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From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
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" <Suravee.Suthikulpanit@amd.com>
Subject: [PATCH 1/2] arm/arm64: ACPI: Introduce CONFIG_ACPI_MUST_HAVE_CCA
Date: Wed, 29 Apr 2015 08:44:08 -0500	[thread overview]
Message-ID: <1430315049-4663-2-git-send-email-Suravee.Suthikulpanit@amd.com> (raw)
In-Reply-To: <1430315049-4663-1-git-send-email-Suravee.Suthikulpanit@amd.com>

>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@redhat.com>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
 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


  reply	other threads:[~2015-04-29 13:44 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-29 13:44 [PATCH 0/2] ACPI : Introduce support for _CCA object Suravee Suthikulpanit
2015-04-29 13:44 ` Suravee Suthikulpanit [this message]
2015-04-29 14:04   ` [PATCH 1/2] arm/arm64: ACPI: Introduce CONFIG_ACPI_MUST_HAVE_CCA Catalin Marinas
2015-04-29 14:31     ` Suravee Suthikulpanit
2015-04-29 14:42       ` Catalin Marinas
2015-04-29 14:44         ` Suravee Suthikulpanit
2015-04-30 13:47         ` Hanjun Guo
2015-04-30 13:50           ` Will Deacon
2015-04-30 14:14             ` Hanjun Guo
2015-04-30 15:01             ` Lorenzo Pieralisi
2015-04-29 13:44 ` [PATCH 2/2] ACPI / scan: Parse _CCA and setup device coherency Suravee Suthikulpanit
2015-04-29 14:03   ` Arnd Bergmann
2015-04-29 14:45     ` Suravee Suthikulpanit
2015-04-29 14:47       ` [Linaro-acpi] " Arnd Bergmann
2015-04-29 14:57         ` Suthikulpanit, Suravee
2015-04-29 15:39           ` Al Stone
2015-04-29 16:15             ` Arnd Bergmann
2015-04-29 15:54           ` Arnd Bergmann
2015-05-01 11:06             ` Catalin Marinas
2015-05-08 14:08               ` Arnd Bergmann
2015-05-11 17:10                 ` Catalin Marinas
2015-05-11 17:24                   ` Robin Murphy
2015-04-29 16:25   ` Arnd Bergmann
2015-04-29 21:53     ` Suravee Suthikulpanit
2015-04-30  8:23       ` [Linaro-acpi] " Arnd Bergmann
2015-04-30 10:41         ` Will Deacon
2015-04-30 10:47           ` Arnd Bergmann
2015-04-30 11:07             ` Will Deacon
2015-04-30 11:24               ` Arnd Bergmann
2015-04-30 11:46                 ` Will Deacon
2015-04-30 13:03                   ` Arnd Bergmann
2015-04-30 13:13                     ` Will Deacon
2015-04-30 13:52                       ` Arnd Bergmann
2015-04-30 15:55                         ` Catalin Marinas
2015-05-08 14:01                           ` Arnd Bergmann
2015-04-30 23:39         ` Suravee Suthikulanit

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