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From: Joerg Roedel <joro@8bytes.org>
To: Joerg Roedel <joro@8bytes.org>
Cc: Thomas.Lendacky@amd.com, Joerg Roedel <jroedel@suse.de>,
	linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	bp@alien8.de
Subject: [PATCH 1/3] iommu: Print default domain type on boot
Date: Fri,  9 Aug 2019 17:22:31 +0200	[thread overview]
Message-ID: <20190809152233.2829-2-joro@8bytes.org> (raw)
In-Reply-To: <20190809152233.2829-1-joro@8bytes.org>

From: Joerg Roedel <jroedel@suse.de>

Introduce a subsys_initcall for IOMMU code and use it to
print the default domain type at boot.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/iommu.c | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 0c674d80c37f..b57ce00c1310 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -80,12 +80,40 @@ struct iommu_group_attribute iommu_group_attr_##_name =		\
 static LIST_HEAD(iommu_device_list);
 static DEFINE_SPINLOCK(iommu_device_lock);
 
+/*
+ * Use a function instead of an array here because the domain-type is a
+ * bit-field, so an array would waste memory.
+ */
+static const char *iommu_domain_type_str(unsigned int t)
+{
+	switch (t) {
+		case IOMMU_DOMAIN_BLOCKED:
+			return "Blocked";
+		case IOMMU_DOMAIN_IDENTITY:
+			return "Passthrough";
+		case IOMMU_DOMAIN_UNMANAGED:
+			return "Unmanaged";
+		case IOMMU_DOMAIN_DMA:
+			return "Translated";
+		default:
+			return "Unknown";
+	}
+}
+
+static int __init iommu_subsys_init(void)
+{
+	pr_info("Default domain type: %s\n",
+		iommu_domain_type_str(iommu_def_domain_type));
+
+	return 0;
+}
+subsys_initcall(iommu_subsys_init);
+
 int iommu_device_register(struct iommu_device *iommu)
 {
 	spin_lock(&iommu_device_lock);
 	list_add_tail(&iommu->list, &iommu_device_list);
 	spin_unlock(&iommu_device_lock);
-
 	return 0;
 }
 
-- 
2.17.1

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	Thomas.Lendacky@amd.com, Suravee.Suthikulpanit@amd.com,
	bp@alien8.de, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH 1/3] iommu: Print default domain type on boot
Date: Fri,  9 Aug 2019 17:22:31 +0200	[thread overview]
Message-ID: <20190809152233.2829-2-joro@8bytes.org> (raw)
In-Reply-To: <20190809152233.2829-1-joro@8bytes.org>

From: Joerg Roedel <jroedel@suse.de>

Introduce a subsys_initcall for IOMMU code and use it to
print the default domain type at boot.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/iommu.c | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 0c674d80c37f..b57ce00c1310 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -80,12 +80,40 @@ struct iommu_group_attribute iommu_group_attr_##_name =		\
 static LIST_HEAD(iommu_device_list);
 static DEFINE_SPINLOCK(iommu_device_lock);
 
+/*
+ * Use a function instead of an array here because the domain-type is a
+ * bit-field, so an array would waste memory.
+ */
+static const char *iommu_domain_type_str(unsigned int t)
+{
+	switch (t) {
+		case IOMMU_DOMAIN_BLOCKED:
+			return "Blocked";
+		case IOMMU_DOMAIN_IDENTITY:
+			return "Passthrough";
+		case IOMMU_DOMAIN_UNMANAGED:
+			return "Unmanaged";
+		case IOMMU_DOMAIN_DMA:
+			return "Translated";
+		default:
+			return "Unknown";
+	}
+}
+
+static int __init iommu_subsys_init(void)
+{
+	pr_info("Default domain type: %s\n",
+		iommu_domain_type_str(iommu_def_domain_type));
+
+	return 0;
+}
+subsys_initcall(iommu_subsys_init);
+
 int iommu_device_register(struct iommu_device *iommu)
 {
 	spin_lock(&iommu_device_lock);
 	list_add_tail(&iommu->list, &iommu_device_list);
 	spin_unlock(&iommu_device_lock);
-
 	return 0;
 }
 
-- 
2.17.1


  reply	other threads:[~2019-08-09 15:22 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-09 15:22 [PATCH 0/3] Disable IOMMU Passthrough when SME is active Joerg Roedel
2019-08-09 15:22 ` Joerg Roedel
2019-08-09 15:22 ` Joerg Roedel [this message]
2019-08-09 15:22   ` [PATCH 1/3] iommu: Print default domain type on boot Joerg Roedel
2019-08-09 15:22 ` [PATCH 2/3] iommu: Set default domain type at runtime Joerg Roedel
2019-08-09 15:22   ` Joerg Roedel
2019-08-09 15:22 ` [PATCH 3/3] iommu: Disable passthrough mode when SME is active Joerg Roedel
2019-08-09 15:22   ` Joerg Roedel
2019-08-09 16:50   ` Lendacky, Thomas
2019-08-09 16:50     ` Lendacky, Thomas
2019-08-09 20:32     ` Joerg Roedel
2019-08-09 20:32       ` Joerg Roedel

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