[PATCH v2 0/6] Exception handling in HYP mode on ARMv7-A

[Tom Rini]

On Wed, Nov 24, 2021 at 02:39:55PM -0500, Jim Posen wrote:

> Currently, when U-Boot is running in hypervisor mode on ARMv7-A CPUs
> with virtualization extensions, the exception handling does not work.
> A couple things need to change which are detailed in my earlier
> message to the u-boot mailing list with the subject "Exception
> handling in HYP mode on ARMv7-A".
> 
> I have verified that this patch series works on the ODroid XU4 and
> the Raspberry Pi 3B in Aarch32 mode when running in hypervisor mode.
> One simple way to verify is by running the miscellaneous "exception"
> command (CMD_EXCEPTION).
> 
> This can be tested with QEMU now. Configure with qemu_arm_defconfig
> and add CMD_EXCEPTION and QEMU_ARM_32BIT_HAS_VIRT. Then run
> 
> qemu-system-arm \
>     -machine virt,virtualization \
>                 -nographic -serial mon:stdio \
>                 -bios u-boot.bin
> 
> U-Boot 2021.10-...
> ...
> => exception undefined
> 
> Changes in v2:
> - Fix CP15 register written to in start.S
> - Check processor mode as HVBAR register is only accessible in HYP
>         mode
> - Add QEMU config option for ARM32 with virtualization extensions
> 
> Jim Posen (6):
>   Compile for ARMv7-A with virtualization extensions
>   Hypervisor mode interrupt vector table
>   Set HVBAR register correctly
>   Remove dead code
>   Fix PC adjustment logic in exception handlers
>   Config to target QEMU virt machine with virtualization

Hey, sorry for the delay.  Can you please rebase this to current master?
It no longer builds on say am335x_evm, thanks!

-- 
Tom
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