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authorAngel Pons <th3fanbus@gmail.com>2020-10-15 23:48:25 +0200
committerAngel Pons <th3fanbus@gmail.com>2020-10-22 19:59:53 +0000
commit5a6daa6b7288eed6561d90fdb7afebbc01ade869 (patch)
treec13f87d2dde0fc1ae0dba230231694adfe375d75 /src/security/intel
parent92eab64a43098849dd0784c11620e3dbe9d8eb35 (diff)
downloadcoreboot-5a6daa6b7288eed6561d90fdb7afebbc01ade869.tar.xz
sec/intel/txt: Move DPR size to Kconfig
Instead of hardcoding the size in code, expose it as a Kconfig symbol. This allows platform code to program the size in the MCH DPR register. Change-Id: I9b9bcfc7ceefea6882f8133a6c3755da2e64a80c Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/46491 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/security/intel')
-rw-r--r--src/security/intel/txt/Kconfig9
-rw-r--r--src/security/intel/txt/ramstage.c2
2 files changed, 10 insertions, 1 deletions
diff --git a/src/security/intel/txt/Kconfig b/src/security/intel/txt/Kconfig
index 3dd912ea6e..b1d0475edf 100644
--- a/src/security/intel/txt/Kconfig
+++ b/src/security/intel/txt/Kconfig
@@ -31,6 +31,15 @@ config INTEL_TXT_SINITACM_FILE
access to Intel resources. Or for some platforms found inside the
blob repository.
+config INTEL_TXT_DPR_SIZE
+ int
+ range 0 255
+ default 3
+ help
+ Specify the size the DPR region needs to have. On at least Haswell,
+ the MRC does not have an input to specify the size of DPR, so this
+ field is only used to check if the programmed size is large enough.
+
config INTEL_TXT_LOGGING
bool "Enable verbose logging"
help
diff --git a/src/security/intel/txt/ramstage.c b/src/security/intel/txt/ramstage.c
index f532a2fbd8..8d9f5d9b3c 100644
--- a/src/security/intel/txt/ramstage.c
+++ b/src/security/intel/txt/ramstage.c
@@ -254,7 +254,7 @@ static void lockdown_intel_txt(void *unused)
return;
}
- if (dpr.size < 3) {
+ if (dpr.size < CONFIG_INTEL_TXT_DPR_SIZE) {
printk(BIOS_ERR, "TEE-TXT: MCH DPR configured size is too small.\n");
return;
}