Commit ac640db3 authored by Janosch Frank's avatar Janosch Frank Committed by Christian Borntraeger
Browse files

s390/uv: Add SE hdr query information 



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

Signed-off-by: default avatarJanosch Frank <frankja@linux.ibm.com>
Reviewed-by: default avatarClaudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: default avatarSteffen 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: default avatarChristian Borntraeger <borntraeger@linux.ibm.com>
parent 85165781

arch/s390/boot/uv.c

+2 −0
Original line number Diff line number Diff line
@@ -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

arch/s390/include/asm/uv.h

+6 −1
Original line number Diff line number Diff line
@@ -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;

arch/s390/kernel/uv.c

+20 −0
Original line number Diff line number Diff line
@@ -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,

};