[OpenWrt-Devel] [PATCH] mvebu: cortexa9:, tegra: correct cpu subtype

[mail at adrianschmutzler.de]

Hi,

please split that into one patch per target.

Best

Adrian

> -----Original Message-----
> From: openwrt-devel [mailto:openwrt-devel-bounces at lists.openwrt.org]
> On Behalf Of Tomasz Maciej Nowak
> Sent: Mittwoch, 18. März 2020 16:14
> To: openwrt-devel at lists.openwrt.org
> Subject: [OpenWrt-Devel] [PATCH] mvebu: cortexa9:, tegra: correct cpu
> subtype
> 
> Armada 370 and Tegra 2 processors have only 16 double-precision registers.
> The change introduced by 8dcc1087602e ("toolchain: ARM: Fix toolchain
> compilation for gcc 8.x") switched accidentally the toolchain for mvebu
> cortexa9 subtarget and tegra target to cpu type with 32 double-precision
> registers. This stems from gcc defaults which assume "vfpv3-d32" if only
> "vfpv3" as mfpu is specified. That change resulted in unusable image, in
> which kernel will kill userspace as soon as causing "Illegal instruction".
> 
> Ref: https://forum.openwrt.org/t/gcc-was-broken-on-mvebu-armada-370-
> device-after-commit-on-2019-03-25/43272
> Fixes: 8dcc1087602e ("toolchain: ARM: Fix toolchain compilation for gcc 8.x")
> Signed-off-by: Tomasz Maciej Nowak <tomek_n at o2.pl>
> ---
>  target/linux/mvebu/cortexa9/target.mk | 2 +-
>  target/linux/tegra/Makefile           | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/target/linux/mvebu/cortexa9/target.mk
> b/target/linux/mvebu/cortexa9/target.mk
> index 2a75599bc9a3..cdd4d86e4936 100644
> --- a/target/linux/mvebu/cortexa9/target.mk
> +++ b/target/linux/mvebu/cortexa9/target.mk
> @@ -10,5 +10,5 @@ include $(TOPDIR)/rules.mk  ARCH:=arm
> BOARDNAME:=Marvell Armada 37x/38x/XP
>  CPU_TYPE:=cortex-a9
> -CPU_SUBTYPE:=vfpv3
> +CPU_SUBTYPE:=vfpv3-d16
>  KERNELNAME:=zImage dtbs
> diff --git a/target/linux/tegra/Makefile b/target/linux/tegra/Makefile index
> 0b48fc16baa2..5dd4d439849e 100644
> --- a/target/linux/tegra/Makefile
> +++ b/target/linux/tegra/Makefile
> @@ -11,7 +11,7 @@ BOARD := tegra
>  BOARDNAME := NVIDIA Tegra
>  FEATURES := audio boot-part display ext4 fpu gpio pci pcie rootfs-part rtc
> squashfs usb  CPU_TYPE := cortex-a9 -CPU_SUBTYPE := vfpv3
> +CPU_SUBTYPE := vfpv3-d16
> 
>  KERNEL_PATCHVER := 5.4
>  KERNEL_TESTING_PATCHVER := 5.4
> --
> 2.25.1
> 
> 
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> openwrt-devel at lists.openwrt.org
> https://lists.openwrt.org/mailman/listinfo/openwrt-devel
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