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[PATCH] Fix bug in ppc64 dynamic hugepage support

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In adjusting the logic for SLB miss for the dynamic hugepage stuff, I
messed up the !CONFIG_HUGETLB_PAGE case, failing to set the SLB flags
properly.

This fixes it.  It also streamlines the logic for the HUGETLB_PAGE case
(removing a couple of branches) while we're at it.

Booted, and roughly tested on POWER5 (with and without HUGETLB_PAGE),
iSeries/RS64 (no hugepage available), and G5 (with and without
HUGETLB_PAGE).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Gibson 2005-08-31 14:34:05 +10:00 committed by Linus Torvalds
parent 7eaa414ee8
commit 319e76a1ae
1 changed files with 12 additions and 16 deletions
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28
arch/ppc64/mm/slb_low.S
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@ -97,25 +97,21 @@ BEGIN_FTR_SECTION
lhz r9,PACAHIGHHTLBAREAS(r13)
srdi r11,r3,(HTLB_AREA_SHIFT-SID_SHIFT)
srd r9,r9,r11
andi. r9,r9,1
bne 5f
li r11,SLB_VSID_USER
cmpldi r3,16
bge 6f
lhz r9,PACALOWHTLBAREAS(r13)
srd r9,r9,r3
andi. r9,r9,1
beq 6f
5: li r11,SLB_VSID_USER|SLB_VSID_L
lhz r11,PACALOWHTLBAREAS(r13)
srd r11,r11,r3
or r9,r9,r11
END_FTR_SECTION_IFSET(CPU_FTR_16M_PAGE)
#endif /* CONFIG_HUGETLB_PAGE */
6: ld r9,PACACONTEXTID(r13)
li r11,SLB_VSID_USER
#ifdef CONFIG_HUGETLB_PAGE
BEGIN_FTR_SECTION
rldimi r11,r9,8,55 /* shift masked bit into SLB_VSID_L */
END_FTR_SECTION_IFSET(CPU_FTR_16M_PAGE)
#endif /* CONFIG_HUGETLB_PAGE */
ld r9,PACACONTEXTID(r13)
rldimi r3,r9,USER_ESID_BITS,0
9: /* r3 = protovsid, r11 = flags, r10 = esid_data, cr7 = <>KERNELBASE */