diff options
| author | Dominik Dingel <dingel@linux.vnet.ibm.com> | 2014-04-11 13:47:40 +0200 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-06-10 09:50:27 +0200 |
| commit | 4cb88c3c378ae8c86c0ba53619caf6924f72239c (patch) | |
| tree | 9a1c2b712ab288b337c25daaec48e627961bcb6b /target-s390x/misc_helper.c | |
| parent | 08da527fd07cf01dc29ca60a144fbdd60b0fb7c0 (diff) | |
s390x/kvm: enable/reset cmma via vm attributes
Exploit the new api for userspace-controlled cmma. If supported, enable
cmma during kvm initialization and register a reset handler for cmma,
which is also called directly from the load IPL code.
The reset functionality is needed to reset the cmma state of the guest
pages, e.g. if a system reset is triggered via qemu monitor; otherwise
this could result in data corruption.
A guest triggered reboot may now lead to multiple cmma resets; this is
OK, however, as this is slowpath anyway and the simplest way to achieve
the intended effects.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'target-s390x/misc_helper.c')
| -rw-r--r-- | target-s390x/misc_helper.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c index 9dae0256fa..519edb81dd 100644 --- a/target-s390x/misc_helper.c +++ b/target-s390x/misc_helper.c @@ -136,6 +136,7 @@ static int modified_clear_reset(S390CPU *cpu) pause_all_vcpus(); cpu_synchronize_all_states(); cpu_full_reset_all(); + cmma_reset(cpu); io_subsystem_reset(); scc->load_normal(CPU(cpu)); cpu_synchronize_all_post_reset(); @@ -150,6 +151,7 @@ static int load_normal_reset(S390CPU *cpu) pause_all_vcpus(); cpu_synchronize_all_states(); cpu_reset_all(); + cmma_reset(cpu); io_subsystem_reset(); scc->initial_cpu_reset(CPU(cpu)); scc->load_normal(CPU(cpu)); |