diff options
| author | David Hildenbrand <david@redhat.com> | 2017-09-28 22:37:01 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2017-10-20 13:32:10 +0200 |
| commit | a6880d213b371cec59f780ed16a99f0b1e0df88d (patch) | |
| tree | fa3eeb601d2c293cce2b97994dfbf6f8cde3eced /target/s390x/sigp.c | |
| parent | c50105d47c3e13108d4d6d37360c4b105a81ab32 (diff) | |
s390x/tcg: implement SIGP CONDITIONAL EMERGENCY SIGNAL
Mostly analogous to the kernel/KVM version (so I assume the checks are
correct :) ). As a preparation for TCG.
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170928203708.9376-24-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'target/s390x/sigp.c')
| -rw-r--r-- | target/s390x/sigp.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/target/s390x/sigp.c b/target/s390x/sigp.c index d492885787..ce8fda9d01 100644 --- a/target/s390x/sigp.c +++ b/target/s390x/sigp.c @@ -290,6 +290,40 @@ static void sigp_set_prefix(CPUState *cs, run_on_cpu_data arg) si->cc = SIGP_CC_ORDER_CODE_ACCEPTED; } +static void sigp_cond_emergency(S390CPU *src_cpu, S390CPU *dst_cpu, + SigpInfo *si) +{ + const uint64_t psw_int_mask = PSW_MASK_IO | PSW_MASK_EXT; + uint16_t p_asn, s_asn, asn; + uint64_t psw_addr, psw_mask; + bool idle; + + if (!tcg_enabled()) { + /* handled in KVM */ + set_sigp_status(si, SIGP_STAT_INVALID_ORDER); + return; + } + + /* this looks racy, but these values are only used when STOPPED */ + idle = CPU(dst_cpu)->halted; + psw_addr = dst_cpu->env.psw.addr; + psw_mask = dst_cpu->env.psw.mask; + asn = si->param; + p_asn = dst_cpu->env.cregs[4] & 0xffff; /* Primary ASN */ + s_asn = dst_cpu->env.cregs[3] & 0xffff; /* Secondary ASN */ + + if (s390_cpu_get_state(dst_cpu) != CPU_STATE_STOPPED || + (psw_mask & psw_int_mask) != psw_int_mask || + (idle && psw_addr != 0) || + (!idle && (asn == p_asn || asn == s_asn))) { + cpu_inject_emergency_signal(dst_cpu, src_cpu->env.core_id); + } else { + set_sigp_status(si, SIGP_STAT_INCORRECT_STATE); + } + + si->cc = SIGP_CC_ORDER_CODE_ACCEPTED; +} + static void sigp_sense_running(S390CPU *dst_cpu, SigpInfo *si) { if (!tcg_enabled()) { @@ -369,6 +403,9 @@ static int handle_sigp_single_dst(S390CPU *cpu, S390CPU *dst_cpu, uint8_t order, case SIGP_CPU_RESET: run_on_cpu(CPU(dst_cpu), sigp_cpu_reset, RUN_ON_CPU_HOST_PTR(&si)); break; + case SIGP_COND_EMERGENCY: + sigp_cond_emergency(cpu, dst_cpu, &si); + break; case SIGP_SENSE_RUNNING: sigp_sense_running(dst_cpu, &si); break; |