diff options
| author | Srinidhi N Kaushik <srinidhi.n.kaushik@intel.com> | 2020-12-02 17:20:24 -0800 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2020-12-09 14:23:22 +0000 |
| commit | 8dcd62d705fb3058f7c36e554840c3df69f244ce (patch) | |
| tree | 9e7ba108827333e9f6b4b852498860dae289e724 /src/soc/intel | |
| parent | 876b422641b7babda13c89443b694b199d73c80f (diff) | |
soc/intel/common/dmi: Add support for locking down SRL
This change adds support to lock down the DMI configuration
in dmi_lockdown_cfg() by setting Secure Register Lock (SRL)
bit in DMI control register.
BUG=b:171534504
Signed-off-by: Srinidhi N Kaushik <srinidhi.n.kaushik@intel.com>
Change-Id: I98a82ce4a2f73f8a1504e5ddf77ff2e81ae3f53f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48258
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/dmi.h | 3 | ||||
| -rw-r--r-- | src/soc/intel/common/pch/lockdown/lockdown.c | 10 |
2 files changed, 10 insertions, 3 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/dmi.h b/src/soc/intel/common/block/include/intelblocks/dmi.h index 55bf20d40d..8b12602434 100644 --- a/src/soc/intel/common/block/include/intelblocks/dmi.h +++ b/src/soc/intel/common/block/include/intelblocks/dmi.h @@ -8,6 +8,9 @@ #define PCR_DMI_DMICTL 0x2234 #define PCR_DMI_DMICTL_SRLOCK (1 << 31) +#define PCR_DMI_GCS 0x274C +#define PCR_DMI_GCS_BILD (1 << 0) + /* * Takes base, size and destination ID and configures the GPMR * for accessing the region. diff --git a/src/soc/intel/common/pch/lockdown/lockdown.c b/src/soc/intel/common/pch/lockdown/lockdown.c index b10306edcb..d9495a432b 100644 --- a/src/soc/intel/common/pch/lockdown/lockdown.c +++ b/src/soc/intel/common/pch/lockdown/lockdown.c @@ -2,6 +2,7 @@ #include <bootstate.h> #include <intelblocks/cfg.h> +#include <intelblocks/dmi.h> #include <intelblocks/fast_spi.h> #include <intelblocks/pcr.h> #include <intelpch/lockdown.h> @@ -9,9 +10,6 @@ #include <soc/pcr_ids.h> #include <soc/soc_chip.h> -#define PCR_DMI_GCS 0x274C -#define PCR_DMI_GCS_BILD (1 << 0) - /* * This function will get lockdown config specific to soc. * @@ -40,6 +38,12 @@ static void dmi_lockdown_cfg(void) * "1b": LPC/eSPI */ pcr_or8(PID_DMI, PCR_DMI_GCS, PCR_DMI_GCS_BILD); + + /* + * Set Secure Register Lock (SRL) bit in DMI control register to lock + * DMI configuration. + */ + pcr_or32(PID_DMI, PCR_DMI_DMICTL, PCR_DMI_DMICTL_SRLOCK); } static void fast_spi_lockdown_cfg(int chipset_lockdown) |