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| author | Stewart Smith <stewart@linux.vnet.ibm.com> | 2016-07-06 19:28:27 +1000 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2016-07-06 19:28:27 +1000 |
| commit | 45d1baf860b9c60baea4fdb8badff60a31bb9627 (patch) | |
| tree | b58c167caa53deaafc7042a0f681103ba01c3a89 /doc | |
| parent | 1bd1063a9953ec77cb5b22ae2ae1c2ed563059a8 (diff) | |
| download | skiboot-45d1baf860b9c60baea4fdb8badff60a31bb9627.zip skiboot-45d1baf860b9c60baea4fdb8badff60a31bb9627.tar.gz skiboot-45d1baf860b9c60baea4fdb8badff60a31bb9627.tar.bz2 | |
doc/OPAL_INT_EOI: document positive return value
From benh suggestion in id:1467792521.13965.118.camel@kernel.crashing.org
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/opal-api/opal-int-eoi-124.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/opal-api/opal-int-eoi-124.txt b/doc/opal-api/opal-int-eoi-124.txt index 9405018..17e4eff 100644 --- a/doc/opal-api/opal-int-eoi-124.txt +++ b/doc/opal-api/opal-int-eoi-124.txt @@ -7,6 +7,11 @@ Not yet implemented. Modelled on the H_EOI PAPR call. +This can return a positive value, which means more interrupts +are queued for that CPU/priority and must be fetched as the XIVE is not +guaranteed to assert the CPU external interrupt line again until the +pending queue for the current priority has been emptied. + For P9 and above systems where host doesn't know about interrupt controller. An OS can instead make OPAL calls for XICS emulation. |