diff options
| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2014-09-30 10:57:29 +0200 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-10-10 10:37:47 +0200 |
| commit | eb24f7c6896e93047f2c58ffd3ba4f453e88280b (patch) | |
| tree | d8d615b55773f051b51b70a5ed9822fa91c7f338 /trace-events | |
| parent | 75973bfe415774babe7c1e18fa682c050fdce73b (diff) | |
s390x/kvm: proper use of the cpu states OPERATING and STOPPED
This patch makes sure that halting a cpu and stopping a cpu are two different
things. Stopping a cpu will also set the cpu halted - this is needed for common
infrastructure to work (note that the stop and stopped flag cannot be used for
our purpose because they are already used by other mechanisms).
A cpu can be halted ("waiting") when it is operating. If interrupts are
disabled, this is called a "disabled wait", as it can't be woken up anymore. A
stopped cpu is treated like a "disabled wait" cpu, but in order to prepare for a
proper cpu state synchronization with the kvm part, we need to track the real
logical state of a cpu.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
CC: Andreas Faerber <afaerber@suse.de>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'trace-events')
| -rw-r--r-- | trace-events | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/trace-events b/trace-events index 011d1059f8..5202f205a0 100644 --- a/trace-events +++ b/trace-events @@ -1372,3 +1372,8 @@ kvm_clear_cmma(int rc) "CMMA: clearing with result code %d" # hw/dma/i8257.c i8257_unregistered_dma(int nchan, int dma_pos, int dma_len) "unregistered DMA channel used nchan=%d dma_pos=%d dma_len=%d" + +# target-s390x/cpu.c +cpu_set_state(int cpu_index, uint8_t state) "setting cpu %d state to %" PRIu8 +cpu_halt(int cpu_index) "halting cpu %d" +cpu_unhalt(int cpu_index) "unhalting cpu %d" |