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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
// SPDX-License-Identifier: GPL-2.0
/*
* Test for x86 KVM_CAP_MSR_PLATFORM_INFO
*
* Copyright (C) 2018, Google LLC.
*
* This work is licensed under the terms of the GNU GPL, version 2.
*
* Verifies expected behavior of controlling guest access to
* MSR_PLATFORM_INFO.
*/
#define _GNU_SOURCE /* for program_invocation_short_name */
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
#define MSR_PLATFORM_INFO_MAX_TURBO_RATIO 0xff00
static void guest_code(void)
{
uint64_t msr_platform_info;
for (;;) {
msr_platform_info = rdmsr(MSR_PLATFORM_INFO);
GUEST_SYNC(msr_platform_info);
asm volatile ("inc %r11");
}
}
static void test_msr_platform_info_enabled(struct kvm_vcpu *vcpu)
{
struct ucall uc;
vm_enable_cap(vcpu->vm, KVM_CAP_MSR_PLATFORM_INFO, true);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
get_ucall(vcpu, &uc);
TEST_ASSERT(uc.cmd == UCALL_SYNC,
"Received ucall other than UCALL_SYNC: %lu", uc.cmd);
TEST_ASSERT((uc.args[1] & MSR_PLATFORM_INFO_MAX_TURBO_RATIO) ==
MSR_PLATFORM_INFO_MAX_TURBO_RATIO,
"Expected MSR_PLATFORM_INFO to have max turbo ratio mask: %i.",
MSR_PLATFORM_INFO_MAX_TURBO_RATIO);
}
static void test_msr_platform_info_disabled(struct kvm_vcpu *vcpu)
{
vm_enable_cap(vcpu->vm, KVM_CAP_MSR_PLATFORM_INFO, false);
vcpu_run(vcpu);
TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_SHUTDOWN);
}
int main(int argc, char *argv[])
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
uint64_t msr_platform_info;
TEST_REQUIRE(kvm_has_cap(KVM_CAP_MSR_PLATFORM_INFO));
vm = vm_create_with_one_vcpu(&vcpu, guest_code);
msr_platform_info = vcpu_get_msr(vcpu, MSR_PLATFORM_INFO);
vcpu_set_msr(vcpu, MSR_PLATFORM_INFO,
msr_platform_info | MSR_PLATFORM_INFO_MAX_TURBO_RATIO);
test_msr_platform_info_enabled(vcpu);
test_msr_platform_info_disabled(vcpu);
vcpu_set_msr(vcpu, MSR_PLATFORM_INFO, msr_platform_info);
kvm_vm_free(vm);
return 0;
}
|
