From 8f2abe6a1e525e878bdf58f68ccd146d543fde84 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 25 Mar 2008 18:47:23 +0100 Subject: KVM: s390: sie intercept handling This path introduces handling of sie intercepts in three flavors: Intercepts are either handled completely in-kernel by kvm_handle_sie_intercept(), or passed to userspace with corresponding data in struct kvm_run in case kvm_handle_sie_intercept() returns -ENOTSUPP. In case of partial execution in kernel with the need of userspace support, kvm_handle_sie_intercept() may choose to set up struct kvm_run and return -EREMOTE. The trivial intercept reasons are handled in this patch: handle_noop() just does nothing for intercepts that don't require our support at all handle_stop() is called when a cpu enters stopped state, and it drops out to userland after updating our vcpu state handle_validity() faults in the cpu lowcore if needed, or passes the request to userland Acked-by: Martin Schwidefsky Signed-off-by: Christian Borntraeger Signed-off-by: Carsten Otte Signed-off-by: Avi Kivity --- arch/s390/kvm/kvm-s390.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/s390/kvm/kvm-s390.h') diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index ed64a22ca86f..5b82527b7f86 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -13,6 +13,13 @@ #ifndef ARCH_S390_KVM_S390_H #define ARCH_S390_KVM_S390_H + +#include + +typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu); + +int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); + #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ do { \ debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ -- cgit v1.2.3