GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

KVM: Device Assignment with VT-d

Browse source 
Based on a patch by: Kay, Allen M <allen.m.kay@intel.com>

This patch enables PCI device assignment based on VT-d support.
When a device is assigned to the guest, the guest memory is pinned and
the mapping is updated in the VT-d IOMMU.

[Amit: Expose KVM_CAP_IOMMU so we can check if an IOMMU is present
and also control enable/disable from userspace]

Signed-off-by: Kay, Allen M <allen.m.kay@intel.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Amit Shah <amit.shah@qumranet.com>

Acked-by: Mark Gross <mgross@linux.intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Ben-Ami Yassour 2008-09-14 03:48:28 +03:00 • committed by Avi Kivity
parent 3871794642
commit 62c476c7c7
7 changed files with 281 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

52
include/linux/kvm_host.h
View file

@ -286,6 +286,53 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
struct kvm_irq_ack_notifier {
struct hlist_node link;
unsigned gsi;
void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
};
struct kvm_assigned_dev_kernel {
struct kvm_irq_ack_notifier ack_notifier;
struct work_struct interrupt_work;
struct list_head list;
int assigned_dev_id;
int host_busnr;
int host_devfn;
int host_irq;
int guest_irq;
int irq_requested;
struct pci_dev *dev;
struct kvm *kvm;
};
#ifdef CONFIG_DMAR
int kvm_iommu_map_pages(struct kvm *kvm, gfn_t base_gfn,
unsigned long npages);
int kvm_iommu_map_guest(struct kvm *kvm,
struct kvm_assigned_dev_kernel *assigned_dev);
int kvm_iommu_unmap_guest(struct kvm *kvm);
#else /* CONFIG_DMAR */
static inline int kvm_iommu_map_pages(struct kvm *kvm,
gfn_t base_gfn,
unsigned long npages)
{
return 0;
}
static inline int kvm_iommu_map_guest(struct kvm *kvm,
struct kvm_assigned_dev_kernel
*assigned_dev)
{
return -ENODEV;
}
static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
{
return 0;
}
#endif /* CONFIG_DMAR */
static inline void kvm_guest_enter(void)
{
account_system_vtime(current);
@ -308,6 +355,11 @@ static inline gpa_t gfn_to_gpa(gfn_t gfn)
return (gpa_t)gfn << PAGE_SHIFT;
}
static inline hpa_t pfn_to_hpa(pfn_t pfn)
{
return (hpa_t)pfn << PAGE_SHIFT;
}
static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
{
set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);