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authorJoerg Roedel <joerg.roedel@amd.com>2011-09-06 18:46:34 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2011-10-21 14:37:20 +0200
commita1b60c1cd913c5ccfb38c717ba0bd22622425fa7 (patch)
tree74e5c1e847262ba3c42fb3b0396a3e781c168b6e
parent905d66c1e5dc8149e111f04a32bb193f25da1d53 (diff)
iommu/core: Convert iommu_found to iommu_present
With per-bus iommu_ops the iommu_found function needs to work on a bus_type too. This patch adds a bus_type parameter to that function and converts all call-places. The function is also renamed to iommu_present because the function now checks if an iommu is present for a given bus and does not check for a global iommu anymore. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
-rw-r--r--arch/ia64/kvm/kvm-ia64.c3
-rw-r--r--arch/x86/kvm/x86.c3
-rw-r--r--drivers/iommu/iommu.c9
-rw-r--r--include/linux/iommu.h4
-rw-r--r--virt/kvm/iommu.c2
5 files changed, 13 insertions, 8 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 8213efe1998..43f4c92816e 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -33,6 +33,7 @@
#include <linux/uaccess.h>
#include <linux/iommu.h>
#include <linux/intel-iommu.h>
+#include <linux/pci.h>
#include <asm/pgtable.h>
#include <asm/gcc_intrin.h>
@@ -204,7 +205,7 @@ int kvm_dev_ioctl_check_extension(long ext)
r = KVM_COALESCED_MMIO_PAGE_OFFSET;
break;
case KVM_CAP_IOMMU:
- r = iommu_found();
+ r = iommu_present(&pci_bus_type);
break;
default:
r = 0;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 84a28ea45fa..73c6a4268bf 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -44,6 +44,7 @@
#include <linux/perf_event.h>
#include <linux/uaccess.h>
#include <linux/hash.h>
+#include <linux/pci.h>
#include <trace/events/kvm.h>
#define CREATE_TRACE_POINTS
@@ -2095,7 +2096,7 @@ int kvm_dev_ioctl_check_extension(long ext)
r = 0;
break;
case KVM_CAP_IOMMU:
- r = iommu_found();
+ r = iommu_present(&pci_bus_type);
break;
case KVM_CAP_MCE:
r = KVM_MAX_MCE_BANKS;
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 46e1c24f2f4..ad8ce1addb4 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -66,11 +66,14 @@ int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops)
}
EXPORT_SYMBOL_GPL(bus_set_iommu);
-bool iommu_found(void)
+bool iommu_present(struct bus_type *bus)
{
- return iommu_ops != NULL;
+ if (bus->iommu_ops != NULL)
+ return true;
+ else
+ return iommu_ops != NULL;
}
-EXPORT_SYMBOL_GPL(iommu_found);
+EXPORT_SYMBOL_GPL(iommu_present);
struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
{
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index c78d068930b..f56e559442a 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -56,7 +56,7 @@ struct iommu_ops {
extern void register_iommu(struct iommu_ops *ops);
extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
-extern bool iommu_found(void);
+extern bool iommu_present(struct bus_type *bus);
extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
extern void iommu_domain_free(struct iommu_domain *domain);
extern int iommu_attach_device(struct iommu_domain *domain,
@@ -76,7 +76,7 @@ extern int iommu_domain_has_cap(struct iommu_domain *domain,
struct iommu_ops {};
-static inline bool iommu_found(void)
+static inline bool iommu_present(struct bus_type *bus)
{
return false;
}
diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index 20115b1aac6..d149940608d 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -228,7 +228,7 @@ int kvm_iommu_map_guest(struct kvm *kvm)
{
int r;
- if (!iommu_found()) {
+ if (!iommu_present(&pci_bus_type)) {
printk(KERN_ERR "%s: iommu not found\n", __func__);
return -ENODEV;
}