[coreboot-gerrit] Change in coreboot[master]: security/intel/txt: use mca_get_bank_count()

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/56187 )

Change subject: security/intel/txt: use mca_get_bank_count()
......................................................................

security/intel/txt: use mca_get_bank_count()

Use the common mca_get_bank_count function instead of open-coding the
functionality to get the MCA bank number.

Change-Id: I28244c975ee34d36d0b44df092d4a62a01c3c79c
Signed-off-by: Felix Held 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56187
Tested-by: build bot (Jenkins) 
Reviewed-by: Marshall Dawson 
---
M src/security/intel/txt/common.c
1 file changed, 1 insertion(+), 2 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Marshall Dawson: Looks good to me, approved

diff --git a/src/security/intel/txt/common.c b/src/security/intel/txt/common.c
index 239e152..011e8cc 100644
--- a/src/security/intel/txt/common.c
+++ b/src/security/intel/txt/common.c
@@ -481,8 +481,7 @@
    	* Make sure there are no uncorrectable MCE errors.
    	* Intel 64 and IA-32 Architectures Software Developer Manuals Vol 2D
    	*/
-		msr = rdmsr(IA32_MCG_CAP);
-		size_t max_mc_msr = msr.lo & MCA_BANKS_MASK;
+		size_t max_mc_msr = mca_get_bank_count();
    	for (size_t i = 0; i < max_mc_msr; i++) {
    		msr = rdmsr(IA32_MC0_STATUS + 4 * i);
    		if (!(msr.hi & MCA_STATUS_HI_UC))