNBASE;
+        tte_data = kern_locked_tte_data;
+
+        hdesc->maps[0].vaddr = tte_vaddr;
+        hdesc->maps[0].tte   = tte_data;
+        if (bigkernel) {
+                tte_vaddr += 0x400000;
+                tte_data  += 0x400000;
+                hdesc->maps[1].vaddr = tte_vaddr;
+                hdesc->maps[1].tte   = tte_data;
+        }
+
+        trampoline_ra = kimage_addr_to_ra(hv_cpu_startup);
+
+        hv_err = sun4v_cpu_start(cpu, trampoline_ra,
+                                 kimage_addr_to_ra(&sparc64_ttable_tl0),
+                                 __pa(hdesc));
+}
+#endif
+
 extern void sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int load);
 
 extern unsigned long sparc64_cpu_startup;
@@ -309,7 +359,7 @@ static int __devinit smp_boot_one_cpu(unsigned int cpu)
                 /* Alloc the mondo queues, cpu will load them.  */
                 sun4v_init_mondo_queues(0, cpu, 1, 0);
 
-#ifdef CONFIG_SUN_LDOMS
+#if defined(CONFIG_SUN_LDOMS) && defined(CONFIG_HOTPLUG_CPU)
                 if (ldom_domaining_enabled)
                         ldom_startcpu_cpuid(cpu,
                                             (unsigned long) cpu_new_thread);