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Date: Tue, 10 Aug 2021 08:39:02 -0500 From: Brijesh Singh <brijesh.singh@....com> To: Borislav Petkov <bp@...en8.de> Cc: brijesh.singh@....com, x86@...nel.org, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org, linux-coco@...ts.linux.dev, linux-mm@...ck.org, linux-crypto@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Joerg Roedel <jroedel@...e.de>, Tom Lendacky <thomas.lendacky@....com>, "H. Peter Anvin" <hpa@...or.com>, Ard Biesheuvel <ardb@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <seanjc@...gle.com>, Vitaly Kuznetsov <vkuznets@...hat.com>, Wanpeng Li <wanpengli@...cent.com>, Jim Mattson <jmattson@...gle.com>, Andy Lutomirski <luto@...nel.org>, Dave Hansen <dave.hansen@...ux.intel.com>, Sergio Lopez <slp@...hat.com>, Peter Gonda <pgonda@...gle.com>, Peter Zijlstra <peterz@...radead.org>, Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, David Rientjes <rientjes@...gle.com>, Dov Murik <dovmurik@...ux.ibm.com>, Tobin Feldman-Fitzthum <tobin@....com>, Michael Roth <michael.roth@....com>, Vlastimil Babka <vbabka@...e.cz>, tony.luck@...el.com, npmccallum@...hat.com, brijesh.ksingh@...il.com Subject: Re: [PATCH Part1 RFC v4 03/36] x86/sev: Add support for hypervisor feature VMGEXIT On 8/10/21 6:22 AM, Borislav Petkov wrote: > > SVM_VMGEXIT_HV_FEATURES > Noted. >> >> +/* Bitmap of SEV features supported by the hypervisor */ >> +u64 sev_hv_features __section(".data..ro_after_init") = 0; > > __ro_after_init Noted. > >> diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c >> index 66b7f63ad041..540b81ac54c9 100644 >> --- a/arch/x86/kernel/sev.c >> +++ b/arch/x86/kernel/sev.c >> @@ -96,6 +96,9 @@ struct ghcb_state { >> static DEFINE_PER_CPU(struct sev_es_runtime_data*, runtime_data); >> DEFINE_STATIC_KEY_FALSE(sev_es_enable_key); >> >> +/* Bitmap of SEV features supported by the hypervisor */ >> +EXPORT_SYMBOL(sev_hv_features); > > Why is this exported and why not a _GPL export? > I was thinking that some driver may need it in future, but nothing in my series needs it yet. I will drop it and we can revisit it later. -Brijesh
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