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Re: [PATCH v5 19/22] tests/tcg/aarch64: add SVE iotcl test


From: Richard Henderson
Subject: Re: [PATCH v5 19/22] tests/tcg/aarch64: add SVE iotcl test
Date: Wed, 15 Jan 2020 12:46:26 -1000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2

On 1/14/20 5:09 AM, Alex Bennée wrote:
> +int main(int argc, char **argv)
> +{
> +    unsigned int sve_feature = (get_cpu_reg(ID_AA64PFR0_EL1) >> 32) & 0xf;
> +    /* Exit early if we don't support SVE at all */
> +    if (sve_feature == 0x1) {
> +        /* we also need to probe for the ioctl support */
> +        if (getauxval(AT_HWCAP) & HWCAP_SVE) {

You should only probe hwcap.


r!



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