1
linux/arch/powerpc
Li Yang 78e2e68a2b powerpc/fsl-booke: Fix InstructionTLBError execute permission check
In CONFIG_PTE_64BIT the PTE format has unique permission bits for user
and supervisor execute.  However on !CONFIG_PTE_64BIT we overload the
supervisor bit to imply user execute with _PAGE_USER set.  This allows
us to use the same permission check mask for user or supervisor code on
!CONFIG_PTE_64BIT.

However, on CONFIG_PTE_64BIT we map _PAGE_EXEC to _PAGE_BAP_UX so we
need a different permission mask based on the fault coming from a kernel
address or user space.

Without unique permission masks we see issues like the following with
modules:

Unable to handle kernel paging request for instruction fetch
Faulting instruction address: 0xf938d040
Oops: Kernel access of bad area, sig: 11 [#1]

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jin Qing <b24347@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-05-17 10:56:16 -05:00
..
boot powerpc/83xx: Add MCU LEDs support for MPC837xRDB and MPC8315RDB boards 2010-05-17 10:55:32 -05:00
configs Merge commit 'origin/master' into next 2010-05-07 11:29:25 +10:00
include/asm Merge commit 'origin/master' into next 2010-05-07 11:29:25 +10:00
kernel powerpc/fsl-booke: Fix InstructionTLBError execute permission check 2010-05-17 10:56:16 -05:00
kvm KVM: fix the handling of dirty bitmaps to avoid overflows 2010-04-20 13:06:55 +03:00
lib powerpc: Fix handling of strncmp with zero len 2010-04-07 18:00:39 +10:00
math-emu
mm Merge commit 'origin/master' into next 2010-05-07 11:29:25 +10:00
oprofile include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
platforms powerpc/8610: add probing for individual DMA channels, not just DMA controllers 2010-05-17 10:55:33 -05:00
sysdev powerpc: Add interrupt support to mpc8xxx_gpio 2010-05-17 10:48:28 -05:00
xmon powerpc: Mark some variables in the page fault path __read_mostly 2010-02-03 17:39:48 +11:00
Kconfig powerpc: Add kprobe-based event tracer 2010-04-07 18:11:43 +10:00
Kconfig.debug powerpc/cpumask: Add DEBUG_PER_CPU_MAPS option 2010-05-06 18:05:26 +10:00
Makefile powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE 2009-09-24 15:31:40 +10:00
relocs_check.pl powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE 2009-09-24 15:31:40 +10:00