From eb24f7c6896e93047f2c58ffd3ba4f453e88280b Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Tue, 30 Sep 2014 10:57:29 +0200 Subject: 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 Signed-off-by: Jens Freimann Reviewed-by: Cornelia Huck Reviewed-by: Christian Borntraeger CC: Andreas Faerber Tested-by: Christian Borntraeger Signed-off-by: Cornelia Huck --- trace-events | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'trace-events') diff --git a/trace-events b/trace-events index 011d105..5202f20 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" -- cgit v1.1