[U-Boot] [PATCH v3 2/3] efi_loader: ARM: run EFI payloads non-secure

[Alexander Graf]

On 31.08.18 20:45, Mark Kettenis wrote:
>> From: Heinrich Schuchardt <xypron.glpk at 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 <kettenis at 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