diff options
Diffstat (limited to 'src/cpu/intel')
| -rw-r--r-- | src/cpu/intel/common/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/cpu/intel/common/common_init.c | 25 |
2 files changed, 27 insertions, 0 deletions
diff --git a/src/cpu/intel/common/Makefile.inc b/src/cpu/intel/common/Makefile.inc index c4ac57ebcf..8b247abe17 100644 --- a/src/cpu/intel/common/Makefile.inc +++ b/src/cpu/intel/common/Makefile.inc @@ -1,6 +1,8 @@ ## SPDX-License-Identifier: GPL-2.0-only +bootblock-$(CONFIG_CPU_INTEL_COMMON) += common_init.c romstage-$(CONFIG_CPU_INTEL_COMMON) += common_init.c +postcar-$(CONFIG_CPU_INTEL_COMMON) += common_init.c ramstage-$(CONFIG_CPU_INTEL_COMMON) += common_init.c ramstage-$(CONFIG_CPU_INTEL_COMMON) += hyperthreading.c ramstage-$(CONFIG_CPU_INTEL_COMMON_VOLTAGE) += voltage.c diff --git a/src/cpu/intel/common/common_init.c b/src/cpu/intel/common/common_init.c index f8608ae029..ff00f0247f 100644 --- a/src/cpu/intel/common/common_init.c +++ b/src/cpu/intel/common/common_init.c @@ -238,3 +238,28 @@ bool is_tme_supported(void) cpuid_regs = cpuid_ext(CPUID_STRUCT_EXTENDED_FEATURE_FLAGS, 0x0); return (cpuid_regs.ecx & CPUID_EXT_FEATURE_TME_SUPPORTED); } + +/* + * Get number of address bits used by Total Memory Encryption (TME) + * + * Returns TME_ACTIVATE[MK_TME_KEYID_BITS] (MSR 0x982 Bits[32-35]). + * + * NOTE: This function should be called after MK-TME features has been + * configured in the MSRs according to the capabilities and platform + * configuration. For instance, after FSP-M. + */ +static int get_tme_keyid_bits(void) +{ + msr_t msr; + + msr = rdmsr(MSR_TME_ACTIVATE); + return msr.hi & TME_ACTIVATE_HI_KEYID_BITS_MASK; +} + +int get_reserved_phys_addr_bits(void) +{ + if (!is_tme_supported()) + return 0; + + return get_tme_keyid_bits(); +} |