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authorSheng Yang <sheng@linux.intel.com>2008-11-24 01:32:55 -0500
committerAvi Kivity <avi@redhat.com>2008-12-31 09:55:02 -0500
commitf64769eb05565c74d7fce6fa75d65924f9cdaf79 (patch)
treee1f0ba42a24d2aa349da7da019fc2c8f516e25bf /virt
parent68b76f51675809c8ce200a86276c3c7266f17a64 (diff)
KVM: Add assigned_device_msi_dispatch()
The function is used to dispatch MSI to lapic according to MSI message address and message data. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2089f8b68a16..228c1d18a614 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -47,6 +47,10 @@
47#include <asm/uaccess.h> 47#include <asm/uaccess.h>
48#include <asm/pgtable.h> 48#include <asm/pgtable.h>
49 49
50#ifdef CONFIG_X86
51#include <asm/msidef.h>
52#endif
53
50#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET 54#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
51#include "coalesced_mmio.h" 55#include "coalesced_mmio.h"
52#endif 56#endif
@@ -78,6 +82,57 @@ static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
78bool kvm_rebooting; 82bool kvm_rebooting;
79 83
80#ifdef KVM_CAP_DEVICE_ASSIGNMENT 84#ifdef KVM_CAP_DEVICE_ASSIGNMENT
85
86#ifdef CONFIG_X86
87static void assigned_device_msi_dispatch(struct kvm_assigned_dev_kernel *dev)
88{
89 int vcpu_id;
90 struct kvm_vcpu *vcpu;
91 struct kvm_ioapic *ioapic = ioapic_irqchip(dev->kvm);
92 int dest_id = (dev->guest_msi.address_lo & MSI_ADDR_DEST_ID_MASK)
93 >> MSI_ADDR_DEST_ID_SHIFT;
94 int vector = (dev->guest_msi.data & MSI_DATA_VECTOR_MASK)
95 >> MSI_DATA_VECTOR_SHIFT;
96 int dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
97 (unsigned long *)&dev->guest_msi.address_lo);
98 int trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
99 (unsigned long *)&dev->guest_msi.data);
100 int delivery_mode = test_bit(MSI_DATA_DELIVERY_MODE_SHIFT,
101 (unsigned long *)&dev->guest_msi.data);
102 u32 deliver_bitmask;
103
104 BUG_ON(!ioapic);
105
106 deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic,
107 dest_id, dest_mode);
108 /* IOAPIC delivery mode value is the same as MSI here */
109 switch (delivery_mode) {
110 case IOAPIC_LOWEST_PRIORITY:
111 vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
112 deliver_bitmask);
113 if (vcpu != NULL)
114 kvm_apic_set_irq(vcpu, vector, trig_mode);
115 else
116 printk(KERN_INFO "kvm: null lowest priority vcpu!\n");
117 break;
118 case IOAPIC_FIXED:
119 for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
120 if (!(deliver_bitmask & (1 << vcpu_id)))
121 continue;
122 deliver_bitmask &= ~(1 << vcpu_id);
123 vcpu = ioapic->kvm->vcpus[vcpu_id];
124 if (vcpu)
125 kvm_apic_set_irq(vcpu, vector, trig_mode);
126 }
127 break;
128 default:
129 printk(KERN_INFO "kvm: unsupported MSI delivery mode\n");
130 }
131}
132#else
133static void assigned_device_msi_dispatch(struct kvm_assigned_dev_kernel *dev) {}
134#endif
135
81static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head, 136static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
82 int assigned_dev_id) 137 int assigned_dev_id)
83{ 138{