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powerpc/book3e: Fix check for linear mapping in TLB miss handler

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The previous code added wrong TLBs and causes machine check errors if
a driver accessed passed the end of the linear mapping instead of
a clean page fault.

Signed-off-by: Ralph E. Bellofatto <ralphbel@us.ibm.com>
Signed-off-by: Benjamin Krill <ben@codiert.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Krill 2014-02-27 15:49:21 +01:00 • committed by Benjamin Herrenschmidt
commit 60b962239a
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/mm/tlb_low_64e.S
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@ -1091,7 +1091,8 @@ tlb_load_linear:
ld r11,PACATOC(r13)
ld r11,linear_map_top@got(r11)
ld r10,0(r11)
cmpld cr0,r10,r16
tovirt(10,10)
cmpld cr0,r16,r10
bge tlb_load_linear_fault
/* MAS1 need whole new setup. */