linux-kernel - [PATCH v4 08/11] x86/head_32.S: Early update ucode in 32-bit

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Date:	Thu, 20 Dec 2012 11:48:10 -0800
From:	"Fenghua Yu" <fenghua.yu@...el.com>
To:	"H Peter Anvin" <hpa@...or.com>, "Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Asit K Mallick" <asit.k.mallick@...el.com>,
	"Tigran Aivazian" <tigran@...azian.fsnet.co.uk>,
	"Yinghai Lu" <yinghai@...nel.org>,
	"Andreas Herrmann" <andreas.herrmann3@....com>,
	"Borislav Petkov" <borislav.petkov@....com>,
	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"x86" <x86@...nel.org>
Cc:	"Fenghua Yu" <fenghua.yu@...el.com>
Subject: [PATCH v4 08/11] x86/head_32.S: Early update ucode in 32-bit

From: Fenghua Yu <fenghua.yu@...el.com>

This updates ucode in 32-bit kernel. At this point, there is no paging and no
virtual address yet.

Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
---
 arch/x86/kernel/head_32.S | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 8e7f655..fdc11f6 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -144,6 +144,12 @@ ENTRY(startup_32)
 	movl %eax, pa(olpc_ofw_pgd)
 #endif
 
+#ifdef CONFIG_MICROCODE_EARLY
+	/* Early load ucode on BSP. */
+	movl $pa(boot_params), %eax
+	call load_ucode_bsp
+#endif
+
 /*
  * Initialize page tables.  This creates a PDE and a set of page
  * tables, which are located immediately beyond __brk_base.  The variable
@@ -299,6 +305,12 @@ ENTRY(startup_32_smp)
 	movl %eax,%ss
 	leal -__PAGE_OFFSET(%ecx),%esp
 
+#ifdef CONFIG_MICROCODE_EARLY
+	/* Early load ucode on AP. */
+	call load_ucode_ap
+#endif
+
+
 default_entry:
 /*
  *	New page tables may be in 4Mbyte page mode and may
-- 
1.8.0.1

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