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 41F58C53219 for ; Wed, 29 Jul 2026 00:35:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 676556B0092; Tue, 28 Jul 2026 20:35:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 64CA46B009F; Tue, 28 Jul 2026 20:35:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2F0EA6B0092; Tue, 28 Jul 2026 20:35:13 -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 F2F576B0092 for ; Tue, 28 Jul 2026 20:35:12 -0400 (EDT) Received: from smtpin18.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 8BFABA196F for ; Wed, 29 Jul 2026 00:35:12 +0000 (UTC) X-FDA: 85039944864.18.99DB0A7 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf04.hostedemail.com (Postfix) with ESMTP id 8501D4000E for ; Wed, 29 Jul 2026 00:35:10 +0000 (UTC) Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=qDxtVZSZ; spf=pass (imf04.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=1785285310; 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=TSiV3LaCZWE+MrR5BCBlhlun8WzbbZ2b5pJ94KBR6Pc=; b=pVt7j7ITqTkDbDuu71EZIvzltpKmcwpQezX4IoIjsZlRLronlroOBD+4SsoSMO0PuKw9DW mA/gD6OFRytIPFP8R/T8fAy7tyr82kGbTaF/hYZBzgBdeexpRF+AMq9bHwcxwEr9HABTo3 Gw4OV7e9GMcB8z+sS/zDrMPrfTqN91k= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=qDxtVZSZ; spf=pass (imf04.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-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785285310; b=m2hQJAth1yNBaA9xHCecB5H6cpg8q4VSCRH36VEGSfvGsdNaEjP7mdxxVOuxhWJ6lWeINm 24h4yT756djAfqWhr80gXFks8BAcPp+F9CoLPwT6vf7L7Cb/NhBsONF7UembGw4iNK3FWv qBqAFAmvFzcWVRtiYi+LN0SpxYGx2/o= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 7B2A34514D; Wed, 29 Jul 2026 00:35:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 0697AC4AF0D; Wed, 29 Jul 2026 00:35:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1785285308; bh=6aM2ssaYqN42jru008dQMv0DvAC3ygeFS/sYOj9rJRc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=qDxtVZSZNyod0D2S8x9b53St2cXGFrSpYstdBKy0VB1Ge97lAO58+5BrajUTxUYr+ V2K9Z7tgBqYaBL8iVEnbpeWK4iND92pNRTR9QzI11dGKTWFRSSOrYRxhmfMAvRrnBL rMISw9vPu/XVkeiAngUbaoLoKMRAiMNg8BfXhPIljitpgUuoyUlCQvA06UJ/FmZGDa hMlfBuxl+bT1mUqh8x0LKtd2byAT4/0im+TSRlypsh9ud5QzVnhwm6Hz7n66Crb0D0 ShhalPrNA5U3oBEBGYbRUSwBQvCoj1UVMi7DZjHM56drJr/dOEULKzbMyBoJS3B+yt 2IJYPe3U0MYwQ== 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 D36F4C54F52; Wed, 29 Jul 2026 00:35:07 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Tue, 28 Jul 2026 17:35:02 -0700 Subject: [PATCH v9 03/41] 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: <20260728-gmem-inplace-conversion-v9-3-35f9aec2aed2@google.com> References: <20260728-gmem-inplace-conversion-v9-0-35f9aec2aed2@google.com> In-Reply-To: <20260728-gmem-inplace-conversion-v9-0-35f9aec2aed2@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, 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 , Jason Gunthorpe , Vlastimil Babka , Baoquan He 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=1785285305; l=1931; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=O7sxLpn2R0quc46LYFMUDbXF8+uTQ8KrVzojQDeT1HA=; b=DEnJly7jd1lfYKOrGzxeTHui0t87YpwfLT3ObP2JeuDTi+GFwbNee//TP89KNdFUt4ooSk15D SDFtlyD0SfXDiyPVNMHvt/yrw6tHTDxC6Y9DXI0oJcoE6erVJWktz2n 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-Queue-Id: 8501D4000E X-Rspam-User: X-Stat-Signature: fbxnhqxy19a8ujrfts39fwrdqd948xy4 X-Rspamd-Server: rspam04 X-HE-Tag: 1785285310-202295 X-HE-Meta: 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 TwJSQVzE C110bSJTcCWyrIYgz2cEKZ0o3e7n3ZJI61xA8haOQcc7VP0uHHzPhZW+t9GnDvjfV+/MKMAszvOW3HOE8LQ1QxfxhNKx/4TZnACbqpnamo5onZO8Rn3SQUl0IBYZ1uLF+qwcPVEG0OZn6e4DxOZteJitRpLBV7IAV0sy13ueBTkNnroVHqO9YBLklMV9nZN9X0wiUfH692vOGztMTr5vOgryOhguYNI5W0tClhq8JDcQuSRxkb190X5HgcKMNgfnTXmbgEn9prOg6IoAM6jorn3v8t8SJWtN9YT0q0zKRSswDNpbERxRr522oj3eOVOVMA2QCmX3/WPpoKEVIzGOf++ATW7NIAgwCLwccMalZ8D8rFRa4g1Lofx/Xfegc/X7F2q/pa5hd9f0iQpqkSxh3q1sOy6kXgrlYuaDoIT5ULSdyG5I+OqGy5y2rsjToIdTwBQyc3boRvWcL08Tggo7Cf5+OoyAcPmrrq8nQX207Sqrr7FbR3bn8MPQuriBLo3OtNf0dLRlCyR11+S0B5lc8EvScgGB4xAdiIJxfI1t1SZaLKk4Wc54YkEOy5kp5l9tk11Wou1cfHpRzew0= 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 Reviewed-by: Fuad Tabba Reviewed-by: Binbin Wu Tested-by: Shivank Garg 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 9f78a466c6f3e..c125d2e8155a7 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 902aa166c9c0c..9501dd8d015d1 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; } -- 2.55.0.508.g3f0d502094-goog