On 03/01/2016 09:02 AM, Aleksey Makarov wrote:
>
>
> On 03/01/2016 05:52 PM, Peter Hurley wrote:
>> On 02/29/2016 04:42 AM, Aleksey Makarov wrote:
>>> SBBR mentions DBG2 as a mandatory ACPI table.
>>> So enable it for ARM64
>>
>> Why does this have to be opted-in per-arch?
>
> DBG2 can specify earlycons. They should start as soon as possible.
> On ARM64 it is just after boot tables become available (in arch_init()).
> So it has to be per-arch unless we decide not to start earlycons on
> DBG2 ports.
OF does all that already but the earlycon opt-in is not per-arch.
>>> Signed-off-by: Aleksey Makarov <aleksey.makarov@xxxxxxxxxx>
>>> ---
>>> arch/arm64/Kconfig | 1 +
>>> arch/arm64/kernel/acpi.c | 2 ++
>>> 2 files changed, 3 insertions(+)
>>>
>>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>>> index 9dc5209..0b614d4 100644
>>> --- a/arch/arm64/Kconfig
>>> +++ b/arch/arm64/Kconfig
>>> @@ -3,6 +3,7 @@ config ARM64
>>> select ACPI_CCA_REQUIRED if ACPI
>>> select ACPI_GENERIC_GSI if ACPI
>>> select ACPI_REDUCED_HARDWARE_ONLY if ACPI
>>> + select ACPI_DBG2_TABLE if ACPI
>>> select ARCH_HAS_DEVMEM_IS_ALLOWED
>>> select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
>>> select ARCH_HAS_ELF_RANDOMIZE
>>> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
>>> index d1ce8e2..3370046 100644
>>> --- a/arch/arm64/kernel/acpi.c
>>> +++ b/arch/arm64/kernel/acpi.c
>>> @@ -208,6 +208,8 @@ void __init acpi_boot_table_init(void)
>>> pr_err("Failed to init ACPI tables\n");
>>> if (!param_acpi_force)
>>> disable_acpi();
>>> + } else {
>>> + acpi_probe_device_table(dbg2);
>>> }
>>> }
>>>
>>>
>>
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