1 /* msr tests */ 2 3 #include "libcflat.h" 4 #include "processor.h" 5 #include "msr.h" 6 7 struct msr_info { 8 int index; 9 const char *name; 10 struct tc { 11 int valid; 12 unsigned long long value; 13 unsigned long long expected; 14 } val_pairs[20]; 15 }; 16 17 18 #define addr_64 0x0000123456789abcULL 19 20 struct msr_info msr_info[] = 21 { 22 { .index = 0x00000174, .name = "IA32_SYSENTER_CS", 23 .val_pairs = {{ .valid = 1, .value = 0x1234, .expected = 0x1234}} 24 }, 25 { .index = 0x00000175, .name = "MSR_IA32_SYSENTER_ESP", 26 .val_pairs = {{ .valid = 1, .value = addr_64, .expected = addr_64}} 27 }, 28 { .index = 0x00000176, .name = "IA32_SYSENTER_EIP", 29 .val_pairs = {{ .valid = 1, .value = addr_64, .expected = addr_64}} 30 }, 31 { .index = 0x000001a0, .name = "MSR_IA32_MISC_ENABLE", 32 // reserved: 1:2, 4:6, 8:10, 13:15, 17, 19:21, 24:33, 35:63 33 .val_pairs = {{ .valid = 1, .value = 0x400c51889, .expected = 0x400c51889}} 34 }, 35 { .index = 0x00000277, .name = "MSR_IA32_CR_PAT", 36 .val_pairs = {{ .valid = 1, .value = 0x07070707, .expected = 0x07070707}} 37 }, 38 { .index = 0xc0000100, .name = "MSR_FS_BASE", 39 .val_pairs = {{ .valid = 1, .value = addr_64, .expected = addr_64}} 40 }, 41 { .index = 0xc0000101, .name = "MSR_GS_BASE", 42 .val_pairs = {{ .valid = 1, .value = addr_64, .expected = addr_64}} 43 }, 44 { .index = 0xc0000102, .name = "MSR_KERNEL_GS_BASE", 45 .val_pairs = {{ .valid = 1, .value = addr_64, .expected = addr_64}} 46 }, 47 #ifdef __x86_64__ 48 { .index = 0xc0000080, .name = "MSR_EFER", 49 .val_pairs = {{ .valid = 1, .value = 0xD00, .expected = 0xD00}} 50 }, 51 #endif 52 { .index = 0xc0000082, .name = "MSR_LSTAR", 53 .val_pairs = {{ .valid = 1, .value = addr_64, .expected = addr_64}} 54 }, 55 { .index = 0xc0000083, .name = "MSR_CSTAR", 56 .val_pairs = {{ .valid = 1, .value = addr_64, .expected = addr_64}} 57 }, 58 { .index = 0xc0000084, .name = "MSR_SYSCALL_MASK", 59 .val_pairs = {{ .valid = 1, .value = 0xffffffff, .expected = 0xffffffff}} 60 }, 61 62 // MSR_IA32_DEBUGCTLMSR needs svm feature LBRV 63 // MSR_VM_HSAVE_PA only AMD host 64 }; 65 66 static int find_msr_info(int msr_index) 67 { 68 int i; 69 for (i = 0; i < sizeof(msr_info)/sizeof(msr_info[0]) ; i++) { 70 if (msr_info[i].index == msr_index) { 71 return i; 72 } 73 } 74 return -1; 75 } 76 77 static void test_msr_rw(int msr_index, unsigned long long input, unsigned long long expected) 78 { 79 unsigned long long r = 0; 80 int index; 81 const char *sptr; 82 if ((index = find_msr_info(msr_index)) != -1) { 83 sptr = msr_info[index].name; 84 } else { 85 printf("couldn't find name for msr # %#x, skipping\n", msr_index); 86 return; 87 } 88 wrmsr(msr_index, input); 89 r = rdmsr(msr_index); 90 if (expected != r) { 91 printf("testing %s: output = %#x:%#x expected = %#x:%#x\n", sptr, 92 (u32)(r >> 32), (u32)r, (u32)(expected >> 32), (u32)expected); 93 } 94 report("%s", expected == r, sptr); 95 } 96 97 int main(int ac, char **av) 98 { 99 int i, j; 100 for (i = 0 ; i < sizeof(msr_info) / sizeof(msr_info[0]); i++) { 101 for (j = 0; j < sizeof(msr_info[i].val_pairs) / sizeof(msr_info[i].val_pairs[0]); j++) { 102 if (msr_info[i].val_pairs[j].valid) { 103 test_msr_rw(msr_info[i].index, msr_info[i].val_pairs[j].value, msr_info[i].val_pairs[j].expected); 104 } else { 105 break; 106 } 107 } 108 } 109 110 return report_summary(); 111 } 112 113