s390x/tcg: implement SIGP SENSE RUNNING STATUS
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>
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@ -590,6 +590,7 @@ struct sysib_322 {
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#define SIGP_SET_PREFIX 0x0d
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#define SIGP_STORE_STATUS_ADDR 0x0e
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#define SIGP_SET_ARCH 0x12
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#define SIGP_SENSE_RUNNING 0x15
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#define SIGP_STORE_ADTL_STATUS 0x17
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/* SIGP condition codes */
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@ -600,6 +601,7 @@ struct sysib_322 {
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/* SIGP status bits */
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#define SIGP_STAT_EQUIPMENT_CHECK 0x80000000UL
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#define SIGP_STAT_NOT_RUNNING 0x00000400UL
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#define SIGP_STAT_INCORRECT_STATE 0x00000200UL
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#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
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#define SIGP_STAT_EXT_CALL_PENDING 0x00000080UL
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@ -234,6 +234,28 @@ static void sigp_set_prefix(CPUState *cs, run_on_cpu_data arg)
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si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
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}
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static void sigp_sense_running(S390CPU *dst_cpu, SigpInfo *si)
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{
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if (!tcg_enabled()) {
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/* handled in KVM */
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set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
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return;
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}
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/* sensing without locks is racy, but it's the same for real hw */
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if (!s390_has_feat(S390_FEAT_SENSE_RUNNING_STATUS)) {
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set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
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return;
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}
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/* If halted (which includes also STOPPED), it is not running */
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if (CPU(dst_cpu)->halted) {
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si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
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} else {
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set_sigp_status(si, SIGP_STAT_NOT_RUNNING);
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}
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}
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static int handle_sigp_single_dst(S390CPU *dst_cpu, uint8_t order,
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uint64_t param, uint64_t *status_reg)
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{
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@ -282,6 +304,9 @@ static int handle_sigp_single_dst(S390CPU *dst_cpu, uint8_t order,
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case SIGP_CPU_RESET:
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run_on_cpu(CPU(dst_cpu), sigp_cpu_reset, RUN_ON_CPU_HOST_PTR(&si));
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break;
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case SIGP_SENSE_RUNNING:
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sigp_sense_running(dst_cpu, &si);
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break;
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default:
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set_sigp_status(&si, SIGP_STAT_INVALID_ORDER);
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}
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