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 DC4394949FF; Thu, 7 May 2026 20:22:50 +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=1778185370; cv=none; b=rFxD+tTi8CXHLay58ltMGO4koxuk1RJVbEasFFx/c2zENem74UuboWqZwvMQMsLbrkyBM2netAAytnjJQPSTk0UnfRqBd8CU+iQlJgDM5zVGVE/ovUtTVId3oPbJ49Qj2mF9O3yvfJnMvlgvhqIGKBO2LYjMoQN+cLDYQbRgzhk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778185370; c=relaxed/simple; bh=mYQUiOVAFcdMn9F7AdXy5VHfulr7TgaYhY2jwKbtsXQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sETWmHrI6iNH+zW0N+gzSBXnUMbsKTePGqMB9JzV1V+IHLSAR94srm2RXs5lnqGtpzY39is00JhA6ROKY4kb2JMbsbTDmDMOUxq7jc6gzneNWOy3hr/sRjWJ5hl7ygm4jhrS05euSh/0tqbrX/9us7NUqxeQO+6Tat0utXk+dcQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FH1O/g8A; 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="FH1O/g8A" Received: by smtp.kernel.org (Postfix) with ESMTPS id BDF3BC2BCC7; Thu, 7 May 2026 20:22:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778185370; bh=mYQUiOVAFcdMn9F7AdXy5VHfulr7TgaYhY2jwKbtsXQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=FH1O/g8AuwXw+t3/EVlOrla+AQE3pzeR2LqC3lh/kQxltW5ozIBT0s+ETxRneT29D Qhol/bKjqc5loxPvppPBcAe9n8Bvw8zZDU9YcgLKftoJsNL0sPyCjyDocTB7qQqSit jTt0tb2cUY6eHqk/VbVSCwXD3pApKAp6Lue7ojtr0PA4VmaJXNiVTyLudDPXew4vhv 5AGJPbQcYmnL+Fl4iPwaspzhoDz6pJFahpLF7dSuC8M2z7LT7qUPD/s35eLLk0cNxc f4yYd7jiOPmjVpkLmYWJeIl+cCXO1o8xzMnejMBRv/ThSHtOc+jVKbVeProWkg/jF3 o0+GkNfExKYHA== 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 B098FCD3447; Thu, 7 May 2026 20:22:50 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Thu, 07 May 2026 13:22:37 -0700 Subject: [PATCH v6 18/43] KVM: Move KVM_VM_MEMORY_ATTRIBUTES config definition to x86 Precedence: bulk X-Mailing-List: linux-doc@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: <20260507-gmem-inplace-conversion-v6-18-91ab5a8b19a4@google.com> References: <20260507-gmem-inplace-conversion-v6-0-91ab5a8b19a4@google.com> In-Reply-To: <20260507-gmem-inplace-conversion-v6-0-91ab5a8b19a4@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, 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 , 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=1778185365; l=1805; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=sJS3/lDGth1Rw6pd4XUSGVYiXYontCIVaCOzoTR3u2g=; b=JGShSJ98Rti7ZbiCYYkxz+p3V5w7W/pjltb7+fRSUMAdgBSmn3fLjYUvzZvwtWuLIY4dN5Drm Pgkb6tca6IGAM0h+YRw3FdKTyT0Ncl0F9tC1y/H4LEWSk+VwYnKlGCL 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: 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 no other memory attributes are on the horizon. 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 support memory attributes, 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 Signed-off-by: Ackerley Tng --- arch/x86/kvm/Kconfig | 4 ++++ virt/kvm/Kconfig | 4 ---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 26f6afd51bbdc..b6d65ee664d0f 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -80,6 +80,10 @@ config KVM_WERROR If in doubt, say "N". +config KVM_VM_MEMORY_ATTRIBUTES + select KVM_MEMORY_ATTRIBUTES + bool + config KVM_SW_PROTECTED_VM bool "Enable support for KVM software-protected VMs" depends on EXPERT diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index e371e079e2c50..663de6421eda2 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -103,10 +103,6 @@ config KVM_MMU_LOCKLESS_AGING config KVM_MEMORY_ATTRIBUTES bool -config KVM_VM_MEMORY_ATTRIBUTES - select KVM_MEMORY_ATTRIBUTES - bool - config KVM_GUEST_MEMFD select XARRAY_MULTI select KVM_MEMORY_ATTRIBUTES -- 2.54.0.563.g4f69b47b94-goog