Initial import of abandoned HQEMU version 2.5.2HEADmaster

1 files changed, 832 insertions, 0 deletions

diff --git a/src/target-s390x/ioinst.c b/src/target-s390x/ioinst.c
new file mode 100644
index 0000000..57c2d8b
--- /dev/null
+++ b/src/target-s390x/ioinst.c
@@ -0,0 +1,832 @@
+/*
+ * I/O instructions for S/390
+ *
+ * Copyright 2012, 2015 IBM Corp.
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include <sys/types.h>
+
+#include "cpu.h"
+#include "ioinst.h"
+#include "trace.h"
+#include "hw/s390x/s390-pci-bus.h"
+
+int ioinst_disassemble_sch_ident(uint32_t value, int *m, int *cssid, int *ssid,
+                                 int *schid)
+{
+    if (!IOINST_SCHID_ONE(value)) {
+        return -EINVAL;
+    }
+    if (!IOINST_SCHID_M(value)) {
+        if (IOINST_SCHID_CSSID(value)) {
+            return -EINVAL;
+        }
+        *cssid = 0;
+        *m = 0;
+    } else {
+        *cssid = IOINST_SCHID_CSSID(value);
+        *m = 1;
+    }
+    *ssid = IOINST_SCHID_SSID(value);
+    *schid = IOINST_SCHID_NR(value);
+    return 0;
+}
+
+void ioinst_handle_xsch(S390CPU *cpu, uint64_t reg1)
+{
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    int ret = -ENODEV;
+    int cc;
+
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
+        program_interrupt(&cpu->env, PGM_OPERAND, 2);
+        return;
+    }
+    trace_ioinst_sch_id("xsch", cssid, ssid, schid);
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch && css_subch_visible(sch)) {
+        ret = css_do_xsch(sch);
+    }
+    switch (ret) {
+    case -ENODEV:
+        cc = 3;
+        break;
+    case -EBUSY:
+        cc = 2;
+        break;
+    case 0:
+        cc = 0;
+        break;
+    default:
+        cc = 1;
+        break;
+    }
+    setcc(cpu, cc);
+}
+
+void ioinst_handle_csch(S390CPU *cpu, uint64_t reg1)
+{
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    int ret = -ENODEV;
+    int cc;
+
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
+        program_interrupt(&cpu->env, PGM_OPERAND, 2);
+        return;
+    }
+    trace_ioinst_sch_id("csch", cssid, ssid, schid);
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch && css_subch_visible(sch)) {
+        ret = css_do_csch(sch);
+    }
+    if (ret == -ENODEV) {
+        cc = 3;
+    } else {
+        cc = 0;
+    }
+    setcc(cpu, cc);
+}
+
+void ioinst_handle_hsch(S390CPU *cpu, uint64_t reg1)
+{
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    int ret = -ENODEV;
+    int cc;
+
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
+        program_interrupt(&cpu->env, PGM_OPERAND, 2);
+        return;
+    }
+    trace_ioinst_sch_id("hsch", cssid, ssid, schid);
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch && css_subch_visible(sch)) {
+        ret = css_do_hsch(sch);
+    }
+    switch (ret) {
+    case -ENODEV:
+        cc = 3;
+        break;
+    case -EBUSY:
+        cc = 2;
+        break;
+    case 0:
+        cc = 0;
+        break;
+    default:
+        cc = 1;
+        break;
+    }
+    setcc(cpu, cc);
+}
+
+static int ioinst_schib_valid(SCHIB *schib)
+{
+    if ((be16_to_cpu(schib->pmcw.flags) & PMCW_FLAGS_MASK_INVALID) ||
+        (be32_to_cpu(schib->pmcw.chars) & PMCW_CHARS_MASK_INVALID)) {
+        return 0;
+    }
+    /* Disallow extended measurements for now. */
+    if (be32_to_cpu(schib->pmcw.chars) & PMCW_CHARS_MASK_XMWME) {
+        return 0;
+    }
+    return 1;
+}
+
+void ioinst_handle_msch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
+{
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    SCHIB schib;
+    uint64_t addr;
+    int ret = -ENODEV;
+    int cc;
+    CPUS390XState *env = &cpu->env;
+    uint8_t ar;
+
+    addr = decode_basedisp_s(env, ipb, &ar);
+    if (addr & 3) {
+        program_interrupt(env, PGM_SPECIFICATION, 2);
+        return;
+    }
+    if (s390_cpu_virt_mem_read(cpu, addr, ar, &schib, sizeof(schib))) {
+        return;
+    }
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) ||
+        !ioinst_schib_valid(&schib)) {
+        program_interrupt(env, PGM_OPERAND, 2);
+        return;
+    }
+    trace_ioinst_sch_id("msch", cssid, ssid, schid);
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch && css_subch_visible(sch)) {
+        ret = css_do_msch(sch, &schib);
+    }
+    switch (ret) {
+    case -ENODEV:
+        cc = 3;
+        break;
+    case -EBUSY:
+        cc = 2;
+        break;
+    case 0:
+        cc = 0;
+        break;
+    default:
+        cc = 1;
+        break;
+    }
+    setcc(cpu, cc);
+}
+
+static void copy_orb_from_guest(ORB *dest, const ORB *src)
+{
+    dest->intparm = be32_to_cpu(src->intparm);
+    dest->ctrl0 = be16_to_cpu(src->ctrl0);
+    dest->lpm = src->lpm;
+    dest->ctrl1 = src->ctrl1;
+    dest->cpa = be32_to_cpu(src->cpa);
+}
+
+static int ioinst_orb_valid(ORB *orb)
+{
+    if ((orb->ctrl0 & ORB_CTRL0_MASK_INVALID) ||
+        (orb->ctrl1 & ORB_CTRL1_MASK_INVALID)) {
+        return 0;
+    }
+    if ((orb->cpa & HIGH_ORDER_BIT) != 0) {
+        return 0;
+    }
+    return 1;
+}
+
+void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
+{
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    ORB orig_orb, orb;
+    uint64_t addr;
+    int ret = -ENODEV;
+    int cc;
+    CPUS390XState *env = &cpu->env;
+    uint8_t ar;
+
+    addr = decode_basedisp_s(env, ipb, &ar);
+    if (addr & 3) {
+        program_interrupt(env, PGM_SPECIFICATION, 2);
+        return;
+    }
+    if (s390_cpu_virt_mem_read(cpu, addr, ar, &orig_orb, sizeof(orb))) {
+        return;
+    }
+    copy_orb_from_guest(&orb, &orig_orb);
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) ||
+        !ioinst_orb_valid(&orb)) {
+        program_interrupt(env, PGM_OPERAND, 2);
+        return;
+    }
+    trace_ioinst_sch_id("ssch", cssid, ssid, schid);
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch && css_subch_visible(sch)) {
+        ret = css_do_ssch(sch, &orb);
+    }
+    switch (ret) {
+    case -ENODEV:
+        cc = 3;
+        break;
+    case -EBUSY:
+        cc = 2;
+        break;
+    case 0:
+        cc = 0;
+        break;
+    default:
+        cc = 1;
+        break;
+    }
+    setcc(cpu, cc);
+}
+
+void ioinst_handle_stcrw(S390CPU *cpu, uint32_t ipb)
+{
+    CRW crw;
+    uint64_t addr;
+    int cc;
+    CPUS390XState *env = &cpu->env;
+    uint8_t ar;
+
+    addr = decode_basedisp_s(env, ipb, &ar);
+    if (addr & 3) {
+        program_interrupt(env, PGM_SPECIFICATION, 2);
+        return;
+    }
+
+    cc = css_do_stcrw(&crw);
+    /* 0 - crw stored, 1 - zeroes stored */
+
+    if (s390_cpu_virt_mem_write(cpu, addr, ar, &crw, sizeof(crw)) == 0) {
+        setcc(cpu, cc);
+    } else if (cc == 0) {
+        /* Write failed: requeue CRW since STCRW is a suppressing instruction */
+        css_undo_stcrw(&crw);
+    }
+}
+
+void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
+{
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    uint64_t addr;
+    int cc;
+    SCHIB schib;
+    CPUS390XState *env = &cpu->env;
+    uint8_t ar;
+
+    addr = decode_basedisp_s(env, ipb, &ar);
+    if (addr & 3) {
+        program_interrupt(env, PGM_SPECIFICATION, 2);
+        return;
+    }
+
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
+        /*
+         * As operand exceptions have a lower priority than access exceptions,
+         * we check whether the memory area is writeable (injecting the
+         * access execption if it is not) first.
+         */
+        if (!s390_cpu_virt_mem_check_write(cpu, addr, ar, sizeof(schib))) {
+            program_interrupt(env, PGM_OPERAND, 2);
+        }
+        return;
+    }
+    trace_ioinst_sch_id("stsch", cssid, ssid, schid);
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch) {
+        if (css_subch_visible(sch)) {
+            css_do_stsch(sch, &schib);
+            cc = 0;
+        } else {
+            /* Indicate no more subchannels in this css/ss */
+            cc = 3;
+        }
+    } else {
+        if (css_schid_final(m, cssid, ssid, schid)) {
+            cc = 3; /* No more subchannels in this css/ss */
+        } else {
+            /* Store an empty schib. */
+            memset(&schib, 0, sizeof(schib));
+            cc = 0;
+        }
+    }
+    if (cc != 3) {
+        if (s390_cpu_virt_mem_write(cpu, addr, ar, &schib,
+                                    sizeof(schib)) != 0) {
+            return;
+        }
+    } else {
+        /* Access exceptions have a higher priority than cc3 */
+        if (s390_cpu_virt_mem_check_write(cpu, addr, ar, sizeof(schib)) != 0) {
+            return;
+        }
+    }
+    setcc(cpu, cc);
+}
+
+int ioinst_handle_tsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
+{
+    CPUS390XState *env = &cpu->env;
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    IRB irb;
+    uint64_t addr;
+    int cc, irb_len;
+    uint8_t ar;
+
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
+        program_interrupt(env, PGM_OPERAND, 2);
+        return -EIO;
+    }
+    trace_ioinst_sch_id("tsch", cssid, ssid, schid);
+    addr = decode_basedisp_s(env, ipb, &ar);
+    if (addr & 3) {
+        program_interrupt(env, PGM_SPECIFICATION, 2);
+        return -EIO;
+    }
+
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch && css_subch_visible(sch)) {
+        cc = css_do_tsch_get_irb(sch, &irb, &irb_len);
+    } else {
+        cc = 3;
+    }
+    /* 0 - status pending, 1 - not status pending, 3 - not operational */
+    if (cc != 3) {
+        if (s390_cpu_virt_mem_write(cpu, addr, ar, &irb, irb_len) != 0) {
+            return -EFAULT;
+        }
+        css_do_tsch_update_subch(sch);
+    } else {
+        irb_len = sizeof(irb) - sizeof(irb.emw);
+        /* Access exceptions have a higher priority than cc3 */
+        if (s390_cpu_virt_mem_check_write(cpu, addr, ar, irb_len) != 0) {
+            return -EFAULT;
+        }
+    }
+
+    setcc(cpu, cc);
+    return 0;
+}
+
+typedef struct ChscReq {
+    uint16_t len;
+    uint16_t command;
+    uint32_t param0;
+    uint32_t param1;
+    uint32_t param2;
+} QEMU_PACKED ChscReq;
+
+typedef struct ChscResp {
+    uint16_t len;
+    uint16_t code;
+    uint32_t param;
+    char data[0];
+} QEMU_PACKED ChscResp;
+
+#define CHSC_MIN_RESP_LEN 0x0008
+
+#define CHSC_SCPD 0x0002
+#define CHSC_SCSC 0x0010
+#define CHSC_SDA  0x0031
+#define CHSC_SEI  0x000e
+
+#define CHSC_SCPD_0_M 0x20000000
+#define CHSC_SCPD_0_C 0x10000000
+#define CHSC_SCPD_0_FMT 0x0f000000
+#define CHSC_SCPD_0_CSSID 0x00ff0000
+#define CHSC_SCPD_0_RFMT 0x00000f00
+#define CHSC_SCPD_0_RES 0xc000f000
+#define CHSC_SCPD_1_RES 0xffffff00
+#define CHSC_SCPD_01_CHPID 0x000000ff
+static void ioinst_handle_chsc_scpd(ChscReq *req, ChscResp *res)
+{
+    uint16_t len = be16_to_cpu(req->len);
+    uint32_t param0 = be32_to_cpu(req->param0);
+    uint32_t param1 = be32_to_cpu(req->param1);
+    uint16_t resp_code;
+    int rfmt;
+    uint16_t cssid;
+    uint8_t f_chpid, l_chpid;
+    int desc_size;
+    int m;
+
+    rfmt = (param0 & CHSC_SCPD_0_RFMT) >> 8;
+    if ((rfmt == 0) ||  (rfmt == 1)) {
+        rfmt = !!(param0 & CHSC_SCPD_0_C);
+    }
+    if ((len != 0x0010) || (param0 & CHSC_SCPD_0_RES) ||
+        (param1 & CHSC_SCPD_1_RES) || req->param2) {
+        resp_code = 0x0003;
+        goto out_err;
+    }
+    if (param0 & CHSC_SCPD_0_FMT) {
+        resp_code = 0x0007;
+        goto out_err;
+    }
+    cssid = (param0 & CHSC_SCPD_0_CSSID) >> 16;
+    m = param0 & CHSC_SCPD_0_M;
+    if (cssid != 0) {
+        if (!m || !css_present(cssid)) {
+            resp_code = 0x0008;
+            goto out_err;
+        }
+    }
+    f_chpid = param0 & CHSC_SCPD_01_CHPID;
+    l_chpid = param1 & CHSC_SCPD_01_CHPID;
+    if (l_chpid < f_chpid) {
+        resp_code = 0x0003;
+        goto out_err;
+    }
+    /* css_collect_chp_desc() is endian-aware */
+    desc_size = css_collect_chp_desc(m, cssid, f_chpid, l_chpid, rfmt,
+                                     &res->data);
+    res->code = cpu_to_be16(0x0001);
+    res->len = cpu_to_be16(8 + desc_size);
+    res->param = cpu_to_be32(rfmt);
+    return;
+
+  out_err:
+    res->code = cpu_to_be16(resp_code);
+    res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
+    res->param = cpu_to_be32(rfmt);
+}
+
+#define CHSC_SCSC_0_M 0x20000000
+#define CHSC_SCSC_0_FMT 0x000f0000
+#define CHSC_SCSC_0_CSSID 0x0000ff00
+#define CHSC_SCSC_0_RES 0xdff000ff
+static void ioinst_handle_chsc_scsc(ChscReq *req, ChscResp *res)
+{
+    uint16_t len = be16_to_cpu(req->len);
+    uint32_t param0 = be32_to_cpu(req->param0);
+    uint8_t cssid;
+    uint16_t resp_code;
+    uint32_t general_chars[510];
+    uint32_t chsc_chars[508];
+
+    if (len != 0x0010) {
+        resp_code = 0x0003;
+        goto out_err;
+    }
+
+    if (param0 & CHSC_SCSC_0_FMT) {
+        resp_code = 0x0007;
+        goto out_err;
+    }
+    cssid = (param0 & CHSC_SCSC_0_CSSID) >> 8;
+    if (cssid != 0) {
+        if (!(param0 & CHSC_SCSC_0_M) || !css_present(cssid)) {
+            resp_code = 0x0008;
+            goto out_err;
+        }
+    }
+    if ((param0 & CHSC_SCSC_0_RES) || req->param1 || req->param2) {
+        resp_code = 0x0003;
+        goto out_err;
+    }
+    res->code = cpu_to_be16(0x0001);
+    res->len = cpu_to_be16(4080);
+    res->param = 0;
+
+    memset(general_chars, 0, sizeof(general_chars));
+    memset(chsc_chars, 0, sizeof(chsc_chars));
+
+    general_chars[0] = cpu_to_be32(0x03000000);
+    general_chars[1] = cpu_to_be32(0x00059000);
+
+    chsc_chars[0] = cpu_to_be32(0x40000000);
+    chsc_chars[3] = cpu_to_be32(0x00040000);
+
+    memcpy(res->data, general_chars, sizeof(general_chars));
+    memcpy(res->data + sizeof(general_chars), chsc_chars, sizeof(chsc_chars));
+    return;
+
+  out_err:
+    res->code = cpu_to_be16(resp_code);
+    res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
+    res->param = 0;
+}
+
+#define CHSC_SDA_0_FMT 0x0f000000
+#define CHSC_SDA_0_OC 0x0000ffff
+#define CHSC_SDA_0_RES 0xf0ff0000
+#define CHSC_SDA_OC_MCSSE 0x0
+#define CHSC_SDA_OC_MSS 0x2
+static void ioinst_handle_chsc_sda(ChscReq *req, ChscResp *res)
+{
+    uint16_t resp_code = 0x0001;
+    uint16_t len = be16_to_cpu(req->len);
+    uint32_t param0 = be32_to_cpu(req->param0);
+    uint16_t oc;
+    int ret;
+
+    if ((len != 0x0400) || (param0 & CHSC_SDA_0_RES)) {
+        resp_code = 0x0003;
+        goto out;
+    }
+
+    if (param0 & CHSC_SDA_0_FMT) {
+        resp_code = 0x0007;
+        goto out;
+    }
+
+    oc = param0 & CHSC_SDA_0_OC;
+    switch (oc) {
+    case CHSC_SDA_OC_MCSSE:
+        ret = css_enable_mcsse();
+        if (ret == -EINVAL) {
+            resp_code = 0x0101;
+            goto out;
+        }
+        break;
+    case CHSC_SDA_OC_MSS:
+        ret = css_enable_mss();
+        if (ret == -EINVAL) {
+            resp_code = 0x0101;
+            goto out;
+        }
+        break;
+    default:
+        resp_code = 0x0003;
+        goto out;
+    }
+
+out:
+    res->code = cpu_to_be16(resp_code);
+    res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
+    res->param = 0;
+}
+
+static int chsc_sei_nt0_get_event(void *res)
+{
+    /* no events yet */
+    return 1;
+}
+
+static int chsc_sei_nt0_have_event(void)
+{
+    /* no events yet */
+    return 0;
+}
+
+#define CHSC_SEI_NT0    (1ULL << 63)
+#define CHSC_SEI_NT2    (1ULL << 61)
+static void ioinst_handle_chsc_sei(ChscReq *req, ChscResp *res)
+{
+    uint64_t selection_mask = ldq_p(&req->param1);
+    uint8_t *res_flags = (uint8_t *)res->data;
+    int have_event = 0;
+    int have_more = 0;
+
+    /* regarding architecture nt0 can not be masked */
+    have_event = !chsc_sei_nt0_get_event(res);
+    have_more = chsc_sei_nt0_have_event();
+
+    if (selection_mask & CHSC_SEI_NT2) {
+        if (!have_event) {
+            have_event = !chsc_sei_nt2_get_event(res);
+        }
+
+        if (!have_more) {
+            have_more = chsc_sei_nt2_have_event();
+        }
+    }
+
+    if (have_event) {
+        res->code = cpu_to_be16(0x0001);
+        if (have_more) {
+            (*res_flags) |= 0x80;
+        } else {
+            (*res_flags) &= ~0x80;
+        }
+    } else {
+        res->code = cpu_to_be16(0x0005);
+        res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
+    }
+}
+
+static void ioinst_handle_chsc_unimplemented(ChscResp *res)
+{
+    res->len = cpu_to_be16(CHSC_MIN_RESP_LEN);
+    res->code = cpu_to_be16(0x0004);
+    res->param = 0;
+}
+
+void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb)
+{
+    ChscReq *req;
+    ChscResp *res;
+    uint64_t addr;
+    int reg;
+    uint16_t len;
+    uint16_t command;
+    CPUS390XState *env = &cpu->env;
+    uint8_t buf[TARGET_PAGE_SIZE];
+
+    trace_ioinst("chsc");
+    reg = (ipb >> 20) & 0x00f;
+    addr = env->regs[reg];
+    /* Page boundary? */
+    if (addr & 0xfff) {
+        program_interrupt(env, PGM_SPECIFICATION, 2);
+        return;
+    }
+    /*
+     * Reading sizeof(ChscReq) bytes is currently enough for all of our
+     * present CHSC sub-handlers ... if we ever need more, we should take
+     * care of req->len here first.
+     */
+    if (s390_cpu_virt_mem_read(cpu, addr, reg, buf, sizeof(ChscReq))) {
+        return;
+    }
+    req = (ChscReq *)buf;
+    len = be16_to_cpu(req->len);
+    /* Length field valid? */
+    if ((len < 16) || (len > 4088) || (len & 7)) {
+        program_interrupt(env, PGM_OPERAND, 2);
+        return;
+    }
+    memset((char *)req + len, 0, TARGET_PAGE_SIZE - len);
+    res = (void *)((char *)req + len);
+    command = be16_to_cpu(req->command);
+    trace_ioinst_chsc_cmd(command, len);
+    switch (command) {
+    case CHSC_SCSC:
+        ioinst_handle_chsc_scsc(req, res);
+        break;
+    case CHSC_SCPD:
+        ioinst_handle_chsc_scpd(req, res);
+        break;
+    case CHSC_SDA:
+        ioinst_handle_chsc_sda(req, res);
+        break;
+    case CHSC_SEI:
+        ioinst_handle_chsc_sei(req, res);
+        break;
+    default:
+        ioinst_handle_chsc_unimplemented(res);
+        break;
+    }
+
+    if (!s390_cpu_virt_mem_write(cpu, addr + len, reg, res,
+                                 be16_to_cpu(res->len))) {
+        setcc(cpu, 0);    /* Command execution complete */
+    }
+}
+
+int ioinst_handle_tpi(S390CPU *cpu, uint32_t ipb)
+{
+    CPUS390XState *env = &cpu->env;
+    uint64_t addr;
+    int lowcore;
+    IOIntCode int_code;
+    hwaddr len;
+    int ret;
+    uint8_t ar;
+
+    trace_ioinst("tpi");
+    addr = decode_basedisp_s(env, ipb, &ar);
+    if (addr & 3) {
+        program_interrupt(env, PGM_SPECIFICATION, 2);
+        return -EIO;
+    }
+
+    lowcore = addr ? 0 : 1;
+    len = lowcore ? 8 /* two words */ : 12 /* three words */;
+    ret = css_do_tpi(&int_code, lowcore);
+    if (ret == 1) {
+        s390_cpu_virt_mem_write(cpu, lowcore ? 184 : addr, ar, &int_code, len);
+    }
+    return ret;
+}
+
+#define SCHM_REG1_RES(_reg) (_reg & 0x000000000ffffffc)
+#define SCHM_REG1_MBK(_reg) ((_reg & 0x00000000f0000000) >> 28)
+#define SCHM_REG1_UPD(_reg) ((_reg & 0x0000000000000002) >> 1)
+#define SCHM_REG1_DCT(_reg) (_reg & 0x0000000000000001)
+
+void ioinst_handle_schm(S390CPU *cpu, uint64_t reg1, uint64_t reg2,
+                        uint32_t ipb)
+{
+    uint8_t mbk;
+    int update;
+    int dct;
+    CPUS390XState *env = &cpu->env;
+
+    trace_ioinst("schm");
+
+    if (SCHM_REG1_RES(reg1)) {
+        program_interrupt(env, PGM_OPERAND, 2);
+        return;
+    }
+
+    mbk = SCHM_REG1_MBK(reg1);
+    update = SCHM_REG1_UPD(reg1);
+    dct = SCHM_REG1_DCT(reg1);
+
+    if (update && (reg2 & 0x000000000000001f)) {
+        program_interrupt(env, PGM_OPERAND, 2);
+        return;
+    }
+
+    css_do_schm(mbk, update, dct, update ? reg2 : 0);
+}
+
+void ioinst_handle_rsch(S390CPU *cpu, uint64_t reg1)
+{
+    int cssid, ssid, schid, m;
+    SubchDev *sch;
+    int ret = -ENODEV;
+    int cc;
+
+    if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
+        program_interrupt(&cpu->env, PGM_OPERAND, 2);
+        return;
+    }
+    trace_ioinst_sch_id("rsch", cssid, ssid, schid);
+    sch = css_find_subch(m, cssid, ssid, schid);
+    if (sch && css_subch_visible(sch)) {
+        ret = css_do_rsch(sch);
+    }
+    switch (ret) {
+    case -ENODEV:
+        cc = 3;
+        break;
+    case -EINVAL:
+        cc = 2;
+        break;
+    case 0:
+        cc = 0;
+        break;
+    default:
+        cc = 1;
+        break;
+    }
+    setcc(cpu, cc);
+}
+
+#define RCHP_REG1_RES(_reg) (_reg & 0x00000000ff00ff00)
+#define RCHP_REG1_CSSID(_reg) ((_reg & 0x0000000000ff0000) >> 16)
+#define RCHP_REG1_CHPID(_reg) (_reg & 0x00000000000000ff)
+void ioinst_handle_rchp(S390CPU *cpu, uint64_t reg1)
+{
+    int cc;
+    uint8_t cssid;
+    uint8_t chpid;
+    int ret;
+    CPUS390XState *env = &cpu->env;
+
+    if (RCHP_REG1_RES(reg1)) {
+        program_interrupt(env, PGM_OPERAND, 2);
+        return;
+    }
+
+    cssid = RCHP_REG1_CSSID(reg1);
+    chpid = RCHP_REG1_CHPID(reg1);
+
+    trace_ioinst_chp_id("rchp", cssid, chpid);
+
+    ret = css_do_rchp(cssid, chpid);
+
+    switch (ret) {
+    case -ENODEV:
+        cc = 3;
+        break;
+    case -EBUSY:
+        cc = 2;
+        break;
+    case 0:
+        cc = 0;
+        break;
+    default:
+        /* Invalid channel subsystem. */
+        program_interrupt(env, PGM_OPERAND, 2);
+        return;
+    }
+    setcc(cpu, cc);
+}
+
+#define SAL_REG1_INVALID(_reg) (_reg & 0x0000000080000000)
+void ioinst_handle_sal(S390CPU *cpu, uint64_t reg1)
+{
+    /* We do not provide address limit checking, so let's suppress it. */
+    if (SAL_REG1_INVALID(reg1) || reg1 & 0x000000000000ffff) {
+        program_interrupt(&cpu->env, PGM_OPERAND, 2);
+    }
+}