From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 80265FF885A for ; Tue, 28 Apr 2026 23:29:52 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E66AB6B00D7; Tue, 28 Apr 2026 19:29:51 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E16426B00D9; Tue, 28 Apr 2026 19:29:51 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CDED36B00DA; Tue, 28 Apr 2026 19:29:51 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id BA6FB6B00D7 for ; Tue, 28 Apr 2026 19:29:51 -0400 (EDT) Received: from smtpin04.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 44AC31C0EE7 for ; Tue, 28 Apr 2026 23:25:22 +0000 (UTC) X-FDA: 84709548084.04.87420B2 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf18.hostedemail.com (Postfix) with ESMTP id 2B2B51C0009 for ; Tue, 28 Apr 2026 23:25:19 +0000 (UTC) Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=TECxRH7d; spf=pass (imf18.hostedemail.com: domain of devnull+ackerleytng.google.com@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=devnull+ackerleytng.google.com@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1777418720; h=from:from:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=42VYKq3oU14EpMNn8N7BUEKEh+lvEmuwu7yXFsVAhjA=; b=mcObJLPutGpCWBKYAFWFy9wkVGL/I6jB/Q+w3FIStAAMzlJ79qhq20y1quZTt2tSKjJ9mB yv8BA8pqwGa/jFOy7WgoTah6mM8LyoJvTaM+3SMQeP80icGSrtwk/OZsXjqfuSpGG9QieH ZcU+JiF5cG53kzFLSEVM8kJC216aEjg= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1777418720; a=rsa-sha256; cv=none; b=7Tc4yJg6EdiFpY+10FbFCw3Pzo9zk5sK6oWlzSCeZiI0R1FeK+qYuxbzzdf2+RRSVsQ+kP ZLgM/aL99MCTejJmifkqvzpvRo651EslE36H5C+kBmbSK5YGl5++riROLLfF/Oaf6dIoTR Stdk5C0GR+5hD4luby0Y58s2RaMnzps= ARC-Authentication-Results: i=1; imf18.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=TECxRH7d; spf=pass (imf18.hostedemail.com: domain of devnull+ackerleytng.google.com@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=devnull+ackerleytng.google.com@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id B4E2B44488; Tue, 28 Apr 2026 23:25:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 48DDAC2BCFD; Tue, 28 Apr 2026 23:25:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777418717; bh=AaF4HXGpP5WD6rmFOZxYKszkVonAtOtfufgz8/0EJFA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=TECxRH7dkgEkaATJlrzxU+2UYhlBdNl/WGlDIixmHZcnS8qBtEDP6PBsEsTstWAef 0mDThIVLhAV5LRd5Qs/zPWXSjzd2Gx4yN9N92LxjrZMVO+rmGR8LHYawy074RML1dI LFxn6Tej0APPQFGIBkAzy9vMIj7gNOAuB6VMjtHpDr41KZlu2s7iI9YNZyaC0lcBiH +rX0bpCw5uGqLqE5S3baeoDoLH9M6HmAAJpduMPK+IE3wGPdW2ut28fG+/hOJ/Kt9r On2BCWmtd4jRB13UFPwUTkBdoB87ePxZUfhltla4Z5eb0yceTzcjwD03qTi4UEvAkF PTO9yweGJ1rrw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 371B8FF8879; Tue, 28 Apr 2026 23:25:17 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Tue, 28 Apr 2026 16:24:58 -0700 Subject: [PATCH RFC v5 03/53] KVM: Enumerate support for PRIVATE memory iff kvm_arch_has_private_mem is defined MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260428-gmem-inplace-conversion-v5-3-d8608ccfca22@google.com> References: <20260428-gmem-inplace-conversion-v5-0-d8608ccfca22@google.com> In-Reply-To: <20260428-gmem-inplace-conversion-v5-0-d8608ccfca22@google.com> To: aik@amd.com, andrew.jones@linux.dev, binbin.wu@linux.intel.com, brauner@kernel.org, chao.p.peng@linux.intel.com, david@kernel.org, ira.weiny@intel.com, 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, 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 , Baoquan He , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , 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, Ackerley Tng X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777418714; l=1791; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=Wv0T7BRlY/etY57IYCmbdP7OGNUJqEfLohRwRHtaZTY=; b=XT8IsQV/NcpbmHXja8QsL7lhxDNOK+DGwKds9n4+pmWqIZ673ExEPONdT11cUL0EYvx+PL3C0 7Po5/EMzQ5vCB4FICf7wMtQLA6KQ9zUFzGAb+XhGvBwk+v+doKObl2s X-Developer-Key: i=ackerleytng@google.com; a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Endpoint-Received: by B4 Relay for ackerleytng@google.com/20260225 with auth_id=649 X-Original-From: Ackerley Tng Reply-To: ackerleytng@google.com X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 2B2B51C0009 X-Stat-Signature: z3acbsr55p1quyyrp1o3rhmcd1zy7kio X-Rspam-User: X-HE-Tag: 1777418719-364935 X-HE-Meta: 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 ZbtMoQOC VcTQkv850Z/KgtvPxOBffb+SkK0wrNyGnQnqC5+LvLKpf6myOXO+A9d0ySBgkPopVh+5xcdEwyS1Cleim64RN6vPr98XfUA9JIe8ggNpdSHdeU65AwASA46yJ0tXYFYm/XvVtl7xq3vW319fxfU3uLSjY4LagfAYeXEo/vZqsuh31xgoVbJSObkyaVEAKOYwM9NE8yJqIRb1KB1tqccbxHabga8UHV3noqqWg4Eql8CQVHrTeHKurGMAYZGaqKmH50hwjuEjniojxm4ARJqHc4hxdKVIVgaIByh2qdGFRbvdWn+SN5pSVT5+DXM7wEZiUHzYAA1NX8kpFw+un2PLVg7ZgUCsJElsFNHFo0yJ62JDqpX6uKw6j0qmw7w0jjrWJtojH19EX6AkNHCPshAxldjBiQKDAb6Wc/8zazzoWG8kiexki6Vl26zHe/LWiRS6G4EvT5/cou5zgsos= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Sean Christopherson Explicitly guard reporting support for KVM_MEMORY_ATTRIBUTE_PRIVATE based on kvm_arch_has_private_mem being #defined in anticipation of decoupling kvm_supported_mem_attributes() from CONFIG_KVM_VM_MEMORY_ATTRIBUTES. guest_memfd support for memory attributes will be unconditional to avoid yet more macros (all architectures that support guest_memfd are expected to use per-gmem attributes at some point), at which point enumerating support KVM_MEMORY_ATTRIBUTE_PRIVATE based solely on memory attributes being supported _somewhere_ would result in KVM over-reporting support on arm64. Signed-off-by: Sean Christopherson Signed-off-by: Ackerley Tng --- include/linux/kvm_host.h | 2 +- virt/kvm/kvm_main.c | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 7b9faa3545300..7d079f9701346 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -722,7 +722,7 @@ static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu) } #endif -#ifndef CONFIG_KVM_VM_MEMORY_ATTRIBUTES +#ifndef kvm_arch_has_private_mem static inline bool kvm_arch_has_private_mem(struct kvm *kvm) { return false; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 306153abbafa5..abb9cfa3eb04d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2421,8 +2421,10 @@ static int kvm_vm_ioctl_clear_dirty_log(struct kvm *kvm, #ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES static u64 kvm_supported_mem_attributes(struct kvm *kvm) { +#ifdef kvm_arch_has_private_mem if (!kvm || kvm_arch_has_private_mem(kvm)) return KVM_MEMORY_ATTRIBUTE_PRIVATE; +#endif return 0; } -- 2.54.0.545.g6539524ca2-goog