linux-kernel - Re: [PATCH v7 0/8] x86/hyperv: Add AMD sev-snp enlightened guest support on hyperv

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Message-ID: <b4979997-23b9-0c43-574e-e4a3506500ff@amd.com>
Date:   Tue, 22 Aug 2023 14:37:48 -0500
From:   Tom Lendacky <thomas.lendacky@....com>
To:     Wei Liu <wei.liu@...nel.org>, Tianyu Lan <ltykernel@...il.com>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, decui@...rosoft.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        daniel.lezcano@...aro.org, arnd@...db.de,
        michael.h.kelley@...rosoft.com, Tianyu Lan <tiala@...rosoft.com>,
        linux-arch@...r.kernel.org, linux-hyperv@...r.kernel.org,
        linux-kernel@...r.kernel.org, vkuznets@...hat.com
Subject: Re: [PATCH v7 0/8] x86/hyperv: Add AMD sev-snp enlightened guest
 support on hyperv

On 8/21/23 20:16, Wei Liu wrote:
> On Fri, Aug 18, 2023 at 06:29:10AM -0400, Tianyu Lan wrote:
>> From: Tianyu Lan <tiala@...rosoft.com>
>>
>> Tianyu Lan (8):
>>    x86/hyperv: Add sev-snp enlightened guest static key
>>    x86/hyperv: Set Virtual Trust Level in VMBus init message
>>    x86/hyperv: Mark Hyper-V vp assist page unencrypted in SEV-SNP
>>      enlightened guest
>>    drivers: hv: Mark percpu hvcall input arg page unencrypted in SEV-SNP
>>      enlightened guest
>>    x86/hyperv: Use vmmcall to implement Hyper-V hypercall in sev-snp
>>      enlightened guest
>>    clocksource: hyper-v: Mark hyperv tsc page unencrypted in sev-snp
>>      enlightened guest
>>    x86/hyperv: Add smp support for SEV-SNP guest
>>    x86/hyperv: Add hyperv-specific handling for VMMCALL under SEV-ES
> 
> Applied to hyperv-next. Thanks.

Just found that this series fails to build if CONFIG_HYPERV is not set:

ld: arch/x86/kernel/cpu/mshyperv.o: in function `ms_hyperv_init_platform':
/root/kernels/linux-next-build-x86_64/arch/x86/kernel/cpu/mshyperv.c:417: undefined reference to `isolation_type_en_snp'
make[2]: *** [scripts/Makefile.vmlinux:36: vmlinux] Error 1
make[1]: *** [/root/kernels/linux-next-build-x86_64/Makefile:1166: vmlinux] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:234: __sub-make] Error 2

Thanks,
Tom