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 57509472782; Fri, 7 Aug 2026 21:52:50 +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=1786139570; cv=none; b=HKmyoqer1zSo3r/rp0iuzfftqlzlhgj14hSo0jP5ckBIzr6s4bNwQZ8nOMYdKloDo5IyNVs3Q5NRgq7/DJLlphwRZe8dItu+XZi9m68/44kkCVidIgDsJyLeXA5leLHVPQNC8tbdilF+GUeVyzJHZVOey50PLn2VfgY1jm0cAjQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786139570; c=relaxed/simple; bh=C5CVQyQCx6nCpVtedkg6HikJiLO1rkwgWitCM8srGsY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=GpjfLraFyHmp+sD04hsYDKStdpCEZSRdlGFbmwBnBFReEjwfmx1yBQ9r3eSyMV0hdj7/0hN9LbKhZsMpHIj0BeLUQ3asAsUZINFQv9FWMutr/Sjl+NiIVyqpQXlL1mnzxulFHRxr7k3xJ8nlDKOOHzMerw+uX+5rqKj1s3V4VAU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fEvezCsY; 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="fEvezCsY" Received: by smtp.kernel.org (Postfix) with ESMTPS id 3D33BC2BD04; Fri, 7 Aug 2026 21:52:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1786139570; bh=C5CVQyQCx6nCpVtedkg6HikJiLO1rkwgWitCM8srGsY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=fEvezCsYmyZOutO3WXtcxrr8CONdjwM67HmL91GoXn1HO85SvszGj1L9gQ8EF+wEZ d/Oi6N2VEb7Q3Po/iX2KeJQzIyqRJrTT3+2EPBXwNunKpTdUlrlzLQ0grDvMin3gy2 dMhSbclcQQj4qw6w2n31UIksGY4GRHpgUCksm7xApUEXEj8wRVBJpO9DCc5vEfKhf8 GnviTfbQcn7VFWH2/aEu4FMcy++InvFn1V26TgPf8FI2oekk2/Ky9IJRRcciarrpSY 4k/za8wiYXghgUrUmZdfRpGxAzfIfHFd/9qNQTghskNGdwZcjCqTPaE0W+9RHjKNgw o87z2WXavyYkg== 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 2A3ECC5ACD4; Fri, 7 Aug 2026 21:52:50 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Fri, 07 Aug 2026 14:53:04 -0700 Subject: [PATCH v10 25/41] KVM: selftests: Add selftests global for guest memory attributes capability 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: <20260807-gmem-inplace-conversion-v10-25-2fc18ee6d3ba@google.com> References: <20260807-gmem-inplace-conversion-v10-0-2fc18ee6d3ba@google.com> In-Reply-To: <20260807-gmem-inplace-conversion-v10-0-2fc18ee6d3ba@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 , tarunsahu@google.com, 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=1786139565; l=2380; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=3GsT3Q+uzPs3OFHloNtQiW2tkzSuSXtysLhAUwWt/P8=; b=I33/mpDT6f2dWZmUfYdILExsu+k524V3mzokxxFBxqlwcLsoItV2gj57r9VTM33XoZcVk7IL+ xFmO2by1pElB2bRcy5kRmrGwveZe/kWi/2LSvaPOnLbueytk2lcwrLi 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 Add a global variable, kvm_has_gmem_attributes, to make the result of checking for KVM_CAP_GUEST_MEMFD_MEMORY_ATTRIBUTES available to all tests. kvm_has_gmem_attributes is true if guest_memfd tracks memory attributes, as opposed to VM-level tracking. This global variable is synced to the guest for testing convenience, to avoid introducing subtle bugs when host/guest state is desynced. Signed-off-by: Sean Christopherson Reviewed-by: Fuad Tabba Tested-by: Shivank Garg Signed-off-by: Ackerley Tng --- tools/testing/selftests/kvm/include/test_util.h | 2 ++ tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h index a6a3e16578959..d5825211f2727 100644 --- a/tools/testing/selftests/kvm/include/test_util.h +++ b/tools/testing/selftests/kvm/include/test_util.h @@ -116,6 +116,8 @@ struct kvm_random_state { extern u32 kvm_random_seed; extern struct kvm_random_state kvm_rng; +extern bool kvm_has_gmem_attributes; + struct kvm_random_state new_kvm_random_state(u32 seed); u32 kvm_random_u32(struct kvm_random_state *state); diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 08d0bbcd421ea..cd468b2bb8343 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -32,6 +32,8 @@ static void kvm_seed_rng(u32 seed) kvm_rng = new_kvm_random_state(kvm_random_seed); } +bool kvm_has_gmem_attributes; + static size_t vcpu_mmap_sz(void); int __open_path_or_exit(const char *path, int flags, const char *enoent_help) @@ -527,6 +529,7 @@ struct kvm_vm *__vm_create(struct vm_shape shape, u32 nr_runnable_vcpus, kvm_seed_rng(kvm_random_seed); sync_global_to_guest(vm, kvm_rng); + sync_global_to_guest(vm, kvm_has_gmem_attributes); kvm_arch_vm_post_create(vm, nr_runnable_vcpus); @@ -2311,6 +2314,8 @@ void __attribute((constructor)) kvm_selftest_init(void) srandom(time(0)); kvm_seed_rng(random()); + kvm_has_gmem_attributes = kvm_has_cap(KVM_CAP_GUEST_MEMFD_MEMORY_ATTRIBUTES); + kvm_selftest_arch_init(); } -- 2.55.0.654.g21b8a5bc05-goog