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authorJanosch Frank <frankja@linux.ibm.com>2022-05-17 18:36:20 +0200
committerChristian Borntraeger <borntraeger@linux.ibm.com>2022-06-01 16:57:14 +0200
commit38c218259d4c4a8c232c2b16a5598568b814d2df (patch)
tree97c25cb058350a6ece22914ee04bea3a4993d7f2
parents390/uv: Add SE hdr query information (diff)
downloadlinux-38c218259d4c4a8c232c2b16a5598568b814d2df.tar.xz
linux-38c218259d4c4a8c232c2b16a5598568b814d2df.zip
s390/uv: Add dump fields to query
The new dump feature requires us to know how much memory is needed for the "dump storage state" and "dump finalize" ultravisor call. These values are reported via the UV query call. 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/20220517163629.3443-3-frankja@linux.ibm.com Message-Id: <20220517163629.3443-3-frankja@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
-rw-r--r--arch/s390/boot/uv.c2
-rw-r--r--arch/s390/include/asm/uv.h5
-rw-r--r--arch/s390/kernel/uv.c33
3 files changed, 40 insertions, 0 deletions
diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c
index b100b57cf15d..67c737c1e580 100644
--- a/arch/s390/boot/uv.c
+++ b/arch/s390/boot/uv.c
@@ -43,6 +43,8 @@ void uv_query_info(void)
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;
+ uv_info.conf_dump_storage_state_len = uvcb.conf_dump_storage_state_len;
+ uv_info.conf_dump_finalize_len = uvcb.conf_dump_finalize_len;
}
#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h
index 46498b8c587b..e8257a293dd1 100644
--- a/arch/s390/include/asm/uv.h
+++ b/arch/s390/include/asm/uv.h
@@ -114,6 +114,9 @@ struct uv_cb_qui {
u64 supp_se_hdr_versions; /* 0x00b0 */
u64 supp_se_hdr_pcf; /* 0x00b8 */
u64 reservedc0; /* 0x00c0 */
+ u64 conf_dump_storage_state_len; /* 0x00c8 */
+ u64 conf_dump_finalize_len; /* 0x00d0 */
+ u8 reservedd8[256 - 216]; /* 0x00d8 */
} __packed __aligned(8);
/* Initialize Ultravisor */
@@ -312,6 +315,8 @@ struct uv_info {
unsigned long uv_feature_indications;
unsigned long supp_se_hdr_ver;
unsigned long supp_se_hdr_pcf;
+ unsigned long conf_dump_storage_state_len;
+ unsigned long conf_dump_finalize_len;
};
extern struct uv_info uv_info;
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c
index 852840384e75..84fe33b6af4d 100644
--- a/arch/s390/kernel/uv.c
+++ b/arch/s390/kernel/uv.c
@@ -410,6 +410,36 @@ static ssize_t uv_query_supp_se_hdr_pcf(struct kobject *kobj,
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_dump_cpu_len(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "%lx\n",
+ uv_info.guest_cpu_stor_len);
+}
+
+static struct kobj_attribute uv_query_dump_cpu_len_attr =
+ __ATTR(uv_query_dump_cpu_len, 0444, uv_query_dump_cpu_len, NULL);
+
+static ssize_t uv_query_dump_storage_state_len(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "%lx\n",
+ uv_info.conf_dump_storage_state_len);
+}
+
+static struct kobj_attribute uv_query_dump_storage_state_len_attr =
+ __ATTR(dump_storage_state_len, 0444, uv_query_dump_storage_state_len, NULL);
+
+static ssize_t uv_query_dump_finalize_len(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "%lx\n",
+ uv_info.conf_dump_finalize_len);
+}
+
+static struct kobj_attribute uv_query_dump_finalize_len_attr =
+ __ATTR(dump_finalize_len, 0444, uv_query_dump_finalize_len, NULL);
+
static ssize_t uv_query_feature_indications(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@@ -457,6 +487,9 @@ static struct attribute *uv_query_attrs[] = {
&uv_query_max_guest_addr_attr.attr,
&uv_query_supp_se_hdr_ver_attr.attr,
&uv_query_supp_se_hdr_pcf_attr.attr,
+ &uv_query_dump_storage_state_len_attr.attr,
+ &uv_query_dump_finalize_len_attr.attr,
+ &uv_query_dump_cpu_len_attr.attr,
NULL,
};