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X-CSE-ConnectionGUID: ZjBKdAjwQLSyY2YPDhi8EA== X-CSE-MsgGUID: oJwD24PoSXegPEplKhv+aQ== X-IronPort-AV: E=McAfee;i="6800,10657,11872"; a="112600702" X-IronPort-AV: E=Sophos;i="6.25,218,1779174000"; d="scan'208";a="112600702" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Aug 2026 22:34:05 -0700 X-CSE-ConnectionGUID: fPXyq4LvQsCVdziJqFJAOQ== X-CSE-MsgGUID: K7I87BFVSgisT8D/7Pn29Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,218,1779174000"; d="scan'208";a="261787286" Received: from unknown (HELO [10.238.2.33]) ([10.238.2.33]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Aug 2026 22:33:52 -0700 Message-ID: <079c36db-003a-462f-9877-5361f10d9571@linux.intel.com> Date: Wed, 12 Aug 2026 13:33:49 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 06/41] KVM: Provide generic interface for checking memory private/shared status To: ackerleytng@google.com Cc: aik@amd.com, andrew.jones@linux.dev, brauner@kernel.org, chao.p.peng@linux.intel.com, david@kernel.org, jmattson@google.com, jthoughton@google.com, michael.roth@amd.com, oupton@kernel.org, pankaj.gupta@amd.com, qperret@google.com, rick.p.edgecombe@intel.com, rientjes@google.com, shivankg@amd.com, steven.price@arm.com, tabba@google.com, willy@infradead.org, wyihan@google.com, yan.y.zhao@intel.com, forkloop@google.com, pratyush@kernel.org, suzuki.poulose@arm.com, aneesh.kumar@kernel.org, liam@infradead.org, Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Andrew Morton , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Baoquan He , Jason Gunthorpe , John Hubbard , Peter Xu , tarunsahu@google.com, Vlastimil Babka , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, Xiaoyao Li References: <20260807-gmem-inplace-conversion-v10-0-2fc18ee6d3ba@google.com> <20260807-gmem-inplace-conversion-v10-6-2fc18ee6d3ba@google.com> Content-Language: en-US From: Binbin Wu In-Reply-To: <20260807-gmem-inplace-conversion-v10-6-2fc18ee6d3ba@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 163E640002 X-Stat-Signature: ew197u74dh44fdn6g6cafq1k7awuai17 X-HE-Tag: 1786512846-571549 X-HE-Meta: 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 /ubMT99o 4n+PMmrtfdgLUfQDk+Cgv1fXARes5zqnZNWMVfm3UCy8cEpOCs6FrzpFXc4eeQQp1wOlcd9zpFZarkL4EAmUHnoeQpDHPtEU+kr4yEib6/WgWxxXGn3o7IoGW7PwS5W1KRrudfIM+JtipY0fHOIbleGrku7zN4ZfWOk8I9L4rGhwLm5STHceyRis4prWBM8zKhHumhf00v7d4r0NR8liKHwTA3RiH15RYuTD9h6eongWakAvOg3Cx2rhwLzf/3/fb7E56aSpK1womcP6DA9cWvhsmL7t/t2812CIDmiMiyx5Qxcnu567/qcwGUkm9m/L8g2Uk9izMwtm64O8naYdtVgyITw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/8/2026 5:52 AM, Ackerley Tng via B4 Relay wrote: > From: Sean Christopherson > > Introduce a generic kvm_mem_is_private() interface using a static call to > determine if a GFN is private. This allows the implementation for checking > a GFN's private/shared status to be set at runtime. > > In preparation for choosing implementations between a guest_memfd lookup > and the existing VM attribute lookup, rename the existing > VM-attribute-based check to kvm_vm_mem_is_private to emphasize that it Nit: kvm_vm_mem_is_private -> kvm_vm_mem_is_private() > looks up VM attributes. > > Signed-off-by: Sean Christopherson > Reviewed-by: Xiaoyao Li > Reviewed-by: Fuad Tabba > Tested-by: Shivank Garg > Signed-off-by: Ackerley Tng Reviewed-by: Binbin Wu