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@xxxxxxxxx> --- include/linux/hyperv.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 6f4831212979..54e84ba6b554 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1687,4 +1687,8 @@ static inline unsigned long virt_to_hvpfn(void *addr) return paddr >> HV_HYP_PAGE_SHIFT; } +#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) << PAGE_SHIFT) >> HV_HYP_PAGE_SHIFT) + #endif /* _HYPERV_H */ -- 2.28.0
