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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2016-12-22 14:16:16 +1100 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-01-05 15:27:43 +1100 |
| commit | 7147bd5f9405d503fd865e7dbc163c475bebd75b (patch) | |
| tree | a4e373c1a5b921501d55e77a1773597af7aea9df /include/xive.h | |
| parent | 48c6850c54de370d82e24e68bccb6bc5db3a32da (diff) | |
| download | skiboot-7147bd5f9405d503fd865e7dbc163c475bebd75b.zip skiboot-7147bd5f9405d503fd865e7dbc163c475bebd75b.tar.gz skiboot-7147bd5f9405d503fd865e7dbc163c475bebd75b.tar.bz2 | |
xive: Add support for escalation interrupts
Escalation interrupts have their "IVE" entry buried inside of
the EQ that shoots them which complicates matters. We want to
expose them to the OS as normal interrupts, so we dedicate a
bit in the interrupt number (outside the range supported by
the OPAL emulation API) to differenciate them. The BlockID and
Index in the interrupt number now refer to the source EQ.
This is still missing proper cache management for them, which
will come in a separate patch.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'include/xive.h')
| -rw-r--r-- | include/xive.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/xive.h b/include/xive.h index 065aa69..e35da6d 100644 --- a/include/xive.h +++ b/include/xive.h @@ -276,6 +276,9 @@ * * One per interrupt source. Targets that interrupt to a given EQ * and provides the corresponding logical interrupt number (EQ data) + * + * We also map this structure to the escalation descriptor inside + * an EQ, though in that case the valid and masked bits are not used. */ struct xive_ive { /* Use a single 64-bit definition to make it easier to |