Re: [PATCH v3 12/21] linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE

[Peter Maydell]

On Fri, 15 Jan 2021 at 22:47, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> This is the prctl bit that controls whether syscalls accept tagged
> addresses.  See Documentation/arm64/tagged-address-abi.rst in the
> linux kernel.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  linux-user/aarch64/target_syscall.h |  4 ++++
>  target/arm/cpu-param.h              |  3 +++
>  target/arm/cpu.h                    | 23 +++++++++++++++++++++++
>  linux-user/syscall.c                | 25 +++++++++++++++++++++++++
>  target/arm/cpu.c                    |  3 +++
>  5 files changed, 58 insertions(+)
>
> diff --git a/linux-user/aarch64/target_syscall.h 
> b/linux-user/aarch64/target_syscall.h
> index 3194e6b009..820601dfcc 100644
> --- a/linux-user/aarch64/target_syscall.h
> +++ b/linux-user/aarch64/target_syscall.h
> @@ -30,4 +30,8 @@ struct target_pt_regs {
>  # define TARGET_PR_PAC_APDBKEY   (1 << 3)
>  # define TARGET_PR_PAC_APGAKEY   (1 << 4)
>
> +#define TARGET_PR_SET_TAGGED_ADDR_CTRL 55
> +#define TARGET_PR_GET_TAGGED_ADDR_CTRL 56
> +# define TARGET_PR_TAGGED_ADDR_ENABLE  (1UL << 0)

Stray extra space.

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

thanks
-- PMM