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powerpc/pseries/svm: Add helpers for UV_SHARE_PAGE and UV_UNSHARE_PAGE

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These functions are used when the guest wants to grant the hypervisor
access to certain pages.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190820021326.6884-6-bauerman@linux.ibm.com
This commit is contained in:
Ram Pai 2019-08-19 23:13:15 -03:00 committed by Michael Ellerman
parent 6a9c930bd7
commit f7777e008c
2 changed files with 12 additions and 0 deletions
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2
arch/powerpc/include/asm/ultravisor-api.h
View File

@ -26,5 +26,7 @@
#define UV_WRITE_PATE 0xF104
#define UV_RETURN 0xF11C
#define UV_ESM 0xF110
#define UV_SHARE_PAGE 0xF130
#define UV_UNSHARE_PAGE 0xF134
#endif /* _ASM_POWERPC_ULTRAVISOR_API_H */

10
arch/powerpc/include/asm/ultravisor.h
View File

@ -31,4 +31,14 @@ static inline int uv_register_pate(u64 lpid, u64 dw0, u64 dw1)
return ucall_norets(UV_WRITE_PATE, lpid, dw0, dw1);
}
static inline int uv_share_page(u64 pfn, u64 npages)
{
return ucall_norets(UV_SHARE_PAGE, pfn, npages);
}
static inline int uv_unshare_page(u64 pfn, u64 npages)
{
return ucall_norets(UV_UNSHARE_PAGE, pfn, npages);
}
#endif /* _ASM_POWERPC_ULTRAVISOR_H */