xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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>
This commit is contained in:
David S. Miller
2007-07-14 00:45:16 -07:00
parent f8be339c02
commit b14f5c100c
5 changed files with 59 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
arch/sparc64/kernel/smp.c
View File

@@ -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);