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Drivers: hv: vmbus: Remove use of slow_virt_to_phys() 

slow_virt_to_phys() is only implemented for arch/x86.
Remove its use in arch independent Hyper-V drivers, and
replace with test for vmalloc() address followed by
appropriate v-to-p function. This follows the typical
pattern of other drivers and avoids the need to implement
slow_virt_to_phys() for Hyper-V on ARM64.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Kelley 2018-08-02 03:08:24 +00:00 committed by Greg Kroah-Hartman
parent d3b26dd7cb
commit 6ba34171bc
1 changed files with 20 additions and 7 deletions
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27
drivers/hv/channel.c
View File

@ -29,12 +29,26 @@
#include <linux/hyperv.h>
#include <linux/uio.h>
#include <linux/interrupt.h>
#include <asm/page.h>
#include "hyperv_vmbus.h"
#define NUM_PAGES_SPANNED(addr, len) \
((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT))
static unsigned long virt_to_hvpfn(void *addr)
{
unsigned long paddr;
if (is_vmalloc_addr(addr))
paddr = page_to_phys(vmalloc_to_page(addr)) +
offset_in_page(addr);
else
paddr = __pa(addr);
return paddr >> PAGE_SHIFT;
}
/*
* vmbus_setevent- Trigger an event notification on the specified
* channel.
@ -298,8 +312,8 @@ static int create_gpadl_header(void *kbuffer, u32 size,
gpadl_header->range[0].byte_offset = 0;
gpadl_header->range[0].byte_count = size;
for (i = 0; i < pfncount; i++)
gpadl_header->range[0].pfn_array[i] = slow_virt_to_phys(
kbuffer + PAGE_SIZE * i) >> PAGE_SHIFT;
gpadl_header->range[0].pfn_array[i] = virt_to_hvpfn(
kbuffer + PAGE_SIZE * i);
*msginfo = msgheader;
pfnsum = pfncount;
@ -350,9 +364,8 @@ static int create_gpadl_header(void *kbuffer, u32 size,
* so the hypervisor guarantees that this is ok.
*/
for (i = 0; i < pfncurr; i++)
gpadl_body->pfn[i] = slow_virt_to_phys(
kbuffer + PAGE_SIZE * (pfnsum + i)) >>
PAGE_SHIFT;
gpadl_body->pfn[i] = virt_to_hvpfn(
kbuffer + PAGE_SIZE * (pfnsum + i));
/* add to msg header */
list_add_tail(&msgbody->msglistentry,
@ -380,8 +393,8 @@ static int create_gpadl_header(void *kbuffer, u32 size,
gpadl_header->range[0].byte_offset = 0;
gpadl_header->range[0].byte_count = size;
for (i = 0; i < pagecount; i++)
gpadl_header->range[0].pfn_array[i] = slow_virt_to_phys(
kbuffer + PAGE_SIZE * i) >> PAGE_SHIFT;
gpadl_header->range[0].pfn_array[i] = virt_to_hvpfn(
kbuffer + PAGE_SIZE * i);
*msginfo = msgheader;
}