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KVM: In-kernel I/O APIC model

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This allows in-kernel host-side device drivers to raise guest interrupts
without going to userspace.

[avi: fix level-triggered interrupt redelivery on eoi]
[avi: add missing #include]
[avi: avoid redelivery of edge-triggered interrupt]
[avi: implement polarity]
[avi: don't deliver edge-triggered interrupts when unmasking]
[avi: fix host oops on invalid guest access]

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Eddie Dong
2007-07-18 12:03:39 +03:00
committed by Avi Kivity
parent 97222cc831
commit 1fd4f2a5ed
6 changed files with 458 additions and 8 deletions
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51
drivers/kvm/irq.h
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@ -60,6 +60,50 @@ int kvm_pic_read_irq(struct kvm_pic *s);
int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
#define IOAPIC_NUM_PINS 24
#define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */
#define IOAPIC_EDGE_TRIG 0
#define IOAPIC_LEVEL_TRIG 1
#define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000
#define IOAPIC_MEM_LENGTH 0x100
/* Direct registers. */
#define IOAPIC_REG_SELECT 0x00
#define IOAPIC_REG_WINDOW 0x10
#define IOAPIC_REG_EOI 0x40 /* IA64 IOSAPIC only */
/* Indirect registers. */
#define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
#define IOAPIC_REG_VERSION 0x01
#define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */
struct kvm_ioapic {
u64 base_address;
u32 ioregsel;
u32 id;
u32 irr;
u32 pad;
union ioapic_redir_entry {
u64 bits;
struct {
u8 vector;
u8 delivery_mode:3;
u8 dest_mode:1;
u8 delivery_status:1;
u8 polarity:1;
u8 remote_irr:1;
u8 trig_mode:1;
u8 mask:1;
u8 reserve:7;
u8 reserved[4];
u8 dest_id;
} fields;
} redirtbl[IOAPIC_NUM_PINS];
struct kvm_io_device dev;
struct kvm *kvm;
};
struct kvm_lapic {
unsigned long base_address;
struct kvm_io_device dev;
@ -96,8 +140,15 @@ void kvm_free_apic(struct kvm_lapic *apic);
u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
struct kvm_lapic *kvm_apic_round_robin(struct kvm *kvm, u8 vector,
unsigned long bitmap);
u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
void kvm_ioapic_update_eoi(struct kvm *kvm, int vector);
int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
int kvm_apic_set_irq(struct kvm_lapic *apic, u8 vec, u8 trig);
int kvm_ioapic_init(struct kvm *kvm);
void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
#endif