Re: [PATCH 1/9] x86/hyperv: Add sev-snp enlightened guest static key

[Tianyu Lan <ltykernel@gmail.com>]

On 6/5/2023 8:09 PM, Vitaly Kuznetsov wrote:
> Tianyu Lan <ltykernel@gmail.com> writes:
>>   int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages);
>> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
>> index c7969e806c64..9186453251f7 100644
>> --- a/arch/x86/kernel/cpu/mshyperv.c
>> +++ b/arch/x86/kernel/cpu/mshyperv.c
>> @@ -402,8 +402,12 @@ static void __init ms_hyperv_init_platform(void)
>>   		pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n",
>>   			ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b);
>>   
>> -		if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP)
>> +
>> +		if (cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) {
>> +			static_branch_enable(&isolation_type_en_snp);
>> +		} else if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) {
>>   			static_branch_enable(&isolation_type_snp);
> 
> Nitpick: In case 'isolation_type_snp' and 'isolation_type_en_snp' are
> mutually exclusive, I'd suggest we rename the former: it is quite
> un-intuitive that for an enlightened SNP guest '&isolation_type_snp' is
> NOT enabled. E.g. we can use
> 
> 'isol_type_snp_paravisor'
> and
> 'isol_type_snp_enlightened'
> 
> (I also don't like 'isolation_type_en_snp' name as 'en' normally stands
> for 'enabled')
> 

Hi Vitaly:
	I will do such rename the function in the following patchset and this 
will not affect SEV-SNP function.