From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6F7E81D432D; Fri, 19 Jun 2026 00:31:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781829107; cv=none; b=AAo/WdfwOAfe5NtMZDpbgHaEqgnD65GGp0V0dG+rRQ+p7WM4ixuIGfZKtgQf+FylP/yRDnHRJt4fRDqs3UyZ0GN7WwnQ4p6E6+HGMIwO02mH6cvboQZL87KECcNURqtR6Y+V9h/085mV9cipCoMEGJkX4w+1Ab3POkZUawIEQyw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781829107; c=relaxed/simple; bh=p+vf1GdYaw06rsC6TMPpIRLPdjCPTGBRF9dsl2QD3U0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=FwpEqNVTeJiNRcAWkEhaHBXhOVrp2Co80Xy0cxJCHQXifVb4hQFEOVKKDv6cvPHZ7hWisRE6NnOabMHQR7X87TVZgTmM7gdkKyZISuLhp/vlwCVUiuEis7tZMNFiFSrRKoAZfVuwGvG4M/vA0JElBz2Ihghzp3WN6PKmmd2nOIg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nM1G3la4; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nM1G3la4" Received: by smtp.kernel.org (Postfix) with ESMTPS id 42BDEC4DDE9; Fri, 19 Jun 2026 00:31:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1781829107; bh=p+vf1GdYaw06rsC6TMPpIRLPdjCPTGBRF9dsl2QD3U0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=nM1G3la4k0QXa+y3q0GlZ8ct6mEolBZss4IHPuHtGIc94Cnf+aSVVvLBLsVpelvWI NieYEz5LO7kJ7tXHb9jXrMOaXtmdHDqP3s8fshKxMO1z8wHm1vtsW1hF3XW91EO7bW KsZ+N2KRsGDB744+wyGKWXHyIriLS36S3hKGIOX9SABYf2P3qkwjyzZ8pQNIiJuVQM O/vLnhRpKb7j9nk3vIqDx5gWEto47V/kbdmkqsih1j4dt3wVdF2gS0cqx6CH6BsKC/ PJK4sTDb8BkNnT04vwZB9XW2Gxod5ql0Pe5kLbpeuHVxV83N4KS8mnhzCut/hPCXeQ fxTVwj7W5bAOw== 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 3932FCD98FF; Fri, 19 Jun 2026 00:31:47 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Thu, 18 Jun 2026 17:31:43 -0700 Subject: [PATCH v8 06/46] KVM: Enumerate support for PRIVATE memory iff kvm_arch_has_private_mem is defined Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260618-gmem-inplace-conversion-v8-6-9d2959357853@google.com> References: <20260618-gmem-inplace-conversion-v8-0-9d2959357853@google.com> In-Reply-To: <20260618-gmem-inplace-conversion-v8-0-9d2959357853@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 , 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=1781829104; l=1346; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=NlhDvu6s2LsU5LP3fL2aGUwPEeFEOfoSWubQJ7t+Epw=; b=g8yrBpgl+kkcyR4bRSSfBZ/OwtgNvrVufi9s2nDmNOBH5Bt+PnBXSNIoAngZGkVva9SLPyKFf Np8MD2NXB5EAyHSfAB1GyfXFd9sAcL1OihNjg60+lW0zTPRqnFW8rs+ 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 From: Ackerley Tng 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 Signed-off-by: Ackerley Tng --- virt/kvm/kvm_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 1ccc4895a4c26..7b989b659cf82 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.rc0.738.g0c8ab3ebcc-goog