bianbu-repo-mirror/bianbu-linux-6.6
1
0
Fork 0
mirror of https://gitee.com/bianbu-linux/linux-6.6 synced 2025-07-06 00:13:38 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

KVM: s390: migrate vcpu interrupt state

Browse source 
This patch adds support to migrate vcpu interrupts. Two new vcpu ioctls
are added which get/set the complete status of pending interrupts in one
go. The ioctls are marked as available with the new capability
KVM_CAP_S390_IRQ_STATE.

We can not use a ONEREG, as the number of pending local interrupts is not
constant and depends on the number of CPUs.

To retrieve the interrupt state we add an ioctl KVM_S390_GET_IRQ_STATE.
Its input parameter is a pointer to a struct kvm_s390_irq_state which
has a buffer and length.  For all currently pending interrupts, we copy
a struct kvm_s390_irq into the buffer and pass it to userspace.

To store interrupt state into a buffer provided by userspace, we add an
ioctl KVM_S390_SET_IRQ_STATE. It passes a struct kvm_s390_irq_state into
the kernel and injects all interrupts contained in the buffer.

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Jens Freimann 2014-11-24 17:13:46 +01:00 • committed by Christian Borntraeger
parent 79e87a103d
commit 816c7667ea
5 changed files with 252 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

11
include/uapi/linux/kvm.h
View file

@ -558,6 +558,13 @@ struct kvm_s390_irq {
} u;
};
struct kvm_s390_irq_state {
__u64 buf;
__u32 flags;
__u32 len;
__u32 reserved[4];
};
/* for KVM_SET_GUEST_DEBUG */
#define KVM_GUESTDBG_ENABLE 0x00000001
@ -803,6 +810,7 @@ struct kvm_ppc_smmu_info {
#define KVM_CAP_S390_USER_STSI 109
#define KVM_CAP_S390_SKEYS 110
#define KVM_CAP_S390_INJECT_IRQ 113
#define KVM_CAP_S390_IRQ_STATE 114
#ifdef KVM_CAP_IRQ_ROUTING
@ -1185,6 +1193,9 @@ struct kvm_s390_ucas_mapping {
#define KVM_S390_SET_SKEYS _IOW(KVMIO, 0xb3, struct kvm_s390_skeys)
/* Available with KVM_CAP_S390_INJECT_IRQ */
#define KVM_S390_IRQ _IOW(KVMIO, 0xb4, struct kvm_s390_irq)
/* Available with KVM_CAP_S390_IRQ_STATE */
#define KVM_S390_SET_IRQ_STATE _IOW(KVMIO, 0xb5, struct kvm_s390_irq_state)
#define KVM_S390_GET_IRQ_STATE _IOW(KVMIO, 0xb6, struct kvm_s390_irq_state)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)