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[91.12.106.1]) by smtp.gmail.com with ESMTPSA id e1sm5655215wru.26.2021.10.15.09.59.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 Oct 2021 09:59:09 -0700 (PDT) Message-ID: Date: Fri, 15 Oct 2021 18:59:08 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: [PATCH v10 01/11] x86/paravirt: Move halt paravirt calls under CONFIG_PARAVIRT Content-Language: en-US To: Kuppuswamy Sathyanarayanan , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Paolo Bonzini , Andrea Arcangeli , Josh Poimboeuf , Juergen Gross , Deep Shah , VMware Inc , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel Cc: Peter H Anvin , Dave Hansen , Tony Luck , Dan Williams , Andi Kleen , Kirill Shutemov , Sean Christopherson , Kuppuswamy Sathyanarayanan , linux-kernel@vger.kernel.org References: <20211009053747.1694419-1-sathyanarayanan.kuppuswamy@linux.intel.com> <20211009053747.1694419-2-sathyanarayanan.kuppuswamy@linux.intel.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20211009053747.1694419-2-sathyanarayanan.kuppuswamy@linux.intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09.10.21 07:37, Kuppuswamy Sathyanarayanan wrote: > From: "Kirill A. Shutemov" > > CONFIG_PARAVIRT_XXL is mainly defined/used by XEN PV guests. For > other VM guest types, features supported under CONFIG_PARAVIRT > are self sufficient. CONFIG_PARAVIRT mainly provides support for > TLB flush operations and time related operations. > > For TDX guest as well, paravirt calls under CONFIG_PARVIRT meets > most of its requirement except the need of HLT and SAFE_HLT > paravirt calls, which is currently defined under > COFNIG_PARAVIRT_XXL. > > Since enabling CONFIG_PARAVIRT_XXL is too bloated for TDX guest > like platforms, move HLT and SAFE_HLT paravirt calls under > CONFIG_PARAVIRT. > > Moving HLT and SAFE_HLT paravirt calls are not fatal and should not > break any functionality for current users of CONFIG_PARAVIRT. > > Co-developed-by: Kuppuswamy Sathyanarayanan > Signed-off-by: Kuppuswamy Sathyanarayanan > Signed-off-by: Kirill A. Shutemov > Reviewed-by: Andi Kleen > Reviewed-by: Tony Luck > --- > Reviewed-by: David Hildenbrand -- Thanks, David / dhildenb