# Re: \[PATCH 06/11\] x86/sev: Replace occurrences of sev\_es\_active() with prot\_guest\_has()

- From: Tom Lendacky \<thomas.lendacky@amd.com\>
- Date: 2021-08-09 21:59:08 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/08/211909
- Thread: https://ratatoskr.run/linuxppc-dev/2021/07/211118/t.md

```text
On 8/2/21 5:45 AM, Joerg Roedel wrote:
> On Tue, Jul 27, 2021 at 05:26:09PM -0500, Tom Lendacky wrote:
>> @@ -48,7 +47,7 @@ static void sme_sev_setup_real_mode(struct trampoline_header *th)
>>  	if (prot_guest_has(PATTR_HOST_MEM_ENCRYPT))
>>  		th->flags |= TH_FLAGS_SME_ACTIVE;
>>  
>> -	if (sev_es_active()) {
>> +	if (prot_guest_has(PATTR_GUEST_PROT_STATE)) {
>>  		/*
>>  		 * Skip the call to verify_cpu() in secondary_startup_64 as it
>>  		 * will cause #VC exceptions when the AP can't handle them yet.
> 
> Not sure how TDX will handle AP booting, are you sure it needs this
> special setup as well? Otherwise a check for SEV-ES would be better
> instead of the generic PATTR_GUEST_PROT_STATE.

Yes, I'm not sure either. I figure that change can be made, if needed, as
part of the TDX support.

Thanks,
Tom

> 
> Regards,
> 
> Joerg
> 
```