From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=pass header.oldest-pass=0 smtp.remote-ip=100.103.45.18 ARC-Seal: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=pass; t=1794011843; b=dELsmD/I+rt3cLVnA+Q2/y0iaxswfiONgVOGPhzm/4Y+QvjJACGXGxcHtGDN/t6u96yY chHa8IbY9FTLRC+IELDEdrKll6hswo8w4R3WJt8TipAktRGnLe1ALs7HOS6dsOvn83aOY PEwUSpugiXsTElvaZjAjtE+WPXa4hKG5ddjCuu2NXNP1t5i8qpOIUgL8g98xwfO5LqMNm PkugwHSeuDTTp3QCSFaDivW0dqfiS8bGky7KprTsYlUfX5Kea8oApRnetx4jXTWNnYX/o oTs3V16lF88HyQsNthbB8Mjr5Gk6kUVfNuIhfEIsGSv/2j5WS9mrpgWN0nSwG9kiKww== ARC-Message-Signature: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794011843; h=Received:DKIM-Signature:Received:From:Date:Subject:MIME-Version: Content-Type:Message-Id:References:In-Reply-To:To:Cc:X-Mailer: X-Developer-Signature:X-Developer-Key:X-Endpoint-Received: X-Original-From:Reply-To:Content-Transfer-Encoding; bh=pkX5RglPGJDEhnslhp8xP4OHF0T6ris68N5dtaSSV90=; b=GS+27fPAprRbjsnNfPfLTWmHDNb7bqk0VgngwtqNFlTmTCzkAcXdmVbFIxzfOSEark3B HFb66/200TBup+1OZznrPEqHm0GVefVXSUrrG8vdjNO/7ZWAUmjVWMU0WXbcsvxBCJWs8 UX0C23kSi5POhfu/bN/ZtiuPw/TFDWo4E1I2SvY0HOwI0qYZK3iFIUZI8XA2yh1kfw2IQ 9uHdY5CAXvu0t242eopez0Gt0acC2VAst/ZNYul3+0BRWybRc+QzpvUJQZwFL/fCezuBA 9nmkxutzOxc67TXzcKQGiLxzKkbxX+pUkGAorgYnv1nixDoRjo59fNr0jDLDkePwqNA== ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="IK/m6TYo"; arc=pass header.oldest-pass=0 smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77B47606A824; Sat, 7 Nov 2026 00:37:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=IK/m6TYo Authentication-Results: smtp.kernel.org; arc=none smtp.remote-ip=100.80.115.77 ARC-Seal: i=1; d=kernel.org; s=arc20260519; a=rsa-sha256; cv=none; t=1794011838; b=jIhZc3YtIfe5cGjupmPKguq3MIOc4IViaBNarp0kezszBSIFeD+vPD8seCd1Al+3SJEO VR34ACWL7VVY8kCdC65950LNEgqgK1t+Ly18bwxDs5JBsTmc04v4dh+6cPoOy+LUtpDhF nJmORB1n0eS6nCeZ9g27wqIPq/rXu7vM+0Kjcq2fDBsyVMOt3akP9k2chiNCyG8UAKJQn UTzsv8hJ7DEa/H66j6Aq8t78biqBmEc0nIUV5QN7Rr2vqpfzJ2hqMunHEsEV0nznp5yzH 7cPKLI+RD0ckxbb/xKrYqV5c7dl6ZYEJCRheBpen4BrhwrmCgQmvgdVCL0UzQh12N7g== ARC-Message-Signature: i=1; d=kernel.org; s=arc20260519; a=rsa-sha256; c=relaxed/relaxed; t=1794011838; h=DKIM-Signature:Received:From:Date:Subject:MIME-Version:Content-Type: Message-Id:References:In-Reply-To:To:Cc:X-Mailer: X-Developer-Signature:X-Developer-Key:X-Endpoint-Received: X-Original-From:Reply-To:Content-Transfer-Encoding; bh=pkX5RglPGJDEhnslhp8xP4OHF0T6ris68N5dtaSSV90=; b=znU0U+Bvk6MTU7HjAJKMKPgZMxkvgaHbhXJJOQhopEd4l3ntegVilnlcOKygdcedpREH dRU1Y4TXK50KyaDv52X3RTTIl7V6EUcaH8vuRKYA57BOSC7sRaAbcVNL+k+8rOo3FpeBB mzd5aaiah9WMFQ8JOZ7yHd2T+upw8XvoSTOpr1ooVRWkFQPsGYvFkU7425vcqD/RvQSUC VeC4fktfigpFXrrZfYM8pxGrDhBaKMhNz/XCjOpjmSvcFCy36u+2alrlTveh75ZLgTEgJ OM76TdLjoRpoEX0YpFSg3vsSnxkllePOTWARQa5ymFaFOPMdVADiDZmJOYDN7hFD+Dg== ARC-Authentication-Results: i=1; smtp.kernel.org; arc=none smtp.remote-ip=100.80.115.77 Received: from lkml.kernel.org (nexus.subspace.kernel.org [100.80.115.77]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.kernel.org (Postfix) with ESMTPS id 1F5AB1F00925; Sat, 7 Nov 2026 00:37:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794011838; bh=pkX5RglPGJDEhnslhp8xP4OHF0T6ris68N5dtaSSV90=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To; b=IK/m6TYodvJPSVDageZXSBAYTxQxbGrpYMBiiX865Fpf4W5Xl9gj22vVhvpjq0Ve7 bCe04St6ikuvo9AjP6+boQR7205VjcIvKyvfudmdaD/gH9zidXt+LF1/gDbsTxcp8l r8BEC4wBThd9pPL8u8Xy9T9/0PHLU+fc7PUqhEB5HnpJAWFOwmw91kI45v5o1/tww+ KbSjbMNLOPJkZsZuK25UYWA0muMoflzeKQOTXbSznzaMQJnzMN2JAPjZGpvKk7ytKj INtVQhNY88zlGGVQZtp0bOlJbHKQmbxSu6/7FUK0IBpZCKclHC8ot5C9pwEWX4kKxk GMS3EHMSEy06Q== Received: from nexus.subspace.kernel.org (localhost [IPv6:::1]) by lkml.kernel.org (Postfix) with ESMTP id 708A547A55; Sat, 7 Nov 2026 00:36:58 +0000 (UTC) From: Ackerley Tng via B4 Relay Date: Fri, 06 Nov 2026 16:37:57 -0800 Subject: [PATCH RFC v3 83/88] KVM: selftests: Verify VFIO ioeventfd creation for igb device X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Message-Id: <20261106-gmem-alternative-providers-v3-83-8484dde66a7e@google.com> References: <20261106-gmem-alternative-providers-v3-0-8484dde66a7e@google.com> In-Reply-To: <20261106-gmem-alternative-providers-v3-0-8484dde66a7e@google.com> To: Alexey Kardashevskiy , "Aneesh Kumar K.V" , Christian Brauner , David Hildenbrand , David Woodhouse , Fred Griffoul , Jacob Pan , Jianxiong Gao , John Starks , Michael Roth , Paolo Bonzini , Samiullah Khawaja , Sean Christopherson , Suzuki K Poulose , Tarun Sahu , Vishal Annapurve , Xu Yilun , Fuad Tabba Cc: kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, Ackerley Tng X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1794011810; l=2410; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=lOTB0T1ZgH2qBwxbzF1p5KVxU2nrnnE76xPmcwyhgYk=; b=dWWgKLHu4omBOrcbWgEzhyA8WgLPlocfMYQX0wM811XEqldFlmfdRwW/DSH6jtFRb5JzYUcHE Z8Q/wpLQ65VBYUKMm9/i2vELQblt1W1Vak0UmJun4RPZLtCa7JjWqVb 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 Content-Transfer-Encoding: 7bit From: Ackerley Tng Add a subtest to verify ioeventfd registration and unregistration on the bound Intel 82576 device. Allocate an eventfd and configure a VFIO_DEVICE_IOEVENTFD ioctl targeting the scratch receive address low (RAL0) register in BAR0 with 4-byte width and a test trigger value. Assert that in direct mode registration succeeds and that unregistration (passing fd = -1 with matching register criteria) succeeds cleanly. In guest_memfd mode, verify that ioeventfd registration is rejected with -EOPNOTSUPP. Signed-off-by: Ackerley Tng --- .../selftests/kvm/x86/guest_memfd_vfio_test.c | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/tools/testing/selftests/kvm/x86/guest_memfd_vfio_test.c b/tools/testing/selftests/kvm/x86/guest_memfd_vfio_test.c index 46d325228bda3..dde249571ebc4 100644 --- a/tools/testing/selftests/kvm/x86/guest_memfd_vfio_test.c +++ b/tools/testing/selftests/kvm/x86/guest_memfd_vfio_test.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -725,4 +726,42 @@ TEST_F(guest_memfd_vfio, dmabuf_creation) free(feat); } +TEST_F(guest_memfd_vfio, ioeventfd_creation) +{ + struct vfio_device_ioeventfd ioeventfd = {}; + struct vfio_region_info bar0_info = {}; + int ret; + int efd; + + bar0_info.argsz = sizeof(bar0_info); + bar0_info.index = VFIO_PCI_BAR0_REGION_INDEX; + ret = ioctl(self->vfio_fd, VFIO_DEVICE_GET_REGION_INFO, &bar0_info); + ASSERT_EQ(0, ret); + + efd = eventfd(0, EFD_CLOEXEC); + ASSERT_GE(efd, 0); + + /* Register ioeventfd on BAR0 targeting RAL0 with 4-byte width */ + ioeventfd.argsz = sizeof(ioeventfd); + ioeventfd.flags = VFIO_DEVICE_IOEVENTFD_32; + ioeventfd.offset = bar0_info.offset + E1000_RAL0; + ioeventfd.data = 0xdeadbeef; + ioeventfd.fd = efd; + + ret = ioctl(self->vfio_fd, VFIO_DEVICE_IOEVENTFD, &ioeventfd); + if (variant->use_gmem) { + ASSERT_LT(ret, 0); + ASSERT_EQ(EOPNOTSUPP, errno); + } else { + ASSERT_EQ(0, ret); + + /* Unregister ioeventfd by passing fd = -1 with identical match criteria */ + ioeventfd.fd = -1; + ret = ioctl(self->vfio_fd, VFIO_DEVICE_IOEVENTFD, &ioeventfd); + ASSERT_EQ(0, ret); + } + + close(efd); +} + TEST_HARNESS_MAIN -- 2.56.0.455.g6c5a503b38-goog