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Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Andy Lutomirski , Dave Hansen , Sergio Lopez , Peter Gonda , Peter Zijlstra , Srinivas Pandruvada , David Rientjes , Dov Murik , Tobin Feldman-Fitzthum , Michael Roth , Vlastimil Babka , "Kirill A . Shutemov" , Andi Kleen , tony.luck@intel.com, marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com Subject: Re: [PATCH Part1 v5 11/38] x86/compressed: Add helper for validating pages in the decompression stage Message-ID: References: <20210820151933.22401-1-brijesh.singh@amd.com> <20210820151933.22401-12-brijesh.singh@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210820151933.22401-12-brijesh.singh@amd.com> Authentication-Results: imf04.hostedemail.com; dkim=temperror ("DNS error when getting key") header.d=alien8.de header.s=dkim header.b=fl2Qa5G0; spf=pass (imf04.hostedemail.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=temperror reason="query timed out" header.from=alien8.de (policy=temperror) X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 8107350000A1 X-Stat-Signature: weo81amcjt4wy8tfeffrhaoaoyrd59gz X-HE-Tag: 1629728183-965771 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Aug 20, 2021 at 10:19:06AM -0500, Brijesh Singh wrote: > diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/s= ev-common.h > index d426c30ae7b4..1cd8ce838af8 100644 > --- a/arch/x86/include/asm/sev-common.h > +++ b/arch/x86/include/asm/sev-common.h > @@ -57,6 +57,26 @@ > #define GHCB_MSR_AP_RESET_HOLD_REQ 0x006 > #define GHCB_MSR_AP_RESET_HOLD_RESP 0x007 > =20 > +/* SNP Page State Change */ Let's make it very clear here that those cmd numbers below are actually part of the protocol and not randomly chosen: /* * ... * * 0x014 =E2=80=93 SNP Page State Change Request * * GHCBData[55:52] =E2=80=93 Page operation: * 0x0001 =E2=80=93 Page assignment, Private * 0x0002 =E2=80=93 Page assignment, Shared */ > +enum psc_op { > + SNP_PAGE_STATE_PRIVATE =3D 1, > + SNP_PAGE_STATE_SHARED, > +}; > + --=20 Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette