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Message-ID: <20356d0e-74cc-1537-71f9-1c3f81e01b9f@intel.com>
Date:   Wed, 20 Apr 2022 07:30:01 -0700
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Subject: Re: [PATCH] x86/mm/ptdump: display page encryption state
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To:     Mike Rapoport <rppt@kernel.org>
Cc:     Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
        Mike Rapoport <rppt@linux.ibm.com>,
        Thomas Gleixner <tglx@linutronix.de>, x86@kernel.org,
        linux-kernel@vger.kernel.org,
        "Shutemov, Kirill" <kirill.shutemov@intel.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
References: <20220419143545.30295-1-rppt@kernel.org>
 <3f27999a-35bc-3499-2bf8-afd0e8666068@intel.com>
 <Yl+zdNP/5iHtPolv@kernel.org>
From:   Dave Hansen <dave.hansen@intel.com>
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On 4/20/22 00:17, Mike Rapoport wrote:
>> _PAGE_ENC is AMD-specific. Could we do this with a new generic "cc_"
>> function, maybe cc_is_enc()?
>>
>> Something like this would (I think) work for both SEV and TDX:
>>
>> bool cc_is_enc(u64 prot)
>> {
>> 	return cc_mkdec(prot) != prot;
>> }
> It works for SEV. I can repost with this and you'll confirm it works on
> TDX?

I don't have a TDX setup handy, but Kirill certainly does.  I'm sure
he'd be happy to give you a tested-by.