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ef1c47afc0
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Paul Burton ef1c47afc0 MIPS: Clear upper bits of FP registers on emulator writes 
The upper bits of an FP register are architecturally defined as
unpredictable following an instructions which only writes the lower
bits. The prior behaviour of the kernel is to leave them unmodified.
This patch modifies that to clear the upper bits to zero. This is what
the MSA architecture reference manual specifies should happen for its
wider registers and is still permissible for scalar FP instructions
given the bits unpredictability there.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: sergei.shtylyov@cogentembedded.com
Patchwork: https://patchwork.linux-mips.org/patch/6435/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-26 23:09:10 +01:00
..
alchemy MIPS: Alchemy: Fix DB1100 GPIO registration 2014-02-04 13:18:02 +01:00
ar7 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00
ath79 mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
bcm47xx MIPS: Add 1074K CPU support explicitly. 2014-03-06 21:25:21 +01:00
bcm63xx mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
boot mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
cavium-octeon mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
cobalt MIPS: Cobalt: Move to 8250/16550 serial early printk driver 2013-10-29 21:24:38 +01:00
configs MIPS: Kill CONFIG_MTD_PARTITIONS 2014-01-24 22:39:45 +01:00
dec DEC: Whitespace cleanup 2013-10-29 21:24:44 +01:00
emma MIPS: Remove panic_timeout settings 2013-11-26 12:12:27 +01:00
fw mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
include MIPS: Update outdated comment 2014-03-26 23:09:09 +01:00
jazz Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-03-02 07:44:16 -08:00
jz4740 mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
kernel MIPS: Replace hardcoded 32 with NUM_FPU_REGS in ptrace 2014-03-26 23:09:09 +01:00
kvm mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
lantiq mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
lasat mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
lib mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
loongson mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
loongson1 MIPS: Idle: Consolidate all declarations in <asm/idle.h>. 2013-05-22 01:34:27 +02:00
math-emu MIPS: Clear upper bits of FP registers on emulator writes 2014-03-26 23:09:10 +01:00
mm MIPS: Coherent Processing System SMP implementation 2014-03-26 23:00:12 +01:00
mti-malta MIPS: Malta: Allow use of MIPS CPS SMP implementation 2014-03-26 23:09:07 +01:00
mti-sead3 mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
netlogic Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00
oprofile MIPS: Add 1074K CPU support explicitly. 2014-03-06 21:25:21 +01:00
pci MIPS: Malta: Make use of generic CM support 2014-03-26 23:09:06 +01:00
pmcs-msp71xx MIPS: introduce MIPS_L1_CACHE_SHIFT_<N> 2014-01-24 22:39:55 +01:00
pnx833x MIPS: PNX833x: PNX8335_PCI_ETHERNET_INT depends on CONFIG_SOC_PNX8335 2013-08-05 13:34:22 +02:00
power MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
ralink Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00
rb532 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sgi-ip22 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sgi-ip27 mips: delete non-required instances of include <linux/init.h> 2014-01-24 22:39:56 +01:00
sgi-ip32 MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
sibyte MIPS: Remove panic_timeout settings 2013-11-26 12:12:27 +01:00
sni MIPS: Cleanup CP0 PRId and CP1 FPIR register access masks 2013-09-18 20:25:19 +02:00
txx9 MIPS: TXx9: Fix build error if CONFIG_TOSHIBA_JMR3927 is not selected 2013-09-03 15:30:50 +02:00
vr41xx MIPS: Idle: Consolidate all declarations in <asm/idle.h>. 2013-05-22 01:34:27 +02:00
Kbuild KVM/MIPS32: Infrastructure/build files. 2013-05-08 03:55:34 +02:00
Kbuild.platforms MIPS: PowerTV: Remove support code. 2013-10-29 21:25:17 +01:00
Kconfig MIPS: Select HAVE_ARCH_SECCOMP_FILTER 2014-03-26 23:09:09 +01:00
Kconfig.debug MIPS: Add 8250/16550 serial early printk driver 2013-10-29 21:24:36 +01:00
Makefile Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00