blob: 8c396d08c0a4a7ed52f938a275c9e46b6c8b0f06 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
* Support KVM gust page tracking
*
* This feature allows us to track page access in guest. Currently, only
* write access is tracked.
*
* Copyright(C) 2015 Intel Corporation.
*
* Author:
* Xiao Guangrong <guangrong.xiao@linux.intel.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*/
#include <linux/kvm_host.h>
#include <asm/kvm_host.h>
#include <asm/kvm_page_track.h>
#include "mmu.h"
void kvm_page_track_free_memslot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
int i;
for (i = 0; i < KVM_PAGE_TRACK_MAX; i++)
if (!dont || free->arch.gfn_track[i] !=
dont->arch.gfn_track[i]) {
kvfree(free->arch.gfn_track[i]);
free->arch.gfn_track[i] = NULL;
}
}
int kvm_page_track_create_memslot(struct kvm_memory_slot *slot,
unsigned long npages)
{
int i;
for (i = 0; i < KVM_PAGE_TRACK_MAX; i++) {
slot->arch.gfn_track[i] = kvm_kvzalloc(npages *
sizeof(*slot->arch.gfn_track[i]));
if (!slot->arch.gfn_track[i])
goto track_free;
}
return 0;
track_free:
kvm_page_track_free_memslot(slot, NULL);
return -ENOMEM;
}
|
