diff mbox series

[v3,05/11] Drivers: hv: vmbus: Move virt_to_hvpfn() to hyperv header

Message ID 20200910143455.109293-6-boqun.feng@gmail.com (mailing list archive)
State New, archived
Headers show
Series Hyper-V: Support PAGE_SIZE larger than 4K | expand

Commit Message

Boqun Feng Sept. 10, 2020, 2:34 p.m. UTC 
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>
---
 drivers/hv/channel.c   | 13 -------------
 include/linux/hyperv.h | 15 +++++++++++++++
 2 files changed, 15 insertions(+), 13 deletions(-)

Comments

Michael Kelley (LINUX) Sept. 12, 2020, 7:32 p.m. UTC | #1 
From: Boqun Feng <boqun.feng@gmail.com> Sent: Thursday, September 10, 2020 7:35 AM
> 
> 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>
> ---
>  drivers/hv/channel.c   | 13 -------------
>  include/linux/hyperv.h | 15 +++++++++++++++
>  2 files changed, 15 insertions(+), 13 deletions(-)
> 

Reviewed-by:  Michael Kelley <mikelley@microsoft.com>
diff mbox series

Patch

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 45267b6d069e..fbdda9938039 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -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
  *
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 7d16dd28aa48..6f4831212979 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -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 */
@@ -1672,4 +1674,17 @@  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 */