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s390x/tcg: implement SIGP SENSE RUNNING STATUS

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Preparation for TCG, for KVM is this is completely handled in the
kernel.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170928203708.9376-20-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 22:36:57 +02:00 committed by Cornelia Huck
parent 3047f8b549
commit d1b468bc88
2 changed files with 27 additions and 0 deletions
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2
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_SENSE_RUNNING 0x15
#define SIGP_STORE_ADTL_STATUS 0x17
/* SIGP condition codes */
@ -600,6 +601,7 @@ struct sysib_322 {
/* SIGP status bits */
#define SIGP_STAT_EQUIPMENT_CHECK 0x80000000UL
#define SIGP_STAT_NOT_RUNNING 0x00000400UL
#define SIGP_STAT_INCORRECT_STATE 0x00000200UL
#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
#define SIGP_STAT_EXT_CALL_PENDING 0x00000080UL

25
target/s390x/sigp.c
View File

@ -234,6 +234,28 @@ static void sigp_set_prefix(CPUState *cs, run_on_cpu_data arg)
si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
}
static void sigp_sense_running(S390CPU *dst_cpu, SigpInfo *si)
{
if (!tcg_enabled()) {
/* handled in KVM */
set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
return;
}
/* sensing without locks is racy, but it's the same for real hw */
if (!s390_has_feat(S390_FEAT_SENSE_RUNNING_STATUS)) {
set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
return;
}
/* If halted (which includes also STOPPED), it is not running */
if (CPU(dst_cpu)->halted) {
si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
} else {
set_sigp_status(si, SIGP_STAT_NOT_RUNNING);
}
}
static int handle_sigp_single_dst(S390CPU *dst_cpu, uint8_t order,
uint64_t param, uint64_t *status_reg)
{
@ -282,6 +304,9 @@ static int handle_sigp_single_dst(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_SENSE_RUNNING:
sigp_sense_running(dst_cpu, &si);
break;
default:
set_sigp_status(&si, SIGP_STAT_INVALID_ORDER);
}