| Message ID | 20200910143455.109293-7-boqun.feng@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Hyper-V: Support PAGE_SIZE larger than 4K | expand |
From: Boqun Feng <boqun.feng@gmail.com> Sent: Thursday, September 10, 2020 7:35 AM > > 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> > --- > include/linux/hyperv.h | 5 +++++ > 1 file changed, 5 insertions(+) > Reviewed-by: Michael Kelley <mikelley@microsoft.com>
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 6f4831212979..00c09d2ff9ad 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -1687,4 +1687,9 @@ static inline unsigned long virt_to_hvpfn(void *addr) 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 */
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> --- include/linux/hyperv.h | 5 +++++ 1 file changed, 5 insertions(+)