From mboxrd@z Thu Jan 1 00:00:00 1970 From: Suravee Suthikulpanit Subject: [PATCH 1/2] arm/arm64: ACPI: Introduce CONFIG_ACPI_MUST_HAVE_CCA Date: Wed, 29 Apr 2015 08:44:08 -0500 Message-ID: <1430315049-4663-2-git-send-email-Suravee.Suthikulpanit@amd.com> References: <1430315049-4663-1-git-send-email-Suravee.Suthikulpanit@amd.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from mail-by2on0104.outbound.protection.outlook.com ([207.46.100.104]:31507 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1422969AbbD2NoQ (ORCPT ); Wed, 29 Apr 2015 09:44:16 -0400 In-Reply-To: <1430315049-4663-1-git-send-email-Suravee.Suthikulpanit@amd.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com Cc: msalter@redhat.com, hanjun.guo@linaro.org, al.stone@linaro.org, grant.likely@linaro.org, arnd@arndb.de, leo.duran@amd.com, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org, Suravee Suthikulpanit >>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 Signed-off-by: Suravee Suthikulpanit --- 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