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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>
This commit is contained in:
David Hildenbrand 2017-09-28 22:37:01 +02:00 committed by Cornelia Huck
parent c50105d47c
commit a6880d213b
2 changed files with 38 additions and 0 deletions
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1
target/s390x/cpu.h
View File

@ -590,6 +590,7 @@ struct sysib_322 {
#define SIGP_SET_PREFIX 0x0d
#define SIGP_STORE_STATUS_ADDR 0x0e
#define SIGP_SET_ARCH 0x12
#define SIGP_COND_EMERGENCY 0x13
#define SIGP_SENSE_RUNNING 0x15
#define SIGP_STORE_ADTL_STATUS 0x17

37
target/s390x/sigp.c
View File

@ -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;