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qemu-e2k/target-s390x/ioinst.c

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/*
* 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(0x0004);
}
}
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);
}
}
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