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[PATCH 00/12] x86/microcode: Rework microcode loading

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  [PATCH 00/12] x86/microcode: Rework microcode loading Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
    [PATCH 07/12] x86/microcode: Issue the debug printk on resume only on success Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
      [tip:x86/microcode] x86/microcode: Issue the debug printk on resume  only on success tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-10-25 18:40 +0200
    [PATCH 01/12] x86/microcode: Run the AP-loading routine only on the application processors Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
      [tip:x86/microcode] x86/microcode: Run the AP-loading routine only  on the application processors tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-10-25 18:30 +0200
    [PATCH 09/12] x86/microcode/AMD: Retract functions Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
      [tip:x86/microcode] x86/microcode/amd: Move private inlines to .c  and mark local functions static tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-10-25 18:40 +0200
    [PATCH 08/12] x86/microcode: Collect CPU info on resume Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
      [tip:x86/microcode] x86/microcode: Collect CPU info on resume tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-10-25 18:40 +0200
    [PATCH 10/12] x86/microcode/intel: Remove intel_lib.c Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
      [tip:x86/microcode] x86/microcode/intel: Remove intel_lib.c tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-10-25 18:40 +0200
    [PATCH 06/12] x86/microcode/AMD: Hand down the CPU family Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
      [tip:x86/microcode] x86/microcode/amd: Hand down the CPU family tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-10-25 18:40 +0200
    [PATCH 02/12] x86/microcode: Move driver authors to CREDITS Borislav Petkov <bp@alien8.de> - 2016-10-25 12:00 +0200
      [tip:x86/microcode] x86/microcode: Move driver authors to CREDITS tip-bot for Borislav Petkov <tipbot@zytor.com> - 2016-10-25 18:40 +0200

#1508140 — [PATCH 00/12] x86/microcode: Rework microcode loading

From: Borislav Petkov <bp@suse.de>

So this is something I've been meaning to do for a while now: cleanup
the Intel side of the microcode loader. But who has time?

Luckily (or not), CONFIG_RANDOMIZE_MEMORY came about and broke the
loader just enough so that I can finally force myself to go and clean it
all up, make it more robust.

So this is my attempt at it, the meat of the whole change is patch 11.
Which is unreadable as a diff to almost everyone, except to me, maybe :)
But it is the only way I could think of to do this without breaking the
driver knowingly. Oh, and staring at the code after the patch applied
makes it much clearer and nicer again anyway.

This pile has been tested on both AMD and Intel boxes of different
garden variety, with suspend to disk and to RAM and 32-bit and 64-bit.

Comments, suggestions and eventual pickup are appreciated :)

Thanks.

Borislav Petkov (12):
  x86/microcode: Run the AP-loading routine only on the application
    processors
  x86/microcode: Move driver authors to CREDITS
  x86/microcode/intel: Simplify generic_load_microcode()
  x86/microcode: Remove one ifdef clause
  x86/microcode: Export the microcode cache linked list
  x86/microcode/AMD: Hand down the CPU family
  x86/microcode: Issue the debug printk on resume only on success
  x86/microcode: Collect CPU info on resume
  x86/microcode/AMD: Retract functions
  x86/microcode/intel: Remove intel_lib.c
  x86/microcode: Rework microcode loading
  x86/microcode: Bump driver version, update copyrights

 CREDITS                                   |   4 +
 arch/x86/include/asm/microcode.h          |  18 +-
 arch/x86/include/asm/microcode_amd.h      |  30 +-
 arch/x86/include/asm/microcode_intel.h    |   4 -
 arch/x86/kernel/cpu/common.c              |   7 +-
 arch/x86/kernel/cpu/microcode/Makefile    |   2 +-
 arch/x86/kernel/cpu/microcode/amd.c       | 421 ++++++++-------
 arch/x86/kernel/cpu/microcode/core.c      |  83 ++-
 arch/x86/kernel/cpu/microcode/intel.c     | 834 +++++++++++++-----------------
 arch/x86/kernel/cpu/microcode/intel_lib.c | 184 -------
 10 files changed, 647 insertions(+), 940 deletions(-)
 delete mode 100644 arch/x86/kernel/cpu/microcode/intel_lib.c

-- 
2.10.0

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#1508141 — [PATCH 07/12] x86/microcode: Issue the debug printk on resume only on success

From: Borislav Petkov <bp@suse.de>

Move it after the patch application function which also checks whether
we were successful.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/cpu/microcode/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index b67145dcfdaf..a18ff7547fa9 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -460,11 +460,11 @@ static void microcode_fini_cpu(int cpu)
 
 static enum ucode_state microcode_resume_cpu(int cpu)
 {
-	pr_debug("CPU%d updated upon resume\n", cpu);
-
 	if (apply_microcode_on_target(cpu))
 		return UCODE_ERROR;
 
+	pr_debug("CPU%d updated upon resume\n", cpu);
+
 	return UCODE_OK;
 }
 
-- 
2.10.0

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#1508441 — [tip:x86/microcode] x86/microcode: Issue the debug printk on resume only on success

Commit-ID:  6b14b81899a2e1e5dd0d089f2a41a6118929658d
Gitweb:     http://git.kernel.org/tip/6b14b81899a2e1e5dd0d089f2a41a6118929658d
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 25 Oct 2016 11:55:17 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 25 Oct 2016 12:28:58 +0200

x86/microcode: Issue the debug printk on resume only on success

Move it after the patch application function which also checks whether
we were successful.

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/20161025095522.11964-8-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/microcode/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index b67145d..a18ff75 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -460,11 +460,11 @@ static void microcode_fini_cpu(int cpu)
 
 static enum ucode_state microcode_resume_cpu(int cpu)
 {
-	pr_debug("CPU%d updated upon resume\n", cpu);
-
 	if (apply_microcode_on_target(cpu))
 		return UCODE_ERROR;
 
+	pr_debug("CPU%d updated upon resume\n", cpu);
+
 	return UCODE_OK;
 }
 

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#1508142 — [PATCH 01/12] x86/microcode: Run the AP-loading routine only on the application processors

From: Borislav Petkov <bp@suse.de>

cpu_init() is run also on the BSP (in addition to the APs):

x86_64_start_kernel
|-> x86_64_start_reservations
|-> start_kernel
|-> trap_init
|-> cpu_init
|-> load_ucode_ap
...

but we run the AP (Application Processors) microcode loading routine
there too even though we have a BSP-specific routine for that:
load_ucode_bsp().

Which is unnecessary. So let's limit the AP microcode loading routine to
the APs only.

Remove a useless comment while at it.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/cpu/common.c        | 7 ++-----
 arch/x86/kernel/cpu/microcode/amd.c | 5 -----
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 9bd910a7dd0a..1a1d668263b9 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1462,11 +1462,8 @@ void cpu_init(void)
 	 */
 	cr4_init_shadow();
 
-	/*
-	 * Load microcode on this cpu if a valid microcode is available.
-	 * This is early microcode loading procedure.
-	 */
-	load_ucode_ap();
+	if (cpu)
+		load_ucode_ap();
 
 	t = &per_cpu(cpu_tss, cpu);
 	oist = &per_cpu(orig_ist, cpu);
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 620ab06bcf45..6b3929e80fd4 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -357,17 +357,12 @@ static void __init get_bsp_sig(void)
 #else
 void load_ucode_amd_ap(void)
 {
-	unsigned int cpu = smp_processor_id();
 	struct equiv_cpu_entry *eq;
 	struct microcode_amd *mc;
 	u8 *cont = container;
 	u32 rev, eax;
 	u16 eq_id;
 
-	/* Exit if called on the BSP. */
-	if (!cpu)
-		return;
-
 	if (!container)
 		return;
 
-- 
2.10.0

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#1508430 — [tip:x86/microcode] x86/microcode: Run the AP-loading routine only on the application processors

Commit-ID:  777284b66f2326c7cb4c541e2224b638b562a9d3
Gitweb:     http://git.kernel.org/tip/777284b66f2326c7cb4c541e2224b638b562a9d3
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 25 Oct 2016 11:55:11 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 25 Oct 2016 12:28:57 +0200

x86/microcode: Run the AP-loading routine only on the application processors

cpu_init() is run also on the BSP (in addition to the APs):

 x86_64_start_kernel
 |-> x86_64_start_reservations
 |-> start_kernel
 |-> trap_init
 |-> cpu_init
 |-> load_ucode_ap
 ...

but we run the AP (Application Processors) microcode loading routine
there too even though we have a BSP-specific routine for that:
load_ucode_bsp().

Which is unnecessary. So let's limit the AP microcode loading routine to
the APs only.

Remove a useless comment while at it.

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/20161025095522.11964-2-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/common.c        | 7 ++-----
 arch/x86/kernel/cpu/microcode/amd.c | 5 -----
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 9bd910a..1a1d668 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1462,11 +1462,8 @@ void cpu_init(void)
 	 */
 	cr4_init_shadow();
 
-	/*
-	 * Load microcode on this cpu if a valid microcode is available.
-	 * This is early microcode loading procedure.
-	 */
-	load_ucode_ap();
+	if (cpu)
+		load_ucode_ap();
 
 	t = &per_cpu(cpu_tss, cpu);
 	oist = &per_cpu(orig_ist, cpu);
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 620ab06..6b3929e 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -357,17 +357,12 @@ static void __init get_bsp_sig(void)
 #else
 void load_ucode_amd_ap(void)
 {
-	unsigned int cpu = smp_processor_id();
 	struct equiv_cpu_entry *eq;
 	struct microcode_amd *mc;
 	u8 *cont = container;
 	u32 rev, eax;
 	u16 eq_id;
 
-	/* Exit if called on the BSP. */
-	if (!cpu)
-		return;
-
 	if (!container)
 		return;
 

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#1508144 — [PATCH 09/12] x86/microcode/AMD: Retract functions

From: Borislav Petkov <bp@suse.de>

Make them all static as they're used in a single file now.

No functionality change.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/include/asm/microcode_amd.h | 21 --------------
 arch/x86/kernel/cpu/microcode/amd.c  | 53 +++++++++++++++++++++++++-----------
 2 files changed, 37 insertions(+), 37 deletions(-)

diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
index ad6a7be3b1f8..3e3e20be829a 100644
--- a/arch/x86/include/asm/microcode_amd.h
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -40,27 +40,6 @@ struct microcode_amd {
 	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, u8 family, const u8 *data, size_t size);
-
 #define PATCH_MAX_SIZE PAGE_SIZE
 
 #ifdef CONFIG_MICROCODE_AMD
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index bb16418ecaa9..03c19a68d61f 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -126,6 +126,37 @@ static size_t compute_container_size(u8 *data, u32 total_size)
 	return size;
 }
 
+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;
+}
+
+static int __apply_microcode_amd(struct microcode_amd *mc_amd)
+{
+	u32 rev, dummy;
+
+	native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
+
+	/* verify patch application was successful */
+	native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
+	if (rev != mc_amd->hdr.patch_id)
+		return -1;
+
+	return 0;
+}
+
 /*
  * Early load occurs before we can vmalloc(). So we look for the microcode
  * patch container file in initrd, traverse equivalent cpu table, look for a
@@ -395,6 +426,9 @@ void load_ucode_amd_ap(unsigned int family)
 }
 #endif
 
+static enum ucode_state
+load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size);
+
 int __init save_microcode_in_initrd_amd(unsigned int family)
 {
 	unsigned long cont;
@@ -649,21 +683,7 @@ bool check_current_patch_level(u32 *rev, bool early)
 	return ret;
 }
 
-int __apply_microcode_amd(struct microcode_amd *mc_amd)
-{
-	u32 rev, dummy;
-
-	native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
-
-	/* verify patch application was successful */
-	native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
-	if (rev != mc_amd->hdr.patch_id)
-		return -1;
-
-	return 0;
-}
-
-int apply_microcode_amd(int cpu)
+static int apply_microcode_amd(int cpu)
 {
 	struct cpuinfo_x86 *c = &cpu_data(cpu);
 	struct microcode_amd *mc_amd;
@@ -846,7 +866,8 @@ static enum ucode_state __load_microcode_amd(u8 family, const u8 *data,
 	return UCODE_OK;
 }
 
-enum ucode_state load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size)
+static enum ucode_state
+load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size)
 {
 	enum ucode_state ret;
 
-- 
2.10.0

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#1508447 — [tip:x86/microcode] x86/microcode/amd: Move private inlines to .c and mark local functions static

Commit-ID:  76bd11c23aaa5c4bed504bfc4cf690240759598d
Gitweb:     http://git.kernel.org/tip/76bd11c23aaa5c4bed504bfc4cf690240759598d
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 25 Oct 2016 11:55:19 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 25 Oct 2016 12:28:59 +0200

x86/microcode/amd: Move private inlines to .c and mark local functions static

Make them all static as they're used in a single file now.

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/20161025095522.11964-10-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/include/asm/microcode_amd.h | 21 --------------
 arch/x86/kernel/cpu/microcode/amd.c  | 53 +++++++++++++++++++++++++-----------
 2 files changed, 37 insertions(+), 37 deletions(-)

diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
index ad6a7be..3e3e20b 100644
--- a/arch/x86/include/asm/microcode_amd.h
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -40,27 +40,6 @@ struct microcode_amd {
 	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, u8 family, const u8 *data, size_t size);
-
 #define PATCH_MAX_SIZE PAGE_SIZE
 
 #ifdef CONFIG_MICROCODE_AMD
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index bb16418..03c19a6 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -126,6 +126,37 @@ static size_t compute_container_size(u8 *data, u32 total_size)
 	return size;
 }
 
+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;
+}
+
+static int __apply_microcode_amd(struct microcode_amd *mc_amd)
+{
+	u32 rev, dummy;
+
+	native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
+
+	/* verify patch application was successful */
+	native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
+	if (rev != mc_amd->hdr.patch_id)
+		return -1;
+
+	return 0;
+}
+
 /*
  * Early load occurs before we can vmalloc(). So we look for the microcode
  * patch container file in initrd, traverse equivalent cpu table, look for a
@@ -395,6 +426,9 @@ void load_ucode_amd_ap(unsigned int family)
 }
 #endif
 
+static enum ucode_state
+load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size);
+
 int __init save_microcode_in_initrd_amd(unsigned int family)
 {
 	unsigned long cont;
@@ -649,21 +683,7 @@ bool check_current_patch_level(u32 *rev, bool early)
 	return ret;
 }
 
-int __apply_microcode_amd(struct microcode_amd *mc_amd)
-{
-	u32 rev, dummy;
-
-	native_wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
-
-	/* verify patch application was successful */
-	native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
-	if (rev != mc_amd->hdr.patch_id)
-		return -1;
-
-	return 0;
-}
-
-int apply_microcode_amd(int cpu)
+static int apply_microcode_amd(int cpu)
 {
 	struct cpuinfo_x86 *c = &cpu_data(cpu);
 	struct microcode_amd *mc_amd;
@@ -846,7 +866,8 @@ static enum ucode_state __load_microcode_amd(u8 family, const u8 *data,
 	return UCODE_OK;
 }
 
-enum ucode_state load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size)
+static enum ucode_state
+load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size)
 {
 	enum ucode_state ret;
 

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#1508146 — [PATCH 08/12] x86/microcode: Collect CPU info on resume

From: Borislav Petkov <bp@suse.de>

We need to reread the CPU's microcode revision after resume because
applied microcode gets "forgotten" depending on the sleep state.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/cpu/microcode/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index a18ff7547fa9..f737039d59b2 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -498,6 +498,9 @@ static enum ucode_state microcode_update_cpu(int cpu)
 {
 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
 
+	/* Refresh CPU microcode revision after resume. */
+	collect_cpu_info(cpu);
+
 	if (uci->valid)
 		return microcode_resume_cpu(cpu);
 
-- 
2.10.0

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#1508435 — [tip:x86/microcode] x86/microcode: Collect CPU info on resume

Commit-ID:  7f709d0c322203e37581f6b7c91f88b4fdeca5a0
Gitweb:     http://git.kernel.org/tip/7f709d0c322203e37581f6b7c91f88b4fdeca5a0
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 25 Oct 2016 11:55:18 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 25 Oct 2016 12:28:58 +0200

x86/microcode: Collect CPU info on resume

We need to reread the CPU's microcode revision after resume because
applied microcode gets "forgotten" depending on the sleep state.

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/20161025095522.11964-9-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/microcode/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index a18ff75..f737039 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -498,6 +498,9 @@ static enum ucode_state microcode_update_cpu(int cpu)
 {
 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
 
+	/* Refresh CPU microcode revision after resume. */
+	collect_cpu_info(cpu);
+
 	if (uci->valid)
 		return microcode_resume_cpu(cpu);
 

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#1508148 — [PATCH 10/12] x86/microcode/intel: Remove intel_lib.c

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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#1508446 — [tip:x86/microcode] x86/microcode/intel: Remove intel_lib.c

Commit-ID:  8027923ab4df9b2bdb9d642b7dceeb135c032f5e
Gitweb:     http://git.kernel.org/tip/8027923ab4df9b2bdb9d642b7dceeb135c032f5e
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 25 Oct 2016 11:55:20 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 25 Oct 2016 12:28:59 +0200

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>
---
 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(-)

diff --git a/arch/x86/include/asm/microcode_intel.h b/arch/x86/include/asm/microcode_intel.h
index 5e69154..195becc 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 220b1a5..ba12e8a 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 b84288e..5e631d2 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 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);
-}

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#1508149 — [PATCH 06/12] x86/microcode/AMD: Hand down the CPU family

From: Borislav Petkov <bp@suse.de>

Will be needed in a following patch.

No functionality change.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/include/asm/microcode_amd.h | 9 +++++----
 arch/x86/kernel/cpu/microcode/amd.c  | 6 +++---
 arch/x86/kernel/cpu/microcode/core.c | 4 ++--
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
index 15eb75484cc0..ad6a7be3b1f8 100644
--- a/arch/x86/include/asm/microcode_amd.h
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -65,13 +65,14 @@ extern enum ucode_state load_microcode_amd(int cpu, u8 family, const u8 *data, s
 
 #ifdef CONFIG_MICROCODE_AMD
 extern void __init load_ucode_amd_bsp(unsigned int family);
-extern void load_ucode_amd_ap(void);
-extern int __init save_microcode_in_initrd_amd(void);
+extern void load_ucode_amd_ap(unsigned int family);
+extern int __init save_microcode_in_initrd_amd(unsigned int family);
 void reload_ucode_amd(void);
 #else
 static inline void __init load_ucode_amd_bsp(unsigned int family) {}
-static inline void load_ucode_amd_ap(void) {}
-static inline int __init save_microcode_in_initrd_amd(void) { return -EINVAL; }
+static inline void load_ucode_amd_ap(unsigned int family) {}
+static inline int __init
+save_microcode_in_initrd_amd(unsigned int family) { return -EINVAL; }
 void reload_ucode_amd(void) {}
 #endif
 
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 8cb20e3e9436..bb16418ecaa9 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -308,7 +308,7 @@ void __init load_ucode_amd_bsp(unsigned int family)
  * In save_microcode_in_initrd_amd() BSP's patch is copied to amd_ucode_patch,
  * which is used upon resume from suspend.
  */
-void load_ucode_amd_ap(void)
+void load_ucode_amd_ap(unsigned int family)
 {
 	struct microcode_amd *mc;
 	size_t *usize;
@@ -346,7 +346,7 @@ static void __init get_bsp_sig(void)
 		smp_call_function_single(bsp, collect_cpu_sig_on_bsp, NULL, 1);
 }
 #else
-void load_ucode_amd_ap(void)
+void load_ucode_amd_ap(unsigned int family)
 {
 	struct equiv_cpu_entry *eq;
 	struct microcode_amd *mc;
@@ -395,7 +395,7 @@ void load_ucode_amd_ap(void)
 }
 #endif
 
-int __init save_microcode_in_initrd_amd(void)
+int __init save_microcode_in_initrd_amd(unsigned int family)
 {
 	unsigned long cont;
 	int retval = 0;
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 55a2b24b2bdd..b67145dcfdaf 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -169,7 +169,7 @@ void load_ucode_ap(void)
 		break;
 	case X86_VENDOR_AMD:
 		if (family >= 0x10)
-			load_ucode_amd_ap();
+			load_ucode_amd_ap(family);
 		break;
 	default:
 		break;
@@ -187,7 +187,7 @@ static int __init save_microcode_in_initrd(void)
 		break;
 	case X86_VENDOR_AMD:
 		if (c->x86 >= 0x10)
-			return save_microcode_in_initrd_amd();
+			return save_microcode_in_initrd_amd(c->x86);
 		break;
 	default:
 		break;
-- 
2.10.0

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#1508434 — [tip:x86/microcode] x86/microcode/amd: Hand down the CPU family

Commit-ID:  b3763a672dc0cdaf494a28ec4c2b4e5e0e93334e
Gitweb:     http://git.kernel.org/tip/b3763a672dc0cdaf494a28ec4c2b4e5e0e93334e
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 25 Oct 2016 11:55:16 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 25 Oct 2016 12:28:58 +0200

x86/microcode/amd: Hand down the CPU family

Will be needed in a following patch.

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/20161025095522.11964-7-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/include/asm/microcode_amd.h | 9 +++++----
 arch/x86/kernel/cpu/microcode/amd.c  | 6 +++---
 arch/x86/kernel/cpu/microcode/core.c | 4 ++--
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
index 15eb754..ad6a7be 100644
--- a/arch/x86/include/asm/microcode_amd.h
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -65,13 +65,14 @@ extern enum ucode_state load_microcode_amd(int cpu, u8 family, const u8 *data, s
 
 #ifdef CONFIG_MICROCODE_AMD
 extern void __init load_ucode_amd_bsp(unsigned int family);
-extern void load_ucode_amd_ap(void);
-extern int __init save_microcode_in_initrd_amd(void);
+extern void load_ucode_amd_ap(unsigned int family);
+extern int __init save_microcode_in_initrd_amd(unsigned int family);
 void reload_ucode_amd(void);
 #else
 static inline void __init load_ucode_amd_bsp(unsigned int family) {}
-static inline void load_ucode_amd_ap(void) {}
-static inline int __init save_microcode_in_initrd_amd(void) { return -EINVAL; }
+static inline void load_ucode_amd_ap(unsigned int family) {}
+static inline int __init
+save_microcode_in_initrd_amd(unsigned int family) { return -EINVAL; }
 void reload_ucode_amd(void) {}
 #endif
 
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 8cb20e3..bb16418 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -308,7 +308,7 @@ void __init load_ucode_amd_bsp(unsigned int family)
  * In save_microcode_in_initrd_amd() BSP's patch is copied to amd_ucode_patch,
  * which is used upon resume from suspend.
  */
-void load_ucode_amd_ap(void)
+void load_ucode_amd_ap(unsigned int family)
 {
 	struct microcode_amd *mc;
 	size_t *usize;
@@ -346,7 +346,7 @@ static void __init get_bsp_sig(void)
 		smp_call_function_single(bsp, collect_cpu_sig_on_bsp, NULL, 1);
 }
 #else
-void load_ucode_amd_ap(void)
+void load_ucode_amd_ap(unsigned int family)
 {
 	struct equiv_cpu_entry *eq;
 	struct microcode_amd *mc;
@@ -395,7 +395,7 @@ void load_ucode_amd_ap(void)
 }
 #endif
 
-int __init save_microcode_in_initrd_amd(void)
+int __init save_microcode_in_initrd_amd(unsigned int family)
 {
 	unsigned long cont;
 	int retval = 0;
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 55a2b24..b67145d 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -169,7 +169,7 @@ void load_ucode_ap(void)
 		break;
 	case X86_VENDOR_AMD:
 		if (family >= 0x10)
-			load_ucode_amd_ap();
+			load_ucode_amd_ap(family);
 		break;
 	default:
 		break;
@@ -187,7 +187,7 @@ static int __init save_microcode_in_initrd(void)
 		break;
 	case X86_VENDOR_AMD:
 		if (c->x86 >= 0x10)
-			return save_microcode_in_initrd_amd();
+			return save_microcode_in_initrd_amd(c->x86);
 		break;
 	default:
 		break;

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#1508150 — [PATCH 02/12] x86/microcode: Move driver authors to CREDITS

From: Borislav Petkov <bp@suse.de>

They're not active anymore.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 CREDITS                              | 4 ++++
 arch/x86/kernel/cpu/microcode/core.c | 3 +--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/CREDITS b/CREDITS
index 513aaa3546bf..e69077c258eb 100644
--- a/CREDITS
+++ b/CREDITS
@@ -2774,6 +2774,10 @@ S: C/ Mieses 20, 9-B
 S: Valladolid 47009
 S: Spain
 
+N: Peter Oruba
+D: AMD Microcode loader driver
+S: Germany
+
 N: Jens Osterkamp
 E: jens@de.ibm.com
 D: Maintainer of Spidernet network driver for Cell
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 5ce5155f0695..d0d1a0f5a497 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -649,8 +649,7 @@ int __init microcode_init(void)
 	cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/microcode:online",
 				  mc_cpu_online, mc_cpu_down_prep);
 
-	pr_info("Microcode Update Driver: v" MICROCODE_VERSION
-		" <tigran@aivazian.fsnet.co.uk>, Peter Oruba\n");
+	pr_info("Microcode Update Driver: v%s.", MICROCODE_VERSION);
 
 	return 0;
 
-- 
2.10.0

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#1508443 — [tip:x86/microcode] x86/microcode: Move driver authors to CREDITS

Commit-ID:  5879a267520898d595e9cbcae0aad4739c822146
Gitweb:     http://git.kernel.org/tip/5879a267520898d595e9cbcae0aad4739c822146
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Tue, 25 Oct 2016 11:55:12 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 25 Oct 2016 12:28:57 +0200

x86/microcode: Move driver authors to CREDITS

They're not active anymore.

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/20161025095522.11964-3-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 CREDITS                              | 4 ++++
 arch/x86/kernel/cpu/microcode/core.c | 3 +--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/CREDITS b/CREDITS
index 513aaa3..e69077c 100644
--- a/CREDITS
+++ b/CREDITS
@@ -2774,6 +2774,10 @@ S: C/ Mieses 20, 9-B
 S: Valladolid 47009
 S: Spain
 
+N: Peter Oruba
+D: AMD Microcode loader driver
+S: Germany
+
 N: Jens Osterkamp
 E: jens@de.ibm.com
 D: Maintainer of Spidernet network driver for Cell
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 5ce5155..d0d1a0f 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -649,8 +649,7 @@ int __init microcode_init(void)
 	cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "x86/microcode:online",
 				  mc_cpu_online, mc_cpu_down_prep);
 
-	pr_info("Microcode Update Driver: v" MICROCODE_VERSION
-		" <tigran@aivazian.fsnet.co.uk>, Peter Oruba\n");
+	pr_info("Microcode Update Driver: v%s.", MICROCODE_VERSION);
 
 	return 0;
 

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