Re: [PATCH v2 6/7] target/arm: Implement v8.3 FPAC and FPACCOMBINE

[Richard Henderson <richard.henderson@linaro.org>]

On 2/22/23 09:35, Aaron Lindsay wrote:
> +static G_NORETURN
> +void pauth_fail_exception(CPUARMState *env, bool data, int keynumber, uintptr_t ra)
> +{
> +    int target_el = arm_current_el(env);
> +    if (target_el == 0) {
> +        uint64_t hcr = arm_hcr_el2_eff(env);
> +        if (arm_is_el2_enabled(env) && (hcr & HCR_TGE))
> +            target_el = 2;
> +        else
> +            target_el = 1;
> +    }
> +
> +    raise_exception_ra(env, EXCP_UDEF, syn_pacfail(data, keynumber), target_el, ra);

Use exception_target_el(), no need to check TGE here.

> @@ -406,6 +421,16 @@ static uint64_t pauth_auth(CPUARMState *env, uint64_t ptr, uint64_t modifier,
>           uint64_t xor_mask = MAKE_64BIT_MASK(bot_bit, top_bit - bot_bit + 1) &
>               ~MAKE_64BIT_MASK(55, 1);
>           result = ((ptr ^ pac) & xor_mask) | (ptr & ~xor_mask);
> +        if (cpu_isar_feature(aa64_fpac_combine, env_archcpu(env)) ||
> +                (cpu_isar_feature(aa64_fpac, env_archcpu(env)) &&
> +                 !is_combined)) {

Indentation is off.

> +    int error_code = ((data ? 1 : 0) << 1) | (keynumber);

'? 1 : 0' is not required.


r~