x86/microcode/intel: Remove intel_lib.c

Its functions are used in intel.c only now, so get rid of it. Make
functions static.

No functionality change.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20161025095522.11964-11-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/include/asm/microcode_intel.h b/arch/x86/include/asm/microcode_intel.h
index 5e69154..195becc 100644 (file)
--- a/arch/x86/include/asm/microcode_intel.h
+++ b/arch/x86/include/asm/microcode_intel.h
@@ -52,10 +52,6 @@ struct extended_sigtable {
 
 #define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
 
-extern int has_newer_microcode(void *mc, unsigned int csig, int cpf, int rev);
-extern int microcode_sanity_check(void *mc, int print_err);
-extern int find_matching_signature(void *mc, unsigned int csig, int cpf);
-
 #ifdef CONFIG_MICROCODE_INTEL
 extern void __init load_ucode_intel_bsp(void);
 extern void load_ucode_intel_ap(void);

diff --git a/arch/x86/kernel/cpu/microcode/Makefile b/arch/x86/kernel/cpu/microcode/Makefile
index 220b1a5..ba12e8a 100644 (file)
--- a/arch/x86/kernel/cpu/microcode/Makefile
+++ b/arch/x86/kernel/cpu/microcode/Makefile
@@ -1,4 +1,4 @@
 microcode-y                            := core.o
 obj-$(CONFIG_MICROCODE)                        += microcode.o
-microcode-$(CONFIG_MICROCODE_INTEL)    += intel.o intel_lib.o
+microcode-$(CONFIG_MICROCODE_INTEL)    += intel.o
 microcode-$(CONFIG_MICROCODE_AMD)      += amd.o

diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index b84288e..5e631d2 100644 (file)
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -61,6 +61,61 @@ static struct ucode_blobs {
        bool valid;
 } blobs;
 
+static inline bool cpu_signatures_match(unsigned int s1, unsigned int p1,
+                                       unsigned int s2, unsigned int p2)
+{
+       if (s1 != s2)
+               return false;
+
+       /* Processor flags are either both 0 ... */
+       if (!p1 && !p2)
+               return true;
+
+       /* ... or they intersect. */
+       return p1 & p2;
+}
+
+/*
+ * Returns 1 if update has been found, 0 otherwise.
+ */
+static int find_matching_signature(void *mc, unsigned int csig, int cpf)
+{
+       struct microcode_header_intel *mc_hdr = mc;
+       struct extended_sigtable *ext_hdr;
+       struct extended_signature *ext_sig;
+       int i;
+
+       if (cpu_signatures_match(csig, cpf, mc_hdr->sig, mc_hdr->pf))
+               return 1;
+
+       /* Look for ext. headers: */
+       if (get_totalsize(mc_hdr) <= get_datasize(mc_hdr) + MC_HEADER_SIZE)
+               return 0;
+
+       ext_hdr = mc + get_datasize(mc_hdr) + MC_HEADER_SIZE;
+       ext_sig = (void *)ext_hdr + EXT_HEADER_SIZE;
+
+       for (i = 0; i < ext_hdr->count; i++) {
+               if (cpu_signatures_match(csig, cpf, ext_sig->sig, ext_sig->pf))
+                       return 1;
+               ext_sig++;
+       }
+       return 0;
+}
+
+/*
+ * Returns 1 if update has been found, 0 otherwise.
+ */
+static int has_newer_microcode(void *mc, unsigned int csig, int cpf, int new_rev)
+{
+       struct microcode_header_intel *mc_hdr = mc;
+
+       if (mc_hdr->rev <= new_rev)
+               return 0;
+
+       return find_matching_signature(mc, csig, cpf);
+}
+
 /* Go through saved patches and find the one suitable for the current CPU. */
 static enum ucode_state
 find_microcode_patch(struct microcode_intel **saved,
@@ -291,6 +346,104 @@ static unsigned int _save_mc(struct microcode_intel **mc_saved,
        return num_saved;
 }
 
+static int microcode_sanity_check(void *mc, int print_err)
+{
+       unsigned long total_size, data_size, ext_table_size;
+       struct microcode_header_intel *mc_header = mc;
+       struct extended_sigtable *ext_header = NULL;
+       u32 sum, orig_sum, ext_sigcount = 0, i;
+       struct extended_signature *ext_sig;
+
+       total_size = get_totalsize(mc_header);
+       data_size = get_datasize(mc_header);
+
+       if (data_size + MC_HEADER_SIZE > total_size) {
+               if (print_err)
+                       pr_err("Error: bad microcode data file size.\n");
+               return -EINVAL;
+       }
+
+       if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
+               if (print_err)
+                       pr_err("Error: invalid/unknown microcode update format.\n");
+               return -EINVAL;
+       }
+
+       ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
+       if (ext_table_size) {
+               u32 ext_table_sum = 0;
+               u32 *ext_tablep;
+
+               if ((ext_table_size < EXT_HEADER_SIZE)
+                || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
+                       if (print_err)
+                               pr_err("Error: truncated extended signature table.\n");
+                       return -EINVAL;
+               }
+
+               ext_header = mc + MC_HEADER_SIZE + data_size;
+               if (ext_table_size != exttable_size(ext_header)) {
+                       if (print_err)
+                               pr_err("Error: extended signature table size mismatch.\n");
+                       return -EFAULT;
+               }
+
+               ext_sigcount = ext_header->count;
+
+               /*
+                * Check extended table checksum: the sum of all dwords that
+                * comprise a valid table must be 0.
+                */
+               ext_tablep = (u32 *)ext_header;
+
+               i = ext_table_size / sizeof(u32);
+               while (i--)
+                       ext_table_sum += ext_tablep[i];
+
+               if (ext_table_sum) {
+                       if (print_err)
+                               pr_warn("Bad extended signature table checksum, aborting.\n");
+                       return -EINVAL;
+               }
+       }
+
+       /*
+        * Calculate the checksum of update data and header. The checksum of
+        * valid update data and header including the extended signature table
+        * must be 0.
+        */
+       orig_sum = 0;
+       i = (MC_HEADER_SIZE + data_size) / sizeof(u32);
+       while (i--)
+               orig_sum += ((u32 *)mc)[i];
+
+       if (orig_sum) {
+               if (print_err)
+                       pr_err("Bad microcode data checksum, aborting.\n");
+               return -EINVAL;
+       }
+
+       if (!ext_table_size)
+               return 0;
+
+       /*
+        * Check extended signature checksum: 0 => valid.
+        */
+       for (i = 0; i < ext_sigcount; i++) {
+               ext_sig = (void *)ext_header + EXT_HEADER_SIZE +
+                         EXT_SIGNATURE_SIZE * i;
+
+               sum = (mc_header->sig + mc_header->pf + mc_header->cksum) -
+                     (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
+               if (sum) {
+                       if (print_err)
+                               pr_err("Bad extended signature checksum, aborting.\n");
+                       return -EINVAL;
+               }
+       }
+       return 0;
+}
+
 /*
  * Get microcode matching with BSP's model. Only CPUs with the same model as
  * BSP can stay in the platform.
@@ -1105,4 +1258,3 @@ struct microcode_ops * __init init_intel_microcode(void)
 
        return &microcode_intel_ops;
 }
-

diff --git a/arch/x86/kernel/cpu/microcode/intel_lib.c b/arch/x86/kernel/cpu/microcode/intel_lib.c
deleted file mode 100644 (file)
index 406cb6c..0000000
--- a/arch/x86/kernel/cpu/microcode/intel_lib.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- *     Intel CPU Microcode Update Driver for Linux
- *
- *     Copyright (C) 2012 Fenghua Yu <fenghua.yu@intel.com>
- *                        H Peter Anvin" <hpa@zytor.com>
- *
- *     This driver allows to upgrade microcode on Intel processors
- *     belonging to IA-32 family - PentiumPro, Pentium II,
- *     Pentium III, Xeon, Pentium 4, etc.
- *
- *     Reference: Section 8.11 of Volume 3a, IA-32 Intel? Architecture
- *     Software Developer's Manual
- *     Order Number 253668 or free download from:
- *
- *     http://developer.intel.com/Assets/PDF/manual/253668.pdf
- *
- *     For more information, go to http://www.urbanmyth.org/microcode
- *
- *     This program is free software; you can redistribute it and/or
- *     modify it under the terms of the GNU General Public License
- *     as published by the Free Software Foundation; either version
- *     2 of the License, or (at your option) any later version.
- *
- */
-#include <linux/firmware.h>
-#include <linux/uaccess.h>
-#include <linux/kernel.h>
-
-#include <asm/microcode_intel.h>
-#include <asm/processor.h>
-#include <asm/msr.h>
-
-static inline bool cpu_signatures_match(unsigned int s1, unsigned int p1,
-                                       unsigned int s2, unsigned int p2)
-{
-       if (s1 != s2)
-               return false;
-
-       /* Processor flags are either both 0 ... */
-       if (!p1 && !p2)
-               return true;
-
-       /* ... or they intersect. */
-       return p1 & p2;
-}
-
-int microcode_sanity_check(void *mc, int print_err)
-{
-       unsigned long total_size, data_size, ext_table_size;
-       struct microcode_header_intel *mc_header = mc;
-       struct extended_sigtable *ext_header = NULL;
-       u32 sum, orig_sum, ext_sigcount = 0, i;
-       struct extended_signature *ext_sig;
-
-       total_size = get_totalsize(mc_header);
-       data_size = get_datasize(mc_header);
-
-       if (data_size + MC_HEADER_SIZE > total_size) {
-               if (print_err)
-                       pr_err("Error: bad microcode data file size.\n");
-               return -EINVAL;
-       }
-
-       if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
-               if (print_err)
-                       pr_err("Error: invalid/unknown microcode update format.\n");
-               return -EINVAL;
-       }
-
-       ext_table_size = total_size - (MC_HEADER_SIZE + data_size);
-       if (ext_table_size) {
-               u32 ext_table_sum = 0;
-               u32 *ext_tablep;
-
-               if ((ext_table_size < EXT_HEADER_SIZE)
-                || ((ext_table_size - EXT_HEADER_SIZE) % EXT_SIGNATURE_SIZE)) {
-                       if (print_err)
-                               pr_err("Error: truncated extended signature table.\n");
-                       return -EINVAL;
-               }
-
-               ext_header = mc + MC_HEADER_SIZE + data_size;
-               if (ext_table_size != exttable_size(ext_header)) {
-                       if (print_err)
-                               pr_err("Error: extended signature table size mismatch.\n");
-                       return -EFAULT;
-               }
-
-               ext_sigcount = ext_header->count;
-
-               /*
-                * Check extended table checksum: the sum of all dwords that
-                * comprise a valid table must be 0.
-                */
-               ext_tablep = (u32 *)ext_header;
-
-               i = ext_table_size / sizeof(u32);
-               while (i--)
-                       ext_table_sum += ext_tablep[i];
-
-               if (ext_table_sum) {
-                       if (print_err)
-                               pr_warn("Bad extended signature table checksum, aborting.\n");
-                       return -EINVAL;
-               }
-       }
-
-       /*
-        * Calculate the checksum of update data and header. The checksum of
-        * valid update data and header including the extended signature table
-        * must be 0.
-        */
-       orig_sum = 0;
-       i = (MC_HEADER_SIZE + data_size) / sizeof(u32);
-       while (i--)
-               orig_sum += ((u32 *)mc)[i];
-
-       if (orig_sum) {
-               if (print_err)
-                       pr_err("Bad microcode data checksum, aborting.\n");
-               return -EINVAL;
-       }
-
-       if (!ext_table_size)
-               return 0;
-
-       /*
-        * Check extended signature checksum: 0 => valid.
-        */
-       for (i = 0; i < ext_sigcount; i++) {
-               ext_sig = (void *)ext_header + EXT_HEADER_SIZE +
-                         EXT_SIGNATURE_SIZE * i;
-
-               sum = (mc_header->sig + mc_header->pf + mc_header->cksum) -
-                     (ext_sig->sig + ext_sig->pf + ext_sig->cksum);
-               if (sum) {
-                       if (print_err)
-                               pr_err("Bad extended signature checksum, aborting.\n");
-                       return -EINVAL;
-               }
-       }
-       return 0;
-}
-
-/*
- * Returns 1 if update has been found, 0 otherwise.
- */
-int find_matching_signature(void *mc, unsigned int csig, int cpf)
-{
-       struct microcode_header_intel *mc_hdr = mc;
-       struct extended_sigtable *ext_hdr;
-       struct extended_signature *ext_sig;
-       int i;
-
-       if (cpu_signatures_match(csig, cpf, mc_hdr->sig, mc_hdr->pf))
-               return 1;
-
-       /* Look for ext. headers: */
-       if (get_totalsize(mc_hdr) <= get_datasize(mc_hdr) + MC_HEADER_SIZE)
-               return 0;
-
-       ext_hdr = mc + get_datasize(mc_hdr) + MC_HEADER_SIZE;
-       ext_sig = (void *)ext_hdr + EXT_HEADER_SIZE;
-
-       for (i = 0; i < ext_hdr->count; i++) {
-               if (cpu_signatures_match(csig, cpf, ext_sig->sig, ext_sig->pf))
-                       return 1;
-               ext_sig++;
-       }
-       return 0;
-}
-
-/*
- * Returns 1 if update has been found, 0 otherwise.
- */
-int has_newer_microcode(void *mc, unsigned int csig, int cpf, int new_rev)
-{
-       struct microcode_header_intel *mc_hdr = mc;
-
-       if (mc_hdr->rev <= new_rev)
-               return 0;
-
-       return find_matching_signature(mc, csig, cpf);
-}