From: Thomas Huth <thuth@xxxxxxxxxxxxxxxxxx> Just like the RESTART order, the START order also has to report BUSY while a STOP request is pending, to avoid that the START might be ignored due to a race condition between the STOP and the START order. Signed-off-by: Thomas Huth <thuth@xxxxxxxxxxxxxxxxxx> Reviewed-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx> Signed-off-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx> --- arch/s390/include/asm/sigp.h | 1 + arch/s390/kvm/sigp.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/arch/s390/include/asm/sigp.h b/arch/s390/include/asm/sigp.h index c002cd5..d091aa1 100644 --- a/arch/s390/include/asm/sigp.h +++ b/arch/s390/include/asm/sigp.h @@ -5,6 +5,7 @@ #define SIGP_SENSE 1 #define SIGP_EXTERNAL_CALL 2 #define SIGP_EMERGENCY_SIGNAL 3 +#define SIGP_START 4 #define SIGP_STOP 5 #define SIGP_RESTART 6 #define SIGP_STOP_AND_STORE_STATUS 9 diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c index 509547d..87c2b3a 100644 --- a/arch/s390/kvm/sigp.c +++ b/arch/s390/kvm/sigp.c @@ -455,6 +455,11 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu) rc = __sigp_sense_running(vcpu, cpu_addr, &vcpu->run->s.regs.gprs[r1]); break; + case SIGP_START: + rc = sigp_check_callable(vcpu, cpu_addr); + if (rc == SIGP_CC_ORDER_CODE_ACCEPTED) + rc = -EOPNOTSUPP; /* Handle START in user space */ + break; case SIGP_RESTART: vcpu->stat.instruction_sigp_restart++; rc = sigp_check_callable(vcpu, cpu_addr); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
