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| author |   Aaro Koskinen <aaro.koskinen@iki.fi> | 2014-06-28 00:59:52 +0300 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2014-08-02 00:06:42 +0200 |
| commit | eac44d9c956b3c5a6b5aaf666d5ae6226a1cc1d2 (patch) | |
| tree | 711c567250561c600ca2ed9bc54018b49afa0b5c /arch/mips/cavium-octeon/smp.c | |
| parent | MIPS: OCTEON: support disabling HOTPLUG_CPU run-time (diff) | |
| download | linux-dev-eac44d9c956b3c5a6b5aaf666d5ae6226a1cc1d2.tar.xz linux-dev-eac44d9c956b3c5a6b5aaf666d5ae6226a1cc1d2.zip | |
MIPS: OCTEON: disable HOTPLUG_CPU if the bootloader version is incorrect
Disable HOTPLUG_CPU functionality if the bootloader version is incorrect.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: linux-mips@linux-mips.org
Cc: David Daney <ddaney.cavm@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/7200/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/cavium-octeon/smp.c')
| -rw-r--r-- | arch/mips/cavium-octeon/smp.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c index ea969309b35f..ecd903dd1c45 100644 --- a/arch/mips/cavium-octeon/smp.c +++ b/arch/mips/cavium-octeon/smp.c @@ -88,8 +88,10 @@ static void octeon_smp_hotplug_setup(void) 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 @@ -132,7 +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; setup_max_cpus && 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; @@ -232,6 +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(); |