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5e4ba617c1
linux/arch/arm
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Russell King 5e4ba617c1 ARM: VFP: fix emulation of second VFP instruction 
Martin Storsjö reports that the sequence:

        ee312ac1        vsub.f32        s4, s3, s2
        ee702ac0        vsub.f32        s5, s1, s0
        e59f0028        ldr             r0, [pc, #40]
        ee111a90        vmov            r1, s3

on Raspberry Pi (implementor 41 architecture 1 part 20 variant b rev 5)
where s3 is a denormal and s2 is zero results in incorrect behaviour -
the instruction "vsub.f32 s5, s1, s0" is not executed:

        VFP: bounce: trigger ee111a90 fpexc d0000780
        VFP: emulate: INST=0xee312ac1 SCR=0x00000000
        ...

As we can see, the instruction triggering the exception is the "vmov"
instruction, and we emulate the "vsub.f32 s4, s3, s2" but fail to
properly take account of the FPEXC_FP2V flag in FPEXC.  This is because
the test for the second instruction register being valid is bogus, and
will always skip emulation of the second instruction.

Cc: <stable@vger.kernel.org>
Reported-by: Martin Storsjö <martin@martin.st>
Tested-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-02-25 16:09:12 +00:00
..
boot ARM: 7656/1: uImage: Error out on build of multiplatform without LOADADDR 2013-02-23 14:06:27 +00:00
common ARM: GIC: fix GIC cpumask initialization 2013-02-08 10:17:22 +00:00
configs ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfig 2013-01-23 10:39:58 +01:00
crypto
include ARM: 7654/1: Preserve L_PTE_VALID in pte_modify() 2013-02-21 13:25:37 +00:00
kernel ARM: 7653/2: do not scale loops_per_jiffy when using a constant delay clock 2013-02-21 13:25:36 +00:00
lib ARM: 7653/2: do not scale loops_per_jiffy when using a constant delay clock 2013-02-21 13:25:36 +00:00
mach-at91 ARM: at91: rm9200: remake the BGA as default version 2013-01-23 10:31:14 +01:00
mach-bcm Add support for generic BCM SoC chipsets 2012-11-19 22:39:07 -08:00
mach-bcm2835 ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
mach-clps711x ARM: clps711x: Rename board files to match functionality 2012-11-21 09:57:46 -08:00
mach-cns3xxx ARM: arm-soc: Non-critical bug fixes 2012-12-12 11:32:16 -08:00
mach-davinci ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-dove ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-ebsa110
mach-ep93xx ARM: ep93xx: properly wait for UART FIFO to be empty 2012-12-12 11:22:56 +11:00
mach-exynos pinctrl: exynos: change PINCTRL_EXYNOS option 2013-02-05 15:27:39 +01:00
mach-footbridge
mach-gemini
mach-h720x
mach-highbank ARM: highbank: save and restore L2 cache and GIC on suspend 2013-01-07 21:08:26 -08:00
mach-imx ARM: arm-soc: Fixes for 3.8-rc, take 2 2013-01-24 12:42:50 -08:00
mach-integrator ARM: integrator: move syscon remap for AP PCIv3 2013-01-11 11:25:22 -08:00
mach-iop13xx ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-iop32x
mach-iop33x
mach-ixp4xx Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-12-12 11:30:02 -08:00
mach-kirkwood Merge branch 'v3.8-samsung-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes 2013-01-16 19:58:58 -08:00
mach-ks8695 ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-l7200/include/mach
mach-lpc32xx ARM: LPC32xx: Add the motor PWM clock 2012-11-12 11:27:40 +01:00
mach-mmp ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-msm ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-mv78xx0 ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-mvebu arm: mvebu: Fix compile for multiplatform when ARMv6 is selected 2013-01-11 12:17:58 -08:00
mach-mxs Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-12-18 09:58:09 -08:00
mach-netx treewide: Fix typos in various drivers 2012-12-03 11:05:04 +01:00
mach-nomadik ARM: nomadik: bump the IRQ numbers again 2013-01-03 23:42:07 +01:00
mach-omap1 ARM: arm-soc fixes for 3.8-rc 2013-01-08 18:53:56 -08:00
mach-omap2 ARM: OMAP2+: omap4-panda: add UART2 muxing for WiLink shared transport 2013-01-21 10:39:53 -08:00
mach-orion5x ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-picoxcell
mach-prima2 ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-pxa Merge remote-tracking branch 'asoc/fix/pxa' into tmp 2013-01-10 12:22:16 +00:00
mach-realview ARM: realview: ensure that we have sufficient IRQs available 2013-02-08 10:23:32 +00:00
mach-rpc
mach-s3c24xx ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-s3c64xx ARM: S3C64XX: Fix up IRQ mapping for balblair on Cragganmore 2013-01-16 15:49:53 -08:00
mach-s3c2410
mach-s3c2412
mach-s3c2440
mach-s5p64x0 ARM: S5P64X0: Add I2S clkdev support 2012-12-19 09:49:29 -08:00
mach-s5pc100 ARM: S5PC100: Add I2S clkdev support 2012-12-19 09:49:29 -08:00
mach-s5pv210 ARM: S5PV210: Avoid passing the clks through platform data 2012-12-19 09:49:29 -08:00
mach-sa1100 ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-shark
mach-shmobile fbdev changes for 3.8: 2012-12-15 13:03:48 -08:00
mach-socfpga ARM: socfpga: mark secondary_trampoline as cpuinit 2012-11-06 23:14:49 +01:00
mach-spear3xx ARM: SPEAr3xx: Shirq: Move shirq controller out of plat/ 2012-11-26 16:55:33 +05:30
mach-spear6xx
mach-spear13xx ARM: SPEAr1310: Fix AUXDATA for compact flash controller 2012-11-26 16:55:31 +05:30
mach-sunxi sunxi: Change the machine compatible string. 2012-12-23 18:20:15 +01:00
mach-tegra ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-u300 ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
mach-ux500 ARM: ux500: add pinctrl address resources 2012-12-26 01:59:54 +01:00
mach-versatile ARM: 7610/1: versatile: bump IRQ numbers 2013-01-02 10:35:06 +00:00
mach-vexpress ARM: 7609/1: disable errata work-arounds which access secure registers 2013-01-02 10:35:05 +00:00
mach-vt8500 ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00
mach-w90x900
mach-zynq ARM: zynq: Remove all unused mach headers 2012-11-21 10:52:21 +01:00
mm ARM: DMA mapping: fix bad atomic test 2013-02-08 10:25:23 +00:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-12-12 18:07:07 -08:00
nwfpe
oprofile
plat-iop
plat-omap ARM: arm-soc fixes for 3.8-rc 2013-01-08 18:53:56 -08:00
plat-orion ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
plat-pxa ARM: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
plat-s3c24xx Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
plat-samsung ARM: arm-soc fixes for 3.8-rc 2013-01-08 18:53:56 -08:00
plat-spear ARM: SPEAr3xx: Shirq: Move shirq controller out of plat/ 2012-11-26 16:55:33 +05:30
plat-versatile ARM: vexpress: extend the MPIDR range used for pen release check 2013-01-24 12:19:23 +00:00
tools ARM: boot: Fix usage of kecho 2012-11-12 23:22:54 +01:00
vfp ARM: VFP: fix emulation of second VFP instruction 2013-02-25 16:09:12 +00:00
xen Features: 2012-12-13 14:29:16 -08:00
Kconfig Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-01-09 08:58:57 -08:00
Kconfig-nommu
Kconfig.debug ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00
Makefile ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00