diff options
| author | He, Qing <qing.he@intel.com> | 2007-08-05 10:49:16 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:25 +0200 |
| commit | 6bf9e962d14deb9e460afbbfd83ea2f450325c2d (patch) | |
| tree | 050b2be2fcded255afbb2512ed9c07adbd3f5b0f | |
| parent | c52fb35a8b5dada749d35fbe15ac1f9857b22896 (diff) | |
| download | lwn-6bf9e962d14deb9e460afbbfd83ea2f450325c2d.tar.gz lwn-6bf9e962d14deb9e460afbbfd83ea2f450325c2d.zip | |
KVM: in-kernel IOAPIC save and restore support
This patch adds support for in-kernel ioapic save and restore (to
and from userspace). It uses the same get/set_irqchip ioctl as
in-kernel PIC.
Signed-off-by: Qing He <qing.he@intel.com>
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/irq.h | 2 | ||||
| -rw-r--r-- | drivers/kvm/kvm_main.c | 10 | ||||
| -rw-r--r-- | include/linux/kvm.h | 29 |
3 files changed, 39 insertions, 2 deletions
diff --git a/drivers/kvm/irq.h b/drivers/kvm/irq.h index 4034f6576cd9..30adddcb182d 100644 --- a/drivers/kvm/irq.h +++ b/drivers/kvm/irq.h @@ -61,7 +61,7 @@ int kvm_cpu_get_interrupt(struct kvm_vcpu *v); int kvm_cpu_has_interrupt(struct kvm_vcpu *v); void kvm_pic_update_irq(struct kvm_pic *s); -#define IOAPIC_NUM_PINS 24 +#define IOAPIC_NUM_PINS KVM_IOAPIC_NUM_PINS #define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */ #define IOAPIC_EDGE_TRIG 0 #define IOAPIC_LEVEL_TRIG 1 diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index c270e4afd3fd..61dff55f137e 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -913,6 +913,11 @@ static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) &pic_irqchip(kvm)->pics[1], sizeof(struct kvm_pic_state)); break; + case KVM_IRQCHIP_IOAPIC: + memcpy (&chip->chip.ioapic, + ioapic_irqchip(kvm), + sizeof(struct kvm_ioapic_state)); + break; default: r = -EINVAL; break; @@ -936,6 +941,11 @@ static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) &chip->chip.pic, sizeof(struct kvm_pic_state)); break; + case KVM_IRQCHIP_IOAPIC: + memcpy (ioapic_irqchip(kvm), + &chip->chip.ioapic, + sizeof(struct kvm_ioapic_state)); + break; default: r = -EINVAL; break; diff --git a/include/linux/kvm.h b/include/linux/kvm.h index 6560f11870fd..42d15150d7a3 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -45,7 +45,7 @@ struct kvm_irq_level { __u32 level; }; -/* for KVM_GET_IRQCHIP / KVM_SET_IRQCHIP */ +/* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */ struct kvm_pic_state { __u8 last_irr; /* edge detection */ __u8 irr; /* interrupt request register */ @@ -65,9 +65,35 @@ struct kvm_pic_state { __u8 elcr_mask; }; +#define KVM_IOAPIC_NUM_PINS 24 +struct kvm_ioapic_state { + __u64 base_address; + __u32 ioregsel; + __u32 id; + __u32 irr; + __u32 pad; + union { + __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[KVM_IOAPIC_NUM_PINS]; +}; + enum kvm_irqchip_id { KVM_IRQCHIP_PIC_MASTER = 0, KVM_IRQCHIP_PIC_SLAVE = 1, + KVM_IRQCHIP_IOAPIC = 2, }; struct kvm_irqchip { @@ -76,6 +102,7 @@ struct kvm_irqchip { union { char dummy[512]; /* reserving space */ struct kvm_pic_state pic; + struct kvm_ioapic_state ioapic; } chip; }; |