From: Joerg Roedel <joro@8bytes.org>
To: Joerg Roedel <joro@8bytes.org>
Cc: corbet@lwn.net, tony.luck@intel.com, fenghua.yu@intel.com,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
hpa@zytor.com, x86@kernel.org, linux-doc@vger.kernel.org,
linux-ia64@vger.kernel.org, iommu@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, Thomas.Lendacky@amd.com,
Suravee.Suthikulpanit@amd.com, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH 02/11] iommu: Add helpers to set/get default domain type
Date: Mon, 19 Aug 2019 15:22:47 +0200 [thread overview]
Message-ID: <20190819132256.14436-3-joro@8bytes.org> (raw)
In-Reply-To: <20190819132256.14436-1-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
Add a couple of functions to allow changing the default
domain type from architecture code and a function for iommu
drivers to request whether the default domain is
passthrough.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/iommu.c | 22 ++++++++++++++++++++++
include/linux/iommu.h | 16 ++++++++++++++++
2 files changed, 38 insertions(+)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3361ca5ef769..84acd47936ac 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2211,6 +2211,28 @@ int iommu_request_dma_domain_for_dev(struct device *dev)
return request_default_domain_for_dev(dev, IOMMU_DOMAIN_DMA);
}
+void iommu_set_default_passthrough(bool cmd_line)
+{
+ if (cmd_line)
+ iommu_set_cmd_line_dma_api();
+
+ iommu_def_domain_type = IOMMU_DOMAIN_IDENTITY;
+}
+
+void iommu_set_default_translated(bool cmd_line)
+{
+ if (cmd_line)
+ iommu_set_cmd_line_dma_api();
+
+ iommu_def_domain_type = IOMMU_DOMAIN_DMA;
+}
+
+bool iommu_default_passthrough(void)
+{
+ return iommu_def_domain_type == IOMMU_DOMAIN_IDENTITY;
+}
+EXPORT_SYMBOL_GPL(iommu_default_passthrough);
+
const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
{
const struct iommu_ops *ops = NULL;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index fdc355ccc570..4955498204a9 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -413,6 +413,9 @@ extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
extern int iommu_request_dm_for_dev(struct device *dev);
extern int iommu_request_dma_domain_for_dev(struct device *dev);
+extern void iommu_set_default_passthrough(bool cmd_line);
+extern void iommu_set_default_translated(bool cmd_line);
+extern bool iommu_default_passthrough(void);
extern struct iommu_resv_region *
iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
enum iommu_resv_type type);
@@ -694,6 +697,19 @@ static inline int iommu_request_dma_domain_for_dev(struct device *dev)
return -ENODEV;
}
+static inline void iommu_set_default_passthrough(bool cmd_line)
+{
+}
+
+static inline void iommu_set_default_translated(bool cmd_line)
+{
+}
+
+static inline bool iommu_default_passthrough(void)
+{
+ return true;
+}
+
static inline int iommu_attach_group(struct iommu_domain *domain,
struct iommu_group *group)
{
--
2.16.4
next prev parent reply other threads:[~2019-08-19 13:23 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-19 13:22 [PATCH 00/11 v3] Cleanup IOMMU passthrough setting (and disable IOMMU Passthrough when SME is active) Joerg Roedel
2019-08-19 13:22 ` [PATCH 01/11] iommu: Remember when default domain type was set on kernel command line Joerg Roedel
2019-08-19 13:22 ` Joerg Roedel [this message]
2019-08-19 13:22 ` [PATCH 03/11] iommu: Use Functions to set default domain type in iommu_set_def_domain_type() Joerg Roedel
2019-08-19 13:22 ` [PATCH 04/11] iommu/amd: Request passthrough mode from IOMMU core Joerg Roedel
2019-08-19 13:22 ` [PATCH 05/11] iommu/vt-d: " Joerg Roedel
2019-08-19 13:22 ` [PATCH 06/11] x86/dma: Get rid of iommu_pass_through Joerg Roedel
2019-08-20 11:17 ` Borislav Petkov
2019-08-19 13:22 ` [PATCH 07/11] ia64: " Joerg Roedel
2019-08-19 13:22 ` [PATCH 08/11] iommu: Print default domain type on boot Joerg Roedel
2019-08-19 13:22 ` [PATCH 09/11] iommu: Set default domain type at runtime Joerg Roedel
2019-08-19 13:22 ` [PATCH 10/11] iommu: Disable passthrough mode when SME is active Joerg Roedel
2019-08-20 21:18 ` Lendacky, Thomas
2019-08-19 13:22 ` [PATCH 11/11] Documentation: Update Documentation for iommu.passthrough Joerg Roedel
2019-08-23 8:12 ` [PATCH 00/11 v3] Cleanup IOMMU passthrough setting (and disable IOMMU Passthrough when SME is active) Joerg Roedel
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