linux-kernel - Re: [PATCH kernel v3 3/3] x86/sev: Do not handle #VC for DR7 read/write

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Message-ID: <7881a2d8-9655-31ad-27d0-5c30db7895fe@amd.com>
Date:   Wed, 25 Jan 2023 14:11:27 +1100
From:   Alexey Kardashevskiy <aik@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Nikunj A. Dadhania" <nikunj@....com>, kvm@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        Yury Norov <yury.norov@...il.com>,
        Venu Busireddy <venu.busireddy@...cle.com>,
        Tony Luck <tony.luck@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sean Christopherson <seanjc@...gle.com>,
        Sandipan Das <sandipan.das@....com>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Michael Roth <michael.roth@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Kim Phillips <kim.phillips@....com>,
        Kees Cook <keescook@...omium.org>,
        Juergen Gross <jgross@...e.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH kernel v3 3/3] x86/sev: Do not handle #VC for DR7
 read/write



On 20/1/23 23:06, Borislav Petkov wrote:
> On Fri, Jan 20, 2023 at 09:23:48PM +1100, Alexey Kardashevskiy wrote:
>> Worth mentioning it is tip/x86/urgent (which does not have
>> X86_FEATURE_NO_NESTED_DATA_BP), not tip/master (which has
>> X86_FEATURE_NO_NESTED_DATA_BP).
> 
> Yeah, when you submit patches for tip, you can always use tip/master which has
> the latest lineup of all branches and should have all the required bits.

The tip/master's head just a few days ago was 195df42eb64dcb "Merge 
branch into tip/master: 'x86/platform'" and did have dcf67f724b8ada 
"x86/cpu, kvm: Add the NO_NESTED_DATA_BP feature"  but now tip/master 
does not have it -  8272720be044 "Merge x86/cache into tip/master". /me 
confused. What tree is the tree?


> 
> Thx.
> 

-- 
Alexey