7 files changed, 14 insertions, 0 deletions
diff --git a/src/cpu/x86/64bit/Makefile.inc b/src/cpu/x86/64bit/Makefile.inc
index 36c69b9520..e1cf743f6c 100644
--- a/src/cpu/x86/64bit/Makefile.inc
+++ b/src/cpu/x86/64bit/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 all_x86-y += mode_switch.S
 
 # Add --defsym=_start=0 to suppress a linker warning.
diff --git a/src/cpu/x86/Makefile.inc b/src/cpu/x86/Makefile.inc
index cb76343463..9e9b837417 100644
--- a/src/cpu/x86/Makefile.inc
+++ b/src/cpu/x86/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 subdirs-y += lapic
 subdirs-y += mtrr
 subdirs-y += pae
diff --git a/src/cpu/x86/cache/Makefile.inc b/src/cpu/x86/cache/Makefile.inc
index 759488ec7e..aaaa5fee37 100644
--- a/src/cpu/x86/cache/Makefile.inc
+++ b/src/cpu/x86/cache/Makefile.inc
@@ -1,2 +1,4 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 romstage-y += cache.c
 ramstage-y += cache.c
diff --git a/src/cpu/x86/lapic/Makefile.inc b/src/cpu/x86/lapic/Makefile.inc
index 308e9b2fa9..dd484ee6f6 100644
--- a/src/cpu/x86/lapic/Makefile.inc
+++ b/src/cpu/x86/lapic/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_AP_IN_SIPI_WAIT) += lapic_cpu_stop.c
 
 bootblock-$(CONFIG_UDELAY_LAPIC) += apic_timer.c
diff --git a/src/cpu/x86/mtrr/Makefile.inc b/src/cpu/x86/mtrr/Makefile.inc
index a78517ad36..c74f014531 100644
--- a/src/cpu/x86/mtrr/Makefile.inc
+++ b/src/cpu/x86/mtrr/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-y	+= mtrr.c
 
 romstage-y	+= earlymtrr.c
diff --git a/src/cpu/x86/pae/Makefile.inc b/src/cpu/x86/pae/Makefile.inc
index 331b5a8b38..728a3e4fa4 100644
--- a/src/cpu/x86/pae/Makefile.inc
+++ b/src/cpu/x86/pae/Makefile.inc
@@ -1,2 +1,4 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 all_x86-y += pgtbl.c
 smm-y += pgtbl.c
diff --git a/src/cpu/x86/tsc/Makefile.inc b/src/cpu/x86/tsc/Makefile.inc
index 18ce4dbe16..654c139a5a 100644
--- a/src/cpu/x86/tsc/Makefile.inc
+++ b/src/cpu/x86/tsc/Makefile.inc
@@ -1,2 +1,4 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 all_x86-y += delay_tsc.c
 smm-y += delay_tsc.c