Commit 3ddee7e6 authored by Claudio Imbrenda's avatar Claudio Imbrenda
Browse files

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: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarClaudio Imbrenda <imbrenda@linux.ibm.com>
parent cf3ce3d6

arch/s390/include/asm/uv.h

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

arch/s390/kernel/uv.c

+4 −2
Original line number Diff line number Diff line
@@ -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)

{