From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E0313F6C24; Tue, 30 Jun 2026 10:46:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782816384; cv=none; b=NrWhaO46xL+8aqFUYnP6EFvo3lYCjG0BJj5gak9nB4Whn9o5U2Ef1v4vCKbXDWbv9H2mG1So0hKI7y0/WcRfW6tzoMFowtbKJJ0qCyy+Vm09n3lvF3tgwHSvPEP+54ovmj7eJ+6TddoBlubMMaumcxU0Q51h/ge9ERcD7g2gKYU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782816384; c=relaxed/simple; bh=ydIclReBsYd1/Q40BSDyaWtNirB1lFLBEoV1UQ/28ZM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Hakst+JU7A/7dWMnszcfHkWpMU8lH8Ud1UyYBHQ+X78qKe+rE6NdeIcyts3xlEczfUvxZ3F/c5lpJCVy7xiXRY8uckW6YnLNYwmcwrV4nY9AU0Qj3PozBDyX35TGM+jCIMywpYxIuEe7hZYcPNR6fOStcVfBXI9WJZ9/+4/uPsM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=gtM/IFl0; arc=none smtp.client-ip=198.175.65.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="gtM/IFl0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1782816379; x=1814352379; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=ydIclReBsYd1/Q40BSDyaWtNirB1lFLBEoV1UQ/28ZM=; b=gtM/IFl0xfUKYxV7PyzhtVN8sE+JyIyTkHGfWVYM3+mEoNJ58MoLx1Mw Frdc0LR+658KuA/QIYqhor8T8/eeHYk0AuKZh1d7SlIkYwuTq6KjbEgHa aaE/xhdfqr/k1TZrtG0ZVYhGsp2Z+AXNyToJGWM/n4GgE/6SqaWqTC4eb jK1kwJbzbnBhR4B5k6ObWnb/6UL68SR9qiMegZFwNJgLboZbd4J49eNZ7 +vWNdaCB83E1sXEYYc+Pb+6CmSYlgF6YtEkgQcFouELrzeBP3yjJsHiI+ EhvyD+CkiTPZzpwFoKY59LXn0bzTprNnBFhPcP3mSMaMofI9zEwJW1JDV A==; X-CSE-ConnectionGUID: f69p6dk9TouSJTzczhHRsA== X-CSE-MsgGUID: /0cef8X2RsuU0kNhEpo0tA== X-IronPort-AV: E=McAfee;i="6800,10657,11832"; a="94676844" X-IronPort-AV: E=Sophos;i="6.24,233,1774335600"; d="scan'208";a="94676844" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2026 03:46:13 -0700 X-CSE-ConnectionGUID: kIS6WMq4Rfum65TODXoe7A== X-CSE-MsgGUID: q2IEDfAAQJKrOxUnJNZT+A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,233,1774335600"; d="scan'208";a="251179296" Received: from xiaoyaol-hp-g830.ccr.corp.intel.com (HELO [10.239.158.70]) ([10.239.158.70]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2026 03:45:57 -0700 Message-ID: Date: Tue, 30 Jun 2026 18:45:54 +0800 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 03/46] KVM: Move KVM_VM_MEMORY_ATTRIBUTES config definition to x86 To: ackerleytng@google.com, aik@amd.com, andrew.jones@linux.dev, binbin.wu@linux.intel.com, 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 , Vlastimil Babka Cc: 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 References: <20260618-gmem-inplace-conversion-v8-0-9d2959357853@google.com> <20260618-gmem-inplace-conversion-v8-3-9d2959357853@google.com> Content-Language: en-US From: Xiaoyao Li In-Reply-To: <20260618-gmem-inplace-conversion-v8-3-9d2959357853@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 6/19/2026 8:31 AM, Ackerley Tng via B4 Relay wrote: > From: Sean Christopherson > > Bury KVM_VM_MEMORY_ATTRIBUTES in x86 to discourage other architectures > from adding support for per-VM memory attributes, because tracking private > vs. shared memory on a per-VM basis is now deprecated in favor of tracking > on a per-guest_memfd basis, and while RWX memory attributes are on the > horizon, they too are expected to be x86-only. > > This will also allow modifying KVM_VM_MEMORY_ATTRIBUTES to be > user-selectable (in x86) without creating weirdness in KVM's Kconfigs. > Now that guest_memfd supports in-place conversions, it's entirely possible > to run x86 CoCo VMs without support for KVM_VM_MEMORY_ATTRIBUTES. > > Leave the code itself in common KVM so that it's trivial to undo this > change if new per-VM attributes do come along. > > Signed-off-by: Sean Christopherson > Reviewed-by: Fuad Tabba > Signed-off-by: Ackerley Tng Reviewed-by: Xiaoyao Li