# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1155119096 -32400
# Node ID 0c0877c73915a42678778bdbc9fdaa703a77b965
# Parent  dc37e8c2b96afe282d95a7263fb64ede040b28df
p2m exposure test module
PATCHNAME: p2m_exposure_test_module

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r dc37e8c2b96a -r 0c0877c73915 linux-2.6-xen-sparse/arch/ia64/xen/Makefile
--- a/linux-2.6-xen-sparse/arch/ia64/xen/Makefile	Wed Aug 09 19:24:35 2006 +0900
+++ b/linux-2.6-xen-sparse/arch/ia64/xen/Makefile	Wed Aug 09 19:24:56 2006 +0900
@@ -6,3 +6,5 @@ obj-y := hypercall.o xenivt.o xenentry.o
 	 hypervisor.o pci-dma-xen.o util.o
 
 pci-dma-xen-y := ../../i386/kernel/pci-dma-xen.o
+
+obj-m := expose_p2m.o
\ No newline at end of file
diff -r dc37e8c2b96a -r 0c0877c73915 linux-2.6-xen-sparse/arch/ia64/xen/expose_p2m.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-2.6-xen-sparse/arch/ia64/xen/expose_p2m.c	Wed Aug 09 19:24:56 2006 +0900
@@ -0,0 +1,105 @@
+/******************************************************************************
+ * arch/ia64/xen/expose_p2m.c
+ *
+ * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
+ *                    VA Linux Systems Japan K.K.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/hypercall.h>
+#include <asm/hypervisor.h>
+
+#define printd(fmt, ...)	printk("%s:%d " fmt, __func__, __LINE__, \
+				       ##__VA_ARGS__)
+
+
+static int __init
+expose_p2m_init(void)
+{
+	unsigned long gpfn;
+	unsigned long mfn;
+	unsigned long p2m_mfn;
+	struct timeval before_tv;
+	struct timeval after_tv;
+	nsec_t hyper_nsec;
+	nsec_t p2m_nsec;
+
+	int error_count = 0;
+
+	printd("about to call p2m_expose_init()\n");
+	if (p2m_expose_init() < 0) {
+		printd("p2m_expose_init() failed\n");
+		return -EINVAL;
+	}
+
+	printd("evaluate p2m time with hypercall.\n");
+	do_gettimeofday(&before_tv);
+	for (gpfn = p2m_min_low_pfn; gpfn < p2m_max_low_pfn; gpfn++) {
+		mfn = HYPERVISOR_phystomach(gpfn);
+	}
+	do_gettimeofday(&after_tv);
+	hyper_nsec = timeval_to_ns(&after_tv) - timeval_to_ns(&before_tv);
+
+	printd("evaluate p2m time with the p2m table.\n");
+	do_gettimeofday(&before_tv);
+	for (gpfn = p2m_min_low_pfn; gpfn < p2m_max_low_pfn; gpfn++) {
+		p2m_mfn = p2m_phystomach(gpfn);
+	}
+	do_gettimeofday(&after_tv);
+	p2m_nsec = timeval_to_ns(&after_tv) - timeval_to_ns(&before_tv);
+	printd("hypercall:%ld nsec\n", hyper_nsec);
+	printd("p2m table:%ld nsec\n", p2m_nsec);
+
+	printd("p2m_expose_init() success\n");
+	for (gpfn = p2m_min_low_pfn; gpfn < p2m_max_low_pfn; gpfn++) {
+		mfn = HYPERVISOR_phystomach(gpfn);
+		p2m_mfn = p2m_phystomach(gpfn);
+		if (mfn != p2m_mfn) {
+			printd("gpfn 0x%016lx "
+			       "mfn 0x%016lx p2m_mfn 0x%016lx\n",
+			       gpfn, mfn, p2m_mfn);
+			printd("mpaddr 0x%016lx "
+			       "maddr 0x%016lx p2m_maddr 0x%016lx\n",
+			       gpfn << PAGE_SHIFT,
+			       mfn << PAGE_SHIFT, p2m_mfn << PAGE_SHIFT);
+
+			error_count++;
+			if (error_count > 16) {
+				printk("too many errors\n");
+				return -EINVAL;
+			}
+		}
+	}
+	printd("p2m expose test done!\n");
+
+	return -EINVAL;
+}
+
+static void __exit
+expose_p2m_cleanup(void)
+{
+}
+
+module_init(expose_p2m_init);
+module_exit(expose_p2m_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Isaku Yamahata <yamahata@xxxxxxxxxxxxx>");