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s390: I/O interrupt and machine check injection. 

I/O interrupts are queued per isc. Only crw pending machine checks
are supported.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Cornelia Huck 2013-01-24 02:28:04 +00:00 committed by Alexander Graf
parent db1c8f53bf
commit 5d69c547d9
2 changed files with 209 additions and 1 deletions
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69
target-s390x/cpu.h
View File

@ -50,6 +50,11 @@
#define MMU_USER_IDX 1
#define MAX_EXT_QUEUE 16
#define MAX_IO_QUEUE 16
#define MAX_MCHK_QUEUE 16
#define PSW_MCHK_MASK 0x0004000000000000
#define PSW_IO_MASK 0x0200000000000000
typedef struct PSW {
uint64_t mask;
@ -62,6 +67,17 @@ typedef struct ExtQueue {
uint32_t param64;
} ExtQueue;
typedef struct IOIntQueue {
uint16_t id;
uint16_t nr;
uint32_t parm;
uint32_t word;
} IOIntQueue;
typedef struct MchkQueue {
uint16_t type;
} MchkQueue;
typedef struct CPUS390XState {
uint64_t regs[16]; /* GP registers */
CPU_DoubleU fregs[16]; /* FP registers */
@ -93,9 +109,17 @@ typedef struct CPUS390XState {
uint64_t cregs[16]; /* control registers */
ExtQueue ext_queue[MAX_EXT_QUEUE];
int pending_int;
IOIntQueue io_queue[MAX_IO_QUEUE][8];
MchkQueue mchk_queue[MAX_MCHK_QUEUE];
int pending_int;
int ext_index;
int io_index[8];
int mchk_index;
uint64_t ckc;
uint64_t cputm;
uint32_t todpr;
CPU_COMMON
@ -375,10 +399,14 @@ void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf);
#define EXCP_EXT 1 /* external interrupt */
#define EXCP_SVC 2 /* supervisor call (syscall) */
#define EXCP_PGM 3 /* program interruption */
#define EXCP_IO 7 /* I/O interrupt */
#define EXCP_MCHK 8 /* machine check */
#define INTERRUPT_EXT (1 << 0)
#define INTERRUPT_TOD (1 << 1)
#define INTERRUPT_CPUTIMER (1 << 2)
#define INTERRUPT_IO (1 << 3)
#define INTERRUPT_MCHK (1 << 4)
/* Program Status Word. */
#define S390_PSWM_REGNUM 0
@ -841,6 +869,45 @@ static inline void cpu_inject_ext(CPUS390XState *env, uint32_t code, uint32_t pa
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
static inline void cpu_inject_io(CPUS390XState *env, uint16_t subchannel_id,
uint16_t subchannel_number,
uint32_t io_int_parm, uint32_t io_int_word)
{
int isc = ffs(io_int_word << 2) - 1;
if (env->io_index[isc] == MAX_IO_QUEUE - 1) {
/* ugh - can't queue anymore. Let's drop. */
return;
}
env->io_index[isc]++;
assert(env->io_index[isc] < MAX_IO_QUEUE);
env->io_queue[env->io_index[isc]][isc].id = subchannel_id;
env->io_queue[env->io_index[isc]][isc].nr = subchannel_number;
env->io_queue[env->io_index[isc]][isc].parm = io_int_parm;
env->io_queue[env->io_index[isc]][isc].word = io_int_word;
env->pending_int |= INTERRUPT_IO;
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
static inline void cpu_inject_crw_mchk(CPUS390XState *env)
{
if (env->mchk_index == MAX_MCHK_QUEUE - 1) {
/* ugh - can't queue anymore. Let's drop. */
return;
}
env->mchk_index++;
assert(env->mchk_index < MAX_MCHK_QUEUE);
env->mchk_queue[env->mchk_index].type = 1;
env->pending_int |= INTERRUPT_MCHK;
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
static inline bool cpu_has_work(CPUState *cpu)
{
CPUS390XState *env = &S390_CPU(cpu)->env;

141
target-s390x/helper.c
View File

@ -614,12 +614,140 @@ static void do_ext_interrupt(CPUS390XState *env)
load_psw(env, mask, addr);
}
static void do_io_interrupt(CPUS390XState *env)
{
uint64_t mask, addr;
LowCore *lowcore;
IOIntQueue *q;
uint8_t isc;
int disable = 1;
int found = 0;
if (!(env->psw.mask & PSW_MASK_IO)) {
cpu_abort(env, "I/O int w/o I/O mask\n");
}
for (isc = 0; isc < ARRAY_SIZE(env->io_index); isc++) {
if (env->io_index[isc] < 0) {
continue;
}
if (env->io_index[isc] > MAX_IO_QUEUE) {
cpu_abort(env, "I/O queue overrun for isc %d: %d\n",
isc, env->io_index[isc]);
}
q = &env->io_queue[env->io_index[isc]][isc];
if (!(env->cregs[6] & q->word)) {
disable = 0;
continue;
}
found = 1;
lowcore = cpu_map_lowcore(env);
lowcore->subchannel_id = cpu_to_be16(q->id);
lowcore->subchannel_nr = cpu_to_be16(q->nr);
lowcore->io_int_parm = cpu_to_be32(q->parm);
lowcore->io_int_word = cpu_to_be32(q->word);
lowcore->io_old_psw.mask = cpu_to_be64(get_psw_mask(env));
lowcore->io_old_psw.addr = cpu_to_be64(env->psw.addr);
mask = be64_to_cpu(lowcore->io_new_psw.mask);
addr = be64_to_cpu(lowcore->io_new_psw.addr);
cpu_unmap_lowcore(lowcore);
env->io_index[isc]--;
if (env->io_index >= 0) {
disable = 0;
}
break;
}
if (disable) {
env->pending_int &= ~INTERRUPT_IO;
}
if (found) {
DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
env->psw.mask, env->psw.addr);
load_psw(env, mask, addr);
}
}
static void do_mchk_interrupt(CPUS390XState *env)
{
uint64_t mask, addr;
LowCore *lowcore;
MchkQueue *q;
int i;
if (!(env->psw.mask & PSW_MASK_MCHECK)) {
cpu_abort(env, "Machine check w/o mchk mask\n");
}
if (env->mchk_index < 0 || env->mchk_index > MAX_MCHK_QUEUE) {
cpu_abort(env, "Mchk queue overrun: %d\n", env->mchk_index);
}
q = &env->mchk_queue[env->mchk_index];
if (q->type != 1) {
/* Don't know how to handle this... */
cpu_abort(env, "Unknown machine check type %d\n", q->type);
}
if (!(env->cregs[14] & (1 << 28))) {
/* CRW machine checks disabled */
return;
}
lowcore = cpu_map_lowcore(env);
for (i = 0; i < 16; i++) {
lowcore->floating_pt_save_area[i] = cpu_to_be64(env->fregs[i].ll);
lowcore->gpregs_save_area[i] = cpu_to_be64(env->regs[i]);
lowcore->access_regs_save_area[i] = cpu_to_be32(env->aregs[i]);
lowcore->cregs_save_area[i] = cpu_to_be64(env->cregs[i]);
}
lowcore->prefixreg_save_area = cpu_to_be32(env->psa);
lowcore->fpt_creg_save_area = cpu_to_be32(env->fpc);
lowcore->tod_progreg_save_area = cpu_to_be32(env->todpr);
lowcore->cpu_timer_save_area[0] = cpu_to_be32(env->cputm >> 32);
lowcore->cpu_timer_save_area[1] = cpu_to_be32((uint32_t)env->cputm);
lowcore->clock_comp_save_area[0] = cpu_to_be32(env->ckc >> 32);
lowcore->clock_comp_save_area[1] = cpu_to_be32((uint32_t)env->ckc);
lowcore->mcck_interruption_code[0] = cpu_to_be32(0x00400f1d);
lowcore->mcck_interruption_code[1] = cpu_to_be32(0x40330000);
lowcore->mcck_old_psw.mask = cpu_to_be64(get_psw_mask(env));
lowcore->mcck_old_psw.addr = cpu_to_be64(env->psw.addr);
mask = be64_to_cpu(lowcore->mcck_new_psw.mask);
addr = be64_to_cpu(lowcore->mcck_new_psw.addr);
cpu_unmap_lowcore(lowcore);
env->mchk_index--;
if (env->mchk_index == -1) {
env->pending_int &= ~INTERRUPT_MCHK;
}
DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
env->psw.mask, env->psw.addr);
load_psw(env, mask, addr);
}
void do_interrupt(CPUS390XState *env)
{
qemu_log_mask(CPU_LOG_INT, "%s: %d at pc=%" PRIx64 "\n",
__func__, env->exception_index, env->psw.addr);
s390_add_running_cpu(env);
/* handle machine checks */
if ((env->psw.mask & PSW_MASK_MCHECK) &&
(env->exception_index == -1)) {
if (env->pending_int & INTERRUPT_MCHK) {
env->exception_index = EXCP_MCHK;
}
}
/* handle external interrupts */
if ((env->psw.mask & PSW_MASK_EXT) &&
env->exception_index == -1) {
@ -638,6 +766,13 @@ void do_interrupt(CPUS390XState *env)
env->pending_int &= ~INTERRUPT_TOD;
}
}
/* handle I/O interrupts */
if ((env->psw.mask & PSW_MASK_IO) &&
(env->exception_index == -1)) {
if (env->pending_int & INTERRUPT_IO) {
env->exception_index = EXCP_IO;
}
}
switch (env->exception_index) {
case EXCP_PGM:
@ -649,6 +784,12 @@ void do_interrupt(CPUS390XState *env)
case EXCP_EXT:
do_ext_interrupt(env);
break;
case EXCP_IO:
do_io_interrupt(env);
break;
case EXCP_MCHK:
do_mchk_interrupt(env);
break;
}
env->exception_index = -1;