From: "Fenghua Yu" <fenghua.yu@intel.com>
To: "H Peter Anvin" <hpa@zytor.com>, "Ingo Molnar" <mingo@elte.hu>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Asit K Mallick" <asit.k.mallick@intel.com>,
"Tigran Aivazian" <tigran@aivazian.fsnet.co.uk>,
"Yinghai Lu" <yinghai@kernel.org>,
"Andreas Herrmann" <andreas.herrmann3@amd.com>,
"Borislav Petkov" <borislav.petkov@amd.com>,
"linux-kernel" <linux-kernel@vger.kernel.org>,
"x86" <x86@kernel.org>
Cc: "Fenghua Yu" <fenghua.yu@intel.com>
Subject: [PATCH v5 11/12] x86/mm/init.c: Copy ucode from initrd image to kernel memory
Date: Thu, 20 Dec 2012 23:44:31 -0800 [thread overview]
Message-ID: <1356075872-3054-12-git-send-email-fenghua.yu@intel.com> (raw)
In-Reply-To: <1356075872-3054-1-git-send-email-fenghua.yu@intel.com>
From: Fenghua Yu <fenghua.yu@intel.com>
Before initrd image is freed, copy valid ucode patches from initrd image
to kernel memory. The saved ucode will be used to update AP in resume
or hotplug.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
---
arch/x86/mm/init.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 5f59473..36bad16 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -16,6 +16,7 @@
#include <asm/tlb.h>
#include <asm/proto.h>
#include <asm/dma.h> /* for MAX_DMA_PFN */
+#include <asm/microcode.h>
#include "mm_internal.h"
@@ -555,6 +556,15 @@ void free_initmem(void)
#ifdef CONFIG_BLK_DEV_INITRD
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
+#ifdef CONFIG_MICROCODE_EARLY
+ /*
+ * Remember, initrd memory may contain microcode or other useful things.
+ * Before we lose initrd mem, we need to find a place to hold them
+ * now that normal virtual memory is enabled.
+ */
+ save_microcode_in_initrd();
+#endif
+
/*
* end could be not aligned, and We can not align that,
* decompresser could be confused by aligned initrd_end
--
1.8.0.1
next prev parent reply other threads:[~2012-12-21 14:48 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-21 7:44 [PATCH v5 00/12] x86/microcode: Early load microcode Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 01/12] Documentation/x86: " Fenghua Yu
2013-01-31 22:25 ` [tip:x86/microcode] x86, doc: Documentation for early microcode loading tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 02/12] x86/microcode_intel.h: Define functions and macros for early loading ucode Fenghua Yu
2013-01-31 22:26 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 03/12] x86/common.c: Make have_cpuid_p() a global function Fenghua Yu
2013-01-31 22:27 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 04/12] x86/common.c: load ucode in 64 bit or show loading ucode info in 32 bit on AP Fenghua Yu
2013-01-31 22:28 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 05/12] x86/microcode_core_early.c: Define interfaces for early loading ucode Fenghua Yu
2013-01-31 22:29 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 06/12] x86/microcode_intel_lib.c: Early update ucode on Intel's CPU Fenghua Yu
2013-01-31 22:31 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 07/12] x86/tlbflush.h: Define __native_flush_tlb_global_irq_disabled() Fenghua Yu
2013-01-31 22:32 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 08/12] x86/microcode_intel_early.c: Early update ucode on Intel's CPU Fenghua Yu
2013-01-31 22:33 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 09/12] x86/head_32.S: Early update ucode in 32-bit Fenghua Yu
2013-01-31 22:34 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 10/12] x86/head64.c: Early update ucode in 64-bit Fenghua Yu
2013-01-31 22:35 ` [tip:x86/microcode] " tip-bot for Fenghua Yu
2012-12-21 7:44 ` Fenghua Yu [this message]
2013-01-31 22:37 ` [tip:x86/microcode] x86/mm/init.c: Copy ucode from initrd image to kernel memory tip-bot for Fenghua Yu
2012-12-21 7:44 ` [PATCH v5 12/12] x86/Kconfig: Configurations to enable/disable the feature Fenghua Yu
2013-01-31 22:38 ` [tip:x86/microcode] x86/Kconfig: Make early microcode loading a configuration feature tip-bot for Fenghua Yu
2013-01-03 17:44 ` [PATCH v5 00/12] x86/microcode: Early load microcode Konrad Rzeszutek Wilk
2013-01-03 17:48 ` H. Peter Anvin
2013-01-08 19:46 ` Konrad Rzeszutek Wilk
2013-01-08 19:47 ` H. Peter Anvin
2013-01-08 20:04 ` Konrad Rzeszutek Wilk
2013-01-08 20:16 ` H. Peter Anvin
2013-01-09 13:35 ` Konrad Rzeszutek Wilk
2023-10-09 12:29 ` [tip: x86/microcode] x86/microcode/32: Move early loading after paging enable tip-bot2 for Thomas Gleixner
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