4 files changed, 24 insertions, 0 deletions
diff --git a/src/cpu/amd/pi/00630F01/fixme.c b/src/cpu/amd/pi/00630F01/fixme.c
index fcdc9254d9..3be3690227 100644
--- a/src/cpu/amd/pi/00630F01/fixme.c
+++ b/src/cpu/amd/pi/00630F01/fixme.c
@@ -77,4 +77,10 @@ void amd_initmmio(void)
 	LibAmdMsrWrite (0x20C, &MsrReg, &StdHeader);
 	MsrReg = ((1ULL << CONFIG_CPU_ADDR_BITS) - CACHE_ROM_SIZE) | 0x800ull;
 	LibAmdMsrWrite (0x20D, &MsrReg, &StdHeader);
+
+	if (IS_ENABLED(CONFIG_UDELAY_LAPIC)){
+		LibAmdMsrRead(0x1B, &MsrReg, &StdHeader);
+		MsrReg |= 1 << 11;
+		LibAmdMsrWrite(0x1B, &MsrReg, &StdHeader);
+	}
 }
diff --git a/src/cpu/amd/pi/00660F01/fixme.c b/src/cpu/amd/pi/00660F01/fixme.c
index 6770287bca..20353a0a38 100644
--- a/src/cpu/amd/pi/00660F01/fixme.c
+++ b/src/cpu/amd/pi/00660F01/fixme.c
@@ -84,4 +84,10 @@ void amd_initmmio(void)
 	LibAmdMsrWrite (0x20C, &MsrReg, &StdHeader);
 	MsrReg = ((1ULL << CONFIG_CPU_ADDR_BITS) - CACHE_ROM_SIZE) | 0x800ull;
 	LibAmdMsrWrite (0x20D, &MsrReg, &StdHeader);
+
+	if (IS_ENABLED(CONFIG_UDELAY_LAPIC)){
+		LibAmdMsrRead(0x1B, &MsrReg, &StdHeader);
+		MsrReg |= 1 << 11;
+		LibAmdMsrWrite(0x1B, &MsrReg, &StdHeader);
+	}
 }
diff --git a/src/cpu/amd/pi/00670F00/fixme.c b/src/cpu/amd/pi/00670F00/fixme.c
index 86f5acf58a..e7d7ba5878 100644
--- a/src/cpu/amd/pi/00670F00/fixme.c
+++ b/src/cpu/amd/pi/00670F00/fixme.c
@@ -88,4 +88,10 @@ void amd_initmmio(void)
 	MsrReg = ((1ULL << CONFIG_CPU_ADDR_BITS) - CACHE_ROM_SIZE) | \
 		0x800ull;
 	LibAmdMsrWrite(0x20D, &MsrReg, &StdHeader);
+
+	if (IS_ENABLED(CONFIG_UDELAY_LAPIC)){
+		LibAmdMsrRead(0x1B, &MsrReg, &StdHeader);
+		MsrReg |= 1 << 11;
+		LibAmdMsrWrite(0x1B, &MsrReg, &StdHeader);
+	}
 }
diff --git a/src/cpu/amd/pi/00730F01/fixme.c b/src/cpu/amd/pi/00730F01/fixme.c
index fcdf49815f..674e5c1cb2 100644
--- a/src/cpu/amd/pi/00730F01/fixme.c
+++ b/src/cpu/amd/pi/00730F01/fixme.c
@@ -89,4 +89,10 @@ void amd_initmmio(void)
 	LibAmdMsrWrite (0x20C, &MsrReg, &StdHeader);
 	MsrReg = ((1ULL << CONFIG_CPU_ADDR_BITS) - CACHE_ROM_SIZE) | 0x800ull;
 	LibAmdMsrWrite (0x20D, &MsrReg, &StdHeader);
+
+	if (IS_ENABLED(CONFIG_UDELAY_LAPIC)){
+		LibAmdMsrRead(0x1B, &MsrReg, &StdHeader);
+		MsrReg |= 1 << 11;
+		LibAmdMsrWrite(0x1B, &MsrReg, &StdHeader);
+	}
 }