From the perspective of most users of recent systems, disabling Host
Protected Area (HPA) can break vendor RAID formats, GPT partitions and
risks corrupting firmware or overwriting vendor system recovery tools.
Unfortunately the original (kernels < 2.6.30) behavior (unconditionally
disabling HPA and using full disk capacity) was introduced at the time
when the main use of HPA was to make the drive look small enough for the
BIOS to allow the system to boot with large capacity drives.
Thus to allow the maximum compatibility with the existing setups (using
HPA and partitioned with HPA disabled) we automically disable HPA if
any partitions overlapping HPA are detected. Additionally HPA can also
be disabled using the "nohpa" module parameter (i.e. "ide_core.nohpa=0.0"
to disable HPA on /dev/hda).
v2:
Fix ->resume HPA support.
While at it:
- remove stale "idebus=" entry from Documentation/kernel-parameters.txt
Cc: Robert Hancock <hancockrwd@gmail.com>
Cc: Frans Pop <elendil@planet.nl>
Cc: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
[patch description was based on input from Alan Cox and Frans Pop]
Emphatically-Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* "noflush=[interface_number.device_number]" to disable flush requests
* "noflush=[interface_number.device_number]" to disable flush requests
+* "nohpa=[interface_number.device_number]" to disable Host Protected Area
+
* "noprobe=[interface_number.device_number]" to skip probing
* "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit
* "noprobe=[interface_number.device_number]" to skip probing
* "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit
ide-core.nodma= [HW] (E)IDE subsystem
Format: =0.0 to prevent dma on hda, =0.1 hdb =1.0 hdc
ide-core.nodma= [HW] (E)IDE subsystem
Format: =0.0 to prevent dma on hda, =0.1 hdb =1.0 hdc
- .vlb_clock .pci_clock .noflush .noprobe .nowerr .cdrom
- .chs .ignore_cable are additional options
- See Documentation/ide/ide.txt.
-
- idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed
+ .vlb_clock .pci_clock .noflush .nohpa .noprobe .nowerr
+ .cdrom .chs .ignore_cable are additional options
See Documentation/ide/ide.txt.
ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem
See Documentation/ide/ide.txt.
ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem
capacity, sectors_to_MB(capacity),
set_max, sectors_to_MB(set_max));
capacity, sectors_to_MB(capacity),
set_max, sectors_to_MB(set_max));
+ if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
+ return;
+
set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
if (set_max)
printk(KERN_INFO "%s: Host Protected Area disabled.\n",
set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
if (set_max)
printk(KERN_INFO "%s: Host Protected Area disabled.\n",
goto out;
set = ide_disk_hpa_set_capacity(drive, set, lba48);
goto out;
set = ide_disk_hpa_set_capacity(drive, set, lba48);
+ if (set) {
+ /* needed for ->resume to disable HPA */
+ drive->dev_flags |= IDE_DFLAG_NOHPA;
out:
return drive->capacity64;
}
out:
return drive->capacity64;
}
module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
MODULE_PARM_DESC(noflush, "disable flush requests for a device");
module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
MODULE_PARM_DESC(noflush, "disable flush requests for a device");
+static unsigned int ide_nohpa;
+
+module_param_call(nohpa, ide_set_dev_param_mask, NULL, &ide_nohpa, 0);
+MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device");
+
static unsigned int ide_noprobe;
module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
static unsigned int ide_noprobe;
module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
drive->name);
drive->dev_flags |= IDE_DFLAG_NOFLUSH;
}
drive->name);
drive->dev_flags |= IDE_DFLAG_NOFLUSH;
}
+ if (ide_nohpa & (1 << i)) {
+ printk(KERN_INFO "ide: disabling Host Protected Area for %s\n",
+ drive->name);
+ drive->dev_flags |= IDE_DFLAG_NOHPA;
+ }
if (ide_noprobe & (1 << i)) {
printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
drive->dev_flags |= IDE_DFLAG_NOPROBE;
if (ide_noprobe & (1 << i)) {
printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
drive->dev_flags |= IDE_DFLAG_NOPROBE;
IDE_DFLAG_NICE1 = (1 << 5),
/* device is physically present */
IDE_DFLAG_PRESENT = (1 << 6),
IDE_DFLAG_NICE1 = (1 << 5),
/* device is physically present */
IDE_DFLAG_PRESENT = (1 << 6),
+ /* disable Host Protected Area */
+ IDE_DFLAG_NOHPA = (1 << 7),
/* id read from device (synthetic if not set) */
IDE_DFLAG_ID_READ = (1 << 8),
IDE_DFLAG_NOPROBE = (1 << 9),
/* id read from device (synthetic if not set) */
IDE_DFLAG_ID_READ = (1 << 8),
IDE_DFLAG_NOPROBE = (1 << 9),