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| author | Zhuojia Shen <chaosdefinition@hotmail.com> | 2023-06-06 10:19:40 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2023-06-06 10:19:40 +0100 |
| commit | f9ac778898cb28307e0f91421aba34d43c34b679 (patch) | |
| tree | bb19b404245559a155a6269198417c6dd633250b /.gitlab | |
| parent | c81e4ab370e858550852b052f689a0a721b879d4 (diff) | |
target/arm: trap DCC access in user mode emulationpull-target-arm-20230606
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 <chaosdefinition@hotmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: DS7PR12MB630905198DD8E69F6817544CAC4EA@DS7PR12MB6309.namprd12.prod.outlook.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to '.gitlab')
0 files changed, 0 insertions, 0 deletions