[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>

1 files changed, 51 insertions, 1 deletions

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);