summaryrefslogtreecommitdiffstats
path: root/virt/kvm
diff options
context:
space:
mode:
Diffstat (limited to 'virt/kvm')
-rw-r--r--virt/kvm/iommu.c (renamed from virt/kvm/vtd.c)135
-rw-r--r--virt/kvm/kvm_main.c50
2 files changed, 128 insertions, 57 deletions
diff --git a/virt/kvm/vtd.c b/virt/kvm/iommu.c
index a770874f3a3a..e9693a29d00e 100644
--- a/virt/kvm/vtd.c
+++ b/virt/kvm/iommu.c
@@ -25,6 +25,7 @@
#include <linux/kvm_host.h>
#include <linux/pci.h>
#include <linux/dmar.h>
+#include <linux/iommu.h>
#include <linux/intel-iommu.h>
static int kvm_iommu_unmap_memslots(struct kvm *kvm);
@@ -37,7 +38,7 @@ int kvm_iommu_map_pages(struct kvm *kvm,
gfn_t gfn = base_gfn;
pfn_t pfn;
int i, r = 0;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
/* check if iommu exists and in use */
if (!domain)
@@ -45,20 +46,17 @@ int kvm_iommu_map_pages(struct kvm *kvm,
for (i = 0; i < npages; i++) {
/* check if already mapped */
- pfn = (pfn_t)intel_iommu_iova_to_pfn(domain,
- gfn_to_gpa(gfn));
- if (pfn)
+ if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn)))
continue;
pfn = gfn_to_pfn(kvm, gfn);
- r = intel_iommu_page_mapping(domain,
- gfn_to_gpa(gfn),
- pfn_to_hpa(pfn),
- PAGE_SIZE,
- DMA_PTE_READ |
- DMA_PTE_WRITE);
+ r = iommu_map_range(domain,
+ gfn_to_gpa(gfn),
+ pfn_to_hpa(pfn),
+ PAGE_SIZE,
+ IOMMU_READ | IOMMU_WRITE);
if (r) {
- printk(KERN_ERR "kvm_iommu_map_pages:"
+ printk(KERN_ERR "kvm_iommu_map_address:"
"iommu failed to map pfn=%lx\n", pfn);
goto unmap_pages;
}
@@ -73,7 +71,7 @@ unmap_pages:
static int kvm_iommu_map_memslots(struct kvm *kvm)
{
- int i, r;
+ int i, r = 0;
down_read(&kvm->slots_lock);
for (i = 0; i < kvm->nmemslots; i++) {
@@ -86,50 +84,79 @@ static int kvm_iommu_map_memslots(struct kvm *kvm)
return r;
}
-int kvm_iommu_map_guest(struct kvm *kvm,
- struct kvm_assigned_dev_kernel *assigned_dev)
+int kvm_assign_device(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *assigned_dev)
{
struct pci_dev *pdev = NULL;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
int r;
- if (!intel_iommu_found()) {
- printk(KERN_ERR "%s: intel iommu not found\n", __func__);
+ /* check if iommu exists and in use */
+ if (!domain)
+ return 0;
+
+ pdev = assigned_dev->dev;
+ if (pdev == NULL)
return -ENODEV;
+
+ r = iommu_attach_device(domain, &pdev->dev);
+ if (r) {
+ printk(KERN_ERR "assign device %x:%x.%x failed",
+ pdev->bus->number,
+ PCI_SLOT(pdev->devfn),
+ PCI_FUNC(pdev->devfn));
+ return r;
}
- printk(KERN_DEBUG "VT-d direct map: host bdf = %x:%x:%x\n",
- assigned_dev->host_busnr,
- PCI_SLOT(assigned_dev->host_devfn),
- PCI_FUNC(assigned_dev->host_devfn));
+ printk(KERN_DEBUG "assign device: host bdf = %x:%x:%x\n",
+ assigned_dev->host_busnr,
+ PCI_SLOT(assigned_dev->host_devfn),
+ PCI_FUNC(assigned_dev->host_devfn));
+
+ return 0;
+}
+
+int kvm_deassign_device(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *assigned_dev)
+{
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
+ struct pci_dev *pdev = NULL;
+
+ /* check if iommu exists and in use */
+ if (!domain)
+ return 0;
pdev = assigned_dev->dev;
+ if (pdev == NULL)
+ return -ENODEV;
- if (pdev == NULL) {
- if (kvm->arch.intel_iommu_domain) {
- intel_iommu_domain_exit(kvm->arch.intel_iommu_domain);
- kvm->arch.intel_iommu_domain = NULL;
- }
+ iommu_detach_device(domain, &pdev->dev);
+
+ printk(KERN_DEBUG "deassign device: host bdf = %x:%x:%x\n",
+ assigned_dev->host_busnr,
+ PCI_SLOT(assigned_dev->host_devfn),
+ PCI_FUNC(assigned_dev->host_devfn));
+
+ return 0;
+}
+
+int kvm_iommu_map_guest(struct kvm *kvm)
+{
+ int r;
+
+ if (!iommu_found()) {
+ printk(KERN_ERR "%s: iommu not found\n", __func__);
return -ENODEV;
}
- kvm->arch.intel_iommu_domain = intel_iommu_domain_alloc(pdev);
- if (!kvm->arch.intel_iommu_domain)
- return -ENODEV;
+ kvm->arch.iommu_domain = iommu_domain_alloc();
+ if (!kvm->arch.iommu_domain)
+ return -ENOMEM;
r = kvm_iommu_map_memslots(kvm);
if (r)
goto out_unmap;
- intel_iommu_detach_dev(kvm->arch.intel_iommu_domain,
- pdev->bus->number, pdev->devfn);
-
- r = intel_iommu_context_mapping(kvm->arch.intel_iommu_domain,
- pdev);
- if (r) {
- printk(KERN_ERR "Domain context map for %s failed",
- pci_name(pdev));
- goto out_unmap;
- }
return 0;
out_unmap:
@@ -138,19 +165,26 @@ out_unmap:
}
static void kvm_iommu_put_pages(struct kvm *kvm,
- gfn_t base_gfn, unsigned long npages)
+ gfn_t base_gfn, unsigned long npages)
{
gfn_t gfn = base_gfn;
pfn_t pfn;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
- int i;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
+ unsigned long i;
+ u64 phys;
+
+ /* check if iommu exists and in use */
+ if (!domain)
+ return;
for (i = 0; i < npages; i++) {
- pfn = (pfn_t)intel_iommu_iova_to_pfn(domain,
- gfn_to_gpa(gfn));
+ phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
+ pfn = phys >> PAGE_SHIFT;
kvm_release_pfn_clean(pfn);
gfn++;
}
+
+ iommu_unmap_range(domain, gfn_to_gpa(base_gfn), PAGE_SIZE * npages);
}
static int kvm_iommu_unmap_memslots(struct kvm *kvm)
@@ -168,24 +202,13 @@ static int kvm_iommu_unmap_memslots(struct kvm *kvm)
int kvm_iommu_unmap_guest(struct kvm *kvm)
{
- struct kvm_assigned_dev_kernel *entry;
- struct dmar_domain *domain = kvm->arch.intel_iommu_domain;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
/* check if iommu exists and in use */
if (!domain)
return 0;
- list_for_each_entry(entry, &kvm->arch.assigned_dev_head, list) {
- printk(KERN_DEBUG "VT-d unmap: host bdf = %x:%x:%x\n",
- entry->host_busnr,
- PCI_SLOT(entry->host_devfn),
- PCI_FUNC(entry->host_devfn));
-
- /* detach kvm dmar domain */
- intel_iommu_detach_dev(domain, entry->host_busnr,
- entry->host_devfn);
- }
kvm_iommu_unmap_memslots(kvm);
- intel_iommu_domain_exit(domain);
+ iommu_domain_free(domain);
return 0;
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index fc6127cbea1f..3a5a08298aab 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -496,6 +496,7 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
match->assigned_dev_id = assigned_dev->assigned_dev_id;
match->host_busnr = assigned_dev->busnr;
match->host_devfn = assigned_dev->devfn;
+ match->flags = assigned_dev->flags;
match->dev = dev;
match->irq_source_id = -1;
match->kvm = kvm;
@@ -503,7 +504,12 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
list_add(&match->list, &kvm->arch.assigned_dev_head);
if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
- r = kvm_iommu_map_guest(kvm, match);
+ if (!kvm->arch.iommu_domain) {
+ r = kvm_iommu_map_guest(kvm);
+ if (r)
+ goto out_list_del;
+ }
+ r = kvm_assign_device(kvm, match);
if (r)
goto out_list_del;
}
@@ -525,6 +531,35 @@ out_free:
}
#endif
+#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
+static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
+ struct kvm_assigned_pci_dev *assigned_dev)
+{
+ int r = 0;
+ struct kvm_assigned_dev_kernel *match;
+
+ mutex_lock(&kvm->lock);
+
+ match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+ assigned_dev->assigned_dev_id);
+ if (!match) {
+ printk(KERN_INFO "%s: device hasn't been assigned before, "
+ "so cannot be deassigned\n", __func__);
+ r = -EINVAL;
+ goto out;
+ }
+
+ if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
+ kvm_deassign_device(kvm, match);
+
+ kvm_free_assigned_device(kvm, match);
+
+out:
+ mutex_unlock(&kvm->lock);
+ return r;
+}
+#endif
+
static inline int valid_vcpu(int n)
{
return likely(n >= 0 && n < KVM_MAX_VCPUS);
@@ -1858,6 +1893,19 @@ static long kvm_vm_ioctl(struct file *filp,
break;
}
#endif
+#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
+ case KVM_DEASSIGN_PCI_DEVICE: {
+ struct kvm_assigned_pci_dev assigned_dev;
+
+ r = -EFAULT;
+ if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
+ goto out;
+ r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
+ if (r)
+ goto out;
+ break;
+ }
+#endif
default:
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 07:18:52 +0000