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s390/uv: Update query for secret-UVCs

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Update the query struct such that secret-UVC related
information can be parsed.
Add sysfs files for these new values.

'supp_add_secret_req_ver' notes the supported versions for the
Add Secret UVC. Bit 0 indicates that version 0x100 is supported,
bit 1 indicates 0x200, and so on.

'supp_add_secret_pcf' notes the supported plaintext flags for
the Add Secret UVC.

'supp_secret_types' notes the supported types of secrets.
Bit 0 indicates secret type 1, bit 1 indicates type 2, and so on.

'max_secrets' notes the maximum amount of secrets the secret store can
store per pv guest.

Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20230615100533.3996107-8-seiden@linux.ibm.com
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20230615100533.3996107-8-seiden@linux.ibm.com>
This commit is contained in:
Steffen Eiden 2023-06-15 12:05:33 +02:00 committed by Janosch Frank
parent 78d3326e72
commit db54dfc9f7
3 changed files with 55 additions and 2 deletions
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4
arch/s390/boot/uv.c
View file

@ -47,6 +47,10 @@ void uv_query_info(void)
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;
uv_info.supp_add_secret_req_ver = uvcb.supp_add_secret_req_ver;
uv_info.supp_add_secret_pcf = uvcb.supp_add_secret_pcf;
uv_info.supp_secret_types = uvcb.supp_secret_types;
uv_info.max_secrets = uvcb.max_secrets;
}
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST

13
arch/s390/include/asm/uv.h
View file

@ -123,7 +123,7 @@ struct uv_cb_qui {
u32 reserved70[3]; /* 0x0070 */
u32 max_num_sec_conf; /* 0x007c */
u64 max_guest_stor_addr; /* 0x0080 */
u8 reserved88[158 - 136]; /* 0x0088 */
u8 reserved88[0x9e - 0x88]; /* 0x0088 */
u16 max_guest_cpu_id; /* 0x009e */
u64 uv_feature_indications; /* 0x00a0 */
u64 reserveda8; /* 0x00a8 */
@ -135,7 +135,12 @@ struct uv_cb_qui {
u64 reservedd8; /* 0x00d8 */
u64 supp_att_req_hdr_ver; /* 0x00e0 */
u64 supp_att_pflags; /* 0x00e8 */
u8 reservedf0[256 - 240]; /* 0x00f0 */
u64 reservedf0; /* 0x00f0 */
u64 supp_add_secret_req_ver; /* 0x00f8 */
u64 supp_add_secret_pcf; /* 0x0100 */
u64 supp_secret_types; /* 0x0180 */
u16 max_secrets; /* 0x0110 */
u8 reserved112[0x120 - 0x112]; /* 0x0112 */
} __packed __aligned(8);
/* Initialize Ultravisor */
@ -384,6 +389,10 @@ struct uv_info {
unsigned long conf_dump_finalize_len;
unsigned long supp_att_req_hdr_ver;
unsigned long supp_att_pflags;
unsigned long supp_add_secret_req_ver;
unsigned long supp_add_secret_pcf;
unsigned long supp_secret_types;
unsigned short max_secrets;
};
extern struct uv_info uv_info;

40
arch/s390/kernel/uv.c
View file

@ -579,6 +579,42 @@ static ssize_t uv_query_supp_att_pflags(struct kobject *kobj,
static struct kobj_attribute uv_query_supp_att_pflags_attr =
__ATTR(supp_att_pflags, 0444, uv_query_supp_att_pflags, NULL);
static ssize_t uv_query_supp_add_secret_req_ver(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%lx\n", uv_info.supp_add_secret_req_ver);
}
static struct kobj_attribute uv_query_supp_add_secret_req_ver_attr =
__ATTR(supp_add_secret_req_ver, 0444, uv_query_supp_add_secret_req_ver, NULL);
static ssize_t uv_query_supp_add_secret_pcf(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%lx\n", uv_info.supp_add_secret_pcf);
}
static struct kobj_attribute uv_query_supp_add_secret_pcf_attr =
__ATTR(supp_add_secret_pcf, 0444, uv_query_supp_add_secret_pcf, NULL);
static ssize_t uv_query_supp_secret_types(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%lx\n", uv_info.supp_secret_types);
}
static struct kobj_attribute uv_query_supp_secret_types_attr =
__ATTR(supp_secret_types, 0444, uv_query_supp_secret_types, NULL);
static ssize_t uv_query_max_secrets(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%d\n", uv_info.max_secrets);
}
static struct kobj_attribute uv_query_max_secrets_attr =
__ATTR(max_secrets, 0444, uv_query_max_secrets, NULL);
static struct attribute *uv_query_attrs[] = {
&uv_query_facilities_attr.attr,
&uv_query_feature_indications_attr.attr,
@ -592,6 +628,10 @@ static struct attribute *uv_query_attrs[] = {
&uv_query_dump_cpu_len_attr.attr,
&uv_query_supp_att_req_hdr_ver_attr.attr,
&uv_query_supp_att_pflags_attr.attr,
&uv_query_supp_add_secret_req_ver_attr.attr,
&uv_query_supp_add_secret_pcf_attr.attr,
&uv_query_supp_secret_types_attr.attr,
&uv_query_max_secrets_attr.attr,
NULL,
};