[PATCH] arm64: Disable EL2 traps for BRBE instructions executed in EL1

[Anshuman Khandual]

On 3/25/23 06:07, kernel test robot wrote:
> All errors (new ones prefixed by >>):
> 
>>> <instantiation>:36:14: error: expected compatible register or logical immediate
>     orr x0, x0, #HFGITR_EL2_nBRBIALL
>                 ^
>    <instantiation>:10:2: note: while in macro instantiation
>     __init_el2_fgt
>     ^
>    arch/arm64/kernel/head.S:577:2: note: while in macro instantiation
>     init_el2_state
>     ^
>    <instantiation>:37:14: error: expected compatible register or logical immediate
>     orr x0, x0, #HFGITR_EL2_nBRBINJ
>                 ^
>    <instantiation>:10:2: note: while in macro instantiation
>     __init_el2_fgt
>     ^
>    arch/arm64/kernel/head.S:577:2: note: while in macro instantiation
>     init_el2_state
>     ^

I guess these build errors are caused by unavailability of the pre-requisite
patches from Mark Brown, in this test environment ?

https://lore.kernel.org/all/20230306-arm64-fgt-reg-gen-v3-0-decba93cbaab@kernel.org/