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Date:   Thu, 19 Oct 2023 08:54:23 -0700
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Subject: Re: [PATCH] x86/mm: Print the encryption features correctly when a
 paravisor is present
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To:     Dexuan Cui <decui@microsoft.com>, kys@microsoft.com,
        haiyangz@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de,
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References: <20231019062030.3206-1-decui@microsoft.com>
From:   Dave Hansen <dave.hansen@intel.com>
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> --- a/arch/x86/hyperv/ivm.c
> +++ b/arch/x86/hyperv/ivm.c
> @@ -450,6 +450,16 @@ static bool hv_is_private_mmio(u64 addr)
>  	return false;
>  }
>  
> +static void hv_print_mem_enc_feature_info(void)
> +{
> +	enum hv_isolation_type type = hv_get_isolation_type();
> +
> +	if (type == HV_ISOLATION_TYPE_SNP)
> +		pr_info("Memory Encryption Features active: AMD SEV\n");
> +	else if (type == HV_ISOLATION_TYPE_TDX)
> +		pr_info("Memory Encryption Features active: Intel TDX\n");
> +}

If we draw this to its logical conclusion, every paravisor will need a
pr_info() for every hardware CoCo implementation.  That M*N pr_info()s.
That seems nuts.