linux/arch/powerpc
Aneesh Kumar K.V eda8eebdd1 powerpc/mm: Fix hash computation function
The ASM version of hash computation function was truncating the upper bit.
Make the ASM version similar to hpt_hash function. Remove masking vsid bits.
Without this patch, we observed hang during bootup due to not satisfying page
fault request correctly. The fault handler used wrong hash values to update
the HPTE. Hence we kept looping with page fault.

hash_page(ea=000001003e260008, access=203, trap=300 ip=3fff91787134 dsisr 42000000
The computed value of hash 000000000f22f390
update: avpnv=4003e46054003e00, hash=000000000722f390, f=80000006, psize: 2 ...

BenH: The over-masking has been there for ever but only hurts with the
new 64T support introduced in 3.7

Reported-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tested-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.7]
2013-02-04 15:15:08 +11:00
..
boot Merge remote-tracking branch 'agust/next' into next 2012-12-18 10:22:27 +11:00
configs powerpc/pseries: Double NR_CPUS in defconfig 2012-11-15 12:59:17 +11:00
include Merge git://git.kernel.org/pub/scm/virt/kvm/kvm 2013-01-10 09:05:18 -08:00
kernel powerpc: Max next_tb to prevent from replaying timer interrupt 2013-01-29 10:18:16 +11:00
kvm KVM: PPC: Emulate dcbf 2013-01-18 00:40:49 +01:00
lib powerpc: Fix VMX fix for memcpy case 2012-10-04 18:02:43 +10:00
math-emu
mm powerpc/mm: Fix hash computation function 2013-02-04 15:15:08 +11:00
net PPC: net: bpf_jit_comp: add VLAN instructions for BPF JIT 2012-11-17 22:12:47 -05:00
oprofile powerpc/oprofile: Fix error in oprofile power7_marked_instr_event() function 2013-01-29 10:18:14 +11:00
perf powerpc/perf: Add missing L2 constraint handling in Power7 PMU 2012-11-15 13:00:36 +11:00
platforms powerpc/pasemi: Fix crash on reboot 2013-01-29 10:18:14 +11:00
sysdev POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
xmon powerpc/xmon: Fallback to printk() in xmon_printf() if udbg is not setup 2012-11-15 13:00:02 +11:00
Kconfig Bury the conditionals from kernel_thread/kernel_execve series 2012-12-19 18:07:38 -05:00
Kconfig.debug powerpc: IOMMU fault injection 2012-07-10 19:18:59 +10:00
Makefile powerpc: dtc is required to build dtb files 2012-11-15 12:59:21 +11:00
relocs_check.pl