KVM: s390: Export two functions

Export __make_folio_secure() and s390_wiggle_split_folio(), as they will
be needed to be used by KVM.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

diff --git a/arch/s390/include/asm/uv.h b/arch/s390/include/asm/uv.h
index 8018549a1ad2315128e94e3f93feaa1c504deb4f..0744874ca6df0ed6667ab0b44b76d1e0193d44f1 100644 (file)
--- a/arch/s390/include/asm/uv.h
+++ b/arch/s390/include/asm/uv.h
@@ -632,6 +632,8 @@ int uv_destroy_folio(struct folio *folio);
 int uv_destroy_pte(pte_t pte);
 int uv_convert_from_secure_pte(pte_t pte);
 int make_hva_secure(struct mm_struct *mm, unsigned long hva, struct uv_cb_header *uvcb);
+int s390_wiggle_split_folio(struct mm_struct *mm, struct folio *folio);
+int __make_folio_secure(struct folio *folio, struct uv_cb_header *uvcb);
 int uv_convert_from_secure(unsigned long paddr);
 int uv_convert_from_secure_folio(struct folio *folio);
 

diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c
index ca0849008c0da4b28315cd22386f5015ee1598d4..cb4e8089fbca0f8939559706566ad9f0a4d5c734 100644 (file)
--- a/arch/s390/kernel/uv.c
+++ b/arch/s390/kernel/uv.c
@@ -281,7 +281,7 @@ static int expected_folio_refs(struct folio *folio)
  *          (it's the same logic as split_folio()), and the folio must be
  *          locked.
  */
-static int __make_folio_secure(struct folio *folio, struct uv_cb_header *uvcb)
+int __make_folio_secure(struct folio *folio, struct uv_cb_header *uvcb)
 {
        int expected, cc = 0;
 
@@ -311,6 +311,7 @@ static int __make_folio_secure(struct folio *folio, struct uv_cb_header *uvcb)
                return -EAGAIN;
        return uvcb->rc == 0x10a ? -ENXIO : -EINVAL;
 }
+EXPORT_SYMBOL(__make_folio_secure);
 
 static int make_folio_secure(struct mm_struct *mm, struct folio *folio, struct uv_cb_header *uvcb)
 {
@@ -339,7 +340,7 @@ static int make_folio_secure(struct mm_struct *mm, struct folio *folio, struct u
  *                but another attempt can be made;
  *        -EINVAL in case of other folio splitting errors. See split_folio().
  */
-static int s390_wiggle_split_folio(struct mm_struct *mm, struct folio *folio)
+int s390_wiggle_split_folio(struct mm_struct *mm, struct folio *folio)
 {
        int rc, tried_splits;
 
@@ -411,6 +412,7 @@ static int s390_wiggle_split_folio(struct mm_struct *mm, struct folio *folio)
        }
        return -EAGAIN;
 }
+EXPORT_SYMBOL_GPL(s390_wiggle_split_folio);
 
 int make_hva_secure(struct mm_struct *mm, unsigned long hva, struct uv_cb_header *uvcb)
 {