> From: Heinrich Schuchardt <xypron.g...@gmx.de> > Date: Sun, 23 Sep 2018 05:38:29 +0200 > > On 09/23/2018 04:39 AM, Jonathan Gray wrote: > > On Sun, Sep 23, 2018 at 01:30:11AM +0200, Heinrich Schuchardt wrote: > >> On 09/01/2018 12:21 PM, Alexander Graf wrote: > >>> > >>> > >>> On 31.08.18 20:45, Mark Kettenis wrote: > >>>>> From: Heinrich Schuchardt <xypron.g...@gmx.de> > >>>>> Date: Fri, 31 Aug 2018 19:37:25 +0200 > >>>>> > >>>>> On 06/14/2018 12:41 AM, Mark Kettenis wrote: > >>>>>> If desired (and possible) switch into HYP mode or non-secure SVC mode > >>>>>> before calling the entry point of an EFI application. This allows > >>>>>> U-Boot to provide a usable PSCI implementation and makes it possible > >>>>>> to boot kernels into hypervisor mode using an EFI bootloader. > >>>>>> > >>>>>> Based on diffs from Heinrich Schuchardt and Alexander Graf. > >>>>>> > >>>>>> Signed-off-by: Mark Kettenis <kette...@openbsd.org> > >>>>> > >>>>> bootefi hello fails on vexpress_ca15_tc2_defconfig when run on qemu with > >>>>> > >>>>> QEMU_AUDIO_DRV=none qemu-system-arm \ > >>>>> -M vexpress-a15 -cpu cortex-a15 -kernel u-boot \ > >>>>> -net user -net nic,model=lan9118 \ > >>>>> -m 1024M --nographic \ > >>>>> -drive if=sd,file=img.vexpress,media=disk,format=raw > >>>> > >>>> Works for me with: > >>>> > >>>> $ qemu-system-arm --version > >>>> QEMU emulator version 3.0.0 > >>>> Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers > >>>> > >>>> => bootefi hello > >>>> Scanning disks on mmc... > >>>> MMC Device 1 not found > >>>> MMC Device 2 not found > >>>> MMC Device 3 not found > >>>> Found 3 disks > >>>> WARNING: booting without device tree > >>>> ## Starting EFI application at a0008000 ... > >>>> WARNING: using memory device/image path, this may confuse some payloads! > >>>> Hello, world! > >>>> Running on UEFI 2.7 > >>>> Have SMBIOS table > >>>> Load options: <none> > >>>> ## Application terminated, r = 0 > >>>> > >>>> That is with CONFIG_CMD_BOOTEFI_HELLO=y added to the > >>>> vexpress_ca15_tc2_defconfig of course. > >>>> > >>>>> Bisection points to > >>>>> efi_loader: ARM: run EFI payloads non-secure > >>>>> commit dc500c369486fbe04000fd325c46bb309e4a1827 > >>>> > >>>> That suggests an issue with emulation if the mode switching > >>>> instructions or HYP support in qemu. Or a toolchain issue of course. > >>> > >>> Or maybe Heinrich's QEMU version starts up in a different EL mode? > >>> > >>> > >>> Alex > >>> _______________________________________________ > >>> U-Boot mailing list > >>> U-Boot@lists.denx.de > >>> https://lists.denx.de/listinfo/u-boot > >>> > >> The problem is reproducible with qemu 3.0.0. > >> > >> git reset --hard dc500c369486fbe04000fd325c46bb309e4a1827 > >> > >> --- a/lib/efi_loader/Kconfig > >> +++ b/lib/efi_loader/Kconfig > >> @@ -2,7 +2,6 @@ config EFI_LOADER > >> bool "Support running EFI Applications in U-Boot" > >> depends on (ARM || X86 || RISCV) && OF_LIBFDT > >> # We do not support bootefi booting ARMv7 in non-secure mode > >> - depends on !ARMV7_NONSEC > >> # We need EFI_STUB_64BIT to be set on x86_64 with EFI_STUB > >> depends on !EFI_STUB || !X86_64 || EFI_STUB_64BIT > >> # We need EFI_STUB_32BIT to be set on x86_32 with EFI_STUB > >> > >> make vexpress_ca15_tc2_defconfig > >> > >> Set CONFIG_CMD_BOOTEFI_HELLO=y > >> > >> export CROSS_COMPILE=arm-linux-gnueabihf- > >> make > >> > >> QEMU_AUDIO_DRV=none qemu-system-arm \ > >> -M vexpress-a15 -cpu cortex-a15 -kernel u-boot \ > >> -netdev \ > >> user,id=net0,tftp=tftp,net=192.168.76.0/24,dhcpstart=192.168.76.9 \ > >> -net nic,model=lan9118,netdev=net0 \ > >> -m 1024M --nographic \ > >> -drive if=sd,file=img.vexpress,media=disk,format=raw > >> > >> => bootefi hello > >> Scanning disks on mmc... > >> MMC Device 1 not found > >> MMC Device 2 not found > >> MMC Device 3 not found > >> Found 2 disks > >> WARNING: booting without device tree > >> ## Starting EFI application at a0008000 ... > >> WARNING: using memory device/image path, this may confuse some payloads! > >> > >> No further output after this line :( > > > > bootefi hello works fine with 2018.09 and qemu 3.0 here > > > > gmake PYTHON=python2.7 CROSS_COMPILE=arm-none-eabi- > > vexpress_ca15_tc2_defconfig O=build/vexpress > > gmake PYTHON=python2.7 CROSS_COMPILE=arm-none-eabi- O=build/vexpress > > menuconfig > > gmake PYTHON=python2.7 CROSS_COMPILE=arm-none-eabi- O=build/vexpress all > > > > $ arm-none-eabi-gcc -v > > Using built-in specs. > > COLLECT_GCC=arm-none-eabi-gcc > > COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/arm-none-eabi/6.3.1/lto-wrapper > > Target: arm-none-eabi > > Configured with: > > /usr/obj/ports/arm-none-eabi-gcc-linaro-6.3.2017.02-arm/gcc-linaro-6.3-2017.02/configure > > --enable-languages=c,c++ --enable-multilib --enable-interwork > > --with-gmp=/usr/local --with-newlib --disable-lto --enable-cpp > > --target=arm-none-eabi --disable-shared --disable-nls --disable-werror > > --prefix=/usr/local --sysconfdir=/etc --mandir=/usr/local/man > > --infodir=/usr/local/info --localstatedir=/var --disable-silent-rules > > --disable-gtk-doc > > Thread model: single > > gcc version 6.3.1 20170109 (Linaro GCC 6.3-2017.02) > > > > $ qemu-system-arm --version > > QEMU emulator version 3.0.0 > > Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers > > > > qemu-system-arm -m 1024 -M vexpress-a15 -kernel build/vexpress/u-boot > > -serial stdio > > > > U-Boot 2018.09-00001-g2a9fbd55c3 (Sep 23 2018 - 12:24:33 +1000) > > > > DRAM: 1 GiB > > WARNING: Caches not enabled > > Flash: 128 MiB > > MMC: MMC: 0 > > *** Warning - bad CRC, using default environment > > > > In: serial > > Out: serial > > Err: serial > > Net: smc911x-0 > > Hit any key to stop autoboot: 0 > > => bootefi hellopi > > Scanning disks on mmc... > > Card did not respond to voltage select! > > MMC Device 1 not found > > MMC Device 2 not found > > MMC Device 3 not found > > Found 0 disks > > WARNING: booting without device tree > > ## Starting EFI application at a0008000 ... > > WARNING: using memory device/image path, this may confuse some payloads! > > Hello, world! > > Running on UEFI 2.7 > > Have SMBIOS table > > Load options: <none> > > ## Application terminated, r = 0 > > => > > > The difference seems to be in the compiler: > With the recipe above arm-none-eabi-gcc 6.3.1 is working but > arm-linux-gnueabihf-gcc 8.2.0 (as supplied with Debian Buster) is still > failing.
Are you sure it's the compiler that causes the breakage and not the linker? Apparently there was a recent change in binutils that affects sectipn alignment. See commit 792b204798453d96b00e0817e8472c19455e92a2 for a workaround. It wouldn't surprise me more tweaks like that are necessary. > Errors like out of bound accesses may become apparent or disappearing > depending of generated addresses. So it may be by chance that we do not > see the error with gcc 6.3.1. This does not imply that the code is correct. Everything is possible. But there is very little C code involved here. It's mostly scary assembly code... Cheers, Mark _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
