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Diffstat (limited to 'doc/xive.rst')
| -rw-r--r-- | doc/xive.rst | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/doc/xive.rst b/doc/xive.rst index c35db6e..0997c72 100644 --- a/doc/xive.rst +++ b/doc/xive.rst @@ -657,17 +657,12 @@ This call returns information about a VP: - OPAL_XIVE_VP_ENABLED - This must be set for the VP to be usable and cleared before freeing it + Returns the enabled state of the VP - OPAL_XIVE_VP_SINGLE_ESCALATION (if available) - If this is set, the queues are configured such that all priorities - turn into a single escalation interrupt. This results in the loss of - priority 7 which can no longer be used. This this needs to be set - before any interrupt is routed to that priority. - - This feature is available if the "single-escalation-property" is - present in the xive device-tree node. + Returns whether single escalation mode is enabled for this VP + (see opal_xive_set_vp_info()). * cam_value: This is the value to program into the thread management area to dispatch that VP (ie, an encoding of the block + index). @@ -696,6 +691,24 @@ This call configures a VP: .. note:: This can be used to disable the boot time VPs though this isn't recommended. This must be used to enable allocated VPs. + - OPAL_XIVE_VP_SINGLE_ESCALATION (if available) + + If this is set, the queues are configured such that all priorities + turn into a single escalation interrupt. This results in the loss of + priority 7 which can no longer be used. This this needs to be set + before any interrupt is routed to that priority and queue 7 must not + have been already enabled. + + This feature is available if the "single-escalation-property" is + present in the xive device-tree node. + + .. warning:: When enabling single escalation, and pre-existing routing + and configuration of the individual queues escalation + is lost (except queue 7 which is the new merged escalation). + When further disabling it, the previous value is not + retrieved and the field cleared, escalation is disabled on + all the queues. + * report_cl_pair: This is the real address of the reporting cache line pair for that VP or 0 to disable. |