android_kernel_xiaomi_sm8350/arch/ppc
David Gibson aa1cf632bd [POWERPC] Fix small race in 44x tlbie function
The 440 family of processors don't have a tlbie instruction.  So, we
implement TLB invalidates by explicitly searching the TLB with tlbsx.,
then clobbering the relevant entry, if any.  Unfortunately the PID for
the search needs to be stored in the MMUCR register, which is also
used by the TLB miss handler.  Interrupts were enabled in _tlbie(), so
an interrupt between loading the MMUCR and the tlbsx could cause
incorrect search results, and thus a failure to invalide TLB entries
which needed to be invalidated.

This fixes the problem in both arch/ppc and arch/powerpc by inhibiting
interrupts (even critical and debug interrupts) across the relevant
instructions.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-08-15 15:12:50 +10:00
..
4xx_io [POWERPC] Spelling fixes: arch/ppc/ 2007-05-12 11:32:49 +10:00
8xx_io [NET]: Kill eth_copy_and_sum(). 2007-07-10 22:08:12 -07:00
8260_io [NET]: Kill eth_copy_and_sum(). 2007-07-10 22:08:12 -07:00
amiga Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
boot [POWERPC] Spelling fixes: arch/ppc/ 2007-05-12 11:32:49 +10:00
configs Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION 2007-07-29 16:45:38 -07:00
kernel [POWERPC] Fix small race in 44x tlbie function 2007-08-15 15:12:50 +10:00
lib [POWERPC] User rheap from arch/powerpc/lib 2007-05-09 23:28:17 -05:00
mm mm: fault feedback #2 2007-07-19 10:04:41 -07:00
platforms serial: add early_serial_setup() back to header file 2007-07-18 08:38:22 -07:00
syslib [WATCHDOG] mv64x60_wdt: set up platform_device in platform code 2007-07-24 18:56:35 +00:00
xmon [POWERPC] PPC: Use ARRAY_SIZE macro when appropriate 2007-02-08 16:08:25 +11:00
.gitignore [POWERPC] Add files build to .gitignore 2006-12-04 20:41:29 +11:00
Kconfig PCI: Only build PCI syscalls on architectures that want them 2007-07-11 16:02:13 -07:00
Kconfig.debug ppc: Remove CHRP, POWER3 and POWER4 support from arch/ppc 2006-03-28 10:22:10 +11:00
Makefile Merge branch '85xx' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc 2006-03-28 17:03:19 +11:00