diff options
Diffstat (limited to 'util/inteltool/cpu.c')
| -rw-r--r-- | util/inteltool/cpu.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/util/inteltool/cpu.c b/util/inteltool/cpu.c index 284e90b50e..db63d36729 100644 --- a/util/inteltool/cpu.c +++ b/util/inteltool/cpu.c @@ -22,6 +22,10 @@ #define MTRR_CAP_MSR 0xfe #define PRMRR_SUPPORTED (1 << 12) #define SGX_SUPPORTED (1 << 2) +#define IA32_TME_ACTIVATE 0x982 +#define TME_SUPPORTED (1 << 13) +#define TME_LOCKED (1) +#define TME_ENABLED (1 << 1) int fd_msr; @@ -212,6 +216,55 @@ int print_sgx(void) return error; } +static int is_tme_supported() +{ + cpuid_result_t cpuid_regs; + + /* + * CPUID leaf 0x7 subleaf 0x0 to detect TME support + * https://software.intel.com/sites/default/files/managed/a5/16/Multi-Key + * -Total-Memory-Encryption-Spec.pdf + */ + + cpuid_regs = cpuid_ext(0x7, 0x0); + return (cpuid_regs.ecx & TME_SUPPORTED); +} + +static msr_t read_tme_activate_msr(){ + return rdmsr_from_cpu(0, IA32_TME_ACTIVATE); +} + +static int is_tme_locked() +{ + msr_t data = read_tme_activate_msr(); + return (data.lo & TME_LOCKED); +} + +static int is_tme_enabled() +{ + msr_t data = read_tme_activate_msr(); + return (data.lo & TME_ENABLED); +} + +void print_tme(void) +{ +#ifndef __DARWIN__ + int tme_supported = is_tme_supported(); + + printf("\n============= Dumping INTEL TME status =============\n"); + + printf("TME supported : %s\n", tme_supported ? "YES" : "NO"); + + if (tme_supported) { + printf("TME locked : %s\n", is_tme_locked() ? "YES" : "NO"); + printf("TME enabled : %s\n", is_tme_enabled() ? "YES" : "NO"); + } + printf("====================================================\n"); +#else + printf("Not Implemented\n"); +#endif +} + int print_intel_core_msrs(void) { unsigned int i, core, id, core_num = get_number_of_cores(); |