From patchwork Thu Feb 17 11:37:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steffen Eiden X-Patchwork-Id: 12749922 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56EF7C433EF for ; Thu, 17 Feb 2022 12:00:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240134AbiBQMAx (ORCPT ); Thu, 17 Feb 2022 07:00:53 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:48846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240153AbiBQMAw (ORCPT ); Thu, 17 Feb 2022 07:00:52 -0500 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1A03D294126; Thu, 17 Feb 2022 04:00:38 -0800 (PST) Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 21HBcEaJ017018; Thu, 17 Feb 2022 12:00:35 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=rVsHs3Q8FHfqVNAvarBSftdHM16N1tVkoFIJxg8spLQ=; b=sSgAzLaBXvhf3xv7f7nKdVym8gGm7mSVW3XdbMGObeHXt55FDSW0yPN06vqakUUbvMlb tUbDZq0CvI1KNdqmEz3a11fQhe00UnLtEdsZdGYx96p8i2YmY5xBlWWvF/k3uxw3mjjc Vg0HxuxC8S4tkXC+WJqhmjLOi6L/Unn0iE90lciCBN1kpEjmi0Geho9F8XUdoexugROC Umf5x94/qim2wTq2R8GM9XQowCcFBwn3uDrnPbbkvmst/tNoD7zeJAx9sBFv6HcqC66Y TNkOucQz1rd728PTsDF6pkY/HdIGDvjmJbC0BglZc1Kl0MgHetktj6JeduwGaXgUhJOT yg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e9m1yjrx0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 12:00:35 +0000 Received: from m0127361.ppops.net (m0127361.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 21HBdaMj022969; Thu, 17 Feb 2022 12:00:34 GMT Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e9m1yjrrs-5 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 12:00:34 +0000 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 21HBas10017644; Thu, 17 Feb 2022 11:37:24 GMT Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by ppma04ams.nl.ibm.com with ESMTP id 3e64hahbm9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 11:37:24 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 21HBbKTm43974914 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 17 Feb 2022 11:37:20 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AA33552051; Thu, 17 Feb 2022 11:37:20 +0000 (GMT) Received: from localhost.localdomain (unknown [9.114.12.92]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 756095205F; Thu, 17 Feb 2022 11:37:19 +0000 (GMT) From: Steffen Eiden To: Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Janosch Frank , David Hildenbrand , Claudio Imbrenda , Shuah Khan , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 1/3] drivers/s390/char: Add Ultravisor io device Date: Thu, 17 Feb 2022 06:37:15 -0500 Message-Id: <20220217113717.46624-2-seiden@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220217113717.46624-1-seiden@linux.ibm.com> References: <20220217113717.46624-1-seiden@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: zw0Oq60hrGRYHiZt4Cf4YWt-3deY-GN8 X-Proofpoint-ORIG-GUID: tE__OvT4PFGPu1O-OzOo0pOif1I3GI6L X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-17_04,2022-02-17_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 malwarescore=0 mlxlogscore=999 bulkscore=0 priorityscore=1501 phishscore=0 impostorscore=0 mlxscore=0 clxscore=1015 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202170051 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This patch adds a new miscdevice to expose some Ultravisor functions to userspace. Userspace can send IOCTLis to the uvdevice that will then emit a corresponding Ultravisor Call and hands the result over to userspace. The uvdevice is available if the Ultravisor Call facility is present. Userspace is now able to call the Query Ultravisor Information Ultravisor Command through the uvdevice. Signed-off-by: Steffen Eiden --- MAINTAINERS | 2 + arch/s390/include/uapi/asm/uvdevice.h | 27 +++++ drivers/s390/char/Kconfig | 9 ++ drivers/s390/char/Makefile | 1 + drivers/s390/char/uvdevice.c | 162 ++++++++++++++++++++++++++ 5 files changed, 201 insertions(+) create mode 100644 arch/s390/include/uapi/asm/uvdevice.h create mode 100644 drivers/s390/char/uvdevice.c diff --git a/MAINTAINERS b/MAINTAINERS index 5250298d2817..c7d8d0fe48cf 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10457,9 +10457,11 @@ F: Documentation/virt/kvm/s390* F: arch/s390/include/asm/gmap.h F: arch/s390/include/asm/kvm* F: arch/s390/include/uapi/asm/kvm* +F: arch/s390/include/uapi/asm/uvdevice.h F: arch/s390/kernel/uv.c F: arch/s390/kvm/ F: arch/s390/mm/gmap.c +F: drivers/s390/char/uvdevice.c F: tools/testing/selftests/kvm/*/s390x/ F: tools/testing/selftests/kvm/s390x/ diff --git a/arch/s390/include/uapi/asm/uvdevice.h b/arch/s390/include/uapi/asm/uvdevice.h new file mode 100644 index 000000000000..f2e4984a6e2e --- /dev/null +++ b/arch/s390/include/uapi/asm/uvdevice.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Copyright IBM Corp. 2022 + * Author(s): Steffen Eiden + */ +#ifndef __S390X_ASM_UVDEVICE_H +#define __S390X_ASM_UVDEVICE_H + +#include + +struct uvio_ioctl_cb { + __u32 flags; /* Currently no flags defined, must be zero */ + __u16 uv_rc; /* UV header rc value */ + __u16 uv_rrc; /* UV header rrc value */ + __u64 argument_addr; /* Userspace address of uvio argument */ + __u32 argument_len; + __u8 reserved14[0x40 - 0x14]; /* must be zero */ +}; + +#define UVIO_QUI_MAX_LEN 0x8000 + +#define UVIO_DEVICE_NAME "uv" +#define UVIO_TYPE_UVC 'u' + +#define UVIO_IOCTL_QUI _IOWR(UVIO_TYPE_UVC, 0x01, struct uvio_ioctl_cb) + +#endif /* __S390X_ASM_UVDEVICE_H */ diff --git a/drivers/s390/char/Kconfig b/drivers/s390/char/Kconfig index 6cc4b19acf85..933c0d0062d6 100644 --- a/drivers/s390/char/Kconfig +++ b/drivers/s390/char/Kconfig @@ -184,3 +184,12 @@ config S390_VMUR depends on S390 help Character device driver for z/VM reader, puncher and printer. + +config UV_UAPI + def_tristate m + prompt "Ultravisor userspace API" + depends on PROTECTED_VIRTUALIZATION_GUEST + help + Selecting exposes parts of the UV interface to userspace + by providing a misc character device. Using IOCTLs one + can interact with the UV. diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile index c6fdb81a068a..b5c83092210e 100644 --- a/drivers/s390/char/Makefile +++ b/drivers/s390/char/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_MONREADER) += monreader.o obj-$(CONFIG_MONWRITER) += monwriter.o obj-$(CONFIG_S390_VMUR) += vmur.o obj-$(CONFIG_CRASH_DUMP) += sclp_sdias.o zcore.o +obj-$(CONFIG_UV_UAPI) += uvdevice.o hmcdrv-objs := hmcdrv_mod.o hmcdrv_dev.o hmcdrv_ftp.o hmcdrv_cache.o diag_ftp.o sclp_ftp.o obj-$(CONFIG_HMC_DRV) += hmcdrv.o diff --git a/drivers/s390/char/uvdevice.c b/drivers/s390/char/uvdevice.c new file mode 100644 index 000000000000..e8efcbf0e7ab --- /dev/null +++ b/drivers/s390/char/uvdevice.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright IBM Corp. 2022 + * Author(s): Steffen Eiden + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt ".\n" + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +/** + * uvio_qui() - Perform a Query Ultravisor Information UVC. + * + * uv_ioctl: ioctl control block + * + * uvio_qui() does a Query Ultravisor Information (QUI) Ultravisor Call. + * It creates the uvc qui request and sends it to the Ultravisor. After that + * it copies the response to userspace and fills the rc and rrc of uv_ioctl + * uv_call with the response values of the Ultravisor. + * + * Create the UVC structure, send the UVC to UV and write the response in the ioctl struct. + * + * Return: 0 on success or a negative error code on error. + */ +static int uvio_qui(struct uvio_ioctl_cb *uv_ioctl) +{ + u8 __user *user_buf_addr = (__user u8 *)uv_ioctl->argument_addr; + size_t user_buf_len = uv_ioctl->argument_len; + struct uv_cb_header *uvcb_qui = NULL; + int ret; + + /* + * Do not check for a too small buffer. If userspace provides a buffer + * that is too small the Ultravisor will complain. + */ + ret = -EINVAL; + if (!user_buf_len || user_buf_len > UVIO_QUI_MAX_LEN) + goto out; + ret = -ENOMEM; + uvcb_qui = kvzalloc(user_buf_len, GFP_KERNEL); + if (!uvcb_qui) + goto out; + uvcb_qui->len = user_buf_len; + uvcb_qui->cmd = UVC_CMD_QUI; + + uv_call(0, (u64)uvcb_qui); + + ret = -EFAULT; + if (copy_to_user(user_buf_addr, uvcb_qui, uvcb_qui->len)) + goto out; + uv_ioctl->uv_rc = uvcb_qui->rc; + uv_ioctl->uv_rrc = uvcb_qui->rrc; + + ret = 0; +out: + kvfree(uvcb_qui); + return ret; +} + +static int uvio_copy_and_check_ioctl(struct uvio_ioctl_cb *ioctl, void __user *argp) +{ + u64 sum = 0; + u64 i; + + if (copy_from_user(ioctl, argp, sizeof(*ioctl))) + return -EFAULT; + if (ioctl->flags != 0) + return -EINVAL; + for (i = 0; i < ARRAY_SIZE(ioctl->reserved14); i++) + sum += ioctl->reserved14[i]; + if (sum) + return -EINVAL; + + return 0; +} + +static int uvio_dev_open(struct inode *inode, struct file *filp) +{ + return 0; +} + +static int uvio_dev_close(struct inode *inodep, struct file *filp) +{ + return 0; +} + +/* + * IOCTL entry point for the Ultravisor device. + */ +static long uvio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + struct uvio_ioctl_cb *uv_ioctl; + long ret; + + ret = -ENOMEM; + uv_ioctl = vzalloc(sizeof(*uv_ioctl)); + if (!uv_ioctl) + goto out; + + switch (cmd) { + case UVIO_IOCTL_QUI: + ret = uvio_copy_and_check_ioctl(uv_ioctl, argp); + if (ret) + goto out; + ret = uvio_qui(uv_ioctl); + break; + default: + ret = -EINVAL; + break; + } + if (ret) + goto out; + + if (copy_to_user(argp, uv_ioctl, sizeof(*uv_ioctl))) + ret = -EFAULT; + + out: + vfree(uv_ioctl); + return ret; +} + +static const struct file_operations uvio_dev_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = uvio_ioctl, + .open = uvio_dev_open, + .release = uvio_dev_close, + .llseek = no_llseek, +}; + +static struct miscdevice uvio_dev_miscdev = { + .minor = MISC_DYNAMIC_MINOR, + .name = UVIO_DEVICE_NAME, + .fops = &uvio_dev_fops, +}; + +static void __exit uvio_dev_exit(void) +{ + misc_deregister(&uvio_dev_miscdev); +} + +static int __init uvio_dev_init(void) +{ + if (!test_facility(158)) + return -ENXIO; + return misc_register(&uvio_dev_miscdev); +} + +module_init(uvio_dev_init); +module_exit(uvio_dev_exit); + +MODULE_AUTHOR("IBM Corporation"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Ultravisor UAPI driver"); From patchwork Thu Feb 17 11:37:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steffen Eiden X-Patchwork-Id: 12749858 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CEC4C43219 for ; Thu, 17 Feb 2022 11:37:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239922AbiBQLhq (ORCPT ); Thu, 17 Feb 2022 06:37:46 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:45976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239925AbiBQLho (ORCPT ); Thu, 17 Feb 2022 06:37:44 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6528C6AA65; Thu, 17 Feb 2022 03:37:30 -0800 (PST) Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 21HBGjqX025146; Thu, 17 Feb 2022 11:37:28 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=ZnsWf4h41RuxZMqb68FhNXjeTPn10IOM37vwqH7ySYc=; b=hyIaf+VmJvsbIgu6touf4CXVsJf8931zfgg2LNBvsJdXjomH44gr+3K5a5AyPGA1M01g 6tpJ9+AxuiSJKb0gA1VRzbSVWxAREadnOFUx2LFDqtYZ+SYDcETEuZ6W7Q5333M3nfvG dSGSJplaWISU1Xh0uVUin1wh+Nqacw9CtOpreNqDK0jRLj2n20P/U00/lXQoHoeDuDQi HVWCK3xvaZZg90ITOJJ5PDSLeQMnqbPua56hTlRxLG4Edv4HloIEawckopNw7Yqe9lSm v2OX+Dqp5t3nsBQSq+LTCAPeB44jWfFTY9FRXsIi12X1vbdSjDnvA557WB5G7qgkOQSX bQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 3e9nbp8p4j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 11:37:27 +0000 Received: from m0098419.ppops.net (m0098419.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 21HBO3Oa022638; Thu, 17 Feb 2022 11:37:27 GMT Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0b-001b2d01.pphosted.com with ESMTP id 3e9nbp8p3c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 11:37:27 +0000 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 21HBbMkP010622; Thu, 17 Feb 2022 11:37:25 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma06fra.de.ibm.com with ESMTP id 3e645k77tq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 11:37:25 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 21HBQuq749807802 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 17 Feb 2022 11:26:56 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 065EE5205F; Thu, 17 Feb 2022 11:37:22 +0000 (GMT) Received: from localhost.localdomain (unknown [9.114.12.92]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id C683C52054; Thu, 17 Feb 2022 11:37:20 +0000 (GMT) From: Steffen Eiden To: Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Janosch Frank , David Hildenbrand , Claudio Imbrenda , Shuah Khan , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 2/3] drivers/s390/char: Add Ultravisor attestation to uvdevice Date: Thu, 17 Feb 2022 06:37:16 -0500 Message-Id: <20220217113717.46624-3-seiden@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220217113717.46624-1-seiden@linux.ibm.com> References: <20220217113717.46624-1-seiden@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: yhaZ55pWbwnbaRRl1Sr7oQ1W4s8zTug0 X-Proofpoint-GUID: feZzQqMksKZZHIU_yhKjVizghuyk4-5w X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-17_04,2022-02-17_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 bulkscore=0 mlxscore=0 adultscore=0 spamscore=0 impostorscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202170051 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This patch enables userspace to call the Retrieve Attestation Measurement Ultravisor Call using IOCTLs on the uvdevice. The uvdevice will do some sanity checks first. Then, copy the request data to kernel space, build the uvcb, perform the UV call, and copy the result back to userspace. Userspace is now able to call the Retrieve Attestation Measurement Ultravisor Call through the uvdevice. Signed-off-by: Steffen Eiden --- arch/s390/include/asm/uv.h | 23 +++- arch/s390/include/uapi/asm/uvdevice.h | 19 +++ drivers/s390/char/uvdevice.c | 163 ++++++++++++++++++++++++++ 3 files changed, 204 insertions(+), 1 deletion(-) diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h index 72d3e49c2860..648375750259 100644 --- a/arch/s390/include/asm/uv.h +++ b/arch/s390/include/asm/uv.h @@ -2,7 +2,7 @@ /* * Ultravisor Interfaces * - * Copyright IBM Corp. 2019 + * Copyright IBM Corp. 2019, 2022 * * Author(s): * Vasily Gorbik @@ -52,6 +52,7 @@ #define UVC_CMD_UNPIN_PAGE_SHARED 0x0342 #define UVC_CMD_SET_SHARED_ACCESS 0x1000 #define UVC_CMD_REMOVE_SHARED_ACCESS 0x1001 +#define UVC_CMD_RETR_ATTEST 0x1020 /* Bits in installed uv calls */ enum uv_cmds_inst { @@ -76,6 +77,7 @@ enum uv_cmds_inst { BIT_UVC_CMD_UNSHARE_ALL = 20, BIT_UVC_CMD_PIN_PAGE_SHARED = 21, BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22, + BIT_UVC_CMD_RETR_ATTEST = 28, }; enum uv_feat_ind { @@ -218,6 +220,25 @@ struct uv_cb_share { u64 reserved28; } __packed __aligned(8); +/* Retrieve Attestation Measurement */ +struct uv_cb_attest { + struct uv_cb_header header; /* 0x0000 */ + u64 reserved08[2]; /* 0x0008 */ + u64 arcb_addr; /* 0x0018 */ + u64 cont_token; /* 0x0020 */ + u8 reserved28[6]; /* 0x0028 */ + u16 user_data_len; /* 0x002e */ + u8 user_data[256]; /* 0x0030 */ + u32 reserved130[3]; /* 0x0130 */ + u32 meas_len; /* 0x013c */ + u64 meas_addr; /* 0x0140 */ + u8 config_uid[16]; /* 0x0148 */ + u32 reserved158; /* 0x0158 */ + u32 add_data_len; /* 0x015c */ + u64 add_data_addr; /* 0x0160 */ + u64 reserved168[4]; /* 0x0168 */ +} __packed __aligned(8); + static inline int __uv_call(unsigned long r1, unsigned long r2) { int cc; diff --git a/arch/s390/include/uapi/asm/uvdevice.h b/arch/s390/include/uapi/asm/uvdevice.h index f2e4984a6e2e..7359f77583e0 100644 --- a/arch/s390/include/uapi/asm/uvdevice.h +++ b/arch/s390/include/uapi/asm/uvdevice.h @@ -17,11 +17,30 @@ struct uvio_ioctl_cb { __u8 reserved14[0x40 - 0x14]; /* must be zero */ }; +#define UVIO_ATT_USER_DATA_LEN 0x100 +#define UVIO_ATT_UID_LEN 0x10 +struct uvio_attest { + __u64 arcb_addr; /* 0x0000 */ + __u64 meas_addr; /* 0x0008 */ + __u64 add_data_addr; /* 0x0010 */ + __u8 user_data[UVIO_ATT_USER_DATA_LEN]; /* 0x0018 */ + __u8 config_uid[UVIO_ATT_UID_LEN]; /* 0x0118 */ + __u32 arcb_len; /* 0x0128 */ + __u32 meas_len; /* 0x012c */ + __u32 add_data_len; /* 0x0130 */ + __u16 user_data_len; /* 0x0134 */ + __u16 reserved136; /* 0x0136 */ +}; + #define UVIO_QUI_MAX_LEN 0x8000 +#define UVIO_ATT_ARCB_MAX_LEN 0x100000 +#define UVIO_ATT_MEASUREMENT_MAX_LEN 0x8000 +#define UVIO_ATT_ADDITIONAL_MAX_LEN 0x8000 #define UVIO_DEVICE_NAME "uv" #define UVIO_TYPE_UVC 'u' #define UVIO_IOCTL_QUI _IOWR(UVIO_TYPE_UVC, 0x01, struct uvio_ioctl_cb) +#define UVIO_IOCTL_ATT _IOWR(UVIO_TYPE_UVC, 0x02, struct uvio_ioctl_cb) #endif /* __S390X_ASM_UVDEVICE_H */ diff --git a/drivers/s390/char/uvdevice.c b/drivers/s390/char/uvdevice.c index e8efcbf0e7ab..3a40a1ee150a 100644 --- a/drivers/s390/char/uvdevice.c +++ b/drivers/s390/char/uvdevice.c @@ -65,6 +65,163 @@ static int uvio_qui(struct uvio_ioctl_cb *uv_ioctl) return ret; } +/* Create Attestation Measurement functions */ + +static int uvio_build_uvcb_attest(struct uv_cb_attest *uvcb_attest, u8 *arcb, + u8 *meas, u8 *add_data, struct uvio_attest *uvio_attest) +{ + void __user *user_buf_arcb = (void __user *)uvio_attest->arcb_addr; + + if (copy_from_user(arcb, user_buf_arcb, uvio_attest->arcb_len)) + return -EFAULT; + + uvcb_attest->header.len = sizeof(struct uv_cb_attest); + uvcb_attest->header.cmd = UVC_CMD_RETR_ATTEST; + uvcb_attest->arcb_addr = (u64)arcb; + uvcb_attest->cont_token = 0; + uvcb_attest->user_data_len = uvio_attest->user_data_len; + memcpy(uvcb_attest->user_data, uvio_attest->user_data, sizeof(uvcb_attest->user_data)); + uvcb_attest->meas_len = uvio_attest->meas_len; + uvcb_attest->meas_addr = (u64)meas; + uvcb_attest->add_data_len = uvio_attest->add_data_len; + uvcb_attest->add_data_addr = (u64)add_data; + + return 0; +} + +static int uvio_copy_attest_result_to_user(struct uv_cb_attest *uvcb_attest, + struct uvio_ioctl_cb *uv_ioctl, + u8 *measurement, u8 *add_data, + struct uvio_attest *uvio_attest) +{ + struct uvio_attest __user *user_uvio_attest = (void __user *)uv_ioctl->argument_addr; + void __user *user_buf_add = (void __user *)uvio_attest->add_data_addr; + void __user *user_buf_meas = (void __user *)uvio_attest->meas_addr; + void __user *user_buf_uid = &user_uvio_attest->config_uid; + + if (copy_to_user(user_buf_meas, measurement, uvio_attest->meas_len)) + return -EFAULT; + if (add_data && copy_to_user(user_buf_add, add_data, uvio_attest->add_data_len)) + return -EFAULT; + if (copy_to_user(user_buf_uid, uvcb_attest->config_uid, sizeof(uvcb_attest->config_uid))) + return -EFAULT; + return 0; +} + +static int get_uvio_attest(struct uvio_ioctl_cb *uv_ioctl, struct uvio_attest *uvio_attest) +{ + u8 __user *user_arg_buf = (u8 __user *)uv_ioctl->argument_addr; + + if (copy_from_user(uvio_attest, user_arg_buf, sizeof(*uvio_attest))) + return -EFAULT; + + if (uvio_attest->arcb_len > UVIO_ATT_ARCB_MAX_LEN) + return -EINVAL; + if (uvio_attest->arcb_len == 0) + return -EINVAL; + if (uvio_attest->meas_len > UVIO_ATT_MEASUREMENT_MAX_LEN) + return -EINVAL; + if (uvio_attest->meas_len == 0) + return -EINVAL; + if (uvio_attest->add_data_len > UVIO_ATT_ADDITIONAL_MAX_LEN) + return -EINVAL; + if (uvio_attest->reserved136) + return -EINVAL; + return 0; +} + +/** + * uvio_attestation() - Perform a Retrieve Attestation Measurement UVC. + * + * uv_ioctl: ioctl control block + * + * uvio_attestation() does a Retrieve Attestation Measurement Ultravisor Call. + * It verifies that the given userspace addresses are valid and request sizes + * are sane. Every other check is made by the Ultravisor and won't result in a + * negative return value. It copies the input to kernelspace, builds the + * request, sends the UV-call, and copies the result to userspace. + * + * The Attestation Request has two input and two outputs. + * ARCB and user data are inputs for the UV generated by userspace. + * Measurement and additional data are outputs for userspace generated by UV. + * + * The Attestation request control block (ARCB) is a cryptographically verified + * and secured request to UV and user data is some plaintext data which is + * going to be included in the attestation measurement calculation. + * + * Measurement is a cryptographic measurement of the callers properties, + * optional data configured by the ARCB and the user data. If specified by the + * ARCB, UV will add some additional data to the measurement calculation. + * This additional data is then returned as well. + * + * If the Retrieve Attestation Measurement UV facility is not present, + * UV will return invalid command rc. This won't be fenced in the driver + * and does not result in a negative return value. + * + * Context: might sleep + * + * Return: 0 on success or a negative error code on error. + */ +static int uvio_attestation(struct uvio_ioctl_cb *uv_ioctl) +{ + struct uv_cb_attest *uvcb_attest = NULL; + struct uvio_attest *uvio_attest = NULL; + u8 *measurement = NULL; + u8 *add_data = NULL; + u8 *arcb = NULL; + int ret; + + ret = -EINVAL; + if (uv_ioctl->argument_len != sizeof(*uvio_attest)) + goto out; + + ret = -ENOMEM; + uvio_attest = kzalloc(sizeof(*uvio_attest), GFP_KERNEL); + if (!uvio_attest) + goto out; + + ret = get_uvio_attest(uv_ioctl, uvio_attest); + if (ret) + goto out; + + ret = -ENOMEM; + arcb = kvzalloc(uvio_attest->arcb_len, GFP_KERNEL); + measurement = kvzalloc(uvio_attest->meas_len, GFP_KERNEL); + if (!arcb || !measurement) + goto out; + + if (uvio_attest->add_data_len) { + ret = -ENOMEM; + add_data = kvzalloc(uvio_attest->add_data_len, GFP_KERNEL); + if (!add_data) + goto out; + } + + ret = -ENOMEM; + uvcb_attest = kzalloc(sizeof(*uvcb_attest), GFP_KERNEL); + if (!uvcb_attest) + goto out; + + ret = uvio_build_uvcb_attest(uvcb_attest, arcb, measurement, add_data, uvio_attest); + if (ret) + goto out; + + uv_call_sched(0, (u64)uvcb_attest); + + uv_ioctl->uv_rc = uvcb_attest->header.rc; + uv_ioctl->uv_rrc = uvcb_attest->header.rrc; + + ret = uvio_copy_attest_result_to_user(uvcb_attest, uv_ioctl, measurement, add_data, + uvio_attest); +out: + kvfree(arcb); + kvfree(measurement); + kvfree(add_data); + kfree(uvio_attest); + kfree(uvcb_attest); + return ret; +} + static int uvio_copy_and_check_ioctl(struct uvio_ioctl_cb *ioctl, void __user *argp) { u64 sum = 0; @@ -113,6 +270,12 @@ static long uvio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) goto out; ret = uvio_qui(uv_ioctl); break; + case UVIO_IOCTL_ATT: + ret = uvio_copy_and_check_ioctl(uv_ioctl, argp); + if (ret) + goto out; + ret = uvio_attestation(uv_ioctl); + break; default: ret = -EINVAL; break; From patchwork Thu Feb 17 11:37:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steffen Eiden X-Patchwork-Id: 12749859 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F65DC433F5 for ; Thu, 17 Feb 2022 11:37:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239967AbiBQLhu (ORCPT ); Thu, 17 Feb 2022 06:37:50 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:46144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239950AbiBQLhq (ORCPT ); Thu, 17 Feb 2022 06:37:46 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E438224BF9; Thu, 17 Feb 2022 03:37:31 -0800 (PST) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 21H9GeWp008269; Thu, 17 Feb 2022 11:37:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=KvMzaLR1TufPnC4DHfiAoXqnp0EmCnRVVVq8LdIL4Hk=; b=R2Rn8CiUx6UZYbqnmaJWg09XDwrx/tmNIDEnKW6AUlAcqi79tgpjb3dNWgGmIHwCBID2 IMtzBr+QYR0K80feAh3WhcYKxxRVnyUlh4VhlJ//oTK2yF6udnrHB/aBHPFQ2qguIaxZ Ko5Qj0b3x/dQcy0MIqdhnwSfejsMkFnY30Tq3E80SPAkQLdEUK6X9EiWD2PTcdpT/+Av FRNz5d/mKSXTPiwDQpi2MVdhR1Xzykqc2iOoqoNj8DX+ZR8OxmgYf4hRjYBLeDU6kJWp CKLJWrQJMgX0OGh4AY0Z0drmtke2OX/1XSnEYfHyF701R9hr3mo3Zsl1RUFdV/C+HLLg WA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e9kkdb4ws-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 11:37:30 +0000 Received: from m0098409.ppops.net (m0098409.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 21HAlB3M031368; Thu, 17 Feb 2022 11:37:29 GMT Received: from ppma05fra.de.ibm.com (6c.4a.5195.ip4.static.sl-reverse.com [149.81.74.108]) by mx0a-001b2d01.pphosted.com with ESMTP id 3e9kkdb4vm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 11:37:29 +0000 Received: from pps.filterd (ppma05fra.de.ibm.com [127.0.0.1]) by ppma05fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 21HBZxiM022810; Thu, 17 Feb 2022 11:37:27 GMT Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by ppma05fra.de.ibm.com with ESMTP id 3e64ha77jj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 17 Feb 2022 11:37:27 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 21HBbNbG41091558 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 17 Feb 2022 11:37:23 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4DD5252067; Thu, 17 Feb 2022 11:37:23 +0000 (GMT) Received: from localhost.localdomain (unknown [9.114.12.92]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 2367F52050; Thu, 17 Feb 2022 11:37:22 +0000 (GMT) From: Steffen Eiden To: Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Alexander Gordeev , Janosch Frank , David Hildenbrand , Claudio Imbrenda , Shuah Khan , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 3/3] selftests: drivers/s390x: Add uvdevice tests Date: Thu, 17 Feb 2022 06:37:17 -0500 Message-Id: <20220217113717.46624-4-seiden@linux.ibm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220217113717.46624-1-seiden@linux.ibm.com> References: <20220217113717.46624-1-seiden@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: UR1aZOq-ghxfbYBPela9j4De2WKHiqxC X-Proofpoint-ORIG-GUID: _omyjQQomlYEgRqTg0ZrQHmgKK4yDz9d X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-02-17_04,2022-02-17_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 malwarescore=0 phishscore=0 mlxscore=0 clxscore=1015 spamscore=0 impostorscore=0 mlxlogscore=999 suspectscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2201110000 definitions=main-2202170051 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Adds some selftests to test ioctl error paths of the uv-uapi. Signed-off-by: Steffen Eiden --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/drivers/.gitignore | 1 + .../selftests/drivers/s390x/uvdevice/Makefile | 22 ++ .../selftests/drivers/s390x/uvdevice/config | 1 + .../drivers/s390x/uvdevice/test_uvdevice.c | 280 ++++++++++++++++++ 6 files changed, 306 insertions(+) create mode 100644 tools/testing/selftests/drivers/s390x/uvdevice/Makefile create mode 100644 tools/testing/selftests/drivers/s390x/uvdevice/config create mode 100644 tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c diff --git a/MAINTAINERS b/MAINTAINERS index c7d8d0fe48cf..c6a0311c3fa8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10462,6 +10462,7 @@ F: arch/s390/kernel/uv.c F: arch/s390/kvm/ F: arch/s390/mm/gmap.c F: drivers/s390/char/uvdevice.c +F: tools/testing/selftests/drivers/s390x/uvdevice/ F: tools/testing/selftests/kvm/*/s390x/ F: tools/testing/selftests/kvm/s390x/ diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index c852eb40c4f7..3b8abaee9271 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -9,6 +9,7 @@ TARGETS += core TARGETS += cpufreq TARGETS += cpu-hotplug TARGETS += drivers/dma-buf +TARGETS += drivers/s390x/uvdevice TARGETS += efivarfs TARGETS += exec TARGETS += filesystems diff --git a/tools/testing/selftests/drivers/.gitignore b/tools/testing/selftests/drivers/.gitignore index ca74f2e1c719..09e23b5afa96 100644 --- a/tools/testing/selftests/drivers/.gitignore +++ b/tools/testing/selftests/drivers/.gitignore @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only /dma-buf/udmabuf +/s390x/uvdevice/test_uvdevice diff --git a/tools/testing/selftests/drivers/s390x/uvdevice/Makefile b/tools/testing/selftests/drivers/s390x/uvdevice/Makefile new file mode 100644 index 000000000000..5e701d2708d4 --- /dev/null +++ b/tools/testing/selftests/drivers/s390x/uvdevice/Makefile @@ -0,0 +1,22 @@ +include ../../../../../build/Build.include + +UNAME_M := $(shell uname -m) + +ifneq ($(UNAME_M),s390x) +nothing: +.PHONY: all clean run_tests install +.SILENT: +else + +TEST_GEN_PROGS := test_uvdevice + +top_srcdir ?= ../../../../../.. +KSFT_KHDR_INSTALL := 1 +khdr_dir = $(top_srcdir)/usr/include +LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/$(ARCH)/include + +CFLAGS += -Wall -Werror -static -I$(khdr_dir) -I$(LINUX_TOOL_ARCH_INCLUDE) + +include ../../../lib.mk + +endif diff --git a/tools/testing/selftests/drivers/s390x/uvdevice/config b/tools/testing/selftests/drivers/s390x/uvdevice/config new file mode 100644 index 000000000000..f28a04b99eff --- /dev/null +++ b/tools/testing/selftests/drivers/s390x/uvdevice/config @@ -0,0 +1 @@ +CONFIG_S390_UV_UAPI=y diff --git a/tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c b/tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c new file mode 100644 index 000000000000..f23663bcab03 --- /dev/null +++ b/tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c @@ -0,0 +1,280 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * selftest for the Ultravisor UAPI device + * + * Copyright IBM Corp. 2022 + * Author(s): Steffen Eiden + */ + +#include +#include +#include +#include +#include + +#include + +#include "../../../kselftest_harness.h" + +#define BUFFER_SIZE 0x200 +FIXTURE(uvio_fixture) { + int uv_fd; + struct uvio_ioctl_cb uvio_ioctl; + uint8_t buffer[BUFFER_SIZE]; + __u64 fault_page; +}; + +FIXTURE_VARIANT(uvio_fixture) { + unsigned long ioctl_cmd; + uint32_t arg_size; +}; + +FIXTURE_VARIANT_ADD(uvio_fixture, qui) { + .ioctl_cmd = UVIO_IOCTL_QUI, + .arg_size = BUFFER_SIZE, +}; + +FIXTURE_VARIANT_ADD(uvio_fixture, att) { + .ioctl_cmd = UVIO_IOCTL_ATT, + .arg_size = sizeof(struct uvio_attest), +}; + +FIXTURE_SETUP(uvio_fixture) +{ + self->uv_fd = open("/dev/uv", O_RDWR); + + self->uvio_ioctl.argument_addr = (__u64)self->buffer; + self->uvio_ioctl.argument_len = variant->arg_size; + self->fault_page = + (__u64)mmap(NULL, (size_t)getpagesize(), PROT_NONE, MAP_ANONYMOUS, -1, 0); +} + +FIXTURE_TEARDOWN(uvio_fixture) +{ + if (self->uv_fd) + close(self->uv_fd); + munmap((void *)self->fault_page, (size_t)getpagesize()); +} + +TEST_F(uvio_fixture, fault_ioctl_arg) +{ + int rc, errno_cache; + + rc = ioctl(self->uv_fd, variant->ioctl_cmd, NULL); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EFAULT); + + rc = ioctl(self->uv_fd, variant->ioctl_cmd, self->fault_page); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EFAULT); +} + +TEST_F(uvio_fixture, fault_uvio_arg) +{ + int rc, errno_cache; + + self->uvio_ioctl.argument_addr = 0; + rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EFAULT); + + self->uvio_ioctl.argument_addr = self->fault_page; + rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EFAULT); +} + +/* + * Test to verify that IOCTLs with invalid values in the ioctl_control block + * are rejected. + */ +TEST_F(uvio_fixture, inval_ioctl_cb) +{ + int rc, errno_cache; + + self->uvio_ioctl.argument_len = 0; + rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + + self->uvio_ioctl.argument_len = (uint32_t)-1; + rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + self->uvio_ioctl.argument_len = variant->arg_size; + + self->uvio_ioctl.flags = (uint32_t)-1; + rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + self->uvio_ioctl.flags = 0; + + memset(self->uvio_ioctl.reserved14, 0xff, sizeof(self->uvio_ioctl.reserved14)); + rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + + memset(&self->uvio_ioctl, 0x11, sizeof(self->uvio_ioctl)); + rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl); + ASSERT_EQ(rc, -1); +} + +TEST_F(uvio_fixture, inval_ioctl_cmd) +{ + int rc, errno_cache; + uint8_t nr = _IOC_NR(variant->ioctl_cmd); + unsigned long cmds[] = { + _IOWR('a', nr, struct uvio_ioctl_cb), + _IOWR(UVIO_TYPE_UVC, nr, int), + _IO(UVIO_TYPE_UVC, nr), + _IOR(UVIO_TYPE_UVC, nr, struct uvio_ioctl_cb), + _IOW(UVIO_TYPE_UVC, nr, struct uvio_ioctl_cb), + }; + + for (size_t i = 0; i < ARRAY_SIZE(cmds); i++) { + rc = ioctl(self->uv_fd, cmds[i], &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + } +} + +struct test_attest_buffer { + uint8_t arcb[0x180]; + uint8_t meas[64]; + uint8_t add[32]; +}; + +FIXTURE(attest_fixture) { + int uv_fd; + struct uvio_ioctl_cb uvio_ioctl; + struct uvio_attest uvio_attest; + struct test_attest_buffer attest_buffer; + __u64 fault_page; +}; + +FIXTURE_SETUP(attest_fixture) +{ + self->uv_fd = open("/dev/uv", O_RDWR); + + self->uvio_ioctl.argument_addr = (__u64)&self->uvio_attest; + self->uvio_ioctl.argument_len = sizeof(self->uvio_attest); + + self->uvio_attest.arcb_addr = (__u64)&self->attest_buffer.arcb; + self->uvio_attest.arcb_len = sizeof(self->attest_buffer.arcb); + + self->uvio_attest.meas_addr = (__u64)&self->attest_buffer.meas; + self->uvio_attest.meas_len = sizeof(self->attest_buffer.meas); + + self->uvio_attest.add_data_addr = (__u64)&self->attest_buffer.add; + self->uvio_attest.add_data_len = sizeof(self->attest_buffer.add); + self->fault_page = + (__u64)mmap(NULL, (size_t)getpagesize(), PROT_NONE, MAP_ANONYMOUS, -1, 0); +} + +FIXTURE_TEARDOWN(attest_fixture) +{ + if (self->uv_fd) + close(self->uv_fd); + munmap((void *)self->fault_page, (size_t)getpagesize()); +} + +static void att_inval_sizes_test(uint32_t *size, uint32_t max_size, bool test_zero, + struct __test_metadata *_metadata, + FIXTURE_DATA(attest_fixture) *self) +{ + int rc, errno_cache; + uint32_t tmp = *size; + + if (test_zero) { + *size = 0; + rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + } + *size = max_size + 1; + rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + *size = tmp; +} + +/* + * Test to verify that attestation IOCTLs with invalid values in the UVIO + * attestation control block are rejected. + */ +TEST_F(attest_fixture, att_inval_request) +{ + int rc, errno_cache; + + att_inval_sizes_test(&self->uvio_attest.add_data_len, UVIO_ATT_ADDITIONAL_MAX_LEN, + false, _metadata, self); + att_inval_sizes_test(&self->uvio_attest.meas_len, UVIO_ATT_MEASUREMENT_MAX_LEN, + true, _metadata, self); + att_inval_sizes_test(&self->uvio_attest.arcb_len, UVIO_ATT_ARCB_MAX_LEN, + true, _metadata, self); + + self->uvio_attest.reserved136 = (uint16_t)-1; + rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EINVAL); + + memset(&self->uvio_attest, 0x11, sizeof(self->uvio_attest)); + rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl); + ASSERT_EQ(rc, -1); +} + +static void att_inval_addr_test(__u64 *addr, struct __test_metadata *_metadata, + FIXTURE_DATA(attest_fixture) *self) +{ + int rc, errno_cache; + __u64 tmp = *addr; + + *addr = 0; + rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EFAULT); + *addr = self->fault_page; + rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl); + errno_cache = errno; + ASSERT_EQ(rc, -1); + ASSERT_EQ(errno_cache, EFAULT); + *addr = tmp; +} + +TEST_F(attest_fixture, att_inval_addr) +{ + att_inval_addr_test(&self->uvio_attest.arcb_addr, _metadata, self); + att_inval_addr_test(&self->uvio_attest.add_data_addr, _metadata, self); + att_inval_addr_test(&self->uvio_attest.meas_addr, _metadata, self); +} + +static void __attribute__((constructor)) __constructor_order_last(void) +{ + if (!__constructor_order) + __constructor_order = _CONSTRUCTOR_ORDER_BACKWARD; +} + +int main(int argc, char **argv) +{ + int fd = open("/dev/uv", O_RDWR); + + if (fd < 0) { + ksft_exit_skip("No uv-device.\n"); + ksft_exit(KSFT_SKIP); + } + close(fd); + return test_harness_run(argc, argv); +}