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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-08-01 09:02:06 -0500 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.ibm.com> | 2018-08-02 02:24:06 -0500 |
| commit | 7db7c9f652295a47b7fed0fb62787ab795216a18 (patch) | |
| tree | 7178a034ca43ba12d119b90a4eb1508f1f190e46 /hw/xive.c | |
| parent | 01089cb8b4a20bbf63459489312c883e210ba27e (diff) | |
| download | skiboot-7db7c9f652295a47b7fed0fb62787ab795216a18.zip skiboot-7db7c9f652295a47b7fed0fb62787ab795216a18.tar.gz skiboot-7db7c9f652295a47b7fed0fb62787ab795216a18.tar.bz2 | |
xive: Disable block tracker
Due to some HW errata, the block tracking facility (performance optimisation
for large systems) should be disabled on Nimbus chips. Disable it unconditionally
for now.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
Diffstat (limited to 'hw/xive.c')
| -rw-r--r-- | hw/xive.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -1762,9 +1762,11 @@ static bool xive_config_init(struct xive *x) val |= VC_SBC_CONF_NO_UPD_PRF; xive_regw(x, VC_SBC_CONFIG, val); - /* Enable block tracking */ + /* Disable block tracking on Nimbus (we may want to enable + * it on Cumulus later). HW Erratas. + */ val = xive_regr(x, PC_TCTXT_TRACK); - val |= PC_TCTXT_TRACK_EN; + val &= ~PC_TCTXT_TRACK_EN; xive_regw(x, PC_TCTXT_TRACK, val); /* Enable relaxed ordering of trigger forwarding */ |