soc/intel/common/cpu: Use SoC overrides to get CPU privilege level

This patch implements a SoC overrides to check CPU privilege level
as the MSR is not consistent across platforms.

For example: On APL/GLK/DNV, it's MSR 0x120 and CNL onwards it's MSR
0x151.

BUG=b:211573253, b:211950520

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I515f0a3548bc5d6250e30f963d46f28f3c1b90b3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60900
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/soc/intel/xeon_sp/cpx/cpu.c b/src/soc/intel/xeon_sp/cpx/cpu.c
index ba417a7060..07c2db7bbf 100644
--- a/src/soc/intel/xeon_sp/cpx/cpu.c
+++ b/src/soc/intel/xeon_sp/cpx/cpu.c
@@ -32,6 +32,12 @@ static const void *microcode_patch;
 
 static const config_t *chip_config = NULL;
 
+bool cpu_soc_is_in_untrusted_mode(void)
+{
+	/* IA_UNTRUSTED_MODE is not supported in Cooper Lake */
+	return false;
+}
+
 static void xeon_configure_mca(void)
 {
 	msr_t msr;