linux-kernel - Re: [PATCH v6 1/5] x86/kvm: Add AMD SEV specific Hypercall3

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Date:   Tue, 26 Oct 2021 20:48:54 +0000
From:   Ashish Kalra <ashkalra@....com>
To:     Borislav Petkov <bp@...en8.de>,
        "Kalra, Ashish" <Ashish.Kalra@....com>
Cc:     Steve Rutherford <srutherford@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "joro@...tes.org" <joro@...tes.org>,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        "x86@...nel.org" <x86@...nel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Singh, Brijesh" <brijesh.singh@....com>,
        "dovmurik@...ux.ibm.com" <dovmurik@...ux.ibm.com>,
        "tobin@...ux.ibm.com" <tobin@...ux.ibm.com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "dgilbert@...hat.com" <dgilbert@...hat.com>
Subject: Re: [PATCH v6 1/5] x86/kvm: Add AMD SEV specific Hypercall3

Hello Paolo,

With reference to Boris's ack below, are you going to go ahead and queue 
this patch-set to kvm tree ?

Or do you want me to work on improving on or fixing anything on this 
patch-set?

Thanks,

Ashish

On 9/29/21 11:44 AM, Borislav Petkov wrote:
> On Tue, Sep 28, 2021 at 07:26:32PM +0000, Kalra, Ashish wrote:
>> Yes that’s what I mentioned to Boris.
> Right, and as far as I'm concerned, the x86 bits look ok to me and I'm
> fine with this going through the kvm tree.
>
> There will be a conflict with this:
>
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.kernel.org%2Fr%2F20210928191009.32551-1-bp%40alien8.de&amp;data=04%7C01%7CAshish.Kalra%40amd.com%7Cbfa692635e9d4247a8f708d9833e8bcd%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637685126945432007%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=vZU8ZijdqiSiVpCquIMqu2yz3Z7sWgD3vvNiiQyszzo%3D&amp;reserved=0
>
> resulting in:
>
> arch/x86/kernel/kvm.c: In function ‘setup_efi_kvm_sev_migration’:
> arch/x86/kernel/kvm.c:563:7: error: implicit declaration of function ‘sev_active’; did you mean ‘cpu_active’? [-Werror=implicit-function-declaration]
>    563 |  if (!sev_active() ||
>        |       ^~~~~~~~~~
>        |       cpu_active
> cc1: some warnings being treated as errors
> make[2]: *** [scripts/Makefile.build:277: arch/x86/kernel/kvm.o] Error 1
> make[2]: *** Waiting for unfinished jobs....
> make[1]: *** [scripts/Makefile.build:540: arch/x86/kernel] Error 2
> make: *** [Makefile:1868: arch/x86] Error 2
> make: *** Waiting for unfinished jobs....
>
> but Paolo and I will figure out what to do - I'll likely have a separate
> branch out which he can merge and that sev_active() will need to be
> converted to
>
> 	if (!cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT))
>
> which is trivial.
>
> Thx.
>