Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 microcode loading update from Ingo Molnar:
 "Two main changes that improve microcode loading on AMD CPUs:

   - Add support for all-in-one binary microcode files that concatenate
     the microcode images of multiple processor families, by Jacob Shin

   - Add early microcode loading (embedded in the initrd) support, also
     by Jacob Shin"

* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, microcode, amd: Another early loading fixup
  x86, microcode, amd: Allow multiple families' bin files appended together
  x86, microcode, amd: Make find_ucode_in_initrd() __init
  x86, microcode, amd: Fix warnings and errors on with CONFIG_MICROCODE=m
  x86, microcode, amd: Early microcode patch loading support for AMD
  x86, microcode, amd: Refactor functions to prepare for early loading
  x86, microcode: Vendor abstract out save_microcode_in_initrd()
  x86, microcode, intel: Correct typo in printk

9 files changed, 509 insertions, 87 deletions

diff --git a/Documentation/x86/early-microcode.txt b/Documentation/x86/early-microcode.txt
index 4aaf0dfb0cb8..d62bea6796da 100644
--- a/Documentation/x86/early-microcode.txt
+++ b/Documentation/x86/early-microcode.txt
@@ -11,7 +11,8 @@ file and loaded to CPUs during boot time.
 The format of the combined initrd image is microcode in cpio format followed by
 the initrd image (maybe compressed). Kernel parses the combined initrd image
 during boot time. The microcode file in cpio name space is:
-kernel/x86/microcode/GenuineIntel.bin
+on Intel: kernel/x86/microcode/GenuineIntel.bin
+on AMD  : kernel/x86/microcode/AuthenticAMD.bin
 
 During BSP boot (before SMP starts), if the kernel finds the microcode file in
 the initrd file, it parses the microcode and saves matching microcode in memory.
@@ -34,10 +35,8 @@ original initrd image /boot/initrd-3.5.0.img.
 
 mkdir initrd
 cd initrd
-mkdir kernel
-mkdir kernel/x86
-mkdir kernel/x86/microcode
-cp ../microcode.bin kernel/x86/microcode/GenuineIntel.bin
-find .|cpio -oc >../ucode.cpio
+mkdir -p kernel/x86/microcode
+cp ../microcode.bin kernel/x86/microcode/GenuineIntel.bin (or AuthenticAMD.bin)
+find . | cpio -o -H newc >../ucode.cpio
 cd ..
 cat ucode.cpio /boot/initrd-3.5.0.img >/boot/initrd-3.5.0.ucode.img
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c49b4dc8ffe0..34d1db1e7f40 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1058,8 +1058,16 @@ config MICROCODE_INTEL_LIB
         depends on MICROCODE_INTEL
 
 config MICROCODE_INTEL_EARLY
+        def_bool n
+
+config MICROCODE_AMD_EARLY
+        def_bool n
+
+config MICROCODE_EARLY
         bool "Early load microcode"
-        depends on MICROCODE_INTEL && BLK_DEV_INITRD
+        depends on MICROCODE=y && BLK_DEV_INITRD
+        select MICROCODE_INTEL_EARLY if MICROCODE_INTEL
+        select MICROCODE_AMD_EARLY if MICROCODE_AMD
         default y
         help
           This option provides functionality to read additional microcode data
@@ -1067,10 +1075,6 @@ config MICROCODE_INTEL_EARLY
           microcode to CPU's as early as possible. No functional change if no
           microcode data is glued to the initrd, therefore it's safe to say Y.
 
-config MICROCODE_EARLY
-        def_bool y
-        depends on MICROCODE_INTEL_EARLY
-
 config X86_MSR
         tristate "/dev/cpu/*/msr - Model-specific register support"
         ---help---
diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
new file mode 100644
index 000000000000..c6b043f40271
--- /dev/null
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -0,0 +1,78 @@
+#ifndef _ASM_X86_MICROCODE_AMD_H
+#define _ASM_X86_MICROCODE_AMD_H
+
+#include <asm/microcode.h>
+
+#define UCODE_MAGIC                     0x00414d44
+#define UCODE_EQUIV_CPU_TABLE_TYPE      0x00000000
+#define UCODE_UCODE_TYPE                0x00000001
+
+#define SECTION_HDR_SIZE                8
+#define CONTAINER_HDR_SZ                12
+
+struct equiv_cpu_entry {
+        u32     installed_cpu;
+        u32     fixed_errata_mask;
+        u32     fixed_errata_compare;
+        u16     equiv_cpu;
+        u16     res;
+} __attribute__((packed));
+
+struct microcode_header_amd {
+        u32     data_code;
+        u32     patch_id;
+        u16     mc_patch_data_id;
+        u8      mc_patch_data_len;
+        u8      init_flag;
+        u32     mc_patch_data_checksum;
+        u32     nb_dev_id;
+        u32     sb_dev_id;
+        u16     processor_rev_id;
+        u8      nb_rev_id;
+        u8      sb_rev_id;
+        u8      bios_api_rev;
+        u8      reserved1[3];
+        u32     match_reg[8];
+} __attribute__((packed));
+
+struct microcode_amd {
+        struct microcode_header_amd     hdr;
+        unsigned int                    mpb[0];
+};
+
+static inline u16 find_equiv_id(struct equiv_cpu_entry *equiv_cpu_table,
+                                unsigned int sig)
+{
+        int i = 0;
+
+        if (!equiv_cpu_table)
+                return 0;
+
+        while (equiv_cpu_table[i].installed_cpu != 0) {
+                if (sig == equiv_cpu_table[i].installed_cpu)
+                        return equiv_cpu_table[i].equiv_cpu;
+
+                i++;
+        }
+        return 0;
+}
+
+extern int __apply_microcode_amd(struct microcode_amd *mc_amd);
+extern int apply_microcode_amd(int cpu);
+extern enum ucode_state load_microcode_amd(int cpu, const u8 *data, size_t size);
+
+#ifdef CONFIG_MICROCODE_AMD_EARLY
+#ifdef CONFIG_X86_32
+#define MPB_MAX_SIZE PAGE_SIZE
+extern u8 amd_bsp_mpb[MPB_MAX_SIZE];
+#endif
+extern void __init load_ucode_amd_bsp(void);
+extern void __cpuinit load_ucode_amd_ap(void);
+extern int __init save_microcode_in_initrd_amd(void);
+#else
+static inline void __init load_ucode_amd_bsp(void) {}
+static inline void __cpuinit load_ucode_amd_ap(void) {}
+static inline int __init save_microcode_in_initrd_amd(void) { return -EINVAL; }
+#endif
+
+#endif /* _ASM_X86_MICROCODE_AMD_H */
diff --git a/arch/x86/include/asm/microcode_intel.h b/arch/x86/include/asm/microcode_intel.h
index 5356f927d411..87a085333cbf 100644
--- a/arch/x86/include/asm/microcode_intel.h
+++ b/arch/x86/include/asm/microcode_intel.h
@@ -67,10 +67,12 @@ update_match_revision(struct microcode_header_intel *mc_header, int rev);
 extern void __init load_ucode_intel_bsp(void);
 extern void __cpuinit load_ucode_intel_ap(void);
 extern void show_ucode_info_early(void);
+extern int __init save_microcode_in_initrd_intel(void);
 #else
 static inline __init void load_ucode_intel_bsp(void) {}
 static inline __cpuinit void load_ucode_intel_ap(void) {}
 static inline void show_ucode_info_early(void) {}
+static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
 #endif
 
 #if defined(CONFIG_MICROCODE_INTEL_EARLY) && defined(CONFIG_HOTPLUG_CPU)
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 4ce822ed58f5..612ed3435c0d 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -93,6 +93,7 @@ obj-$(CONFIG_MICROCODE_INTEL_LIB)	+= microcode_intel_lib.o
 microcode-y                             := microcode_core.o
 microcode-$(CONFIG_MICROCODE_INTEL)     += microcode_intel.o
 microcode-$(CONFIG_MICROCODE_AMD)       += microcode_amd.o
+obj-$(CONFIG_MICROCODE_AMD_EARLY)       += microcode_amd_early.o
 obj-$(CONFIG_MICROCODE)                 += microcode.o