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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2014-02-21 08:59:59 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-05-16 14:57:28 +0200 |
| commit | 4953919feedaeb6d0161ecea920c35d1d1f639d3 (patch) | |
| tree | f62ccaca28067e90562b6231f0e2dfac55f5a24b /arch/s390/kvm/trace.h | |
| parent | d26b8655f088ac6e972fd8f016b8dfa7cc1b9e5a (diff) | |
| download | linux-4953919feedaeb6d0161ecea920c35d1d1f639d3.tar.bz2 | |
KVM: s390: interpretive execution of SIGP EXTERNAL CALL
If the sigp interpretation facility is installed, most SIGP EXTERNAL CALL
operations will be interpreted instead of intercepted. A partial execution
interception will occurr at the sending cpu only if the target cpu is in the
wait state ("W" bit in the cpuflags set). Instruction interception will only
happen in error cases (e.g. cpu addr invalid).
As a sending cpu might set the external call interrupt pending flags at the
target cpu at every point in time, we can't handle this kind of interrupt using
our kvm interrupt injection mechanism. The injection will be done automatically
by the SIE when preparing the start of the target cpu.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
CC: Thomas Huth <thuth@linux.vnet.ibm.com>
[Adopt external call injection to check for sigp interpretion]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/trace.h')
| -rw-r--r-- | arch/s390/kvm/trace.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/s390/kvm/trace.h b/arch/s390/kvm/trace.h index 579b42afab40..916834d7a73a 100644 --- a/arch/s390/kvm/trace.h +++ b/arch/s390/kvm/trace.h @@ -239,6 +239,29 @@ TRACE_EVENT(kvm_s390_handle_sigp, __entry->cpu_addr, __entry->parameter) ); +TRACE_EVENT(kvm_s390_handle_sigp_pei, + TP_PROTO(VCPU_PROTO_COMMON, __u8 order_code, __u16 cpu_addr), + TP_ARGS(VCPU_ARGS_COMMON, order_code, cpu_addr), + + TP_STRUCT__entry( + VCPU_FIELD_COMMON + __field(__u8, order_code) + __field(__u16, cpu_addr) + ), + + TP_fast_assign( + VCPU_ASSIGN_COMMON + __entry->order_code = order_code; + __entry->cpu_addr = cpu_addr; + ), + + VCPU_TP_PRINTK("handle sigp pei order %02x (%s), cpu address %04x", + __entry->order_code, + __print_symbolic(__entry->order_code, + sigp_order_codes), + __entry->cpu_addr) + ); + TRACE_EVENT(kvm_s390_handle_diag, TP_PROTO(VCPU_PROTO_COMMON, __u16 code), TP_ARGS(VCPU_ARGS_COMMON, code), |