From: Robin Murphy <robin.murphy@arm.com>
To: Sricharan R <sricharan@codeaurora.org>,
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: Re: [PATCH V10 05/12] ACPI/IORT: Add function to check SMMUs drivers presence
Date: Tue, 4 Apr 2017 12:04:39 +0100 [thread overview]
Message-ID: <e2713b7b-718d-c059-2e14-cc6ab7636a22@arm.com> (raw)
In-Reply-To: <1491301105-5274-6-git-send-email-sricharan@codeaurora.org>
On 04/04/17 11:18, Sricharan R wrote:
> From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
>
> 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.
Ah, if only DT could be this neat and tidy :D
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
> Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Cc: Sricharan R <sricharan@codeaurora.org>
> ---
> 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)
>
next prev parent reply other threads:[~2017-04-04 11:05 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1489086061-9356-1-git-send-email-sricharan@codeaurora.org>
2017-04-04 10:18 ` [PATCH V10 00/12] IOMMU probe deferral support Sricharan R
2017-04-04 10:18 ` [PATCH V10 01/12] iommu/of: Refactor of_iommu_configure() for error handling Sricharan R
2017-04-04 10:18 ` [PATCH V10 02/12] iommu/of: Prepare for deferred IOMMU configuration Sricharan R
2017-04-04 10:18 ` [PATCH V10 03/12] of: dma: Move range size workaround to of_dma_get_range() Sricharan R
2017-04-04 10:46 ` Robin Murphy
2017-04-06 6:24 ` Frank Rowand
2017-04-06 9:35 ` Sricharan R
2017-04-06 10:03 ` Robin Murphy
2017-04-04 10:18 ` [PATCH V10 04/12] of: dma: Make of_dma_deconfigure() public Sricharan R
2017-04-04 10:47 ` Robin Murphy
2017-04-04 10:18 ` [PATCH V10 05/12] ACPI/IORT: Add function to check SMMUs drivers presence Sricharan R
2017-04-04 11:04 ` Robin Murphy [this message]
2017-04-04 10:18 ` [PATCH V10 06/12] of: device: Fix overflow of coherent_dma_mask Sricharan R
2017-04-04 11:10 ` Robin Murphy
2017-04-06 7:01 ` Frank Rowand
2017-04-06 10:24 ` Robin Murphy
2017-04-06 13:56 ` Rob Herring
2017-04-06 14:45 ` Robin Murphy
2017-04-06 19:24 ` Frank Rowand
2017-04-06 11:01 ` Sricharan R
2017-04-06 19:34 ` Frank Rowand
2017-04-07 4:12 ` Sricharan R
2017-04-07 14:46 ` Robin Murphy
2017-04-07 23:13 ` Frank Rowand
2017-04-10 13:25 ` Robin Murphy
2017-04-07 23:10 ` Frank Rowand
2017-04-04 10:18 ` [PATCH V10 07/12] of/acpi: Configure dma operations at probe time for platform/amba/pci bus devices Sricharan R
2017-04-04 12:17 ` Robin Murphy
2017-04-04 12:30 ` Sricharan R
2017-04-04 10:18 ` [PATCH V10 08/12] iommu: of: Handle IOMMU lookup failure with deferred probing or error Sricharan R
2017-04-04 11:24 ` Robin Murphy
2017-04-04 10:18 ` [PATCH V10 09/12] drivers: acpi: " Sricharan R
2017-04-04 11:31 ` Robin Murphy
2017-04-04 10:18 ` [PATCH V10 10/12] arm64: dma-mapping: Remove the notifier trick to handle early setting of dma_ops Sricharan R
2017-04-04 10:18 ` [PATCH V10 11/12] iommu/arm-smmu: Clean up early-probing workarounds Sricharan R
2017-04-04 10:18 ` [PATCH V10 12/12] ACPI/IORT: Remove linker section for IORT entries probing Sricharan R
2017-04-04 11:33 ` Robin Murphy
2017-04-04 12:49 ` [PATCH V10 00/12] IOMMU probe deferral support Robin Murphy
2017-04-05 10:04 ` Lorenzo Pieralisi
2017-04-05 1:23 ` Rob Herring
2017-04-06 18:46 ` Frank Rowand
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