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 4DC5D3CA487; Thu, 10 Sep 2026 23:55:40 +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=1789084540; cv=none; b=PIxPX7YZDdui37hwWZ9rb4YppiS4vfZLsjId3kitZAXOd8ZBJP5xwEkgo6m56blZAc4C1fSY7wINMDaN68R/Wic7nIoDHyAkzYeqG8wnU5pMzmrQojOe/gROdd4ODKS6BdnvQpyb3Zi+2zCbjH3e2I5+uS1m+RcxTQlUzBQHujw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789084540; c=relaxed/simple; bh=IbvsCeECqLpAFLA4lW2aKkT7BsDLcy8ynt0OyYVtkDU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=IjbA0qliBwXN7/OMb7Hl784pAr3jrdqkEKSafCKGgpc02sObZbAvc1d6blkAsTngMVK40YwI4FpJ3NRt0/oYYtRc5a440d5Rf/MWzN6xSTLLWS8PaS/Z+WWeqtVlXiVeADfa3FgwpA/ZOHFyPL7IMeIS0cd3n8K25GZgEfDkqWM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rWWgBS3i; 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="rWWgBS3i" Received: by smtp.kernel.org (Postfix) with ESMTPS id 02D02C2BCFB; Thu, 10 Sep 2026 23:55:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1789084540; bh=IbvsCeECqLpAFLA4lW2aKkT7BsDLcy8ynt0OyYVtkDU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=rWWgBS3iHSd06REJIMRGF4K/NYNMx/SSZIpA16hC8kr/9siZYFlcI6dmtFjir7vNd kAyZKfKUIAtTFq75CdS+FFjtQPAgWNbBZQl8PeR9tOWsmR9oDIFMzg07p9WDFRo8PS 67Ou6gNc878Uuwr2Aj0NMi7zphCqQXD0rMHWdlzFJSSB5a9wcwXtfzy4oHDrWMZ8hL je4tsVlFB60rJ8IMmDmAwhqX9rbXQfgK4TzbThSCH6wdVrfG0IU5+8oA8inx4o1tKj recdineZDRIaJ9S8/MShtwnhNsALcIoc0TLA1r8F/jy+Pn5kcnrLIbp28fxtgYNULF 2fcTTGwK8n/zQ== 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 E28C0C88E4C; Thu, 10 Sep 2026 23:55:39 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Thu, 10 Sep 2026 16:55:58 -0700 Subject: [PATCH v13 32/44] KVM: selftests: Test conversion before allocation Precedence: bulk X-Mailing-List: kvm@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: <20260910-gmem-inplace-conversion-v13-32-dd6fbf94f4e1@google.com> References: <20260910-gmem-inplace-conversion-v13-0-dd6fbf94f4e1@google.com> In-Reply-To: <20260910-gmem-inplace-conversion-v13-0-dd6fbf94f4e1@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, 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, Randy Dunlap , Lorenzo Stoakes , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jason Gunthorpe , Fuad Tabba , 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=1789084533; l=1812; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=98GD8e5loqEnXNVFPjaeOasgv+hm0t7FDCQbewQpebI=; b=n2YWnfFCUr/68G9CJiIyjPa+YiRgiDobEcV20zejrZ3jz0tklSJMSvQm+CRKttBAvNjajh/S+ xM1eV9OODsEBbzk78S7e3dwOiEOZnLFdXCpQbWG1k641W/Y7yG0/5zb 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 Add two test cases to the guest_memfd conversions selftest to cover the scenario where a conversion is requested before any memory has been allocated in the guest_memfd region. The KVM_SET_MEMORY_ATTRIBUTES2 ioctl can be called on a memory region at any time. If the guest had not yet faulted in any pages for that region, the kernel must record the conversion request and apply the requested state when the pages are eventually allocated. The new tests cover both conversion directions. Co-developed-by: Sean Christopherson Signed-off-by: Sean Christopherson Signed-off-by: Ackerley Tng Tested-by: Shivank Garg Reviewed-by: Fuad Tabba --- .../selftests/kvm/x86/guest_memfd_conversions_test.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c b/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c index a8d89df53e46d..f46f1530a94b9 100644 --- a/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c +++ b/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c @@ -268,6 +268,20 @@ GMEM_CONVERSION_MULTIPAGE_TEST_INIT_SHARED(indexing, 4) #undef combine } +/* + * Test that even if there are no folios yet, conversion requests are recorded + * in guest_memfd. + */ +GMEM_CONVERSION_TEST_INIT_SHARED(before_allocation_shared) +{ + test_convert_to_private(t, 0, 0, 'A'); +} + +GMEM_CONVERSION_TEST_INIT_PRIVATE(before_allocation_private) +{ + test_convert_to_shared(t, 0, 0, 'A', 'B'); +} + int main(int argc, char *argv[]) { TEST_REQUIRE(kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM)); -- 2.55.0.1007.g17ff1f9808-goog