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s390/uv: Add SE hdr query information

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We have information about the supported se header version and pcf bits
so let's expose it via the sysfs files.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Link: https://lore.kernel.org/r/20220517163629.3443-2-frankja@linux.ibm.com
Message-Id: <20220517163629.3443-2-frankja@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
This commit is contained in:
Janosch Frank 2022-05-17 16:36:19 +00:00 committed by Christian Borntraeger
parent 85165781c5
commit ac640db3a0
3 changed files with 28 additions and 1 deletions
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2
arch/s390/boot/uv.c
View File

@ -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_se_hdr_ver = uvcb.supp_se_hdr_versions;
uv_info.supp_se_hdr_pcf = uvcb.supp_se_hdr_pcf;
}
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST

7
arch/s390/include/asm/uv.h
View File

@ -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 */
u64 reserveda8; /* 0x00a8 */
u64 supp_se_hdr_versions; /* 0x00b0 */
u64 supp_se_hdr_pcf; /* 0x00b8 */
u64 reservedc0; /* 0x00c0 */
} __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_se_hdr_ver;
unsigned long supp_se_hdr_pcf;
};
extern struct uv_info uv_info;

20
arch/s390/kernel/uv.c
View File

@ -392,6 +392,24 @@ static ssize_t uv_query_facilities(struct kobject *kobj,
static struct kobj_attribute uv_query_facilities_attr =
__ATTR(facilities, 0444, uv_query_facilities, NULL);
static ssize_t uv_query_supp_se_hdr_ver(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%lx\n", uv_info.supp_se_hdr_ver);
}
static struct kobj_attribute uv_query_supp_se_hdr_ver_attr =
__ATTR(supp_se_hdr_ver, 0444, uv_query_supp_se_hdr_ver, NULL);
static ssize_t uv_query_supp_se_hdr_pcf(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%lx\n", uv_info.supp_se_hdr_pcf);
}
static struct kobj_attribute uv_query_supp_se_hdr_pcf_attr =
__ATTR(supp_se_hdr_pcf, 0444, uv_query_supp_se_hdr_pcf, NULL);
static ssize_t uv_query_feature_indications(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@ -437,6 +455,8 @@ static struct attribute *uv_query_attrs[] = {
&uv_query_max_guest_cpus_attr.attr,
&uv_query_max_guest_vms_attr.attr,
&uv_query_max_guest_addr_attr.attr,
&uv_query_supp_se_hdr_ver_attr.attr,
&uv_query_supp_se_hdr_pcf_attr.attr,
NULL,
};