linux-kernel - [PATCH 13/30] cr: i386 LDT support

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Date:	Fri, 10 Apr 2009 06:36:25 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	akpm@...ux-foundation.org, containers@...ts.linux-foundation.org
Cc:	xemul@...allels.com, serue@...ibm.com, dave@...ux.vnet.ibm.com,
	mingo@...e.hu, orenl@...columbia.edu, hch@...radead.org,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH 13/30] cr: i386 LDT support

FIXME: LDT actual restoration

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 kernel/cr/cr-x86_32.c |   21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

--- a/kernel/cr/cr-x86_32.c
+++ b/kernel/cr/cr-x86_32.c
@@ -1,6 +1,7 @@
 /* Copyright (C) 2000-2009 Parallels Holdings, Ltd. */
 #include <linux/sched.h>
 #include <asm/i387.h>
+#include <asm/ldt.h>
 
 #include <linux/cr.h>
 #include "cr.h"
@@ -226,21 +227,25 @@ int cr_arch_restore_task_struct(struct task_struct *tsk, struct cr_image_task_st
 
 int cr_arch_check_mm_struct(struct mm_struct *mm)
 {
-	mutex_lock(&mm->context.lock);
-	if (mm->context.ldt || mm->context.size != 0) {
-		mutex_unlock(&mm->context.lock);
-		WARN_ON(1);
-		return -EINVAL;
-	}
 	return 0;
 }
 
 unsigned int cr_arch_len_mm_struct(struct mm_struct *mm)
 {
-	return 0;
+	unsigned int len;
+
+	mutex_lock(&mm->context.lock);
+	len = mm->context.size * LDT_ENTRY_SIZE;
+	mutex_unlock(&mm->context.lock);
+	return len;
 }
 
 int cr_arch_dump_mm_struct(struct cr_context *ctx, struct mm_struct *mm)
 {
-	return 0;
+	int rv;
+
+	mutex_lock(&mm->context.lock);
+	rv = cr_write(ctx, mm->context.ldt, mm->context.size * LDT_ENTRY_SIZE);
+	mutex_unlock(&mm->context.lock);
+	return rv;
 }
--
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