Merge tag 'mvebu-fixes-4.8-1' of git://git.infradead.org/linux-mvebu into fixes

[cascardo/linux.git] / arch / powerpc / lib / feature-fixups.c

diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c
index defb299..043415f 100644 (file)
--- a/arch/powerpc/lib/feature-fixups.c
+++ b/arch/powerpc/lib/feature-fixups.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/types.h>
+#include <linux/jump_label.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/init.h>
@@ -152,9 +153,18 @@ static void do_final_fixups(void)
 #endif
 }
 
-void apply_feature_fixups(void)
+static unsigned long __initdata saved_cpu_features;
+static unsigned int __initdata saved_mmu_features;
+#ifdef CONFIG_PPC64
+static unsigned long __initdata saved_firmware_features;
+#endif
+
+void __init apply_feature_fixups(void)
 {
-       struct cpu_spec *spec = *PTRRELOC(&cur_cpu_spec);
+       struct cpu_spec *spec = PTRRELOC(*PTRRELOC(&cur_cpu_spec));
+
+       *PTRRELOC(&saved_cpu_features) = spec->cpu_features;
+       *PTRRELOC(&saved_mmu_features) = spec->mmu_features;
 
        /*
         * Apply the CPU-specific and firmware specific fixups to kernel text
@@ -173,12 +183,40 @@ void apply_feature_fixups(void)
                         PTRRELOC(&__stop___lwsync_fixup));
 
 #ifdef CONFIG_PPC64
+       saved_firmware_features = powerpc_firmware_features;
        do_feature_fixups(powerpc_firmware_features,
                          &__start___fw_ftr_fixup, &__stop___fw_ftr_fixup);
 #endif
        do_final_fixups();
 }
 
+void __init setup_feature_keys(void)
+{
+       /*
+        * Initialise jump label. This causes all the cpu/mmu_has_feature()
+        * checks to take on their correct polarity based on the current set of
+        * CPU/MMU features.
+        */
+       jump_label_init();
+       cpu_feature_keys_init();
+       mmu_feature_keys_init();
+}
+
+static int __init check_features(void)
+{
+       WARN(saved_cpu_features != cur_cpu_spec->cpu_features,
+            "CPU features changed after feature patching!\n");
+       WARN(saved_mmu_features != cur_cpu_spec->mmu_features,
+            "MMU features changed after feature patching!\n");
+#ifdef CONFIG_PPC64
+       WARN(saved_firmware_features != powerpc_firmware_features,
+            "Firmware features changed after feature patching!\n");
+#endif
+
+       return 0;
+}
+late_initcall(check_features);
+
 #ifdef CONFIG_FTR_FIXUP_SELFTEST
 
 #define check(x)       \