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s390/uv: export uv_pin_shared for direct usage

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Export the uv_pin_shared function so that it can be called from other
modules that carry a GPL-compatible license.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Tested-by: Viktor Mihajlovski <mihajlov@linux.ibm.com>
Link: https://lore.kernel.org/r/20230815184333.6554-11-akrowiak@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Janosch Frank 2023-08-15 14:43:31 -04:00 • committed by Heiko Carstens
parent 7847a19b5b
commit cf3fa16a6f
2 changed files with 8 additions and 1 deletions
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6
arch/s390/include/asm/uv.h
View file

@ -463,6 +463,7 @@ static inline int is_prot_virt_host(void)
return prot_virt_host; return prot_virt_host;
} }
int uv_pin_shared(unsigned long paddr);
int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb); int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb);
int gmap_destroy_page(struct gmap *gmap, unsigned long gaddr); int gmap_destroy_page(struct gmap *gmap, unsigned long gaddr);
int uv_destroy_owned_page(unsigned long paddr); int uv_destroy_owned_page(unsigned long paddr);
@ -475,6 +476,11 @@ void setup_uv(void);
#define is_prot_virt_host() 0 #define is_prot_virt_host() 0
static inline void setup_uv(void) {} static inline void setup_uv(void) {}
static inline int uv_pin_shared(unsigned long paddr)
{
return 0;
}
static inline int uv_destroy_owned_page(unsigned long paddr) static inline int uv_destroy_owned_page(unsigned long paddr)
{ {
return 0; return 0;

3
arch/s390/kernel/uv.c
View file

@ -88,7 +88,7 @@ fail:
* Requests the Ultravisor to pin the page in the shared state. This will * Requests the Ultravisor to pin the page in the shared state. This will
* cause an intercept when the guest attempts to unshare the pinned page. * cause an intercept when the guest attempts to unshare the pinned page.
*/ */
static int uv_pin_shared(unsigned long paddr) int uv_pin_shared(unsigned long paddr)
{ {
struct uv_cb_cfs uvcb = { struct uv_cb_cfs uvcb = {
.header.cmd = UVC_CMD_PIN_PAGE_SHARED, .header.cmd = UVC_CMD_PIN_PAGE_SHARED,
@ -100,6 +100,7 @@ static int uv_pin_shared(unsigned long paddr)
return -EINVAL; return -EINVAL;
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(uv_pin_shared);
/* /*
* Requests the Ultravisor to destroy a guest page and make it * Requests the Ultravisor to destroy a guest page and make it