Commit a6880d21 authored by David Hildenbrand's avatar David Hildenbrand Committed by Cornelia Huck
Browse files

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: default avatarDavid Hildenbrand <david@redhat.com>
Message-Id: <20170928203708.9376-24-david@redhat.com>
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarCornelia Huck <cohuck@redhat.com>
parent c50105d4

target/s390x/cpu.h

+1 −0
Original line number Diff line number Diff line
@@ -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

target/s390x/sigp.c

+37 −0
Original line number Diff line number Diff line
@@ -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;