[Skiboot] [PATCH 06/13] xive: Spread the notification ports a bit
Benjamin Herrenschmidt
benh at kernel.crashing.org
Mon Jan 16 15:36:28 AEDT 2017
There are 4 snoopers, 0 and 3 are pretty busy, so let's use a mix
of 1 and 2 for the PHB and PSI notification ports. We do that by
using different cache line offsets. We use 1 for PHB0 which tends
to be the highest performance one and 2 for everybody else
Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---
hw/xive.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/hw/xive.c b/hw/xive.c
index 6908835..33695f0 100644
--- a/hw/xive.c
+++ b/hw/xive.c
@@ -2043,28 +2043,30 @@ uint64_t xive_get_notify_port(uint32_t chip_id, uint32_t ent)
* PH4_2 addr 0x110 (CL 2 DW2)
* etc.
* >>
+ *
+ * I'm using snoop1 for PHB0 and snoop2 for everybody else.
*/
switch(ent) {
case XIVE_HW_SRC_PHBn(0):
offset = 0x100;
break;
case XIVE_HW_SRC_PHBn(1):
- offset = 0x108;
+ offset = 0x208;
break;
case XIVE_HW_SRC_PHBn(2):
- offset = 0x110;
+ offset = 0x210;
break;
case XIVE_HW_SRC_PHBn(3):
- offset = 0x118;
+ offset = 0x218;
break;
case XIVE_HW_SRC_PHBn(4):
- offset = 0x120;
+ offset = 0x220;
break;
case XIVE_HW_SRC_PHBn(5):
- offset = 0x128;
+ offset = 0x228;
break;
case XIVE_HW_SRC_PSI:
- offset = 0x130;
+ offset = 0x230;
break;
default:
assert(false);
--
2.9.3
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