diff options
Diffstat (limited to 'src/drivers/intel/ptt/ptt.c')
| -rw-r--r-- | src/drivers/intel/ptt/ptt.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/drivers/intel/ptt/ptt.c b/src/drivers/intel/ptt/ptt.c index 67ed0eebb7..5b0918bada 100644 --- a/src/drivers/intel/ptt/ptt.c +++ b/src/drivers/intel/ptt/ptt.c @@ -1,8 +1,11 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <arch/mmio.h> #include <soc/pci_devs.h> #include <device/pci_ops.h> #include <console/console.h> +#include <security/intel/txt/txt_register.h> +#include <stdint.h> #include "ptt.h" @@ -27,6 +30,7 @@ static uint32_t read_register(int reg_addr) */ bool ptt_active(void) { + uint32_t sts_ftif; uint32_t fwsts4 = read_register(PCI_ME_HFSTS4); if (fwsts4 == 0xFFFFFFFF) @@ -34,6 +38,14 @@ bool ptt_active(void) if ((fwsts4 & PTT_ENABLE) == 0) { printk(BIOS_DEBUG, "Intel ME Establishment bit not valid.\n"); + sts_ftif = read32p(TXT_STS_FTIF); + + if (sts_ftif != 0 && sts_ftif != UINT32_MAX) { + if ((sts_ftif & TXT_PTT_PRESENT) == TXT_PTT_PRESENT) { + printk(BIOS_DEBUG, "TXT_STS_FTIF: PTT present and active\n"); + return true; + } + } return false; } |