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KVM: s390: Export two functions

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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>
This commit is contained in:
Claudio Imbrenda 2026-02-04 16:02:36 +01:00
parent cf3ce3d69d
commit 3ddee7e651
2 changed files with 6 additions and 2 deletions
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2
arch/s390/include/asm/uv.h
View File

@ -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);

6
arch/s390/kernel/uv.c
View File

@ -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)
{