From: David Gibson Date: Wed, 31 Aug 2005 04:34:05 +0000 (+1000) Subject: [PATCH] Fix bug in ppc64 dynamic hugepage support X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=319e76a1ae835c34a2838c2bfebe3db4d5a6b387;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git [PATCH] Fix bug in ppc64 dynamic hugepage support 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 Signed-off-by: Linus Torvalds --- diff --git a/arch/ppc64/mm/slb_low.S b/arch/ppc64/mm/slb_low.S index bab255889c58..698d6b9ed6d1 100644 --- a/arch/ppc64/mm/slb_low.S +++ b/arch/ppc64/mm/slb_low.S @@ -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 + lhz r11,PACALOWHTLBAREAS(r13) + srd r11,r11,r3 + or r9,r9,r11 +END_FTR_SECTION_IFSET(CPU_FTR_16M_PAGE) +#endif /* CONFIG_HUGETLB_PAGE */ 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 +#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 */ -6: ld r9,PACACONTEXTID(r13) + ld r9,PACACONTEXTID(r13) rldimi r3,r9,USER_ESID_BITS,0 9: /* r3 = protovsid, r11 = flags, r10 = esid_data, cr7 = <>KERNELBASE */