diff options
Diffstat (limited to 'arch/mips/cavium-octeon/smp.c')
| -rw-r--r-- | arch/mips/cavium-octeon/smp.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c index a7b3ae104d8c..ecd903dd1c45 100644 --- a/arch/mips/cavium-octeon/smp.c +++ b/arch/mips/cavium-octeon/smp.c @@ -84,9 +84,14 @@ static void octeon_smp_hotplug_setup(void) #ifdef CONFIG_HOTPLUG_CPU struct linux_app_boot_info *labi; + if (!setup_max_cpus) + return; + labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER); - if (labi->labi_signature != LABI_SIGNATURE) - panic("The bootloader version on this board is incorrect."); + if (labi->labi_signature != LABI_SIGNATURE) { + pr_info("The bootloader on this board does not support HOTPLUG_CPU."); + return; + } octeon_bootloader_entry_addr = labi->InitTLBStart_addr; #endif @@ -129,7 +134,8 @@ static void octeon_smp_setup(void) * will assign CPU numbers for possible cores as well. Cores * are always consecutively numberd from 0. */ - for (id = 0; id < num_cores && id < NR_CPUS; id++) { + for (id = 0; setup_max_cpus && octeon_bootloader_entry_addr && + id < num_cores && id < NR_CPUS; id++) { if (!(core_mask & (1 << id))) { set_cpu_possible(cpus, true); __cpu_number_map[id] = cpus; @@ -192,14 +198,6 @@ static void octeon_init_secondary(void) */ void octeon_prepare_cpus(unsigned int max_cpus) { -#ifdef CONFIG_HOTPLUG_CPU - struct linux_app_boot_info *labi; - - labi = (struct linux_app_boot_info *)PHYS_TO_XKSEG_CACHED(LABI_ADDR_IN_BOOTLOADER); - - if (labi->labi_signature != LABI_SIGNATURE) - panic("The bootloader version on this board is incorrect."); -#endif /* * Only the low order mailbox bits are used for IPIs, leave * the other bits alone. @@ -237,6 +235,9 @@ static int octeon_cpu_disable(void) if (cpu == 0) return -EBUSY; + if (!octeon_bootloader_entry_addr) + return -ENOTSUPP; + set_cpu_online(cpu, false); cpu_clear(cpu, cpu_callin_map); local_irq_disable(); |