xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: s390: Add operation exception interception handler

Browse Source 
This commit introduces code that handles operation exception
interceptions. With this handler we can emulate instructions by using
illegal opcodes.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Janosch Frank
2016-05-09 14:14:01 +02:00
committed by Christian Borntraeger
parent 022bd2d11c
commit a011eeb2a3
4 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
arch/s390/kvm/intercept.c
View File

@@ -349,6 +349,15 @@ static int handle_partial_execution(struct kvm_vcpu *vcpu)
return -EOPNOTSUPP;
}
static int handle_operexc(struct kvm_vcpu *vcpu)
{
vcpu->stat.exit_operation_exception++;
trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa,
vcpu->arch.sie_block->ipb);
return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
}
int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
{
if (kvm_is_ucontrol(vcpu->kvm))
@@ -370,6 +379,8 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
return handle_validity(vcpu);
case 0x28:
return handle_stop(vcpu);
case 0x2c:
return handle_operexc(vcpu);
case 0x38:
return handle_partial_execution(vcpu);
default: