AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-04 02:06:43 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

hv: hyperv.h: Introduce some hvpfn helper functions

Browse Source 
When a guest communicate with the hypervisor, it must use HV_HYP_PAGE to
calculate PFN, so introduce a few hvpfn helper functions as the
counterpart of the page helper functions. This is the preparation for
supporting guest whose PAGE_SIZE is not 4k.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200916034817.30282-7-boqun.feng@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Boqun Feng 2020-09-16 11:48:12 +08:00 committed by Wei Liu
parent bca6b91dfd
commit 106dee0840
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/hyperv.h
View File

@ -1691,4 +1691,9 @@ static inline unsigned long virt_to_hvpfn(void *addr)
return paddr >> HV_HYP_PAGE_SHIFT; return paddr >> HV_HYP_PAGE_SHIFT;
} }
#define NR_HV_HYP_PAGES_IN_PAGE (PAGE_SIZE / HV_HYP_PAGE_SIZE)
#define offset_in_hvpage(ptr) ((unsigned long)(ptr) & ~HV_HYP_PAGE_MASK)
#define HVPFN_UP(x) (((x) + HV_HYP_PAGE_SIZE-1) >> HV_HYP_PAGE_SHIFT)
#define page_to_hvpfn(page) (page_to_pfn(page) * NR_HV_HYP_PAGES_IN_PAGE)
#endif /* _HYPERV_H */ #endif /* _HYPERV_H */