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 3D1B04C0427; Thu, 7 May 2026 20:22:53 +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=1778185373; cv=none; b=B+xO/QTdvao6qVjZlfxp7I35GLoW31D5Bd/pJ3Ju/T2FLhMoHDtZw55PJMl1s0IwnoWXLNzjyCIgMi+ol1+jpkGPDaCdsMR1Xj+XPT52+o2Kac/h0OIG+s9Ydhx8K8swE6MBxBA4s/gFl/gPNxmtzG+SPLuf6eSOJkRfGyUh7Ds= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778185373; c=relaxed/simple; bh=1iZUHvV1nAJj+S20+wkMJz59misyAkbJrByqYzbRY5s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=TP+Mr8GHRl9W6kMeWVp/rHQcn827lmI+uFFdbHLLMU95YCTL7/JsAor4vbVWGGK+Rh0EMF4hKTvdd0kleA7k1W1BgHhfTT65LF0nuM+s6u6sf1+w5XaUWYbl6IrfhB/n/JOpelZCtUFrHXeNSJMFdAYbKJdeoo2kYrsm7JvVLKA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Nz3uru72; 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="Nz3uru72" Received: by smtp.kernel.org (Postfix) with ESMTPS id 1FC0EC4AF0F; Thu, 7 May 2026 20:22:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778185373; bh=1iZUHvV1nAJj+S20+wkMJz59misyAkbJrByqYzbRY5s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=Nz3uru72CSrBDALFFjKZ/1vxnaJ0hKszHHNhQaHaCOjJXC+nU4OBdLgfON4nfYFnL XZN4w/T6e9Fga8vlP7SCEUU9MRg/TxGJC7CenPKZHjueJvXYLOQZ4sA07Yq/ENpws2 K55V98K5UTqSLJExIhi0PHlxwpnT+o/Ai6MWlx6KYvi7Up811YBAwCObz/RQvJGtuW NJ4LXjQnJinlTSJAiukdL38SmvoP1GcYLlM0ZKTm8mbtG3SUa428wkKmEzx4syF1aw gxohbFtG9TSqEhd5gRGp/deWQASB8w4841MeI30j478j9wH4J0eaHjXOyl7hG7peG+ TnJiffZwh1Eig== 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 0D1ECCD37AD; Thu, 7 May 2026 20:22:53 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Thu, 07 May 2026 13:22:57 -0700 Subject: [PATCH v6 38/43] KVM: selftests: Provide common function to set memory attributes 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-v6-38-91ab5a8b19a4@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=2774; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=jmZfY46J7y2Leu9SRzNbI32lb9j/HWWUaawmFVaRNAQ=; b=3soo/y7LDycbDXw/5KVOyC4jjl8VC0kBHTb4LZv7r5Rfv+oQ9H6TWYLsjny4w59AA5NcFkEjZ DpEq28y2KykCJhatuGgutpq/MYg2mYLMdfciFk2Hlw3CazMdFMP1vMV 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 Introduce vm_mem_set_memory_attributes(), which handles setting of memory attributes for a range of guest physical addresses, regardless of whether the attributes should be set via guest_memfd or via the memory attributes at the VM level. Refactor existing vm_mem_set_{shared,private} functions to use the new function. Opportunistically update the size parameter to use size_t instead of u64. Signed-off-by: Sean Christopherson Co-developed-by: Ackerley Tng Signed-off-by: Ackerley Tng --- tools/testing/selftests/kvm/include/kvm_util.h | 46 +++++++++++++++++++------- 1 file changed, 34 insertions(+), 12 deletions(-) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 4ad184ce3df68..dc70c6da63fa9 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -454,18 +454,6 @@ static inline void vm_set_memory_attributes(struct kvm_vm *vm, gpa_t gpa, vm_ioctl(vm, KVM_SET_MEMORY_ATTRIBUTES, &attr); } -static inline void vm_mem_set_private(struct kvm_vm *vm, gpa_t gpa, - u64 size) -{ - vm_set_memory_attributes(vm, gpa, size, KVM_MEMORY_ATTRIBUTE_PRIVATE); -} - -static inline void vm_mem_set_shared(struct kvm_vm *vm, gpa_t gpa, - u64 size) -{ - vm_set_memory_attributes(vm, gpa, size, 0); -} - static inline int __gmem_set_memory_attributes(int fd, loff_t offset, size_t size, u64 attributes, loff_t *error_offset) @@ -534,6 +522,40 @@ static inline void gmem_set_shared(int fd, loff_t offset, size_t size) gmem_set_memory_attributes(fd, offset, size, 0); } +static inline void vm_mem_set_memory_attributes(struct kvm_vm *vm, gpa_t gpa, + size_t size, u64 attrs) +{ + if (kvm_has_gmem_attributes) { + gpa_t end = gpa + size; + off_t fd_offset; + gpa_t addr; + size_t len; + int fd; + + for (addr = gpa; addr < end; addr += len) { + fd = kvm_gpa_to_guest_memfd(vm, addr, &fd_offset, &len); + len = min(end - addr, len); + + gmem_set_memory_attributes(fd, fd_offset, len, attrs); + } + } else { + vm_set_memory_attributes(vm, gpa, size, attrs); + } +} + +static inline void vm_mem_set_private(struct kvm_vm *vm, gpa_t gpa, + size_t size) +{ + vm_mem_set_memory_attributes(vm, gpa, size, + KVM_MEMORY_ATTRIBUTE_PRIVATE); +} + +static inline void vm_mem_set_shared(struct kvm_vm *vm, gpa_t gpa, + size_t size) +{ + vm_mem_set_memory_attributes(vm, gpa, size, 0); +} + void vm_guest_mem_fallocate(struct kvm_vm *vm, gpa_t gpa, u64 size, bool punch_hole); -- 2.54.0.563.g4f69b47b94-goog