diff options
| author | Collin L. Walling <walling@linux.vnet.ibm.com> | 2017-10-04 12:57:50 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2017-10-06 10:53:02 +0200 |
| commit | 7edd4a4967536f9e1a6474223e824049a13dd39c (patch) | |
| tree | 1b02c94e7a63a5dcc85bfed29d4b7b3b4edd996b /target/s390x/kvm.c | |
| parent | 489c909f097a387eb6913c89cf1851750397110c (diff) | |
| download | qemu-7edd4a4967536f9e1a6474223e824049a13dd39c.zip qemu-7edd4a4967536f9e1a6474223e824049a13dd39c.tar.gz qemu-7edd4a4967536f9e1a6474223e824049a13dd39c.tar.bz2 | |
s390/kvm: Support for get/set of extended TOD-Clock for guest
Provides an interface for getting and setting the guest's extended
TOD-Clock via a single ioctl to kvm. If the ioctl fails because it
is not support by kvm, then we fall back to the old style of
retrieving the clock via two ioctls.
Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: Eric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[split failure change from epoch index change]
Message-Id: <20171004105751.24655-2-borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
[some cosmetic fixes]
Diffstat (limited to 'target/s390x/kvm.c')
| -rw-r--r-- | target/s390x/kvm.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c index 7f8c6c4..d3700fc 100644 --- a/target/s390x/kvm.c +++ b/target/s390x/kvm.c @@ -646,10 +646,26 @@ int kvm_s390_get_clock(uint8_t *tod_high, uint64_t *tod_low) return kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); } -int kvm_s390_set_clock(uint8_t *tod_high, uint64_t *tod_low) +int kvm_s390_get_clock_ext(uint8_t *tod_high, uint64_t *tod_low) { int r; + struct kvm_s390_vm_tod_clock gtod; + struct kvm_device_attr attr = { + .group = KVM_S390_VM_TOD, + .attr = KVM_S390_VM_TOD_EXT, + .addr = (uint64_t)>od, + }; + + r = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr); + *tod_high = gtod.epoch_idx; + *tod_low = gtod.tod; + return r; +} + +int kvm_s390_set_clock(uint8_t *tod_high, uint64_t *tod_low) +{ + int r; struct kvm_device_attr attr = { .group = KVM_S390_VM_TOD, .attr = KVM_S390_VM_TOD_LOW, @@ -666,6 +682,21 @@ int kvm_s390_set_clock(uint8_t *tod_high, uint64_t *tod_low) return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); } +int kvm_s390_set_clock_ext(uint8_t *tod_high, uint64_t *tod_low) +{ + struct kvm_s390_vm_tod_clock gtod = { + .epoch_idx = *tod_high, + .tod = *tod_low, + }; + struct kvm_device_attr attr = { + .group = KVM_S390_VM_TOD, + .attr = KVM_S390_VM_TOD_EXT, + .addr = (uint64_t)>od, + }; + + return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); +} + /** * kvm_s390_mem_op: * @addr: the logical start address in guest memory |