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Subject[PATCH v4 01/11] Drivers: hv: vmbus: Always use HV_HYP_PAGE_SIZE for gpadl
Date
Since the hypervisor always uses 4K as its page size, the size of PFNs
used for gpadl should be HV_HYP_PAGE_SIZE rather than PAGE_SIZE, so
adjust this accordingly as the preparation for supporting 16K/64K page
size guests. No functional changes on x86, since PAGE_SIZE is always 4k
(equals to HV_HYP_PAGE_SIZE).

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
---
drivers/hv/channel.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 3ebda7707e46..4d0f8e5a88d6 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -22,9 +22,6 @@

#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)
{
phys_addr_t paddr;
@@ -35,7 +32,7 @@ static unsigned long virt_to_hvpfn(void *addr)
else
paddr = __pa(addr);

- return paddr >> PAGE_SHIFT;
+ return paddr >> HV_HYP_PAGE_SHIFT;
}

/*
@@ -330,7 +327,7 @@ static int create_gpadl_header(void *kbuffer, u32 size,

int pfnsum, pfncount, pfnleft, pfncurr, pfnsize;

- pagecount = size >> PAGE_SHIFT;
+ pagecount = size >> HV_HYP_PAGE_SHIFT;

/* do we need a gpadl body msg */
pfnsize = MAX_SIZE_CHANNEL_MESSAGE -
@@ -360,7 +357,7 @@ static int create_gpadl_header(void *kbuffer, u32 size,
gpadl_header->range[0].byte_count = size;
for (i = 0; i < pfncount; i++)
gpadl_header->range[0].pfn_array[i] = virt_to_hvpfn(
- kbuffer + PAGE_SIZE * i);
+ kbuffer + HV_HYP_PAGE_SIZE * i);
*msginfo = msgheader;

pfnsum = pfncount;
@@ -412,7 +409,7 @@ static int create_gpadl_header(void *kbuffer, u32 size,
*/
for (i = 0; i < pfncurr; i++)
gpadl_body->pfn[i] = virt_to_hvpfn(
- kbuffer + PAGE_SIZE * (pfnsum + i));
+ kbuffer + HV_HYP_PAGE_SIZE * (pfnsum + i));

/* add to msg header */
list_add_tail(&msgbody->msglistentry,
@@ -441,7 +438,7 @@ static int create_gpadl_header(void *kbuffer, u32 size,
gpadl_header->range[0].byte_count = size;
for (i = 0; i < pagecount; i++)
gpadl_header->range[0].pfn_array[i] = virt_to_hvpfn(
- kbuffer + PAGE_SIZE * i);
+ kbuffer + HV_HYP_PAGE_SIZE * i);

*msginfo = msgheader;
}
--
2.28.0
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