Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2
3/*
4 * Access all FEAT_IDST-handled registers that depend on more than
5 * just FEAT_AA64, and fail if we don't get an a trap with an 0x18 EC.
6 */
7
8#include <test_util.h>
9#include <kvm_util.h>
10#include <processor.h>
11
12static volatile bool sys64, undef;
13
14#define __check_sr_read(r) \
15 ({ \
16 u64 val; \
17 \
18 sys64 = false; \
19 undef = false; \
20 dsb(sy); \
21 val = read_sysreg_s(SYS_ ## r); \
22 val; \
23 })
24
25/* Fatal checks */
26#define check_sr_read(r) \
27 do { \
28 __check_sr_read(r); \
29 __GUEST_ASSERT(!undef, #r " unexpected UNDEF"); \
30 __GUEST_ASSERT(sys64, #r " didn't trap"); \
31 } while(0)
32
33
34static void guest_code(void)
35{
36 check_sr_read(CCSIDR2_EL1);
37 check_sr_read(SMIDR_EL1);
38 check_sr_read(GMID_EL1);
39
40 GUEST_DONE();
41}
42
43static void guest_sys64_handler(struct ex_regs *regs)
44{
45 sys64 = true;
46 undef = false;
47 regs->pc += 4;
48}
49
50static void guest_undef_handler(struct ex_regs *regs)
51{
52 sys64 = false;
53 undef = true;
54 regs->pc += 4;
55}
56
57static void test_run_vcpu(struct kvm_vcpu *vcpu)
58{
59 struct ucall uc;
60
61 do {
62 vcpu_run(vcpu);
63
64 switch (get_ucall(vcpu, &uc)) {
65 case UCALL_ABORT:
66 REPORT_GUEST_ASSERT(uc);
67 break;
68 case UCALL_PRINTF:
69 printf("%s", uc.buffer);
70 break;
71 case UCALL_DONE:
72 break;
73 default:
74 TEST_FAIL("Unknown ucall %lu", uc.cmd);
75 }
76 } while (uc.cmd != UCALL_DONE);
77}
78
79static void test_guest_feat_idst(void)
80{
81 struct kvm_vcpu *vcpu;
82 struct kvm_vm *vm;
83
84 /* This VM has no MTE, no SME, no CCIDX */
85 vm = vm_create_with_one_vcpu(&vcpu, guest_code);
86
87 vm_init_descriptor_tables(vm);
88 vcpu_init_descriptor_tables(vcpu);
89
90 vm_install_sync_handler(vm, VECTOR_SYNC_CURRENT,
91 ESR_ELx_EC_SYS64, guest_sys64_handler);
92 vm_install_sync_handler(vm, VECTOR_SYNC_CURRENT,
93 ESR_ELx_EC_UNKNOWN, guest_undef_handler);
94
95 test_run_vcpu(vcpu);
96
97 kvm_vm_free(vm);
98}
99
100int main(int argc, char *argv[])
101{
102 struct kvm_vcpu *vcpu;
103 struct kvm_vm *vm;
104 u64 mmfr2;
105
106 test_disable_default_vgic();
107
108 vm = vm_create_with_one_vcpu(&vcpu, NULL);
109 mmfr2 = vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_ID_AA64MMFR2_EL1));
110 __TEST_REQUIRE(FIELD_GET(ID_AA64MMFR2_EL1_IDS, mmfr2) > 0,
111 "FEAT_IDST not supported");
112 kvm_vm_free(vm);
113
114 test_guest_feat_idst();
115
116 return 0;
117}