linux-kernel - Re: [PATCH v13 09/12] mm: x86: Invoke hypercall when page encryption status is changed

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Date:   Wed, 21 Apr 2021 08:50:34 -0500
From:   Brijesh Singh <brijesh.singh@....com>
To:     Ashish Kalra <ashish.kalra@....com>, Borislav Petkov <bp@...en8.de>
Cc:     brijesh.singh@....com, pbonzini@...hat.com, tglx@...utronix.de,
        mingo@...hat.com, hpa@...or.com, joro@...tes.org,
        thomas.lendacky@....com, x86@...nel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, srutherford@...gle.com,
        seanjc@...gle.com, venu.busireddy@...cle.com
Subject: Re: [PATCH v13 09/12] mm: x86: Invoke hypercall when page encryption
 status is changed


On 4/21/21 7:12 AM, Ashish Kalra wrote:
>>> +
>>> +		psize = page_level_size(level);
>>> +		pmask = page_level_mask(level);
>>> +
>>> +		kvm_sev_hypercall3(KVM_HC_PAGE_ENC_STATUS,
>>> +				   pfn << PAGE_SHIFT, psize >> PAGE_SHIFT, enc);
>>> +
>>> +		vaddr_next = (vaddr & pmask) + psize;
>>> +	}
>> As with other patches from Brijesh, that should be a while loop. :)
>>
> I see that early_set_memory_enc_dec() is also using a for loop, so which
> patches are you referring to ?
>
I guess Boris is referring to my SNP patches. Please go ahead and use
the while loop as recommended by Boris.

-Brijesh