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authorBoqun Feng <boqun.feng@gmail.com>2020-09-16 06:48:07 +0300
committerWei Liu <wei.liu@kernel.org>2020-09-28 11:55:12 +0300
commita5dda201a0384e577884d9427dc60a336ced216f (patch)
tree84fc2a76a7cc0c54ef619a3d32a12f1508c85769 /drivers/hv/channel.c
parent49971e6bad2da980686368baa34039907f62b516 (diff)
downloadlinux-a5dda201a0384e577884d9427dc60a336ced216f.tar.xz
Drivers: hv: vmbus: Always use HV_HYP_PAGE_SIZE for gpadl
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> Link: https://lore.kernel.org/r/20200916034817.30282-2-boqun.feng@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/channel.c')
-rw-r--r--drivers/hv/channel.c13
1 files 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;
}