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Merge remote-tracking branch 'borntraeger/s390-for-1.6' into staging

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* borntraeger/s390-for-1.6:
  s390: Implement dump-guest-memory support for target s390x
  s390x/kvm: Remove redundant return code
  s390x/kvm: Reworked/fixed handling of cc3 in kvm_handle_css_inst()
  s390x/ioinst: Fixed priority of operand exceptions
  s390x/ioinst: Fixed alignment check in SCHM instruction
  s390x/ioinst: Throw addressing exception when memory_map failed
  s390x/ioinst: Add missing alignment checks for IO instructions
  s390/sclpconsole: handle char layer busy conditions

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2013-07-30 18:48:36 -05:00
parent c9dd6a9fa0 9b4f38e182
commit dbef7b17ad
8 changed files with 283 additions and 91 deletions
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18
hw/char/sclpconsole.c
View file

@ -184,8 +184,6 @@ static int read_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr,
static ssize_t write_console_data(SCLPEvent *event, const uint8_t *buf,
size_t len)
{
ssize_t ret = 0;
const uint8_t *iov_offset;
SCLPConsole *scon = DO_UPCAST(SCLPConsole, event, event);
if (!scon->chr) {
@ -193,21 +191,7 @@ static ssize_t write_console_data(SCLPEvent *event, const uint8_t *buf,
return len;
}
iov_offset = buf;
while (len > 0) {
ret = qemu_chr_fe_write(scon->chr, buf, len);
if (ret == 0) {
/* a pty doesn't seem to be connected - no error */
len = 0;
} else if (ret == -EAGAIN || (ret > 0 && ret < len)) {
len -= ret;
iov_offset += ret;
} else {
len = 0;
}
}
return ret;
return qemu_chr_fe_write_all(scon->chr, buf, len);
}
static int write_event_data(SCLPEvent *event, EventBufferHeader *evt_buf_hdr)

6
include/elf.h
View file

@ -1348,11 +1348,17 @@ typedef struct elf64_shdr {
/* Notes used in ET_CORE */
#define NT_PRSTATUS 1
#define NT_FPREGSET 2
#define NT_PRFPREG 2
#define NT_PRPSINFO 3
#define NT_TASKSTRUCT 4
#define NT_AUXV 6
#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
#define NT_S390_PREFIX 0x305 /* s390 prefix register */
#define NT_S390_CTRS 0x304 /* s390 control registers */
#define NT_S390_TODPREG 0x303 /* s390 TOD programmable register */
#define NT_S390_TODCMP 0x302 /* s390 TOD clock comparator register */
#define NT_S390_TIMER 0x301 /* s390 timer register */
/* Note header in a PT_NOTE section */

2
target-s390x/Makefile.objs
View file

@ -1,5 +1,5 @@
obj-y += translate.o helper.o cpu.o interrupt.o
obj-y += int_helper.o fpu_helper.o cc_helper.o mem_helper.o misc_helper.o
obj-y += gdbstub.o
obj-$(CONFIG_SOFTMMU) += ioinst.o
obj-$(CONFIG_SOFTMMU) += ioinst.o arch_dump.o
obj-$(CONFIG_KVM) += kvm.o

212
target-s390x/arch_dump.c Normal file
View file

@ -0,0 +1,212 @@
/*
* writing ELF notes for s390x arch
*
*
* Copyright IBM Corp. 2012, 2013
*
* Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "cpu.h"
#include "elf.h"
#include "exec/cpu-all.h"
#include "sysemu/dump.h"
#include "sysemu/kvm.h"
struct S390xUserRegsStruct {
uint64_t psw[2];
uint64_t gprs[16];
uint32_t acrs[16];
} QEMU_PACKED;
typedef struct S390xUserRegsStruct S390xUserRegs;
struct S390xElfPrstatusStruct {
uint8_t pad1[32];
uint32_t pid;
uint8_t pad2[76];
S390xUserRegs regs;
uint8_t pad3[16];
} QEMU_PACKED;
typedef struct S390xElfPrstatusStruct S390xElfPrstatus;
struct S390xElfFpregsetStruct {
uint32_t fpc;
uint32_t pad;
uint64_t fprs[16];
} QEMU_PACKED;
typedef struct S390xElfFpregsetStruct S390xElfFpregset;
typedef struct noteStruct {
Elf64_Nhdr hdr;
char name[5];
char pad3[3];
union {
S390xElfPrstatus prstatus;
S390xElfFpregset fpregset;
uint32_t prefix;
uint64_t timer;
uint64_t todcmp;
uint32_t todpreg;
uint64_t ctrs[16];
} contents;
} QEMU_PACKED Note;
static void s390x_write_elf64_prstatus(Note *note, S390CPU *cpu)
{
int i;
S390xUserRegs *regs;
note->hdr.n_type = cpu_to_be32(NT_PRSTATUS);
regs = &(note->contents.prstatus.regs);
regs->psw[0] = cpu_to_be64(cpu->env.psw.mask);
regs->psw[1] = cpu_to_be64(cpu->env.psw.addr);
for (i = 0; i <= 15; i++) {
regs->acrs[i] = cpu_to_be32(cpu->env.aregs[i]);
regs->gprs[i] = cpu_to_be64(cpu->env.regs[i]);
}
}
static void s390x_write_elf64_fpregset(Note *note, S390CPU *cpu)
{
int i;
note->hdr.n_type = cpu_to_be32(NT_FPREGSET);
note->contents.fpregset.fpc = cpu_to_be32(cpu->env.fpc);
for (i = 0; i <= 15; i++) {
note->contents.fpregset.fprs[i] = cpu_to_be64(cpu->env.fregs[i].ll);
}
}
static void s390x_write_elf64_timer(Note *note, S390CPU *cpu)
{
note->hdr.n_type = cpu_to_be32(NT_S390_TIMER);
note->contents.timer = cpu_to_be64((uint64_t)(cpu->env.cputm));
}
static void s390x_write_elf64_todcmp(Note *note, S390CPU *cpu)
{
note->hdr.n_type = cpu_to_be32(NT_S390_TODCMP);
note->contents.todcmp = cpu_to_be64((uint64_t)(cpu->env.ckc));
}
static void s390x_write_elf64_todpreg(Note *note, S390CPU *cpu)
{
note->hdr.n_type = cpu_to_be32(NT_S390_TODPREG);
note->contents.todpreg = cpu_to_be32((uint32_t)(cpu->env.todpr));
}
static void s390x_write_elf64_ctrs(Note *note, S390CPU *cpu)
{
int i;
note->hdr.n_type = cpu_to_be32(NT_S390_CTRS);
for (i = 0; i <= 15; i++) {
note->contents.ctrs[i] = cpu_to_be64(cpu->env.cregs[i]);
}
}
static void s390x_write_elf64_prefix(Note *note, S390CPU *cpu)
{
note->hdr.n_type = cpu_to_be32(NT_S390_PREFIX);
note->contents.prefix = cpu_to_be32((uint32_t)(cpu->env.psa));
}
struct NoteFuncDescStruct {
int contents_size;
void (*note_contents_func)(Note *note, S390CPU *cpu);
} note_func[] = {
{sizeof(((Note *)0)->contents.prstatus), s390x_write_elf64_prstatus},
{sizeof(((Note *)0)->contents.prefix), s390x_write_elf64_prefix},
{sizeof(((Note *)0)->contents.fpregset), s390x_write_elf64_fpregset},
{sizeof(((Note *)0)->contents.ctrs), s390x_write_elf64_ctrs},
{sizeof(((Note *)0)->contents.timer), s390x_write_elf64_timer},
{sizeof(((Note *)0)->contents.todcmp), s390x_write_elf64_todcmp},
{sizeof(((Note *)0)->contents.todpreg), s390x_write_elf64_todpreg},
{ 0, NULL}
};
typedef struct NoteFuncDescStruct NoteFuncDesc;
static int s390x_write_all_elf64_notes(const char *note_name,
WriteCoreDumpFunction f,
S390CPU *cpu, int id,
void *opaque)
{
Note note;
NoteFuncDesc *nf;
int note_size;
int ret = -1;
for (nf = note_func; nf->note_contents_func; nf++) {
note.hdr.n_namesz = cpu_to_be32(sizeof(note.name));
note.hdr.n_descsz = cpu_to_be32(nf->contents_size);
strncpy(note.name, note_name, sizeof(note.name));
(*nf->note_contents_func)(&note, cpu);
note_size = sizeof(note) - sizeof(note.contents) + nf->contents_size;
ret = f(&note, note_size, opaque);
if (ret < 0) {
return -1;
}
}
return 0;
}
int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, void *opaque)
{
S390CPU *cpu = S390_CPU(cs);
return s390x_write_all_elf64_notes("CORE", f, cpu, cpuid, opaque);
}
int cpu_get_dump_info(ArchDumpInfo *info)
{
info->d_machine = EM_S390;
info->d_endian = ELFDATA2MSB;
info->d_class = ELFCLASS64;
return 0;
}
ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
{
int name_size = 8; /* "CORE" or "QEMU" rounded */
size_t elf_note_size = 0;
int note_head_size;
NoteFuncDesc *nf;
assert(class == ELFCLASS64);
assert(machine == EM_S390);
note_head_size = sizeof(Elf64_Nhdr);
for (nf = note_func; nf->note_contents_func; nf++) {
elf_note_size = elf_note_size + note_head_size + name_size +
nf->contents_size;
}
return (elf_note_size) * nr_cpus;
}
int s390_cpu_write_elf64_qemunote(WriteCoreDumpFunction f,
CPUState *cpu, void *opaque)
{
return 0;
}

5
target-s390x/cpu-qom.h
View file

@ -74,6 +74,11 @@ static inline S390CPU *s390_env_get_cpu(CPUS390XState *env)
void s390_cpu_do_interrupt(CPUState *cpu);
void s390_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
int flags);
int s390_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, void *opaque);
int s390_cpu_write_elf64_qemunote(WriteCoreDumpFunction f,
CPUState *cpu, void *opaque);
hwaddr s390_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
int s390_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
int s390_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);

2
target-s390x/cpu.c
View file

@ -178,6 +178,8 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
cc->gdb_write_register = s390_cpu_gdb_write_register;
#ifndef CONFIG_USER_ONLY
cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
cc->write_elf64_note = s390_cpu_write_elf64_note;
cc->write_elf64_qemunote = s390_cpu_write_elf64_qemunote;
#endif
dc->vmsd = &vmstate_s390_cpu;
cc->gdb_num_core_regs = S390_NUM_REGS;

65
target-s390x/ioinst.c
View file

@ -151,23 +151,24 @@ int ioinst_handle_msch(CPUS390XState *env, uint64_t reg1, uint32_t ipb)
int cc;
hwaddr len = sizeof(*schib);
if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
program_interrupt(env, PGM_OPERAND, 2);
addr = decode_basedisp_s(env, ipb);
if (addr & 3) {
program_interrupt(env, PGM_SPECIFICATION, 2);
return -EIO;
}
trace_ioinst_sch_id("msch", cssid, ssid, schid);
addr = decode_basedisp_s(env, ipb);
schib = s390_cpu_physical_memory_map(env, addr, &len, 0);
if (!schib || len != sizeof(*schib)) {
program_interrupt(env, PGM_SPECIFICATION, 2);
program_interrupt(env, PGM_ADDRESSING, 2);
cc = -EIO;
goto out;
}
if (!ioinst_schib_valid(schib)) {
if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) ||
!ioinst_schib_valid(schib)) {
program_interrupt(env, PGM_OPERAND, 2);
cc = -EIO;
goto out;
}
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);
@ -222,24 +223,25 @@ int ioinst_handle_ssch(CPUS390XState *env, uint64_t reg1, uint32_t ipb)
int cc;
hwaddr len = sizeof(*orig_orb);
if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
program_interrupt(env, PGM_OPERAND, 2);
addr = decode_basedisp_s(env, ipb);
if (addr & 3) {
program_interrupt(env, PGM_SPECIFICATION, 2);
return -EIO;
}
trace_ioinst_sch_id("ssch", cssid, ssid, schid);
addr = decode_basedisp_s(env, ipb);
orig_orb = s390_cpu_physical_memory_map(env, addr, &len, 0);
if (!orig_orb || len != sizeof(*orig_orb)) {
program_interrupt(env, PGM_SPECIFICATION, 2);
program_interrupt(env, PGM_ADDRESSING, 2);
cc = -EIO;
goto out;
}
copy_orb_from_guest(&orb, orig_orb);
if (!ioinst_orb_valid(&orb)) {
if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) ||
!ioinst_orb_valid(&orb)) {
program_interrupt(env, PGM_OPERAND, 2);
cc = -EIO;
goto out;
}
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);
@ -272,9 +274,13 @@ int ioinst_handle_stcrw(CPUS390XState *env, uint32_t ipb)
hwaddr len = sizeof(*crw);
addr = decode_basedisp_s(env, ipb);
if (addr & 3) {
program_interrupt(env, PGM_SPECIFICATION, 2);
return -EIO;
}
crw = s390_cpu_physical_memory_map(env, addr, &len, 1);
if (!crw || len != sizeof(*crw)) {
program_interrupt(env, PGM_SPECIFICATION, 2);
program_interrupt(env, PGM_ADDRESSING, 2);
cc = -EIO;
goto out;
}
@ -294,18 +300,24 @@ int ioinst_handle_stsch(CPUS390XState *env, uint64_t reg1, uint32_t ipb)
SCHIB *schib;
hwaddr len = sizeof(*schib);
if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
program_interrupt(env, PGM_OPERAND, 2);
addr = decode_basedisp_s(env, ipb);
if (addr & 3) {
program_interrupt(env, PGM_SPECIFICATION, 2);
return -EIO;
}
trace_ioinst_sch_id("stsch", cssid, ssid, schid);
addr = decode_basedisp_s(env, ipb);
schib = s390_cpu_physical_memory_map(env, addr, &len, 1);
if (!schib || len != sizeof(*schib)) {
program_interrupt(env, PGM_SPECIFICATION, 2);
program_interrupt(env, PGM_ADDRESSING, 2);
cc = -EIO;
goto out;
}
if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) {
program_interrupt(env, PGM_OPERAND, 2);
cc = -EIO;
goto out;
}
trace_ioinst_sch_id("stsch", cssid, ssid, schid);
sch = css_find_subch(m, cssid, ssid, schid);
if (sch) {
if (css_subch_visible(sch)) {
@ -345,9 +357,13 @@ int ioinst_handle_tsch(CPUS390XState *env, uint64_t reg1, uint32_t ipb)
}
trace_ioinst_sch_id("tsch", cssid, ssid, schid);
addr = decode_basedisp_s(env, ipb);
if (addr & 3) {
program_interrupt(env, PGM_SPECIFICATION, 2);
return -EIO;
}
irb = s390_cpu_physical_memory_map(env, addr, &len, 1);
if (!irb || len != sizeof(*irb)) {
program_interrupt(env, PGM_SPECIFICATION, 2);
program_interrupt(env, PGM_ADDRESSING, 2);
cc = -EIO;
goto out;
}
@ -580,7 +596,7 @@ int ioinst_handle_chsc(CPUS390XState *env, uint32_t ipb)
}
req = s390_cpu_physical_memory_map(env, addr, &map_size, 1);
if (!req || map_size != TARGET_PAGE_SIZE) {
program_interrupt(env, PGM_SPECIFICATION, 2);
program_interrupt(env, PGM_ADDRESSING, 2);
ret = -EIO;
goto out;
}
@ -625,12 +641,17 @@ int ioinst_handle_tpi(CPUS390XState *env, uint32_t ipb)
trace_ioinst("tpi");
addr = decode_basedisp_s(env, ipb);
if (addr & 3) {
program_interrupt(env, PGM_SPECIFICATION, 2);
return -EIO;
}
lowcore = addr ? 0 : 1;
len = lowcore ? 8 /* two words */ : 12 /* three words */;
orig_len = len;
int_code = s390_cpu_physical_memory_map(env, addr, &len, 1);
if (!int_code || (len != orig_len)) {
program_interrupt(env, PGM_SPECIFICATION, 2);
program_interrupt(env, PGM_ADDRESSING, 2);
ret = -EIO;
goto out;
}
@ -663,7 +684,7 @@ int ioinst_handle_schm(CPUS390XState *env, uint64_t reg1, uint64_t reg2,
update = SCHM_REG1_UPD(reg1);
dct = SCHM_REG1_DCT(reg1);
if (update && (reg2 & 0x0000000000000fff)) {
if (update && (reg2 & 0x000000000000001f)) {
program_interrupt(env, PGM_OPERAND, 2);
return -EIO;
}

64
target-s390x/kvm.c
View file

@ -528,50 +528,19 @@ static int kvm_handle_css_inst(S390CPU *cpu, struct kvm_run *run,
no_cc = 1;
r = ioinst_handle_sal(env, env->regs[1]);
break;
case PRIV_SIGA:
/* Not provided, set CC = 3 for subchannel not operational */
r = 3;
break;
default:
r = -1;
break;
return -1;
}
if (r >= 0) {
if (!no_cc) {
setcc(cpu, r);
}
r = 0;
} else if (r < -1) {
r = 0;
}
return r;
}
static int is_ioinst(uint8_t ipa0, uint8_t ipa1, uint8_t ipb)
{
int ret = 0;
uint16_t ipa = (ipa0 << 8) | ipa1;
switch (ipa) {
case IPA0_B2 | PRIV_CSCH:
case IPA0_B2 | PRIV_HSCH:
case IPA0_B2 | PRIV_MSCH:
case IPA0_B2 | PRIV_SSCH:
case IPA0_B2 | PRIV_STSCH:
case IPA0_B2 | PRIV_TPI:
case IPA0_B2 | PRIV_SAL:
case IPA0_B2 | PRIV_RSCH:
case IPA0_B2 | PRIV_STCRW:
case IPA0_B2 | PRIV_STCPS:
case IPA0_B2 | PRIV_RCHP:
case IPA0_B2 | PRIV_SCHM:
case IPA0_B2 | PRIV_CHSC:
case IPA0_B2 | PRIV_SIGA:
case IPA0_B2 | PRIV_XSCH:
case IPA0_B9 | PRIV_EQBS:
case IPA0_EB | PRIV_SQBS:
ret = 1;
break;
if (r >= 0 && !no_cc) {
setcc(cpu, r);
}
return ret;
return 0;
}
static int handle_priv(S390CPU *cpu, struct kvm_run *run,
@ -587,15 +556,9 @@ static int handle_priv(S390CPU *cpu, struct kvm_run *run,
r = kvm_sclp_service_call(cpu, run, ipbh0);
break;
default:
if (is_ioinst(ipa0, ipa1, ipb)) {
r = kvm_handle_css_inst(cpu, run, ipa0, ipa1, ipb);
if (r == -1) {
setcc(cpu, 3);
r = 0;
}
} else {
DPRINTF("KVM: unknown PRIV: 0x%x\n", ipa1);
r = -1;
r = kvm_handle_css_inst(cpu, run, ipa0, ipa1, ipb);
if (r == -1) {
DPRINTF("KVM: unhandled PRIV: 0x%x\n", ipa1);
}
break;
}
@ -730,7 +693,7 @@ out:
return 0;
}
static int handle_instruction(S390CPU *cpu, struct kvm_run *run)
static void handle_instruction(S390CPU *cpu, struct kvm_run *run)
{
unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
@ -756,7 +719,6 @@ static int handle_instruction(S390CPU *cpu, struct kvm_run *run)
if (r < 0) {
enter_pgmcheck(cpu, 0x0001);
}
return 0;
}
static bool is_special_wait_psw(CPUState *cs)
@ -776,7 +738,7 @@ static int handle_intercept(S390CPU *cpu)
(long)cs->kvm_run->psw_addr);
switch (icpt_code) {
case ICPT_INSTRUCTION:
r = handle_instruction(cpu, run);
handle_instruction(cpu, run);
break;
case ICPT_WAITPSW:
/* disabled wait, since enabled wait is handled in kernel */