| Message ID | 20191115033437.37926-6-farman@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | s390x/vfio-ccw: Channel Path Handling | expand |
On Fri, 15 Nov 2019 04:34:34 +0100 Eric Farman <farman@linux.ibm.com> wrote: > From: Farhan Ali <alifm@linux.ibm.com> > > The schib region can be used to obtain the latest SCHIB from the host > passthrough subchannel. Since the guest SCHIB is virtualized, > we currently only update the path related information so that the > guest is aware of any path related changes when it issues the > 'stsch' instruction. One important information here is that you tweak the generic stsch handling, although the behaviour remains the same for non-vfio subchannels. > > Signed-off-by: Farhan Ali <alifm@linux.ibm.com> > Signed-off-by: Eric Farman <farman@linux.ibm.com> > --- > > Notes: > v0->v1: [EF] > - Change various incarnations of "update chp status" to > "handle_store", to reflect the STSCH instruction that will > drive this code > - Remove temporary variable for casting/testing purposes in > s390_ccw_store(), and add a block comment of WHY its there. > - Add a few comments to vfio_ccw_handle_store() > > hw/s390x/css.c | 8 ++++-- > hw/s390x/s390-ccw.c | 20 +++++++++++++ > hw/vfio/ccw.c | 57 +++++++++++++++++++++++++++++++++++++ > include/hw/s390x/css.h | 3 +- > include/hw/s390x/s390-ccw.h | 1 + > target/s390x/ioinst.c | 3 +- > 6 files changed, 87 insertions(+), 5 deletions(-) > > diff --git a/hw/s390x/css.c b/hw/s390x/css.c > index 844caab408..6ee6a96d75 100644 > --- a/hw/s390x/css.c > +++ b/hw/s390x/css.c > @@ -1335,11 +1335,15 @@ static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src) > } > } > > -int css_do_stsch(SubchDev *sch, SCHIB *schib) > +IOInstEnding css_do_stsch(SubchDev *sch, SCHIB *schib) > { > + int ret = IOINST_CC_EXPECTED; It's a bit useless initializing ret here, given that you use it right below :) > + Maybe add a comment here: /* * For some subchannels, we may want to update parts of * the schib (e.g. update path masks from the host device * for passthrough subchannels). */ > + ret = s390_ccw_store(sch); > + > /* Use current status. */ > copy_schib_to_guest(schib, &sch->curr_status); > - return 0; > + return ret; > } > > static void copy_pmcw_from_guest(PMCW *dest, const PMCW *src) > diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c > index 0c5a5b60bd..be0b379338 100644 > --- a/hw/s390x/s390-ccw.c > +++ b/hw/s390x/s390-ccw.c > @@ -51,6 +51,26 @@ int s390_ccw_clear(SubchDev *sch) > return cdc->handle_clear(sch); > } > > +IOInstEnding s390_ccw_store(SubchDev *sch) > +{ > + S390CCWDeviceClass *cdc = NULL; > + int ret = IOINST_CC_EXPECTED; > + > + /* > + * This only applies to passthrough devices, so we can't unconditionally > + * set this variable like we would for halt/clear. Hm, can we maybe handle this differently? We have a generic ccw_cb in the subchannel structure for ccw interpretation; would it make sense to add a generic callback for stsch there as well? (This works fine, though. Might want to add the check for halt/clear as well, but that might be a bit overkill.) > + */ > + if (object_dynamic_cast(OBJECT(sch->driver_data), TYPE_S390_CCW)) { > + cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data); > + } > + > + if (cdc && cdc->handle_store) { > + ret = cdc->handle_store(sch); > + } > + > + return ret; > +} > + > static void s390_ccw_get_dev_info(S390CCWDevice *cdev, > char *sysfsdev, > Error **errp) > diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c > index 3e32bc1819..2ff223470f 100644 > --- a/hw/vfio/ccw.c > +++ b/hw/vfio/ccw.c > @@ -41,6 +41,9 @@ struct VFIOCCWDevice { > uint64_t async_cmd_region_size; > uint64_t async_cmd_region_offset; > struct ccw_cmd_region *async_cmd_region; > + uint64_t schib_region_size; > + uint64_t schib_region_offset; > + struct ccw_schib_region *schib_region; > EventNotifier io_notifier; > bool force_orb_pfch; > bool warned_orb_pfch; > @@ -124,6 +127,45 @@ again: > } > } > > +static IOInstEnding vfio_ccw_handle_store(SubchDev *sch) > +{ > + S390CCWDevice *cdev = sch->driver_data; > + VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev); > + SCHIB *schib = &sch->curr_status; > + struct ccw_schib_region *region = vcdev->schib_region; > + SCHIB *s = (SCHIB *)region->schib_area; You probably don't want to access region until after you checked it's not NULL :) > + int ret; > + > + /* schib region not available so nothing else to do */ > + if (!region) { > + return IOINST_CC_EXPECTED; > + } > + > + memset(region, 0, sizeof(*region)); > + ret = pread(vcdev->vdev.fd, region, vcdev->schib_region_size, > + vcdev->schib_region_offset); > + > + if (ret == -1) { > + /* Assume device is damaged, regardless of errno */ > + return IOINST_CC_NOT_OPERATIONAL; Not sure that's correct; cc 3 for stsch indicates that there are no more subchannels with higher ids? > + } > + > + /* > + * Selectively copy path-related bits of the SCHIB, > + * rather than copying the entire struct. > + */ > + schib->pmcw.pnom = s->pmcw.pnom; > + schib->pmcw.lpum = s->pmcw.lpum; > + schib->pmcw.pam = s->pmcw.pam; > + schib->pmcw.pom = s->pmcw.pom; > + > + if (s->scsw.flags & SCSW_FLAGS_MASK_PNO) { > + schib->scsw.flags |= SCSW_FLAGS_MASK_PNO; > + } > + > + return IOINST_CC_EXPECTED; > +} > + The rest of the patch looks good to me.
[Had two un-addressed QEMU comments on my todo list; let's do that now.] On 11/20/19 6:13 AM, Cornelia Huck wrote: > On Fri, 15 Nov 2019 04:34:34 +0100 > Eric Farman <farman@linux.ibm.com> wrote: > >> From: Farhan Ali <alifm@linux.ibm.com> >> >> The schib region can be used to obtain the latest SCHIB from the host >> passthrough subchannel. Since the guest SCHIB is virtualized, >> we currently only update the path related information so that the >> guest is aware of any path related changes when it issues the >> 'stsch' instruction. > > One important information here is that you tweak the generic stsch > handling, although the behaviour remains the same for non-vfio > subchannels. > >> >> Signed-off-by: Farhan Ali <alifm@linux.ibm.com> >> Signed-off-by: Eric Farman <farman@linux.ibm.com> >> --- >> >> Notes: >> v0->v1: [EF] >> - Change various incarnations of "update chp status" to >> "handle_store", to reflect the STSCH instruction that will >> drive this code >> - Remove temporary variable for casting/testing purposes in >> s390_ccw_store(), and add a block comment of WHY its there. >> - Add a few comments to vfio_ccw_handle_store() >> >> hw/s390x/css.c | 8 ++++-- >> hw/s390x/s390-ccw.c | 20 +++++++++++++ >> hw/vfio/ccw.c | 57 +++++++++++++++++++++++++++++++++++++ >> include/hw/s390x/css.h | 3 +- >> include/hw/s390x/s390-ccw.h | 1 + >> target/s390x/ioinst.c | 3 +- >> 6 files changed, 87 insertions(+), 5 deletions(-) >> >> diff --git a/hw/s390x/css.c b/hw/s390x/css.c >> index 844caab408..6ee6a96d75 100644 >> --- a/hw/s390x/css.c >> +++ b/hw/s390x/css.c >> @@ -1335,11 +1335,15 @@ static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src) >> } >> } >> >> -int css_do_stsch(SubchDev *sch, SCHIB *schib) >> +IOInstEnding css_do_stsch(SubchDev *sch, SCHIB *schib) >> { >> + int ret = IOINST_CC_EXPECTED; > > It's a bit useless initializing ret here, given that you use it right > below :) > >> + > > Maybe add a comment here: > > /* > * For some subchannels, we may want to update parts of > * the schib (e.g. update path masks from the host device > * for passthrough subchannels). > */ > >> + ret = s390_ccw_store(sch); >> + >> /* Use current status. */ >> copy_schib_to_guest(schib, &sch->curr_status); >> - return 0; >> + return ret; >> } >> >> static void copy_pmcw_from_guest(PMCW *dest, const PMCW *src) >> diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c >> index 0c5a5b60bd..be0b379338 100644 >> --- a/hw/s390x/s390-ccw.c >> +++ b/hw/s390x/s390-ccw.c >> @@ -51,6 +51,26 @@ int s390_ccw_clear(SubchDev *sch) >> return cdc->handle_clear(sch); >> } >> >> +IOInstEnding s390_ccw_store(SubchDev *sch) >> +{ >> + S390CCWDeviceClass *cdc = NULL; >> + int ret = IOINST_CC_EXPECTED; >> + >> + /* >> + * This only applies to passthrough devices, so we can't unconditionally >> + * set this variable like we would for halt/clear. > > Hm, can we maybe handle this differently? We have a generic ccw_cb in > the subchannel structure for ccw interpretation; would it make sense to > add a generic callback for stsch there as well? Might make things a little cleaner, but I am not sure. I'm going to leave a todo here while we sort out the rest of the kernel code, so I can try to put something more beneficial together. > > (This works fine, though. Might want to add the check for halt/clear as > well, but that might be a bit overkill.) > >> + */ >> + if (object_dynamic_cast(OBJECT(sch->driver_data), TYPE_S390_CCW)) { >> + cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data); >> + } >> + >> + if (cdc && cdc->handle_store) { >> + ret = cdc->handle_store(sch); >> + } >> + >> + return ret; >> +} >> + >> static void s390_ccw_get_dev_info(S390CCWDevice *cdev, >> char *sysfsdev, >> Error **errp) >> diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c >> index 3e32bc1819..2ff223470f 100644 >> --- a/hw/vfio/ccw.c >> +++ b/hw/vfio/ccw.c >> @@ -41,6 +41,9 @@ struct VFIOCCWDevice { >> uint64_t async_cmd_region_size; >> uint64_t async_cmd_region_offset; >> struct ccw_cmd_region *async_cmd_region; >> + uint64_t schib_region_size; >> + uint64_t schib_region_offset; >> + struct ccw_schib_region *schib_region; >> EventNotifier io_notifier; >> bool force_orb_pfch; >> bool warned_orb_pfch; >> @@ -124,6 +127,45 @@ again: >> } >> } >> >> +static IOInstEnding vfio_ccw_handle_store(SubchDev *sch) >> +{ >> + S390CCWDevice *cdev = sch->driver_data; >> + VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev); >> + SCHIB *schib = &sch->curr_status; >> + struct ccw_schib_region *region = vcdev->schib_region; >> + SCHIB *s = (SCHIB *)region->schib_area; > > You probably don't want to access region until after you checked it's > not NULL :) :) > >> + int ret; >> + >> + /* schib region not available so nothing else to do */ >> + if (!region) { >> + return IOINST_CC_EXPECTED; >> + } >> + >> + memset(region, 0, sizeof(*region)); >> + ret = pread(vcdev->vdev.fd, region, vcdev->schib_region_size, >> + vcdev->schib_region_offset); >> + >> + if (ret == -1) { >> + /* Assume device is damaged, regardless of errno */ >> + return IOINST_CC_NOT_OPERATIONAL; > > Not sure that's correct; cc 3 for stsch indicates that there are no > more subchannels with higher ids? POPS says cc=3 on stsch if the subchannel is not operational, and it's not operational if it's not provided to the channel subsystem. So, basically yes. I guess his idea was to call out a problem on the kvm side, so should we just return CC_EXPECTED here, as if there's no region? > >> + } >> + >> + /* >> + * Selectively copy path-related bits of the SCHIB, >> + * rather than copying the entire struct. >> + */ >> + schib->pmcw.pnom = s->pmcw.pnom; >> + schib->pmcw.lpum = s->pmcw.lpum; >> + schib->pmcw.pam = s->pmcw.pam; >> + schib->pmcw.pom = s->pmcw.pom; >> + >> + if (s->scsw.flags & SCSW_FLAGS_MASK_PNO) { >> + schib->scsw.flags |= SCSW_FLAGS_MASK_PNO; >> + } >> + >> + return IOINST_CC_EXPECTED; >> +} >> + > > The rest of the patch looks good to me. >
On Fri, 31 Jan 2020 15:15:00 -0500 Eric Farman <farman@linux.ibm.com> wrote: > [Had two un-addressed QEMU comments on my todo list; let's do that now.] > > On 11/20/19 6:13 AM, Cornelia Huck wrote: > > On Fri, 15 Nov 2019 04:34:34 +0100 > > Eric Farman <farman@linux.ibm.com> wrote: Oh, that was some time ago... hope I can still recall what I was thinking back then. > > > >> From: Farhan Ali <alifm@linux.ibm.com> > >> > >> The schib region can be used to obtain the latest SCHIB from the host > >> passthrough subchannel. Since the guest SCHIB is virtualized, > >> we currently only update the path related information so that the > >> guest is aware of any path related changes when it issues the > >> 'stsch' instruction. > > > > One important information here is that you tweak the generic stsch > > handling, although the behaviour remains the same for non-vfio > > subchannels. > > > >> > >> Signed-off-by: Farhan Ali <alifm@linux.ibm.com> > >> Signed-off-by: Eric Farman <farman@linux.ibm.com> > >> --- > >> > >> Notes: > >> v0->v1: [EF] > >> - Change various incarnations of "update chp status" to > >> "handle_store", to reflect the STSCH instruction that will > >> drive this code > >> - Remove temporary variable for casting/testing purposes in > >> s390_ccw_store(), and add a block comment of WHY its there. > >> - Add a few comments to vfio_ccw_handle_store() > >> > >> hw/s390x/css.c | 8 ++++-- > >> hw/s390x/s390-ccw.c | 20 +++++++++++++ > >> hw/vfio/ccw.c | 57 +++++++++++++++++++++++++++++++++++++ > >> include/hw/s390x/css.h | 3 +- > >> include/hw/s390x/s390-ccw.h | 1 + > >> target/s390x/ioinst.c | 3 +- > >> 6 files changed, 87 insertions(+), 5 deletions(-) > >> > >> diff --git a/hw/s390x/css.c b/hw/s390x/css.c > >> index 844caab408..6ee6a96d75 100644 > >> --- a/hw/s390x/css.c > >> +++ b/hw/s390x/css.c > >> @@ -1335,11 +1335,15 @@ static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src) > >> } > >> } > >> > >> -int css_do_stsch(SubchDev *sch, SCHIB *schib) > >> +IOInstEnding css_do_stsch(SubchDev *sch, SCHIB *schib) > >> { > >> + int ret = IOINST_CC_EXPECTED; > > > > It's a bit useless initializing ret here, given that you use it right > > below :) > > > >> + > > > > Maybe add a comment here: > > > > /* > > * For some subchannels, we may want to update parts of > > * the schib (e.g. update path masks from the host device > > * for passthrough subchannels). > > */ > > > >> + ret = s390_ccw_store(sch); > >> + > >> /* Use current status. */ > >> copy_schib_to_guest(schib, &sch->curr_status); > >> - return 0; > >> + return ret; > >> } > >> > >> static void copy_pmcw_from_guest(PMCW *dest, const PMCW *src) > >> diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c > >> index 0c5a5b60bd..be0b379338 100644 > >> --- a/hw/s390x/s390-ccw.c > >> +++ b/hw/s390x/s390-ccw.c > >> @@ -51,6 +51,26 @@ int s390_ccw_clear(SubchDev *sch) > >> return cdc->handle_clear(sch); > >> } > >> > >> +IOInstEnding s390_ccw_store(SubchDev *sch) > >> +{ > >> + S390CCWDeviceClass *cdc = NULL; > >> + int ret = IOINST_CC_EXPECTED; > >> + > >> + /* > >> + * This only applies to passthrough devices, so we can't unconditionally > >> + * set this variable like we would for halt/clear. > > > > Hm, can we maybe handle this differently? We have a generic ccw_cb in > > the subchannel structure for ccw interpretation; would it make sense to > > add a generic callback for stsch there as well? > > Might make things a little cleaner, but I am not sure. I'm going to > leave a todo here while we sort out the rest of the kernel code, so I > can try to put something more beneficial together. Yes, this looks like something that can be sorted out later. What bothers me most here, I guess, is that it is not very obvious why the functions above can assume the presence of the cdc object, while this one can't. The secret sauce is in the different do_subchannel_work_* callbacks, which reside in another file... maybe amend the comment here to mention that? That would help and doesn't involve code refactoring :) > > > > > (This works fine, though. Might want to add the check for halt/clear as > > well, but that might be a bit overkill.) > > > >> + */ > >> + if (object_dynamic_cast(OBJECT(sch->driver_data), TYPE_S390_CCW)) { > >> + cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data); > >> + } > >> + > >> + if (cdc && cdc->handle_store) { > >> + ret = cdc->handle_store(sch); > >> + } > >> + > >> + return ret; > >> +} > >> + > >> static void s390_ccw_get_dev_info(S390CCWDevice *cdev, > >> char *sysfsdev, > >> Error **errp) > >> diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c > >> index 3e32bc1819..2ff223470f 100644 > >> --- a/hw/vfio/ccw.c > >> +++ b/hw/vfio/ccw.c > >> @@ -41,6 +41,9 @@ struct VFIOCCWDevice { > >> uint64_t async_cmd_region_size; > >> uint64_t async_cmd_region_offset; > >> struct ccw_cmd_region *async_cmd_region; > >> + uint64_t schib_region_size; > >> + uint64_t schib_region_offset; > >> + struct ccw_schib_region *schib_region; > >> EventNotifier io_notifier; > >> bool force_orb_pfch; > >> bool warned_orb_pfch; > >> @@ -124,6 +127,45 @@ again: > >> } > >> } > >> > >> +static IOInstEnding vfio_ccw_handle_store(SubchDev *sch) > >> +{ > >> + S390CCWDevice *cdev = sch->driver_data; > >> + VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev); > >> + SCHIB *schib = &sch->curr_status; > >> + struct ccw_schib_region *region = vcdev->schib_region; > >> + SCHIB *s = (SCHIB *)region->schib_area; > > > > You probably don't want to access region until after you checked it's > > not NULL :) > > :) > > > > >> + int ret; > >> + > >> + /* schib region not available so nothing else to do */ > >> + if (!region) { > >> + return IOINST_CC_EXPECTED; > >> + } > >> + > >> + memset(region, 0, sizeof(*region)); > >> + ret = pread(vcdev->vdev.fd, region, vcdev->schib_region_size, > >> + vcdev->schib_region_offset); > >> + > >> + if (ret == -1) { > >> + /* Assume device is damaged, regardless of errno */ > >> + return IOINST_CC_NOT_OPERATIONAL; > > > > Not sure that's correct; cc 3 for stsch indicates that there are no > > more subchannels with higher ids? > > POPS says cc=3 on stsch if the subchannel is not operational, and it's > not operational if it's not provided to the channel subsystem. So, > basically yes. I guess his idea was to call out a problem on the kvm > side, so should we just return CC_EXPECTED here, as if there's no region? Yes, that looks like the better choice (out of the two possible condition codes...) And also log a moan somewhere? > > > > >> + } > >> + > >> + /* > >> + * Selectively copy path-related bits of the SCHIB, > >> + * rather than copying the entire struct. > >> + */ > >> + schib->pmcw.pnom = s->pmcw.pnom; > >> + schib->pmcw.lpum = s->pmcw.lpum; > >> + schib->pmcw.pam = s->pmcw.pam; > >> + schib->pmcw.pom = s->pmcw.pom; > >> + > >> + if (s->scsw.flags & SCSW_FLAGS_MASK_PNO) { > >> + schib->scsw.flags |= SCSW_FLAGS_MASK_PNO; > >> + } > >> + > >> + return IOINST_CC_EXPECTED; > >> +} > >> + > > > > The rest of the patch looks good to me. > > >
diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 844caab408..6ee6a96d75 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -1335,11 +1335,15 @@ static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src) } } -int css_do_stsch(SubchDev *sch, SCHIB *schib) +IOInstEnding css_do_stsch(SubchDev *sch, SCHIB *schib) { + int ret = IOINST_CC_EXPECTED; + + ret = s390_ccw_store(sch); + /* Use current status. */ copy_schib_to_guest(schib, &sch->curr_status); - return 0; + return ret; } static void copy_pmcw_from_guest(PMCW *dest, const PMCW *src) diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c index 0c5a5b60bd..be0b379338 100644 --- a/hw/s390x/s390-ccw.c +++ b/hw/s390x/s390-ccw.c @@ -51,6 +51,26 @@ int s390_ccw_clear(SubchDev *sch) return cdc->handle_clear(sch); } +IOInstEnding s390_ccw_store(SubchDev *sch) +{ + S390CCWDeviceClass *cdc = NULL; + int ret = IOINST_CC_EXPECTED; + + /* + * This only applies to passthrough devices, so we can't unconditionally + * set this variable like we would for halt/clear. + */ + if (object_dynamic_cast(OBJECT(sch->driver_data), TYPE_S390_CCW)) { + cdc = S390_CCW_DEVICE_GET_CLASS(sch->driver_data); + } + + if (cdc && cdc->handle_store) { + ret = cdc->handle_store(sch); + } + + return ret; +} + static void s390_ccw_get_dev_info(S390CCWDevice *cdev, char *sysfsdev, Error **errp) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 3e32bc1819..2ff223470f 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -41,6 +41,9 @@ struct VFIOCCWDevice { uint64_t async_cmd_region_size; uint64_t async_cmd_region_offset; struct ccw_cmd_region *async_cmd_region; + uint64_t schib_region_size; + uint64_t schib_region_offset; + struct ccw_schib_region *schib_region; EventNotifier io_notifier; bool force_orb_pfch; bool warned_orb_pfch; @@ -124,6 +127,45 @@ again: } } +static IOInstEnding vfio_ccw_handle_store(SubchDev *sch) +{ + S390CCWDevice *cdev = sch->driver_data; + VFIOCCWDevice *vcdev = DO_UPCAST(VFIOCCWDevice, cdev, cdev); + SCHIB *schib = &sch->curr_status; + struct ccw_schib_region *region = vcdev->schib_region; + SCHIB *s = (SCHIB *)region->schib_area; + int ret; + + /* schib region not available so nothing else to do */ + if (!region) { + return IOINST_CC_EXPECTED; + } + + memset(region, 0, sizeof(*region)); + ret = pread(vcdev->vdev.fd, region, vcdev->schib_region_size, + vcdev->schib_region_offset); + + if (ret == -1) { + /* Assume device is damaged, regardless of errno */ + return IOINST_CC_NOT_OPERATIONAL; + } + + /* + * Selectively copy path-related bits of the SCHIB, + * rather than copying the entire struct. + */ + schib->pmcw.pnom = s->pmcw.pnom; + schib->pmcw.lpum = s->pmcw.lpum; + schib->pmcw.pam = s->pmcw.pam; + schib->pmcw.pom = s->pmcw.pom; + + if (s->scsw.flags & SCSW_FLAGS_MASK_PNO) { + schib->scsw.flags |= SCSW_FLAGS_MASK_PNO; + } + + return IOINST_CC_EXPECTED; +} + static int vfio_ccw_handle_clear(SubchDev *sch) { S390CCWDevice *cdev = sch->driver_data; @@ -395,10 +437,23 @@ static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp) vcdev->async_cmd_region = g_malloc0(info->size); } + ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW, + VFIO_REGION_SUBTYPE_CCW_SCHIB, &info); + if (!ret) { + vcdev->schib_region_size = info->size; + if (sizeof(*vcdev->schib_region) != vcdev->schib_region_size) { + error_setg(errp, "vfio: Unexpected size of the schib region"); + goto out_err; + } + vcdev->schib_region_offset = info->offset; + vcdev->schib_region = g_malloc(info->size); + } + g_free(info); return; out_err: + g_free(vcdev->schib_region); g_free(vcdev->async_cmd_region); g_free(vcdev->io_region); g_free(info); @@ -407,6 +462,7 @@ out_err: static void vfio_ccw_put_region(VFIOCCWDevice *vcdev) { + g_free(vcdev->schib_region); g_free(vcdev->async_cmd_region); g_free(vcdev->io_region); } @@ -582,6 +638,7 @@ static void vfio_ccw_class_init(ObjectClass *klass, void *data) cdc->handle_request = vfio_ccw_handle_request; cdc->handle_halt = vfio_ccw_handle_halt; cdc->handle_clear = vfio_ccw_handle_clear; + cdc->handle_store = vfio_ccw_handle_store; } static const TypeInfo vfio_ccw_info = { diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index f46bcafb16..7e3a5e7433 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -218,6 +218,7 @@ IOInstEnding do_subchannel_work_passthrough(SubchDev *sub); int s390_ccw_halt(SubchDev *sch); int s390_ccw_clear(SubchDev *sch); +IOInstEnding s390_ccw_store(SubchDev *sch); typedef enum { CSS_IO_ADAPTER_VIRTIO = 0, @@ -242,7 +243,7 @@ SubchDev *css_find_subch(uint8_t m, uint8_t cssid, uint8_t ssid, uint16_t schid); bool css_subch_visible(SubchDev *sch); void css_conditional_io_interrupt(SubchDev *sch); -int css_do_stsch(SubchDev *sch, SCHIB *schib); +IOInstEnding css_do_stsch(SubchDev *sch, SCHIB *schib); bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); IOInstEnding css_do_msch(SubchDev *sch, const SCHIB *schib); IOInstEnding css_do_xsch(SubchDev *sch); diff --git a/include/hw/s390x/s390-ccw.h b/include/hw/s390x/s390-ccw.h index fffb54562f..4a43803ef2 100644 --- a/include/hw/s390x/s390-ccw.h +++ b/include/hw/s390x/s390-ccw.h @@ -37,6 +37,7 @@ typedef struct S390CCWDeviceClass { IOInstEnding (*handle_request) (SubchDev *sch); int (*handle_halt) (SubchDev *sch); int (*handle_clear) (SubchDev *sch); + IOInstEnding (*handle_store) (SubchDev *sch); } S390CCWDeviceClass; #endif diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c index c437a1d8c6..63b4c84215 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -257,8 +257,7 @@ void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, sch = css_find_subch(m, cssid, ssid, schid); if (sch) { if (css_subch_visible(sch)) { - css_do_stsch(sch, &schib); - cc = 0; + cc = css_do_stsch(sch, &schib); } else { /* Indicate no more subchannels in this css/ss */ cc = 3;