diff options
| author | Thomas Huth <thuth@linux.vnet.ibm.com> | 2015-02-12 18:09:38 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-02-18 09:37:15 +0100 |
| commit | 7f74f0aa74a01698ef24459f7bc2a23f3880a2b8 (patch) | |
| tree | bf19104bc63d96dca30d38cd3f5f4f5dd15b6bdc /hw/s390x/css.c | |
| parent | b7b6348ab433519f16c1500e3ea04805428be91e (diff) | |
s390x/ioinst: Rework memory access in STCRW instruction
Change the handler for STCRW to use the new logical memory access
functions. Since STCRW is suppressed on protection/access exceptions,
we also have to make sure to re-queue the CRW in case it could not be
written to the memory.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'hw/s390x/css.c')
| -rw-r--r-- | hw/s390x/css.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/hw/s390x/css.c b/hw/s390x/css.c index f6d0c0a80e..9a13b006dd 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -955,6 +955,26 @@ int css_do_stcrw(CRW *crw) return ret; } +static void copy_crw_from_guest(CRW *dest, const CRW *src) +{ + dest->flags = be16_to_cpu(src->flags); + dest->rsid = be16_to_cpu(src->rsid); +} + +void css_undo_stcrw(CRW *crw) +{ + CrwContainer *crw_cont; + + crw_cont = g_try_malloc0(sizeof(CrwContainer)); + if (!crw_cont) { + channel_subsys->crws_lost = true; + return; + } + copy_crw_from_guest(&crw_cont->crw, crw); + + QTAILQ_INSERT_HEAD(&channel_subsys->pending_crws, crw_cont, sibling); +} + int css_do_tpi(IOIntCode *int_code, int lowcore) { /* No pending interrupts for !KVM. */ |