On 6/2/23 14:43, Zhuojia Shen wrote:
Accessing EL0-accessible Debug Communication Channel (DCC) registers in
user mode emulation is currently enabled. However, it does not match
Linux behavior as Linux sets MDSCR_EL1.TDCC on startup to disable EL0
access to DCC (see __cpu_setup() in arch/arm64/mm/proc.S).
This patch fixes access_tdcc() to check MDSCR_EL1.TDCC for EL0 and sets
MDSCR_EL1.TDCC for user mode emulation to match Linux.
Signed-off-by: Zhuojia Shen <chaosdefinit...@hotmail.com>
It would be nice to define the fields of MDSCR properly but either way,
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
r~
