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 81B0E30ACF1; Sat, 23 May 2026 00:18:06 +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=1779495486; cv=none; b=PSeNBBLPaAEP2LpDciWULyxU64EAffG6cek0UsjAm0/Sq314Utf+H9YVirBryXwSfzP3taLIh7PPuow9+clegT5mBzTKXwfcERg/UwhPCWuEhwh055y/hAw5tVGR410sLQY9fsx1coNTmPr0r3O2z6P0Era8gaVcIOHealwTgck= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779495486; c=relaxed/simple; bh=Q8lbBPgRJXNA5L+vYUPh8gDXblwem5U0MuYJZNaNPQA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=BFD8oy076+bypnaptTJCIvP+u8qBwsX6qogc9gaUBHmbx3UK25DDvjVvjASV0go9ZQNRw7DW2JS95ECw0TD7oKM5w7GLDonP1jXAPIx8vT6yN7SJczvjXDd3F5nh61vIkR0SMXHvYoLmh1rrZxe5LspInWrLcdVPW2B1k/FdgJQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Va64V7bb; 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="Va64V7bb" Received: by smtp.kernel.org (Postfix) with ESMTPS id E4203C4DDFB; Sat, 23 May 2026 00:18:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1779495486; bh=Q8lbBPgRJXNA5L+vYUPh8gDXblwem5U0MuYJZNaNPQA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=Va64V7bbtTOXTUzda3rgNurGvGKuRBMTA+gr3mT9LdMk9Ht6w9EunT8hyT4z5cc4e yUBhtNtl9VHeDtaKrAUubVoftZIwZLe67nGkf2S6nS95zY+/cWH7POSS9A6y63GaBr Wt6SzQ0utNYp3lEjxVMBQ0soOHRxRvG2tB6qr62EgWZ0jgVTnPwZthf8xty84GfzdE PEgq/StfH8rzO0RciFYBNYkAxJOrRu6kyx1BYqEfWR1EQ92OecA3yPyeeVJO2k0jiG 9MEm32mC3kf+840aBTZDN/CsFZdM5ZjLX9p5UvKrHQzFK0F0XU2xbi7il2SRFZ+TMR FS46iQbsv/6wQ== 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 CA67BCD4F3D; Sat, 23 May 2026 00:18:05 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Fri, 22 May 2026 17:18:12 -0700 Subject: [PATCH v7 30/42] KVM: selftests: Test conversion before allocation 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: <20260522-gmem-inplace-conversion-v7-30-2f0fae496530@google.com> References: <20260522-gmem-inplace-conversion-v7-0-2f0fae496530@google.com> In-Reply-To: <20260522-gmem-inplace-conversion-v7-0-2f0fae496530@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=1779495480; l=1723; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=JzD5LvrkFUmev9w80enRAiy18v+nCMDdHoBY5OqWDOk=; b=j8dqrAIEN9jtQXXFjBc8OtJrWmx1kgYpbYnu0fzv43AGafhPF+EiRAyx5upLVbp2dvCtb11Kn kEVF6RBRakKBTSKKxfagcmaP7irU9b622tcnj0AWbsQHWWQwnaBD7P/ 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. Signed-off-by: Ackerley Tng Co-developed-by: Sean Christopherson Signed-off-by: Sean Christopherson --- .../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 8e17d5c08aeb8..b43ac196330f1 100644 --- a/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c +++ b/tools/testing/selftests/kvm/x86/guest_memfd_conversions_test.c @@ -265,6 +265,20 @@ 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)); -- 2.54.0.794.g4f17f83d09-goog