Commit abec5356 authored by Eric Farman's avatar Eric Farman Committed by Cornelia Huck
Browse files

s390x: Store Additional Status SIGP order 



Add handling for the Store Additional Status at Address order
that exists for the Signal Processor (SIGP) instruction.

Signed-off-by: default avatarEric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: default avatarThomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
parent fcb79802

target-s390x/cpu.h

+1 −0
Original line number Diff line number Diff line
@@ -945,6 +945,7 @@ struct sysib_322 { 
#define SIGP_SET_PREFIX        0x0d

#define SIGP_STORE_STATUS_ADDR 0x0e

#define SIGP_SET_ARCH          0x12

#define SIGP_STORE_ADTL_STATUS 0x17



/* SIGP condition codes */

#define SIGP_CC_ORDER_CODE_ACCEPTED 0

target-s390x/kvm.c

+55 −0
Original line number Diff line number Diff line
@@ -1373,6 +1373,28 @@ static void sigp_stop(void *arg) 
    si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;

}



#define ADTL_SAVE_AREA_SIZE 1024

static int kvm_s390_store_adtl_status(S390CPU *cpu, hwaddr addr)

{

    void *mem;

    hwaddr len = ADTL_SAVE_AREA_SIZE;



    mem = cpu_physical_memory_map(addr, &len, 1);

    if (!mem) {

        return -EFAULT;

    }

    if (len != ADTL_SAVE_AREA_SIZE) {

        cpu_physical_memory_unmap(mem, len, 1, 0);

        return -EFAULT;

    }



    memcpy(mem, &cpu->env.vregs, 512);



    cpu_physical_memory_unmap(mem, len, 1, len);



    return 0;

}



#define KVM_S390_STORE_STATUS_DEF_ADDR offsetof(LowCore, floating_pt_save_area)

#define SAVE_AREA_SIZE 512

static int kvm_s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch)
@@ -1461,6 +1483,36 @@ static void sigp_store_status_at_address(void *arg) 
    si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;

}



static void sigp_store_adtl_status(void *arg)

{

    SigpInfo *si = arg;



    if (!kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) {

        set_sigp_status(si, SIGP_STAT_INVALID_ORDER);

        return;

    }



    /* cpu has to be stopped */

    if (s390_cpu_get_state(si->cpu) != CPU_STATE_STOPPED) {

        set_sigp_status(si, SIGP_STAT_INCORRECT_STATE);

        return;

    }



    /* parameter must be aligned to 1024-byte boundary */

    if (si->param & 0x3ff) {

        set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);

        return;

    }



    cpu_synchronize_state(CPU(si->cpu));



    if (kvm_s390_store_adtl_status(si->cpu, si->param)) {

        set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);

        return;

    }

    si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;

}



static void sigp_restart(void *arg)

{

    SigpInfo *si = arg;
@@ -1578,6 +1630,9 @@ static int handle_sigp_single_dst(S390CPU *dst_cpu, uint8_t order, 
    case SIGP_STORE_STATUS_ADDR:

        run_on_cpu(CPU(dst_cpu), sigp_store_status_at_address, &si);

        break;

    case SIGP_STORE_ADTL_STATUS:

        run_on_cpu(CPU(dst_cpu), sigp_store_adtl_status, &si);

        break;

    case SIGP_SET_PREFIX:

        run_on_cpu(CPU(dst_cpu), sigp_set_prefix, &si);

        break;