[PATCH v5 11/12] KVM: selftests: arm64: Determine max ipa size per-page size

[Oliver Upton]

On Thu, Nov 16, 2023 at 02:29:30PM +0000, Ryan Roberts wrote:

[...]

> @@ -518,9 +530,14 @@ void aarch64_get_supported_page_sizes(uint32_t ipa,
>  	err = ioctl(vcpu_fd, KVM_GET_ONE_REG, &reg);
>  	TEST_ASSERT(err == 0, KVM_IOCTL_ERROR(KVM_GET_ONE_REG, vcpu_fd));
>  
> -	*ps4k = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN4), val) != 0xf;
> -	*ps64k = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN64), val) == 0;
> -	*ps16k = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN16), val) != 0;
> +	gran = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN4), val);
> +	*ipa4k = max_ipa_for_page_size(ipa, gran, 0xf, 1);
> +
> +	gran = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN64), val);
> +	*ipa64k = max_ipa_for_page_size(ipa, gran, 0xf, 0);
> +
> +	gran = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_TGRAN16), val);
> +	*ipa16k = max_ipa_for_page_size(ipa, gran, 0, 2);

Oh, also: we have the generated system register definitions available in
KVM selftests at this point. It'd be a good idea to move away from
'magic' values and use the enumerations instead.

-- 
Thanks,
Oliver