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authorDavid Hildenbrand <david@redhat.com>2017-09-28 22:37:01 +0200
committerCornelia Huck <cohuck@redhat.com>2017-10-20 13:32:10 +0200
commita6880d213b371cec59f780ed16a99f0b1e0df88d (patch)
treefa3eeb601d2c293cce2b97994dfbf6f8cde3eced /target/s390x/sigp.c
parentc50105d47c3e13108d4d6d37360c4b105a81ab32 (diff)
downloadqemu-a6880d213b371cec59f780ed16a99f0b1e0df88d.tar.gz
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.c37
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;