Merge tag 'vboxsf-v5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hansg...
[linux-2.6-microblaze.git] / tools / testing / selftests / kvm / x86_64 / smm_test.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2018, Red Hat, Inc.
4  *
5  * Tests for SMM.
6  */
7 #define _GNU_SOURCE /* for program_invocation_short_name */
8 #include <fcntl.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <stdint.h>
12 #include <string.h>
13 #include <sys/ioctl.h>
14
15 #include "test_util.h"
16
17 #include "kvm_util.h"
18
19 #include "vmx.h"
20 #include "svm_util.h"
21
22 #define VCPU_ID       1
23
24 #define PAGE_SIZE  4096
25
26 #define SMRAM_SIZE 65536
27 #define SMRAM_MEMSLOT ((1 << 16) | 1)
28 #define SMRAM_PAGES (SMRAM_SIZE / PAGE_SIZE)
29 #define SMRAM_GPA 0x1000000
30 #define SMRAM_STAGE 0xfe
31
32 #define STR(x) #x
33 #define XSTR(s) STR(s)
34
35 #define SYNC_PORT 0xe
36 #define DONE 0xff
37
38 /*
39  * This is compiled as normal 64-bit code, however, SMI handler is executed
40  * in real-address mode. To stay simple we're limiting ourselves to a mode
41  * independent subset of asm here.
42  * SMI handler always report back fixed stage SMRAM_STAGE.
43  */
44 uint8_t smi_handler[] = {
45         0xb0, SMRAM_STAGE,    /* mov $SMRAM_STAGE, %al */
46         0xe4, SYNC_PORT,      /* in $SYNC_PORT, %al */
47         0x0f, 0xaa,           /* rsm */
48 };
49
50 static inline void sync_with_host(uint64_t phase)
51 {
52         asm volatile("in $" XSTR(SYNC_PORT)", %%al \n"
53                      : "+a" (phase));
54 }
55
56 void self_smi(void)
57 {
58         x2apic_write_reg(APIC_ICR,
59                          APIC_DEST_SELF | APIC_INT_ASSERT | APIC_DM_SMI);
60 }
61
62 void guest_code(void *arg)
63 {
64         uint64_t apicbase = rdmsr(MSR_IA32_APICBASE);
65
66         sync_with_host(1);
67
68         wrmsr(MSR_IA32_APICBASE, apicbase | X2APIC_ENABLE);
69
70         sync_with_host(2);
71
72         self_smi();
73
74         sync_with_host(4);
75
76         if (arg) {
77                 if (cpu_has_svm())
78                         generic_svm_setup(arg, NULL, NULL);
79                 else
80                         GUEST_ASSERT(prepare_for_vmx_operation(arg));
81
82                 sync_with_host(5);
83
84                 self_smi();
85
86                 sync_with_host(7);
87         }
88
89         sync_with_host(DONE);
90 }
91
92 int main(int argc, char *argv[])
93 {
94         vm_vaddr_t nested_gva = 0;
95
96         struct kvm_regs regs;
97         struct kvm_vm *vm;
98         struct kvm_run *run;
99         struct kvm_x86_state *state;
100         int stage, stage_reported;
101
102         /* Create VM */
103         vm = vm_create_default(VCPU_ID, 0, guest_code);
104
105         run = vcpu_state(vm, VCPU_ID);
106
107         vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, SMRAM_GPA,
108                                     SMRAM_MEMSLOT, SMRAM_PAGES, 0);
109         TEST_ASSERT(vm_phy_pages_alloc(vm, SMRAM_PAGES, SMRAM_GPA, SMRAM_MEMSLOT)
110                     == SMRAM_GPA, "could not allocate guest physical addresses?");
111
112         memset(addr_gpa2hva(vm, SMRAM_GPA), 0x0, SMRAM_SIZE);
113         memcpy(addr_gpa2hva(vm, SMRAM_GPA) + 0x8000, smi_handler,
114                sizeof(smi_handler));
115
116         vcpu_set_msr(vm, VCPU_ID, MSR_IA32_SMBASE, SMRAM_GPA);
117
118         if (kvm_check_cap(KVM_CAP_NESTED_STATE)) {
119                 if (nested_svm_supported())
120                         vcpu_alloc_svm(vm, &nested_gva);
121                 else if (nested_vmx_supported())
122                         vcpu_alloc_vmx(vm, &nested_gva);
123         }
124
125         if (!nested_gva)
126                 pr_info("will skip SMM test with VMX enabled\n");
127
128         vcpu_args_set(vm, VCPU_ID, 1, nested_gva);
129
130         for (stage = 1;; stage++) {
131                 _vcpu_run(vm, VCPU_ID);
132                 TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
133                             "Stage %d: unexpected exit reason: %u (%s),\n",
134                             stage, run->exit_reason,
135                             exit_reason_str(run->exit_reason));
136
137                 memset(&regs, 0, sizeof(regs));
138                 vcpu_regs_get(vm, VCPU_ID, &regs);
139
140                 stage_reported = regs.rax & 0xff;
141
142                 if (stage_reported == DONE)
143                         goto done;
144
145                 TEST_ASSERT(stage_reported == stage ||
146                             stage_reported == SMRAM_STAGE,
147                             "Unexpected stage: #%x, got %x",
148                             stage, stage_reported);
149
150                 state = vcpu_save_state(vm, VCPU_ID);
151                 kvm_vm_release(vm);
152                 kvm_vm_restart(vm, O_RDWR);
153                 vm_vcpu_add(vm, VCPU_ID);
154                 vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
155                 vcpu_load_state(vm, VCPU_ID, state);
156                 run = vcpu_state(vm, VCPU_ID);
157                 free(state);
158         }
159
160 done:
161         kvm_vm_free(vm);
162 }