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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>
This commit is contained in:
Joerg Roedel 2011-09-06 18:46:34 +02:00
parent 905d66c1e5
commit a1b60c1cd9
5 changed files with 13 additions and 8 deletions
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3
arch/ia64/kvm/kvm-ia64.c
View File

@ -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;

3
arch/x86/kvm/x86.c
View File

@ -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;

9
drivers/iommu/iommu.c
View File

@ -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)
{

4
include/linux/iommu.h
View File

@ -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;
}

2
virt/kvm/iommu.c
View File

@ -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;
}