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inteltool: Add support to print TME/MKTME status

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Print whether the SOC supports TME/MKTME. If the SOC supports the
feature, print the status of enable and lock bit from TME_ACTIVATE
MSR. -t option prints this status.

Sample output:

If TME/MKTME is supported:
============= Dumping INTEL TME/MKTME status =============
TME supported : YES
TME locked    : YES
TME enabled   : YES
====================================================

If TME/MKTME is not supported:
============= Dumping INTEL TME status =============
TME supported : NO
====================================================

Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Change-Id: I584ac4b045ba80998d454283e02d3f28ef45692d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45088
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Pratik Prajapati
2020-09-03 11:28:19 -07:00
committed by Patrick Georgi
parent 41220cd245
commit 1e67816961
3 changed files with 65 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
util/inteltool/cpu.c
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@ -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();