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authorPaul Mackerras <paulus@samba.org>2005-12-05 14:19:10 +1100
committerPaul Mackerras <paulus@samba.org>2005-12-05 14:19:10 +1100
commit6fbb618f5da0424adcba5f666035e4772a8df526 (patch)
tree599edd9f3bce29e3153b086bec87862e78bb889d /arch
parente8a167accb47de528d2ffddc0f13f8e84eaa71de (diff)
downloadop-kernel-dev-6fbb618f5da0424adcba5f666035e4772a8df526.zip
op-kernel-dev-6fbb618f5da0424adcba5f666035e4772a8df526.tar.gz
powerpc/pseries: Optimize IOMMU setup
The previous commit will use the page-at-a-time hypervisor call for setting up IOMMU entries when we are using 64k pages and setting up one 64k page, even though that means 16 calls to the hypervisor, since the hypervisor still works on 4k pages. This optimizes this case by using the multi-page IOMMU setup hypervisor call instead. Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/pseries/iommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index fa1edbd..2043659 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -146,7 +146,7 @@ static void tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
union tce_entry tce, *tcep;
long l, limit;
- if (npages == 1)
+ if (TCE_PAGE_FACTOR == 0 && npages == 1)
return tce_build_pSeriesLP(tbl, tcenum, npages, uaddr,
direction);
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