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(unknown [9.152.108.100]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 18 May 2022 09:51:13 +0000 (GMT) From: Steffen Eiden To: Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Nico Boehr , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] s390: Add attestation query information Date: Wed, 18 May 2022 09:51:13 +0000 Message-Id: <20220518095113.982955-1-seiden@linux.ibm.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: JJrfQO2OueKxAL_q7mIJKG5-1TzF9r_2 X-Proofpoint-ORIG-GUID: JJrfQO2OueKxAL_q7mIJKG5-1TzF9r_2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-18_03,2022-05-17_02,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 spamscore=0 phishscore=0 impostorscore=0 mlxscore=0 bulkscore=0 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2205180052 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org We have information about the supported attestation header version and paf (= plaintext attestation flag) bits. Let's expose it via the sysfs files. Signed-off-by: Steffen Eiden --- arch/s390/boot/uv.c | 2 ++ arch/s390/include/asm/uv.h | 7 ++++++- arch/s390/kernel/uv.c | 20 ++++++++++++++++++++ 3 files changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c index e6be155ab2e5..5e17c657e3d6 100644 --- a/arch/s390/boot/uv.c +++ b/arch/s390/boot/uv.c @@ -41,6 +41,8 @@ void uv_query_info(void) uv_info.max_num_sec_conf = uvcb.max_num_sec_conf; uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id; uv_info.uv_feature_indications = uvcb.uv_feature_indications; + uv_info.supp_att_req_hdr_ver = uvcb.supp_att_req_hdr_ver; + uv_info.supp_att_pflags = uvcb.supp_att_pflags; } #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h index cfea7b77a5b8..99f459c0eacc 100644 --- a/arch/s390/include/asm/uv.h +++ b/arch/s390/include/asm/uv.h @@ -110,7 +110,10 @@ struct uv_cb_qui { u8 reserved88[158 - 136]; /* 0x0088 */ u16 max_guest_cpu_id; /* 0x009e */ u64 uv_feature_indications; /* 0x00a0 */ - u8 reserveda8[200 - 168]; /* 0x00a8 */ + u8 reserveda8[224 - 168]; /* 0x00a8 */ + u64 supp_att_req_hdr_ver; /* 0x00e0 */ + u64 supp_att_pflags; /* 0x00e8 */ + u8 reservedf0[256 - 240]; /* 0x00f0 */ } __packed __aligned(8); /* Initialize Ultravisor */ @@ -307,6 +310,8 @@ struct uv_info { unsigned int max_num_sec_conf; unsigned short max_guest_cpu_id; unsigned long uv_feature_indications; + unsigned long supp_att_req_hdr_ver; + unsigned long supp_att_pflags; }; extern struct uv_info uv_info; diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index a5425075dd25..095afd375ad1 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -431,12 +431,32 @@ static ssize_t uv_query_max_guest_addr(struct kobject *kobj, static struct kobj_attribute uv_query_max_guest_addr_attr = __ATTR(max_address, 0444, uv_query_max_guest_addr, NULL); +static ssize_t uv_query_supp_att_req_hdr_ver(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return scnprintf(page, PAGE_SIZE, "%lx\n", uv_info.supp_att_req_hdr_ver); +} + +static struct kobj_attribute uv_query_supp_att_req_hdr_ver_attr = + __ATTR(supp_att_req_hdr_ver, 0444, uv_query_supp_att_req_hdr_ver, NULL); + +static ssize_t uv_query_supp_att_pflags(struct kobject *kobj, + struct kobj_attribute *attr, char *page) +{ + return scnprintf(page, PAGE_SIZE, "%lx\n", uv_info.supp_att_pflags); +} + +static struct kobj_attribute uv_query_supp_att_pflags_attr = + __ATTR(supp_att_pflags, 0444, uv_query_supp_att_pflags, NULL); + static struct attribute *uv_query_attrs[] = { &uv_query_facilities_attr.attr, &uv_query_feature_indications_attr.attr, &uv_query_max_guest_cpus_attr.attr, &uv_query_max_guest_vms_attr.attr, &uv_query_max_guest_addr_attr.attr, + &uv_query_supp_att_req_hdr_ver_attr.attr, + &uv_query_supp_att_pflags_attr.attr, NULL, }; -- 2.30.2