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Commit f7777e00 authored by Ram Pai's avatar Ram Pai Committed by Michael Ellerman
Browse files

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



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

Signed-off-by: default avatarRam Pai <linuxram@us.ibm.com>
Signed-off-by: default avatarThiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190820021326.6884-6-bauerman@linux.ibm.com
parent 6a9c930b

arch/powerpc/include/asm/ultravisor-api.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */

arch/powerpc/include/asm/ultravisor.h

+10 −0
Original line number Diff line number Diff line
@@ -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 */