[coreboot-gerrit] Change in coreboot[master]: include/cpu/x86/msr: add mca_clear_status function

[Felix Held (Code Review)]

Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/56258 )

Change subject: include/cpu/x86/msr: add mca_clear_status function
......................................................................

include/cpu/x86/msr: add mca_clear_status function

In multiple locations within the coreboot tree all available
IA32_MC_STATUS registers are cleared, so add this to the common code to
avoid duplication of code.

Change-Id: I04af23c16021b0ce90f7105f7a3856bd26ffa736
Signed-off-by: Felix Held 
---
M src/include/cpu/x86/msr.h
1 file changed, 10 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/58/56258/1

diff --git a/src/include/cpu/x86/msr.h b/src/include/cpu/x86/msr.h
index dd969d7..51ef2e0 100644
--- a/src/include/cpu/x86/msr.h
+++ b/src/include/cpu/x86/msr.h
@@ -166,6 +166,16 @@
    return msr.lo & MCA_BANKS_MASK;
 }

+/* Clear all MCA status registers */
+static inline void mca_clear_status(void)
+{
+	const unsigned int num_banks = mca_get_bank_count();
+	const msr_t msr = {.lo = 0, .hi = 0};
+
+	for (unsigned int i = 0 ; i < num_banks ; i++)
+		wrmsr(IA32_MC_STATUS(i), msr);
+}
+
 /* Helpers for interpreting MC[i]_STATUS */

static inline int mca_valid(msr_t msr)