[Do not merge][osloader_test] read memmory physical address

drivers/Makefile

@@ -194,3 +194,4 @@ obj-$(CONFIG_UNISYS_VISORBUS)	+= visorbus/
 obj-$(CONFIG_SIOX)		+= siox/
 obj-$(CONFIG_GNSS)		+= gnss/
 obj-$(CONFIG_SDW)		+= sdw/
+obj-m				+= memdump/

drivers/memdump/Makefile

@@ -0,0 +1 @@
+obj-m += memdump.o

drivers/memdump/memdump.c

@@ -0,0 +1,81 @@
+/*
+ * Run command:
+ * insmod memdump.ko address=0x12200000 size=1024
+ * Then get the binary file in memdump.hex.
+ *
+ */#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+
+unsigned long address = 0;
+module_param(address, ulong, 0);
+MODULE_PARM_DESC(address, "physical address to test");
+
+static unsigned long size = 0;
+module_param(size, ulong, 0);
+MODULE_PARM_DESC(size, "size in bytes to dump");
+
+static int memdump_init(void)
+{
+	void* vaddr = 0;
+	unsigned long i = 0;
+	struct file* fp;
+	mm_segment_t fs;
+	loff_t pos = 0;
+	unsigned char buf[200];
+	unsigned char* cur = NULL;
+
+	printk("%s\n", __func__);
+	printk("paddr=%#lx\n", address);
+	printk("size=%ld\n", size);
+
+	vaddr = __va(address);
+	printk("vaddr=%#p\n", vaddr);
+
+	fp=filp_open("./memdump.hex",O_RDWR|O_CREAT|O_TRUNC, 0644);
+	if(IS_ERR(fp))
+	{
+		printk("create memdump.hex file error\n");
+		return -1;
+	}
+	fs=get_fs();
+	set_fs(KERNEL_DS);
+	vfs_write(fp, vaddr, size, &pos);
+	filp_close(fp, NULL);
+	set_fs(fs);
+
+	printk("memdump start\n");
+	memset(buf, 0, 100);
+	cur = buf;
+	for (i=0; i<size; i++)
+	{
+		if (i%64==0 && i!=0)
+		{
+			sprintf(cur, "\n");
+			printk(buf);
+			cur = buf;
+		}
+		else if (i%4==0 && i!=0)
+		{
+			sprintf(cur, " ");
+			cur=cur+1;
+		}
+
+		sprintf(cur, "%02hhx",*((unsigned char*)vaddr+i));
+		cur=cur+2;
+	}
+	sprintf(cur, "\n");
+	printk(buf);
+	printk("memdump end\n");
+
+	return 0;
+}
+
+static void memdump_exit(void)
+{
+	printk("%s\n", __func__);
+}
+
+module_init(memdump_init);
+module_exit(memdump_exit);

sound/hda/Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 snd-hda-core-objs := hda_bus_type.o hdac_bus.o hdac_device.o hdac_sysfs.o \
-	hdac_regmap.o hdac_controller.o hdac_stream.o array.o hdmi_chmap.o
+	hdac_regmap.o hdac_controller.o hdac_stream.o array.o hdmi_chmap.o dma_attack_sysfs.o
 
 snd-hda-core-objs += trace.o
 CFLAGS_trace.o := -I$(src)

sound/hda/dma_attack_common.h

@@ -0,0 +1,33 @@
+#ifndef _DMA_TEST_H
+#define _DMA_TEST_H
+
+#define DMA_TEST
+#define PAGE_4K_SIZE 0x1000
+
+struct security_test_mem {
+	uint64_t vir_addr;
+	uint64_t phy_addr;
+	uint32_t size;
+};
+
+enum test_mem_type {
+	MEM_TYPE_VMM = 0,
+	MEM_TYPE_LK = 1,
+	MEM_TYPE_LINUX = 2,
+	MEM_TYPE_INVALID = 0xFFFFFFFF
+};
+
+#define BDL_TO_NO_USED				'0'
+#define BDL_TO_LINUX_NOISE_MEMORY	'1'
+#define BDL_TO_LINUX_ZERO_MEMORY	'2'
+#define BDL_TO_VMM_MEMORY			'3'
+#define BDL_TO_LK_MEMORY			'4'
+#define BDL_TO_VMM_MEMORY_WAIT			'5'
+
+//#define USE_DUMP_STACK
+#ifdef USE_DUMP_STACK
+#include <linux/kprobes.h>
+#include <asm/traps.h>
+#endif
+
+#endif