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[S390] cleanup lowcore access from external interrupts

Browse source 
Read external interrupts parameters from the lowcore in the first
level interrupt handler in entry[64].S.

Signed-off-by: Martin Schwidefsky <[email protected]>
This commit is contained in:
Martin Schwidefsky 2010-10-25 16:10:38 +02:00 • committed by Martin Schwidefsky
commit f6649a7e5a
15 changed files with 57 additions and 49 deletions
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19
drivers/s390/block/dasd_diag.c
View file

@ -228,25 +228,22 @@ dasd_diag_term_IO(struct dasd_ccw_req * cqr)
}
/* Handle external interruption. */
static void
dasd_ext_handler(__u16 code)
static void dasd_ext_handler(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
struct dasd_ccw_req *cqr, *next;
struct dasd_device *device;
unsigned long long expires;
unsigned long flags;
u8 int_code, status;
addr_t ip;
int rc;
int_code = *((u8 *) DASD_DIAG_LC_INT_CODE);
status = *((u8 *) DASD_DIAG_LC_INT_STATUS);
switch (int_code) {
switch (ext_int_code >> 24) {
case DASD_DIAG_CODE_31BIT:
ip = (addr_t) *((u32 *) DASD_DIAG_LC_INT_PARM_31BIT);
ip = (addr_t) param32;
break;
case DASD_DIAG_CODE_64BIT:
ip = (addr_t) *((u64 *) DASD_DIAG_LC_INT_PARM_64BIT);
ip = (addr_t) param64;
break;
default:
return;
@ -281,7 +278,7 @@ dasd_ext_handler(__u16 code)
cqr->stopclk = get_clock();
expires = 0;
if (status == 0) {
if ((ext_int_code & 0xff0000) == 0) {
cqr->status = DASD_CQR_SUCCESS;
/* Start first request on queue if possible -> fast_io. */
if (!list_empty(&device->ccw_queue)) {
@ -296,8 +293,8 @@ dasd_ext_handler(__u16 code)
} else {
cqr->status = DASD_CQR_QUEUED;
DBF_DEV_EVENT(DBF_DEBUG, device, "interrupt status for "
"request %p was %d (%d retries left)", cqr, status,
cqr->retries);
"request %p was %d (%d retries left)", cqr,
(ext_int_code >> 16) & 0xff, cqr->retries);
dasd_diag_erp(device);
}

4
drivers/s390/block/dasd_diag.h
View file

@ -18,10 +18,6 @@
#define DEV_CLASS_FBA 0x01
#define DEV_CLASS_ECKD 0x04
#define DASD_DIAG_LC_INT_CODE 132
#define DASD_DIAG_LC_INT_STATUS 133
#define DASD_DIAG_LC_INT_PARM_31BIT 128
#define DASD_DIAG_LC_INT_PARM_64BIT 4536
#define DASD_DIAG_CODE_31BIT 0x03
#define DASD_DIAG_CODE_64BIT 0x07

14
drivers/s390/char/sclp.c
View file

@ -395,16 +395,16 @@ __sclp_find_req(u32 sccb)
/* Handler for external interruption. Perform request post-processing.
* Prepare read event data request if necessary. Start processing of next
* request on queue. */
static void
sclp_interrupt_handler(__u16 code)
static void sclp_interrupt_handler(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
struct sclp_req *req;
u32 finished_sccb;
u32 evbuf_pending;
spin_lock(&sclp_lock);
finished_sccb = S390_lowcore.ext_params & 0xfffffff8;
evbuf_pending = S390_lowcore.ext_params & 0x3;
finished_sccb = param32 & 0xfffffff8;
evbuf_pending = param32 & 0x3;
if (finished_sccb) {
del_timer(&sclp_request_timer);
sclp_running_state = sclp_running_state_reset_pending;
@ -819,12 +819,12 @@ EXPORT_SYMBOL(sclp_reactivate);
/* Handler for external interruption used during initialization. Modify
* request state to done. */
static void
sclp_check_handler(__u16 code)
static void sclp_check_handler(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
u32 finished_sccb;
finished_sccb = S390_lowcore.ext_params & 0xfffffff8;
finished_sccb = param32 & 0xfffffff8;
/* Is this the interrupt we are waiting for? */
if (finished_sccb == 0)
return;

9
drivers/s390/kvm/kvm_virtio.c
View file

@ -372,21 +372,22 @@ static void hotplug_devices(struct work_struct *dummy)
/*
* we emulate the request_irq behaviour on top of s390 extints
*/
static void kvm_extint_handler(u16 code)
static void kvm_extint_handler(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
struct virtqueue *vq;
u16 subcode;
u32 param;
subcode = S390_lowcore.cpu_addr;
subcode = ext_int_code >> 16;
if ((subcode & 0xff00) != VIRTIO_SUBCODE_64)
return;
/* The LSB might be overloaded, we have to mask it */
vq = (struct virtqueue *)(S390_lowcore.ext_params2 & ~1UL);
vq = (struct virtqueue *)(param64 & ~1UL);
/* We use ext_params to decide what this interrupt means */
param = S390_lowcore.ext_params & VIRTIO_PARAM_MASK;
param = param32 & VIRTIO_PARAM_MASK;
switch (param) {
case VIRTIO_PARAM_CONFIG_CHANGED: