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| author |   Steffen Eiden <seiden@linux.ibm.com> | 2022-05-18 13:59:08 +0000 |
|---|---|---|
| committer |   Janosch Frank <frankja@linux.ibm.com> | 2022-07-11 11:29:51 +0200 |
| commit | 1b6abe95b522b313569469498c8c648a5ee535ba (patch) | |
| tree | a45c46d74168024142d61a9f312f490fac0e0c4d /arch/s390 | |
| parent | KVM: s390: drop unexpected word 'and' in the comments (diff) | |
| download | linux-dev-1b6abe95b522b313569469498c8c648a5ee535ba.tar.xz linux-dev-1b6abe95b522b313569469498c8c648a5ee535ba.zip | |
s390: Add attestation query information
We have information about the supported attestation header version
and plaintext attestation flag bits.
Let's expose it via the sysfs files.
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/lkml/20220601100245.3189993-1-seiden@linux.ibm.com/
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/boot/uv.c | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/uv.h | 7 | ||||
| -rw-r--r-- | arch/s390/kernel/uv.c | 20 |
3 files changed, 28 insertions, 1 deletions
diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c index 67c737c1e580..a5fa667160b2 100644 --- a/arch/s390/boot/uv.c +++ b/arch/s390/boot/uv.c @@ -45,6 +45,8 @@ void uv_query_info(void) uv_info.supp_se_hdr_pcf = uvcb.supp_se_hdr_pcf; uv_info.conf_dump_storage_state_len = uvcb.conf_dump_storage_state_len; uv_info.conf_dump_finalize_len = uvcb.conf_dump_finalize_len; + 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 3e597bb634bd..18fe04c8547e 100644 --- a/arch/s390/include/asm/uv.h +++ b/arch/s390/include/asm/uv.h @@ -124,7 +124,10 @@ struct uv_cb_qui { u64 reservedc0; /* 0x00c0 */ u64 conf_dump_storage_state_len; /* 0x00c8 */ u64 conf_dump_finalize_len; /* 0x00d0 */ - u8 reservedd8[256 - 216]; /* 0x00d8 */ + u64 reservedd8; /* 0x00d8 */ + u64 supp_att_req_hdr_ver; /* 0x00e0 */ + u64 supp_att_pflags; /* 0x00e8 */ + u8 reservedf0[256 - 240]; /* 0x00f0 */ } __packed __aligned(8); /* Initialize Ultravisor */ @@ -350,6 +353,8 @@ struct uv_info { unsigned long supp_se_hdr_pcf; unsigned long conf_dump_storage_state_len; unsigned long conf_dump_finalize_len; + 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 84fe33b6af4d..c13d5a7b71f0 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -479,6 +479,24 @@ 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, @@ -490,6 +508,8 @@ static struct attribute *uv_query_attrs[] = { &uv_query_dump_storage_state_len_attr.attr, &uv_query_dump_finalize_len_attr.attr, &uv_query_dump_cpu_len_attr.attr, + &uv_query_supp_att_req_hdr_ver_attr.attr, + &uv_query_supp_att_pflags_attr.attr, NULL, }; |