linux-kernel - [PATCH 1/5] iommu: Add domain-attribute handlers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 19 Jan 2012 15:30:01 +0100
From:	Joerg Roedel <joerg.roedel@....com>
To:	<iommu@...ts.linux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>, Ohad Ben-Cohen <ohad@...ery.com>,
	David Woodhouse <dwmw2@...radead.org>,
	David Brown <davidb@...eaurora.org>,
	Tony Lindgren <tony@...mide.com>,
	Hiroshi DOYU <Hiroshi.DOYU@...ia.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Stuart Yoder <b08248@...il.com>,
	Scott Wood <scottwood@...escale.com>,
	Hiroshi Doyu <hdoyu@...dia.com>,
	Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 1/5] iommu: Add domain-attribute handlers

This patch introduces an extension to the iommu-api to get
and set attributes for an iommu_domain. Two functions are
introduced for this:

	* iommu_domain_get_attr()
	* iommu_domain_set_attr()

These functions will be used to make the iommu-api suitable
for GART-like IOMMUs and to implement hardware-specifc
api-extensions.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 drivers/iommu/iommu.c |   20 ++++++++++++++++++++
 include/linux/iommu.h |   25 +++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 2198b2d..ef54718 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -341,3 +341,23 @@ int iommu_device_group(struct device *dev, unsigned int *groupid)
 	return -ENODEV;
 }
 EXPORT_SYMBOL_GPL(iommu_device_group);
+
+int iommu_domain_get_attr(struct iommu_domain *domain,
+			  enum iommu_attr attr, void *data)
+{
+	if (!domain->ops->domain_get_attr)
+		return -EINVAL;
+
+	return domain->ops->domain_get_attr(domain, attr, data);
+}
+EXPORT_SYMBOL_GPL(iommu_domain_get_attr);
+
+int iommu_domain_set_attr(struct iommu_domain *domain,
+			  enum iommu_attr attr, void *data)
+{
+	if (!domain->ops->domain_set_attr)
+		return -EINVAL;
+
+	return domain->ops->domain_set_attr(domain, attr, data);
+}
+EXPORT_SYMBOL_GPL(iommu_domain_set_attr);
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index d937580..32d0de1 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -46,6 +46,10 @@ struct iommu_domain {
 #define IOMMU_CAP_CACHE_COHERENCY	0x1
 #define IOMMU_CAP_INTR_REMAP		0x2	/* isolates device intrs */
 
+enum iommu_attr {
+	DOMAIN_ATTR_MAX,
+};
+
 #ifdef CONFIG_IOMMU_API
 
 /**
@@ -75,6 +79,10 @@ struct iommu_ops {
 	int (*domain_has_cap)(struct iommu_domain *domain,
 			      unsigned long cap);
 	int (*device_group)(struct device *dev, unsigned int *groupid);
+	int (*domain_get_attr)(struct iommu_domain *domain,
+			       enum iommu_attr attr, void *data);
+	int (*domain_set_attr)(struct iommu_domain *domain,
+			       enum iommu_attr attr, void *data);
 	unsigned long pgsize_bitmap;
 };
 
@@ -98,6 +106,11 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain,
 					iommu_fault_handler_t handler);
 extern int iommu_device_group(struct device *dev, unsigned int *groupid);
 
+extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
+				 void *data);
+extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
+				 void *data);
+
 /**
  * report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
  * @domain: the iommu domain where the fault has happened
@@ -200,6 +213,18 @@ static inline int iommu_device_group(struct device *dev, unsigned int *groupid)
 	return -ENODEV;
 }
 
+static inline int iommu_domain_get_attr(struct iommu_domain *domain,
+					enum iommu_attr attr, void *data)
+{
+	return -EINVAL;
+}
+
+static inline int iommu_domain_set_attr(struct iommu_domain *domain,
+					enum iommu_attr attr, void *data)
+{
+	return -EINVAL;
+}
+
 #endif /* CONFIG_IOMMU_API */
 
 #endif /* __LINUX_IOMMU_H */
-- 
1.7.5.4


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/