diff options
| -rw-r--r-- | arch/s390/kvm/guestdbg.c | 17 | ||||
| -rw-r--r-- | arch/s390/kvm/intercept.c | 17 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 3 |
3 files changed, 34 insertions, 3 deletions
diff --git a/arch/s390/kvm/guestdbg.c b/arch/s390/kvm/guestdbg.c index 1e0849e20965..31a05330d11c 100644 --- a/arch/s390/kvm/guestdbg.c +++ b/arch/s390/kvm/guestdbg.c @@ -439,6 +439,23 @@ exit_required: #define guest_per_enabled(vcpu) \ (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) +int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu) +{ + const u8 ilen = kvm_s390_get_ilen(vcpu); + struct kvm_s390_pgm_info pgm_info = { + .code = PGM_PER, + .per_code = PER_EVENT_IFETCH >> 24, + .per_address = __rewind_psw(vcpu->arch.sie_block->gpsw, ilen), + }; + + /* + * The PSW points to the next instruction, therefore the intercepted + * instruction generated a PER i-fetch event. PER address therefore + * points at the previous PSW address (could be an EXECUTE function). + */ + return kvm_s390_inject_prog_irq(vcpu, &pgm_info); +} + static void filter_guest_per_event(struct kvm_vcpu *vcpu) { u32 perc = vcpu->arch.sie_block->perc << 24; diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 9359f65c8634..850be47c4cc9 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -364,6 +364,8 @@ static int handle_operexc(struct kvm_vcpu *vcpu) int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) { + int rc, per_rc = 0; + if (kvm_is_ucontrol(vcpu->kvm)) return -EOPNOTSUPP; @@ -372,7 +374,8 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) case 0x18: return handle_noop(vcpu); case 0x04: - return handle_instruction(vcpu); + rc = handle_instruction(vcpu); + break; case 0x08: return handle_prog(vcpu); case 0x14: @@ -384,10 +387,18 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) case 0x28: return handle_stop(vcpu); case 0x2c: - return handle_operexc(vcpu); + rc = handle_operexc(vcpu); + break; case 0x38: - return handle_partial_execution(vcpu); + rc = handle_partial_execution(vcpu); + break; default: return -EOPNOTSUPP; } + + /* process PER, also if the instrution is processed in user space */ + if (vcpu->arch.sie_block->icptstatus & 0x02 && + (!rc || rc == -EOPNOTSUPP)) + per_rc = kvm_s390_handle_per_ifetch_icpt(vcpu); + return per_rc ? per_rc : rc; } diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 031f451bb2cf..b8432862a817 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -238,6 +238,8 @@ static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) } static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) { + /* don't inject PER events if we re-execute the instruction */ + vcpu->arch.sie_block->icptstatus &= ~0x02; kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); } @@ -377,6 +379,7 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg); void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); +int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); /* support for Basic/Extended SCA handling */ |