From: Paolo Bonzini <[email protected]> Add a new exit-type to KVM for telling user-space that a plane-vcpu is missing. Create a helper which fills out the kvm_run exit structure.
Signed-off-by: Paolo Bonzini <[email protected]> Co-developed-by: Joerg Roedel <[email protected]> Signed-off-by: Joerg Roedel <[email protected]> --- include/linux/kvm_host.h | 2 ++ include/uapi/linux/kvm.h | 10 ++++++++++ virt/kvm/kvm_main.c | 12 ++++++++++++ 3 files changed, 24 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 3ecd472c7cfa..90b97137840e 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1649,6 +1649,8 @@ void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu); void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu); bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu); +int kvm_request_create_plane(struct kvm_vcpu *vcpu, unsigned plane, u64 apic_id); + #ifndef CONFIG_S390 void __kvm_vcpu_kick(struct kvm_vcpu *vcpu, bool wait); diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 24e34b8e4819..a88d987c7882 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -146,6 +146,13 @@ struct kvm_exit_snp_req_certs { __u64 ret; }; +struct kvm_plane_event_exit { +#define KVM_PLANE_EVENT_CREATE_VCPU 1 + __u32 cause; + __u32 plane; + __u64 extra[8]; +}; + #define KVM_S390_GET_SKEYS_NONE 1 #define KVM_S390_SKEYS_MAX 1048576 @@ -193,6 +200,7 @@ struct kvm_exit_snp_req_certs { #define KVM_EXIT_ARM_SEA 41 #define KVM_EXIT_ARM_LDST64B 42 #define KVM_EXIT_SNP_REQ_CERTS 43 +#define KVM_EXIT_PLANE_EVENT 44 /* For KVM_EXIT_INTERNAL_ERROR */ /* Emulate instruction failed. */ @@ -497,6 +505,8 @@ struct kvm_run { } arm_sea; /* KVM_EXIT_SNP_REQ_CERTS */ struct kvm_exit_snp_req_certs snp_req_certs; + /* KVM_EXIT_PLANE_EVENT */ + struct kvm_plane_event_exit plane_event; /* Fix the size of the union. */ char padding[256]; }; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 03a44ff62f0f..f0f78bb74e51 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3973,6 +3973,18 @@ bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu) } EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_vcpu_wake_up); +int kvm_request_create_plane(struct kvm_vcpu *vcpu, unsigned plane, u64 apic_id) +{ + vcpu->run->exit_reason = KVM_EXIT_PLANE_EVENT; + memset(&vcpu->run->plane_event, 0, sizeof(vcpu->run->plane_event)); + vcpu->run->plane_event.cause = KVM_PLANE_EVENT_CREATE_VCPU; + vcpu->run->plane_event.plane = plane; + vcpu->run->plane_event.extra[0] = apic_id; + + return 0; +} +EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_request_create_plane); + #ifndef CONFIG_S390 /* * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode. -- 2.53.0
