>From ACPIv6 (http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf), section 6.2.17 _CCA states that ARM platforms require ACPI _CCA object to be specified for DMA-cabpable devices. This patch introduces ACPI_MUST_HAVE_CCA in arm and arm64 Kconfig to specify such requirement. Note that when _CCA is required, if it is missing in the DSDT. ACPI driver will default to setting up devices as non-coherent. Signed-off-by: Mark Salter <msalter@xxxxxxxxxx> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> --- arch/arm/Kconfig | 1 + arch/arm64/Kconfig | 1 + drivers/acpi/Kconfig | 3 +++ 3 files changed, 5 insertions(+) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 45df48b..2a0d036 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1,6 +1,7 @@ config ARM bool default y + select ACPI_MUST_HAVE_CCA if ACPI select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4269dba..e5471f8 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1,6 +1,7 @@ config ARM64 def_bool y select ACPI_GENERIC_GSI if ACPI + select ACPI_MUST_HAVE_CCA if ACPI select ACPI_REDUCED_HARDWARE_ONLY if ACPI select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ELF_RANDOMIZE diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index ab2cbb5..620ee67 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -54,6 +54,9 @@ config ACPI_GENERIC_GSI config ACPI_SYSTEM_POWER_STATES_SUPPORT bool +config ACPI_MUST_HAVE_CCA + bool + config ACPI_SLEEP bool depends on SUSPEND || HIBERNATION -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
