Re: [PATCH v3 13/21] linux-user/aarch64: Implement PR_MTE_TCF and PR_MTE_TAG

[Peter Maydell]

On Fri, 15 Jan 2021 at 22:47, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> These prctl fields are required for the function of MTE.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  linux-user/aarch64/target_syscall.h |  9 ++++++
>  linux-user/syscall.c                | 44 +++++++++++++++++++++++++++++
>  2 files changed, 53 insertions(+)
>
> diff --git a/linux-user/aarch64/target_syscall.h 
> b/linux-user/aarch64/target_syscall.h
> index 820601dfcc..76f6c3391d 100644
> --- a/linux-user/aarch64/target_syscall.h
> +++ b/linux-user/aarch64/target_syscall.h
> @@ -33,5 +33,14 @@ struct target_pt_regs {
>  #define TARGET_PR_SET_TAGGED_ADDR_CTRL 55
>  #define TARGET_PR_GET_TAGGED_ADDR_CTRL 56
>  # define TARGET_PR_TAGGED_ADDR_ENABLE  (1UL << 0)
> +/* MTE tag check fault modes */
> +# define TARGET_PR_MTE_TCF_SHIFT       1
> +# define TARGET_PR_MTE_TCF_NONE        (0UL << TARGET_PR_MTE_TCF_SHIFT)
> +# define TARGET_PR_MTE_TCF_SYNC        (1UL << TARGET_PR_MTE_TCF_SHIFT)
> +# define TARGET_PR_MTE_TCF_ASYNC       (2UL << TARGET_PR_MTE_TCF_SHIFT)
> +# define TARGET_PR_MTE_TCF_MASK        (3UL << TARGET_PR_MTE_TCF_SHIFT)
> +/* MTE tag inclusion mask */
> +# define TARGET_PR_MTE_TAG_SHIFT       3
> +# define TARGET_PR_MTE_TAG_MASK        (0xffffUL << TARGET_PR_MTE_TAG_SHIFT)

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM