aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--hw/s390x/css.c84
-rw-r--r--hw/s390x/s390-ccw.c11
-rw-r--r--hw/vfio/ccw.c28
-rw-r--r--include/hw/s390x/css.h23
-rw-r--r--include/hw/s390x/s390-ccw.h2
-rw-r--r--target/s390x/ioinst.c53
6 files changed, 75 insertions, 126 deletions
diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index 4f964b7691..c87c1aecc0 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -1181,12 +1181,11 @@ static void sch_handle_start_func_virtual(SubchDev *sch)
}
-static int sch_handle_start_func_passthrough(SubchDev *sch)
+static IOInstEnding sch_handle_start_func_passthrough(SubchDev *sch)
{
PMCW *p = &sch->curr_status.pmcw;
SCSW *s = &sch->curr_status.scsw;
- int ret;
ORB *orb = &sch->orb;
if (!(s->ctrl & SCSW_ACTL_SUSP)) {
@@ -1200,31 +1199,12 @@ static int sch_handle_start_func_passthrough(SubchDev *sch)
*/
if (!(orb->ctrl0 & ORB_CTRL0_MASK_PFCH) ||
!(orb->ctrl0 & ORB_CTRL0_MASK_C64)) {
- return -EINVAL;
+ warn_report("vfio-ccw requires PFCH and C64 flags set");
+ sch_gen_unit_exception(sch);
+ css_inject_io_interrupt(sch);
+ return IOINST_CC_EXPECTED;
}
-
- ret = s390_ccw_cmd_request(orb, s, sch->driver_data);
- switch (ret) {
- /* Currently we don't update control block and just return the cc code. */
- case 0:
- break;
- case -EBUSY:
- break;
- case -ENODEV:
- break;
- case -EACCES:
- /* Let's reflect an inaccessible host device by cc 3. */
- ret = -ENODEV;
- break;
- default:
- /*
- * All other return codes will trigger a program check,
- * or set cc to 1.
- */
- break;
- };
-
- return ret;
+ return s390_ccw_cmd_request(sch);
}
/*
@@ -1233,7 +1213,7 @@ static int sch_handle_start_func_passthrough(SubchDev *sch)
* read/writes) asynchronous later on if we start supporting more than
* our current very simple devices.
*/
-int do_subchannel_work_virtual(SubchDev *sch)
+IOInstEnding do_subchannel_work_virtual(SubchDev *sch)
{
SCSW *s = &sch->curr_status.scsw;
@@ -1247,12 +1227,12 @@ int do_subchannel_work_virtual(SubchDev *sch)
sch_handle_start_func_virtual(sch);
}
css_inject_io_interrupt(sch);
- return 0;
+ /* inst must succeed if this func is called */
+ return IOINST_CC_EXPECTED;
}
-int do_subchannel_work_passthrough(SubchDev *sch)
+IOInstEnding do_subchannel_work_passthrough(SubchDev *sch)
{
- int ret = 0;
SCSW *s = &sch->curr_status.scsw;
if (s->ctrl & SCSW_FCTL_CLEAR_FUNC) {
@@ -1262,16 +1242,15 @@ int do_subchannel_work_passthrough(SubchDev *sch)
/* TODO: Halt handling */
sch_handle_halt_func(sch);
} else if (s->ctrl & SCSW_FCTL_START_FUNC) {
- ret = sch_handle_start_func_passthrough(sch);
+ return sch_handle_start_func_passthrough(sch);
}
-
- return ret;
+ return IOINST_CC_EXPECTED;
}
-static int do_subchannel_work(SubchDev *sch)
+static IOInstEnding do_subchannel_work(SubchDev *sch)
{
if (!sch->do_subchannel_work) {
- return -EINVAL;
+ return IOINST_CC_STATUS_PRESENT;
}
g_assert(sch->curr_status.scsw.ctrl & SCSW_CTRL_MASK_FCTL);
return sch->do_subchannel_work(sch);
@@ -1561,27 +1540,23 @@ static void css_update_chnmon(SubchDev *sch)
}
}
-int css_do_ssch(SubchDev *sch, ORB *orb)
+IOInstEnding css_do_ssch(SubchDev *sch, ORB *orb)
{
SCSW *s = &sch->curr_status.scsw;
PMCW *p = &sch->curr_status.pmcw;
- int ret;
if (~(p->flags) & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA)) {
- ret = -ENODEV;
- goto out;
+ return IOINST_CC_NOT_OPERATIONAL;
}
if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
- ret = -EINPROGRESS;
- goto out;
+ return IOINST_CC_STATUS_PRESENT;
}
if (s->ctrl & (SCSW_FCTL_START_FUNC |
SCSW_FCTL_HALT_FUNC |
SCSW_FCTL_CLEAR_FUNC)) {
- ret = -EBUSY;
- goto out;
+ return IOINST_CC_BUSY;
}
/* If monitoring is active, update counter. */
@@ -1594,10 +1569,7 @@ int css_do_ssch(SubchDev *sch, ORB *orb)
s->ctrl |= (SCSW_FCTL_START_FUNC | SCSW_ACTL_START_PEND);
s->flags &= ~SCSW_FLAGS_MASK_PNO;
- ret = do_subchannel_work(sch);
-
-out:
- return ret;
+ return do_subchannel_work(sch);
}
static void copy_irb_to_guest(IRB *dest, const IRB *src, PMCW *pmcw,
@@ -1844,27 +1816,23 @@ void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo)
}
}
-int css_do_rsch(SubchDev *sch)
+IOInstEnding css_do_rsch(SubchDev *sch)
{
SCSW *s = &sch->curr_status.scsw;
PMCW *p = &sch->curr_status.pmcw;
- int ret;
if (~(p->flags) & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA)) {
- ret = -ENODEV;
- goto out;
+ return IOINST_CC_NOT_OPERATIONAL;
}
if (s->ctrl & SCSW_STCTL_STATUS_PEND) {
- ret = -EINPROGRESS;
- goto out;
+ return IOINST_CC_STATUS_PRESENT;
}
if (((s->ctrl & SCSW_CTRL_MASK_FCTL) != SCSW_FCTL_START_FUNC) ||
(s->ctrl & SCSW_ACTL_RESUME_PEND) ||
(!(s->ctrl & SCSW_ACTL_SUSP))) {
- ret = -EINVAL;
- goto out;
+ return IOINST_CC_BUSY;
}
/* If monitoring is active, update counter. */
@@ -1873,11 +1841,7 @@ int css_do_rsch(SubchDev *sch)
}
s->ctrl |= SCSW_ACTL_RESUME_PEND;
- do_subchannel_work(sch);
- ret = 0;
-
-out:
- return ret;
+ return do_subchannel_work(sch);
}
int css_do_rchp(uint8_t cssid, uint8_t chpid)
diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c
index 8614dda6f8..0ef232ec27 100644
--- a/hw/s390x/s390-ccw.c
+++ b/hw/s390x/s390-ccw.c
@@ -18,15 +18,14 @@
#include "hw/s390x/css-bridge.h"
#include "hw/s390x/s390-ccw.h"
-int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data)
+IOInstEnding s390_ccw_cmd_request(SubchDev *sch)
{
- S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(data);
+ S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data);
- if (cdc->handle_request) {
- return cdc->handle_request(orb, scsw, data);
- } else {
- return -ENOSYS;
+ if (!cdc->handle_request) {
+ return IOINST_CC_STATUS_PRESENT;
}
+ return cdc->handle_request(sch);
}
static void s390_ccw_get_dev_info(S390CCWDevice *cdev,
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 76323c6bde..636729c03d 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -47,9 +47,9 @@ struct VFIODeviceOps vfio_ccw_ops = {
.vfio_compute_needs_reset = vfio_ccw_compute_needs_reset,
};
-static int vfio_ccw_handle_request(ORB *orb, SCSW *scsw, void *data)
+static IOInstEnding vfio_ccw_handle_request(SubchDev *sch)
{
- S390CCWDevice *cdev = data;
+ S390CCWDevice *cdev = sch->driver_data;
VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev);
struct ccw_io_region *region = vcdev->io_region;
int ret;
@@ -60,8 +60,8 @@ static int vfio_ccw_handle_request(ORB *orb, SCSW *scsw, void *data)
memset(region, 0, sizeof(*region));
- memcpy(region->orb_area, orb, sizeof(ORB));
- memcpy(region->scsw_area, scsw, sizeof(SCSW));
+ memcpy(region->orb_area, &sch->orb, sizeof(ORB));
+ memcpy(region->scsw_area, &sch->curr_status.scsw, sizeof(SCSW));
again:
ret = pwrite(vcdev->vdev.fd, region,
@@ -71,10 +71,24 @@ again:
goto again;
}
error_report("vfio-ccw: wirte I/O region failed with errno=%d", errno);
- return -errno;
+ ret = -errno;
+ } else {
+ ret = region->ret_code;
+ }
+ switch (ret) {
+ case 0:
+ return IOINST_CC_EXPECTED;
+ case -EBUSY:
+ return IOINST_CC_BUSY;
+ case -ENODEV:
+ case -EACCES:
+ return IOINST_CC_NOT_OPERATIONAL;
+ case -EFAULT:
+ default:
+ sch_gen_unit_exception(sch);
+ css_inject_io_interrupt(sch);
+ return IOINST_CC_EXPECTED;
}
-
- return region->ret_code;
}
static void vfio_ccw_reset(DeviceState *dev)
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h
index 08ad1a14cf..666ce1174b 100644
--- a/include/hw/s390x/css.h
+++ b/include/hw/s390x/css.h
@@ -136,11 +136,22 @@ struct SubchDev {
/* transport-provided data: */
int (*ccw_cb) (SubchDev *, CCW1);
void (*disable_cb)(SubchDev *);
- int (*do_subchannel_work) (SubchDev *);
+ IOInstEnding (*do_subchannel_work) (SubchDev *);
SenseId id;
void *driver_data;
};
+static inline void sch_gen_unit_exception(SubchDev *sch)
+{
+ sch->curr_status.scsw.ctrl &= ~SCSW_ACTL_START_PEND;
+ sch->curr_status.scsw.ctrl |= SCSW_STCTL_PRIMARY |
+ SCSW_STCTL_SECONDARY |
+ SCSW_STCTL_ALERT |
+ SCSW_STCTL_STATUS_PEND;
+ sch->curr_status.scsw.cpa = sch->channel_prog + 8;
+ sch->curr_status.scsw.dstat = SCSW_DSTAT_UNIT_EXCEP;
+}
+
extern const VMStateDescription vmstate_subch_dev;
/*
@@ -199,9 +210,9 @@ void css_generate_sch_crws(uint8_t cssid, uint8_t ssid, uint16_t schid,
void css_generate_chp_crws(uint8_t cssid, uint8_t chpid);
void css_generate_css_crws(uint8_t cssid);
void css_clear_sei_pending(void);
-int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data);
-int do_subchannel_work_virtual(SubchDev *sub);
-int do_subchannel_work_passthrough(SubchDev *sub);
+IOInstEnding s390_ccw_cmd_request(SubchDev *sch);
+IOInstEnding do_subchannel_work_virtual(SubchDev *sub);
+IOInstEnding do_subchannel_work_passthrough(SubchDev *sub);
typedef enum {
CSS_IO_ADAPTER_VIRTIO = 0,
@@ -232,7 +243,7 @@ int css_do_msch(SubchDev *sch, const SCHIB *schib);
int css_do_xsch(SubchDev *sch);
int css_do_csch(SubchDev *sch);
int css_do_hsch(SubchDev *sch);
-int css_do_ssch(SubchDev *sch, ORB *orb);
+IOInstEnding css_do_ssch(SubchDev *sch, ORB *orb);
int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len);
void css_do_tsch_update_subch(SubchDev *sch);
int css_do_stcrw(CRW *crw);
@@ -243,7 +254,7 @@ int css_collect_chp_desc(int m, uint8_t cssid, uint8_t f_chpid, uint8_t l_chpid,
void css_do_schm(uint8_t mbk, int update, int dct, uint64_t mbo);
int css_enable_mcsse(void);
int css_enable_mss(void);
-int css_do_rsch(SubchDev *sch);
+IOInstEnding css_do_rsch(SubchDev *sch);
int css_do_rchp(uint8_t cssid, uint8_t chpid);
bool css_present(uint8_t cssid);
#endif
diff --git a/include/hw/s390x/s390-ccw.h b/include/hw/s390x/s390-ccw.h
index 9f45cf1347..7d15a1a5d4 100644
--- a/include/hw/s390x/s390-ccw.h
+++ b/include/hw/s390x/s390-ccw.h
@@ -33,7 +33,7 @@ typedef struct S390CCWDeviceClass {
CCWDeviceClass parent_class;
void (*realize)(S390CCWDevice *dev, char *sysfsdev, Error **errp);
void (*unrealize)(S390CCWDevice *dev, Error **errp);
- int (*handle_request) (ORB *, SCSW *, void *);
+ IOInstEnding (*handle_request) (SubchDev *sch);
} S390CCWDeviceClass;
#endif
diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c
index 47490f838a..16b5cf2fed 100644
--- a/target/s390x/ioinst.c
+++ b/target/s390x/ioinst.c
@@ -218,8 +218,6 @@ void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
SubchDev *sch;
ORB orig_orb, orb;
uint64_t addr;
- int ret = -ENODEV;
- int cc;
CPUS390XState *env = &cpu->env;
uint8_t ar;
@@ -239,33 +237,11 @@ void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb)
}
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 -EFAULT:
- /*
- * TODO:
- * I'm wondering whether there is something better
- * to do for us here (like setting some device or
- * subchannel status).
- */
- program_interrupt(env, PGM_ADDRESSING, 4);
+ if (!sch || !css_subch_visible(sch)) {
+ setcc(cpu, 3);
return;
- case 0:
- cc = 0;
- break;
- default:
- cc = 1;
- break;
}
- setcc(cpu, cc);
+ setcc(cpu, css_do_ssch(sch, &orb));
}
void ioinst_handle_stcrw(S390CPU *cpu, uint32_t ipb)
@@ -784,8 +760,6 @@ 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, 4);
@@ -793,24 +767,11 @@ void ioinst_handle_rsch(S390CPU *cpu, uint64_t reg1)
}
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;
+ if (!sch || !css_subch_visible(sch)) {
+ setcc(cpu, 3);
+ return;
}
- setcc(cpu, cc);
+ setcc(cpu, css_do_rsch(sch));
}
#define RCHP_REG1_RES(_reg) (_reg & 0x00000000ff00ff00)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-22 01:16:05 +0000