linux-kernel - Re: [tip:x86/microcode] x86, microcode, amd: Early microcode patch loading support for AMD

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Date:	Fri, 31 May 2013 01:59:55 -0500
From:	Jacob Shin <jacob.shin@....com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Yu, Fenghua" <fenghua.yu@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:x86/microcode] x86, microcode, amd: Early microcode patch
 loading support for AMD

On Thu, May 30, 2013 at 11:10:23PM -0700, Yinghai Lu wrote:
> On Thu, May 30, 2013 at 8:31 PM, tip-bot for Jacob Shin
> <tipbot@...or.com> wrote:
> > Commit-ID:  757885e94a22bcc82beb9b1445c95218cb20ceab
> > Gitweb:     http://git.kernel.org/tip/757885e94a22bcc82beb9b1445c95218cb20ceab
> > Author:     Jacob Shin <jacob.shin@....com>
> > AuthorDate: Thu, 30 May 2013 14:09:19 -0500
> > Committer:  H. Peter Anvin <hpa@...ux.intel.com>
> > CommitDate: Thu, 30 May 2013 20:19:25 -0700
> >
> > x86, microcode, amd: Early microcode patch loading support for AMD
> >
> > Add early microcode patch loading support for AMD.
> >
> > Signed-off-by: Jacob Shin <jacob.shin@....com>
> > Link: http://lkml.kernel.org/r/1369940959-2077-5-git-send-email-jacob.shin@amd.com
> > Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
> > Cc: Fenghua Yu <fenghua.yu@...el.com>
> > ---
> >  Documentation/x86/early-microcode.txt  |  11 +-
> >  arch/x86/Kconfig                       |  14 ++-
> >  arch/x86/include/asm/microcode_amd.h   |  14 +++
> >  arch/x86/kernel/Makefile               |   1 +
> >  arch/x86/kernel/microcode_amd.c        |  22 ++++
> >  arch/x86/kernel/microcode_amd_early.c  | 222 +++++++++++++++++++++++++++++++++
> >  arch/x86/kernel/microcode_core_early.c |  43 ++++++-
> >  7 files changed, 310 insertions(+), 17 deletions(-)
> >
> 
> WARNING: arch/x86/kernel/built-in.o(.cpuinit.text+0x7115): Section
> mismatch in reference from the function load_ucode_amd_ap() to the
> function .init.text:find_ucode_in_initrd()
> The function __cpuinit load_ucode_amd_ap() references
> a function __init find_ucode_in_initrd().
> If find_ucode_in_initrd is only used by load_ucode_amd_ap then
> annotate find_ucode_in_initrd with a matching annotation.

Sorry about that, should have turned on CONFIG_DEBUG_SECTION_MISMATCH=y

This should fix the warnings:

>From 5c7ec96f218f08db25e449d7d5789ee2f66f2f92 Mon Sep 17 00:00:00 2001
From: Jacob Shin <jacob.shin@....com>
Date: Fri, 31 May 2013 01:53:24 -0500
Subject: [PATCH 1/1] x86/microcode/amd: fix section mismatch warnings on
 microcode_amd_early.c

Fix section mismatch warnings on microcode_amd_early.c

Signed-off-by: Jacob Shin <jacob.shin@....com>
---
 arch/x86/include/asm/microcode_amd.h  |    2 +-
 arch/x86/kernel/microcode_amd_early.c |    8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h
index 24254aa..c6b043f 100644
--- a/arch/x86/include/asm/microcode_amd.h
+++ b/arch/x86/include/asm/microcode_amd.h
@@ -64,7 +64,7 @@ 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 __cpuinitdata amd_bsp_mpb[MPB_MAX_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);
diff --git a/arch/x86/kernel/microcode_amd_early.c b/arch/x86/kernel/microcode_amd_early.c
index 7e54d97..9618805 100644
--- a/arch/x86/kernel/microcode_amd_early.c
+++ b/arch/x86/kernel/microcode_amd_early.c
@@ -21,9 +21,9 @@ static u32 ucode_new_rev;
  * Microcode patch container file is prepended to the initrd in cpio format.
  * See Documentation/x86/early-microcode.txt
  */
-static __initdata char ucode_path[] = "kernel/x86/microcode/AuthenticAMD.bin";
+static __cpuinitdata char ucode_path[] = "kernel/x86/microcode/AuthenticAMD.bin";
 
-static struct cpio_data __init find_ucode_in_initrd(void)
+static struct cpio_data __cpuinit find_ucode_in_initrd(void)
 {
 	long offset = 0;
 	struct cpio_data cd;
@@ -62,7 +62,7 @@ static struct cpio_data __init find_ucode_in_initrd(void)
  * load_microcode_amd() to save equivalent cpu table and microcode patches in
  * kernel heap memory.
  */
-static void __init apply_ucode_in_initrd(void)
+static void __cpuinit apply_ucode_in_initrd(void)
 {
 	struct cpio_data cd;
 	struct equiv_cpu_entry *eq;
@@ -133,7 +133,7 @@ void __init load_ucode_amd_bsp(void)
 }
 
 #ifdef CONFIG_X86_32
-u8 __cpuinitdata amd_bsp_mpb[MPB_MAX_SIZE];
+u8 amd_bsp_mpb[MPB_MAX_SIZE];
 
 /*
  * On 32-bit, since AP's early load occurs before paging is turned on, we
-- 
1.7.9.5


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