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KVM: Device Assignment with VT-d

Browse source 
Based on a patch by: Kay, Allen M <[email protected]>

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 <[email protected]>
Signed-off-by: Weidong Han <[email protected]>
Signed-off-by: Ben-Ami Yassour <[email protected]>
Signed-off-by: Amit Shah <[email protected]>

Acked-by: Mark Gross <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
This commit is contained in:
Ben-Ami Yassour 2008-09-14 03:48:28 +03:00 • committed by Avi Kivity
commit 62c476c7c7
7 changed files with 281 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

23
include/asm-x86/kvm_host.h
View file

@ -331,26 +331,6 @@ struct kvm_mem_alias {
gfn_t target_gfn;
};
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;
};
struct kvm_arch{
int naliases;
struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
@ -364,6 +344,7 @@ struct kvm_arch{
*/
struct list_head active_mmu_pages;
struct list_head assigned_dev_head;
struct dmar_domain *intel_iommu_domain;
struct kvm_pic *vpic;
struct kvm_ioapic *vioapic;
struct kvm_pit *vpit;
@ -514,6 +495,8 @@ int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
gpa_t addr, unsigned long *ret);
int is_mmio_pfn(pfn_t pfn);
extern bool tdp_enabled;
enum emulation_result {