Commit 60b96223 authored Feb 27, 2014 by Benjamin Krill Committed by Benjamin Herrenschmidt Mar 07, 2014

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



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>

parent eb3b80f6

arch/powerpc/mm/tlb_low_64e.S

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1091,7 +1091,8 @@ tlb_load_linear:
	ld r11,PACATOC(r13)		ld r11,PACATOC(r13)
	ld r11,linear_map_top@got(r11)		ld r11,linear_map_top@got(r11)
	ld r10,0(r11)		ld r10,0(r11)
	cmpld cr0,r10,r16		tovirt(10,10)
			cmpld cr0,r16,r10
	bge tlb_load_linear_fault		bge tlb_load_linear_fault

	/* MAS1 need whole new setup. */		/* MAS1 need whole new setup. */