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[PULL 37/37] s390x/css: Add passthrough IRB
From: |
Cornelia Huck |
Subject: |
[PULL 37/37] s390x/css: Add passthrough IRB |
Date: |
Mon, 21 Jun 2021 11:58:42 +0200 |
From: Eric Farman <farman@linux.ibm.com>
Wire in the subchannel callback for building the IRB
ESW and ECW space for passthrough devices, and copy
the hardware's ESW into the IRB we are building.
If the hardware presented concurrent sense, then copy
that sense data into the IRB's ECW space.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20210617232537.1337506-5-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
hw/s390x/css.c | 16 +++++++++++++++-
hw/s390x/s390-ccw.c | 1 +
hw/vfio/ccw.c | 4 ++++
include/hw/s390x/css.h | 3 +++
4 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index 1a3aad516363..133ddea5757e 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -1335,7 +1335,7 @@ static void copy_schib_to_guest(SCHIB *dest, const SCHIB
*src)
}
}
-static void copy_esw_to_guest(ESW *dest, const ESW *src)
+void copy_esw_to_guest(ESW *dest, const ESW *src)
{
dest->word0 = cpu_to_be32(src->word0);
dest->erw = cpu_to_be32(src->erw);
@@ -1650,6 +1650,20 @@ static void build_irb_sense_data(SubchDev *sch, IRB *irb)
}
}
+void build_irb_passthrough(SubchDev *sch, IRB *irb)
+{
+ /* Copy ESW from hardware */
+ irb->esw = sch->esw;
+
+ /*
+ * If (irb->esw.erw & ESW_ERW_SENSE) is true, then the contents
+ * of the ECW is sense data. If false, then it is model-dependent
+ * information. Either way, copy it into the IRB for the guest to
+ * read/decide what to do with.
+ */
+ build_irb_sense_data(sch, irb);
+}
+
void build_irb_virtual(SubchDev *sch, IRB *irb)
{
SCHIB *schib = &sch->curr_status;
diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c
index c227c77984ce..2fc8bb9c2327 100644
--- a/hw/s390x/s390-ccw.c
+++ b/hw/s390x/s390-ccw.c
@@ -124,6 +124,7 @@ static void s390_ccw_realize(S390CCWDevice *cdev, char
*sysfsdev, Error **errp)
}
sch->driver_data = cdev;
sch->do_subchannel_work = do_subchannel_work_passthrough;
+ sch->irb_cb = build_irb_passthrough;
ccw_dev->sch = sch;
ret = css_sch_build_schib(sch, &cdev->hostid);
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 139a3d9d1b95..000992fb9fb6 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -321,6 +321,7 @@ static void vfio_ccw_io_notifier_handler(void *opaque)
SCHIB *schib = &sch->curr_status;
SCSW s;
IRB irb;
+ ESW esw;
int size;
if (!event_notifier_test_and_clear(&vcdev->io_notifier)) {
@@ -371,6 +372,9 @@ static void vfio_ccw_io_notifier_handler(void *opaque)
copy_scsw_to_guest(&s, &irb.scsw);
schib->scsw = s;
+ copy_esw_to_guest(&esw, &irb.esw);
+ sch->esw = esw;
+
/* If a uint check is pending, copy sense data. */
if ((schib->scsw.dstat & SCSW_DSTAT_UNIT_CHECK) &&
(schib->pmcw.chars & PMCW_CHARS_MASK_CSENSE)) {
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h
index 7c23a13f3d3d..10ed1df1bb74 100644
--- a/include/hw/s390x/css.h
+++ b/include/hw/s390x/css.h
@@ -141,6 +141,7 @@ struct SubchDev {
void (*irb_cb)(SubchDev *, IRB *);
SenseId id;
void *driver_data;
+ ESW esw;
};
static inline void sch_gen_unit_exception(SubchDev *sch)
@@ -202,6 +203,7 @@ int css_sch_build_schib(SubchDev *sch, CssDevId *dev_id);
unsigned int css_find_free_chpid(uint8_t cssid);
uint16_t css_build_subchannel_id(SubchDev *sch);
void copy_scsw_to_guest(SCSW *dest, const SCSW *src);
+void copy_esw_to_guest(ESW *dest, const ESW *src);
void css_inject_io_interrupt(SubchDev *sch);
void css_reset(void);
void css_reset_sch(SubchDev *sch);
@@ -216,6 +218,7 @@ void css_clear_sei_pending(void);
IOInstEnding s390_ccw_cmd_request(SubchDev *sch);
IOInstEnding do_subchannel_work_virtual(SubchDev *sub);
IOInstEnding do_subchannel_work_passthrough(SubchDev *sub);
+void build_irb_passthrough(SubchDev *sch, IRB *irb);
void build_irb_virtual(SubchDev *sch, IRB *irb);
int s390_ccw_halt(SubchDev *sch);
--
2.31.1
- [PULL 26/37] s390x/tcg: We support Vector enhancements facility, (continued)
- [PULL 26/37] s390x/tcg: We support Vector enhancements facility, Cornelia Huck, 2021/06/21
- [PULL 28/37] configure: Check whether we can compile the s390-ccw bios with -msoft-float, Cornelia Huck, 2021/06/21
- [PULL 29/37] target/s390x: Expose load_psw and get_psw_mask to cpu.h, Cornelia Huck, 2021/06/21
- [PULL 30/37] target/s390x: Do not modify cpu state in s390_cpu_get_psw_mask, Cornelia Huck, 2021/06/21
- [PULL 31/37] target/s390x: Improve s390_cpu_dump_state vs cc_op, Cornelia Huck, 2021/06/21
- [PULL 32/37] target/s390x: Use s390_cpu_{set_psw, get_psw_mask} in gdbstub, Cornelia Huck, 2021/06/21
- [PULL 35/37] s390x/css: Split out the IRB sense data, Cornelia Huck, 2021/06/21
- [PULL 33/37] linux-user/s390x: Save and restore psw.mask properly, Cornelia Huck, 2021/06/21
- [PULL 34/37] s390x/css: Introduce an ESW struct, Cornelia Huck, 2021/06/21
- [PULL 36/37] s390x/css: Refactor IRB construction, Cornelia Huck, 2021/06/21
- [PULL 37/37] s390x/css: Add passthrough IRB,
Cornelia Huck <=
- Re: [PULL 00/37] s390x update, no-reply, 2021/06/21
- Re: [PULL 00/37] s390x update, Peter Maydell, 2021/06/22