[coreboot-gerrit] [S] Change in coreboot[master]: mb/siemens/mc_ehl2: Disable L1 prefetcher

[Mario Scheithauer (Code Review)]

Attention is currently required from: Mario Scheithauer, Werner Zeh.

Hello Werner Zeh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/69966

to look at the new patch set (#3).

Change subject: mb/siemens/mc_ehl2: Disable L1 prefetcher
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mb/siemens/mc_ehl2: Disable L1 prefetcher

As for mainboard mc_ehl1, a hard real-time dependency is also required
for this mainboard. The L1 prefetcher on Elkhart Lake is too aggressive
which in the end leads to an increased number of cache misses. Disabling
the L1 prefetcher boosts up the performance (in some cases by more than
10 %) in this specific use case.

Change-Id: I07b27dd672533e693a6c2987d16f54333850760e
Signed-off-by: Mario Scheithauer 
---
M src/mainboard/siemens/mc_ehl/variants/mc_ehl2/devicetree.cb
1 file changed, 19 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/66/69966/3