* Hypervisor filesystem for Linux on s390. Diag 204 and 224
* implementation.
*
- * Copyright (C) IBM Corp. 2006
+ * Copyright IBM Corp. 2006, 2008
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
*/
+#define KMSG_COMPONENT "hypfs"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/types.h>
#include <linux/errno.h>
+#include <linux/gfp.h>
+#include <linux/slab.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <asm/ebcdic.h>
}
if (diag204((unsigned long)SUBC_STIB6 |
(unsigned long)INFO_EXT, pages, buf) >= 0) {
- diag204_store_sc = SUBC_STIB7;
+ diag204_store_sc = SUBC_STIB6;
diag204_info_type = INFO_EXT;
goto out;
}
/* Diagnose 224 functions */
-static void diag224(void *ptr)
+static int diag224(void *ptr)
{
- asm volatile("diag %0,%1,0x224" : :"d" (0), "d"(ptr) : "memory");
+ int rc = -ENOTSUPP;
+
+ asm volatile(
+ " diag %1,%2,0x224\n"
+ "0: lhi %0,0x0\n"
+ "1:\n"
+ EX_TABLE(0b,1b)
+ : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
+ return rc;
}
static int diag224_get_name_table(void)
diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
if (!diag224_cpu_names)
return -ENOMEM;
- diag224(diag224_cpu_names);
+ if (diag224(diag224_cpu_names)) {
+ kfree(diag224_cpu_names);
+ return -ENOTSUPP;
+ }
EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
return 0;
}
int rc;
if (diag204_probe()) {
- printk(KERN_ERR "hypfs: diag 204 not working.");
+ pr_err("The hardware system does not support hypfs\n");
return -ENODATA;
}
rc = diag224_get_name_table();
if (rc) {
diag204_free_buffer();
- printk(KERN_ERR "hypfs: could not get name table.\n");
+ pr_err("The hardware system does not provide all "
+ "functions required by hypfs\n");
}
return rc;
}