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Drivers: hv: vmbus: Move virt_to_hvpfn() to hyperv header

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There will be more places other than vmbus where we need to calculate
the Hyper-V page PFN from a virtual address, so move virt_to_hvpfn() to
hyperv generic header.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200916034817.30282-6-boqun.feng@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Boqun Feng 2020-09-16 11:48:11 +08:00 committed by Wei Liu
parent ef514d3e38
commit bca6b91dfd
2 changed files with 15 additions and 13 deletions
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13
drivers/hv/channel.c
View File

@ -22,19 +22,6 @@
#include "hyperv_vmbus.h"
static unsigned long virt_to_hvpfn(void *addr)
{
phys_addr_t paddr;
if (is_vmalloc_addr(addr))
paddr = page_to_phys(vmalloc_to_page(addr)) +
offset_in_page(addr);
else
paddr = __pa(addr);
return paddr >> HV_HYP_PAGE_SHIFT;
}
/*
* hv_gpadl_size - Return the real size of a gpadl, the size that Hyper-V uses
*

15
include/linux/hyperv.h
View File

@ -14,6 +14,7 @@
#include <uapi/linux/hyperv.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <linux/scatterlist.h>
#include <linux/list.h>
@ -23,6 +24,7 @@
#include <linux/mod_devicetable.h>
#include <linux/interrupt.h>
#include <linux/reciprocal_div.h>
#include <asm/hyperv-tlfs.h>
#define MAX_PAGE_BUFFER_COUNT 32
#define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
@ -1676,4 +1678,17 @@ struct hyperv_pci_block_ops {
extern struct hyperv_pci_block_ops hvpci_block_ops;
static inline unsigned long virt_to_hvpfn(void *addr)
{
phys_addr_t paddr;
if (is_vmalloc_addr(addr))
paddr = page_to_phys(vmalloc_to_page(addr)) +
offset_in_page(addr);
else
paddr = __pa(addr);
return paddr >> HV_HYP_PAGE_SHIFT;
}
#endif /* _HYPERV_H */