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Subject[PATCH 10/12] x86/microcode/intel: Remove intel_lib.c
Date
From: Borislav Petkov <bp@suse.de>

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>
---
arch/x86/include/asm/microcode_intel.h | 4 -
arch/x86/kernel/cpu/microcode/Makefile | 2 +-
arch/x86/kernel/cpu/microcode/intel.c | 154 ++++++++++++++++++++++++-
arch/x86/kernel/cpu/microcode/intel_lib.c | 184 ------------------------------
4 files changed, 154 insertions(+), 190 deletions(-)
delete mode 100644 arch/x86/kernel/cpu/microcode/intel_lib.c

diff --git a/arch/x86/include/asm/microcode_intel.h b/arch/x86/include/asm/microcode_intel.h
index 5e69154c9f07..195becc6f780 100644
--- 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 220b1a508513..ba12e8aa4a45 100644
--- 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 b84288e08098..5e631d2cf37f 100644
--- 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
index 406cb6c0d9dd..000000000000
--- 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);
-}
--
2.10.0
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