From: Michael Kelley <mikel...@microsoft.com>
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 <mikel...@microsoft.com>
---
drivers/hv/channel.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index ba0a092..d972a12 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -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;
}
--
1.8.3.1
_______________________________________________
devel mailing list
de...@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
