linux-kernel - Re: [RFC PATCH V3 09/16] x86/hyperv: SEV-SNP enlightened guest don't support legacy rtc

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Message-ID: <f8c7c646-bb99-3a79-98d9-349a4f8cbbd1@gmail.com>
Date:   Thu, 2 Feb 2023 11:43:57 +0800
From:   Tianyu Lan <ltykernel@...il.com>
To:     Wei Liu <wei.liu@...nel.org>
Cc:     luto@...nel.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, seanjc@...gle.com, pbonzini@...hat.com,
        jgross@...e.com, tiala@...rosoft.com, kirill@...temov.name,
        jiangshan.ljs@...group.com, peterz@...radead.org,
        ashish.kalra@....com, srutherford@...gle.com,
        akpm@...ux-foundation.org, anshuman.khandual@....com,
        pawan.kumar.gupta@...ux.intel.com, adrian.hunter@...el.com,
        daniel.sneddon@...ux.intel.com, alexander.shishkin@...ux.intel.com,
        sandipan.das@....com, ray.huang@....com, brijesh.singh@....com,
        michael.roth@....com, thomas.lendacky@....com,
        venu.busireddy@...cle.com, sterritt@...gle.com,
        tony.luck@...el.com, samitolvanen@...gle.com, fenghua.yu@...el.com,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [RFC PATCH V3 09/16] x86/hyperv: SEV-SNP enlightened guest don't
 support legacy rtc

On 1/31/2023 10:03 PM, Wei Liu wrote:
>> diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
>> index 1a4af0a4f29a..7266d71d30d6 100644
>> --- a/arch/x86/include/asm/mshyperv.h
>> +++ b/arch/x86/include/asm/mshyperv.h
>> @@ -33,6 +33,12 @@ extern bool hv_isolation_type_en_snp(void);
>>   
>>   extern union hv_ghcb * __percpu *hv_ghcb_pg;
>>   
>> +/*
>> + * Hyper-V puts processor and memory layout info
>> + * to this address in SEV-SNP enlightened guest.
>> + */
>> +#define EN_SEV_SNP_PROCESSOR_INFO_ADDR	0x802000
> This hunk should be moved to the previous patch. It is not needed in
> this patch.

Nice catch. Sorry for noise. Will fix in the next version.

Thanks.