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Tue, 4 Apr 2017 10:19:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1491301173; bh=Kn6OKTqlzyi82VTQOluZav2hhs2cYTX57h6MP3uaxsU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D2wZbx4wDVaXReWLF2pCwYRUTcPJBHtgQW3fg8mvchw8o/BbMt3C3kW5YcuaCuBfd mPsidDDB0GR18dpNQSmHQN7cJmpb0ZtrZQYR0JqxuMfMbfTjFPgjxcGPepj17Ag1dL YxyJX2SaYBVpp6hugjy7WqGNU0m6hJowGUGu7vBs= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 896F660DDD Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=sricharan@codeaurora.org From: Sricharan R To: robin.murphy@arm.com, will.deacon@arm.com, joro@8bytes.org, lorenzo.pieralisi@arm.com, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, m.szyprowski@samsung.com, bhelgaas@google.com, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, tn@semihalf.com, hanjun.guo@linaro.org, okaya@codeaurora.org, robh+dt@kernel.org, frowand.list@gmail.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org, catalin.marinas@arm.com, arnd@arndb.de, linux-arch@vger.kernel.org, gregkh@linuxfoundation.org Subject: [PATCH V10 05/12] ACPI/IORT: Add function to check SMMUs drivers presence Date: Tue, 4 Apr 2017 15:48:18 +0530 Message-Id: <1491301105-5274-6-git-send-email-sricharan@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1491301105-5274-1-git-send-email-sricharan@codeaurora.org> References: <1489086061-9356-1-git-send-email-sricharan@codeaurora.org> <1491301105-5274-1-git-send-email-sricharan@codeaurora.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170404_031951_819218_E8000EEC X-CRM114-Status: GOOD ( 11.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sricharan@codeaurora.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Lorenzo Pieralisi The IOMMU probe deferral implementation requires a mechanism to detect if drivers for SMMU components are built-in in the kernel to detect whether IOMMU configuration for a given device should be deferred (ie SMMU drivers present but still not probed) or not (drivers not present). Add a simple function to IORT to detect if SMMU drivers for SMMU components managed by IORT are built-in in the kernel. Tested-by: Hanjun Guo Signed-off-by: Lorenzo Pieralisi Cc: Robin Murphy Cc: Sricharan R Reviewed-by: Robin Murphy --- drivers/acpi/arm64/iort.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 4a5bb96..3dd9ec3 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -523,6 +523,19 @@ static int arm_smmu_iort_xlate(struct device *dev, u32 streamid, return ret; } +static inline bool iort_iommu_driver_enabled(u8 type) +{ + switch (type) { + case ACPI_IORT_NODE_SMMU_V3: + return IS_BUILTIN(CONFIG_ARM_SMMU_V3); + case ACPI_IORT_NODE_SMMU: + return IS_BUILTIN(CONFIG_ARM_SMMU); + default: + pr_warn("IORT node type %u does not describe an SMMU\n", type); + return false; + } +} + static const struct iommu_ops *iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node, u32 streamid)