Patchwork [v3] efi_runtime: add efi_runtime kernel driver module into fwts

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Submitter Ivan Hu
Date Sept. 21, 2012, 9:14 a.m.
Message ID <1348218880-14960-1-git-send-email-ivan.hu@canonical.com>
Download mbox | patch
Permalink /patch/185634/
State Accepted
Headers show

Comments

Ivan Hu - Sept. 21, 2012, 9:14 a.m.
efi_runtime kernel driver provides the runtime UEFI interfaces for fwts
to test the UEFI runtime service implementiation.
Current capabilities:
* provide the RT service interfaces:
   * GetVariable
   * SetVariable
   * GetTime
   * SetTime
   * GetWakeupTime
   * SetWakeupTime
   * GetNextVariableName

Signed-off-by: Ivan Hu <ivan.hu@canonical.com>
---
 efi_runtime/Makefile      |    6 +
 efi_runtime/efi_runtime.c |  325 +++++++++++++++++++++++++++++++++++++++++++++
 efi_runtime/efi_runtime.h |  119 +++++++++++++++++
 3 files changed, 450 insertions(+)
 create mode 100644 efi_runtime/Makefile
 create mode 100644 efi_runtime/efi_runtime.c
 create mode 100644 efi_runtime/efi_runtime.h
Colin King - Sept. 21, 2012, 1:05 p.m.
On 21/09/12 10:14, Ivan Hu wrote:
> efi_runtime kernel driver provides the runtime UEFI interfaces for fwts
> to test the UEFI runtime service implementiation.
> Current capabilities:
> * provide the RT service interfaces:
>     * GetVariable
>     * SetVariable
>     * GetTime
>     * SetTime
>     * GetWakeupTime
>     * SetWakeupTime
>     * GetNextVariableName
>
> Signed-off-by: Ivan Hu <ivan.hu@canonical.com>
> ---
>   efi_runtime/Makefile      |    6 +
>   efi_runtime/efi_runtime.c |  325 +++++++++++++++++++++++++++++++++++++++++++++
>   efi_runtime/efi_runtime.h |  119 +++++++++++++++++
>   3 files changed, 450 insertions(+)
>   create mode 100644 efi_runtime/Makefile
>   create mode 100644 efi_runtime/efi_runtime.c
>   create mode 100644 efi_runtime/efi_runtime.h
>
> diff --git a/efi_runtime/Makefile b/efi_runtime/Makefile
> new file mode 100644
> index 0000000..8ed7dea
> --- /dev/null
> +++ b/efi_runtime/Makefile
> @@ -0,0 +1,6 @@
> +obj-m += efi_runtime.o
> +all:
> +	make -C /lib/modules/`uname -r`/build M=`pwd` modules
> +
> +clean:
> +	make -C /lib/modules/`uname -r`/build M=`pwd` clean
> diff --git a/efi_runtime/efi_runtime.c b/efi_runtime/efi_runtime.c
> new file mode 100644
> index 0000000..7d99fbc
> --- /dev/null
> +++ b/efi_runtime/efi_runtime.c
> @@ -0,0 +1,325 @@
> +/*
> + * EFI Runtime driver
> + *
> + * Copyright(C) 2012 Canonical Ltd.
> + *
> + *  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/miscdevice.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/proc_fs.h>
> +#include <linux/efi.h>
> +
> +#include <linux/uaccess.h>
> +
> +#include "efi_runtime.h"
> +
> +#define EFI_FWTS_EFI_VERSION	"0.1"
> +
> +MODULE_AUTHOR("Ivan Hu");
> +MODULE_DESCRIPTION("EFI Runtime Driver");
> +MODULE_LICENSE("GPL");
> +
> +static void convert_from_efi_time(efi_time_t *eft, EFI_TIME *time)
> +{
> +	memset(time, 0, sizeof(EFI_TIME));
> +	time->Year = eft->year;
> +	time->Month = eft->month;
> +	time->Day  = eft->day;
> +	time->Hour = eft->hour;
> +	time->Minute = eft->minute;
> +	time->Second  = eft->second;
> +	time->Pad1 = eft->pad1;
> +	time->Nanosecond = eft->nanosecond;
> +	time->TimeZone = eft->timezone;
> +	time->Daylight = eft->daylight;
> +	time->Pad2 = eft->pad2;
> +}
> +
> +static void convert_to_efi_time(efi_time_t *eft, EFI_TIME *time)
> +{
> +	memset(eft, 0, sizeof(eft));
> +	eft->year = time->Year;
> +	eft->month = time->Month;
> +	eft->day = time->Day;
> +	eft->hour = time->Hour;
> +	eft->minute = time->Minute;
> +	eft->second = time->Second;
> +	eft->pad1 = time->Pad1;
> +	eft->nanosecond = time->Nanosecond;
> +	eft->timezone = time->TimeZone;
> +	eft->daylight = time->Daylight;
> +	eft->pad2 = time->Pad2;
> +}
> +
> +static void convert_from_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
> +{
> +	int i;
> +	for (i = 0; i < 16; i++) {
> +		if (i < 4)
> +			vendor->b[i] = (vendor_guid->Data1 >> (8*i)) & 0xff;
> +		else if (i < 6)
> +			vendor->b[i] = (vendor_guid->Data2 >> (8*(i-4))) & 0xff;
> +		else if (i < 8)
> +			vendor->b[i] = (vendor_guid->Data3 >> (8*(i-6))) & 0xff;
> +		else
> +			vendor->b[i] = (vendor_guid->Data4[i-8]);
> +	}
> +}
> +
> +static void convert_to_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
> +{
> +	int i;
> +	vendor_guid->Data1 = vendor->b[0] + (vendor->b[1] << 8) +
> +				(vendor->b[2] << 16) + (vendor->b[3] << 24);
> +	vendor_guid->Data2 = vendor->b[4] + (vendor->b[5] << 8);
> +	vendor_guid->Data3 = vendor->b[6] + (vendor->b[7] << 8);
> +	for (i = 0; i < 8; i++)
> +		vendor_guid->Data4[i] = vendor->b[i+8];
> +}
> +
> +static long efi_runtime_ioctl(struct file *file, unsigned int cmd,
> +							unsigned long arg)
> +{
> +	efi_status_t status;
> +	struct efi_getvariable __user *pgetvariable;
> +	struct efi_setvariable __user *psetvariable;
> +
> +	efi_guid_t vendor;
> +	EFI_GUID vendor_guid;
> +	unsigned long datasize;
> +	uint32_t attr;
> +
> +	efi_time_t eft;
> +	efi_time_cap_t cap;
> +	struct efi_gettime __user *pgettime;
> +	struct efi_settime __user *psettime;
> +
> +	unsigned char enabled, pending;
> +	EFI_TIME efi_time;
> +	struct efi_getwakeuptime __user *pgetwakeuptime;
> +	struct efi_setwakeuptime __user *psetwakeuptime;
> +
> +	struct efi_getnextvariablename __user *pgetnextvariablename;
> +	unsigned long name_size;
> +
> +	switch (cmd) {
> +	case EFI_RUNTIME_GET_VARIABLE:
> +		pgetvariable = (struct efi_getvariable __user *)arg;
> +
> +		if (get_user(datasize, pgetvariable->DataSize) ||
> +			copy_from_user(&vendor_guid, pgetvariable->VendorGuid,
> +							sizeof(EFI_GUID)))
> +			return -EFAULT;
> +
> +		convert_from_guid(&vendor, &vendor_guid);
> +		status = efi.get_variable(pgetvariable->VariableName, &vendor,
> +					&attr, &datasize, pgetvariable->Data);
> +		if (put_user(status, pgetvariable->status))
> +			return -EFAULT;
> +		if (status == EFI_SUCCESS) {
> +			if (put_user(attr, pgetvariable->Attributes) ||
> +				put_user(datasize, pgetvariable->DataSize))
> +				return -EFAULT;
> +			return 0;
> +		} else {
> +			printk(KERN_ERR "efi_runtime: can't get variable\n");
> +			return -EINVAL;
> +		}
> +
> +	case EFI_RUNTIME_SET_VARIABLE:
> +		psetvariable = (struct efi_setvariable __user *)arg;
> +		if (get_user(datasize, &psetvariable->DataSize) ||
> +			get_user(attr, &psetvariable->Attributes) ||
> +			copy_from_user(&vendor_guid, psetvariable->VendorGuid,
> +							sizeof(EFI_GUID)))
> +			return -EFAULT;
> +
> +		convert_from_guid(&vendor, &vendor_guid);
> +		status = efi.set_variable(psetvariable->VariableName, &vendor,
> +					attr, datasize, psetvariable->Data);
> +
> +		if (put_user(status, psetvariable->status))
> +			return -EFAULT;
> +		return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +	case EFI_RUNTIME_GET_TIME:
> +		status = efi.get_time(&eft, &cap);
> +		pgettime = (struct efi_gettime __user *)arg;
> +		if (put_user(status, pgettime->status))
> +			return -EFAULT;
> +		if (status != EFI_SUCCESS) {
> +			printk(KERN_ERR "efitime: can't read time\n");
> +			return -EINVAL;
> +		}
> +		if (put_user(cap.resolution,
> +					&pgettime->Capabilities->Resolution) ||
> +					put_user(cap.accuracy,
> +					&pgettime->Capabilities->Accuracy) ||
> +					put_user(cap.sets_to_zero,
> +					&pgettime->Capabilities->SetsToZero))
> +			return -EFAULT;
> +		return copy_to_user(pgettime->Time, &eft,
> +				sizeof(EFI_TIME)) ? -EFAULT : 0;
> +
> +	case EFI_RUNTIME_SET_TIME:
> +
> +		psettime = (struct efi_settime __user *)arg;
> +		if (copy_from_user(&efi_time, psettime->Time,
> +						sizeof(EFI_TIME)))
> +			return -EFAULT;
> +		convert_to_efi_time(&eft, &efi_time);
> +		status = efi.set_time(&eft);
> +
> +		if (put_user(status, psettime->status))
> +			return -EFAULT;
> +
> +		return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +	case EFI_RUNTIME_GET_WAKETIME:
> +
> +		status = efi.get_wakeup_time((efi_bool_t *)&enabled,
> +						(efi_bool_t *)&pending, &eft);
> +
> +		pgetwakeuptime = (struct efi_getwakeuptime __user *)arg;
> +
> +		if (put_user(status, pgetwakeuptime->status))
> +			return -EFAULT;
> +		if (status != EFI_SUCCESS)
> +			return -EINVAL;
> +
> +		if (put_user(enabled, pgetwakeuptime->Enabled) ||
> +				put_user(pending, pgetwakeuptime->Pending))
> +			return -EFAULT;
> +
> +		convert_from_efi_time(&eft, &efi_time);
> +
> +		return copy_to_user(pgetwakeuptime->Time, &efi_time,
> +				sizeof(EFI_TIME)) ? -EFAULT : 0;
> +
> +	case EFI_RUNTIME_SET_WAKETIME:
> +
> +		psetwakeuptime = (struct efi_setwakeuptime __user *)arg;
> +
> +		if (get_user(enabled, &psetwakeuptime->Enabled) ||
> +					copy_from_user(&efi_time,
> +					psetwakeuptime->Time,
> +					sizeof(EFI_TIME)))
> +			return -EFAULT;
> +
> +		convert_to_efi_time(&eft, &efi_time);
> +
> +		status = efi.set_wakeup_time(enabled, &eft);
> +
> +		if (put_user(status, psetwakeuptime->status))
> +			return -EFAULT;
> +
> +		return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +	case EFI_RUNTIME_GET_NEXTVARIABLENAME:
> +
> +		pgetnextvariablename = (struct efi_getnextvariablename
> +								__user *)arg;
> +
> +		if (get_user(name_size, pgetnextvariablename->VariableNameSize)
> +				|| copy_from_user(&vendor_guid,
> +					pgetnextvariablename->VendorGuid,
> +					sizeof(EFI_GUID)))
> +			return -EFAULT;
> +		if (name_size > 1024)
> +			return -EFAULT;
> +
> +		convert_from_guid(&vendor, &vendor_guid);
> +
> +		status = efi.get_next_variable(&name_size,
> +					pgetnextvariablename->VariableName,
> +								&vendor);
> +		if (put_user(status, pgetnextvariablename->status))
> +			return -EFAULT;
> +		if (status != EFI_SUCCESS)
> +			return -EINVAL;
> +		convert_to_guid(&vendor, &vendor_guid);
> +
> +		if (put_user(name_size, pgetnextvariablename->VariableNameSize))
> +			return -EFAULT;
> +
> +		if (copy_to_user(pgetnextvariablename->VendorGuid,
> +						&vendor_guid, sizeof(EFI_GUID)))
> +			return -EFAULT;
> +		return 0;
> +	}
> +
> +	return -ENOTTY;
> +}
> +
> +static int efi_runtime_open(struct inode *inode, struct file *file)
> +{
> +	/*
> +	 * nothing special to do here
> +	 * We do accept multiple open files at the same time as we
> +	 * synchronize on the per call operation.
> +	 */
> +	return 0;
> +}
> +
> +static int efi_runtime_close(struct inode *inode, struct file *file)
> +{
> +	return 0;
> +}
> +
> +/*
> + *	The various file operations we support.
> + */
> +static const struct file_operations efi_runtime_fops = {
> +	.owner		= THIS_MODULE,
> +	.unlocked_ioctl	= efi_runtime_ioctl,
> +	.open		= efi_runtime_open,
> +	.release	= efi_runtime_close,
> +	.llseek		= no_llseek,
> +};
> +
> +static struct miscdevice efi_runtime_dev = {
> +	MISC_DYNAMIC_MINOR,
> +	"efi_runtime",
> +	&efi_runtime_fops
> +};
> +
> +static int __init efi_runtime_init(void)
> +{
> +	int ret;
> +
> +	printk(KERN_INFO "EFI_RUNTIME Driver v%s\n", EFI_FWTS_EFI_VERSION);
> +
> +	ret = misc_register(&efi_runtime_dev);
> +	if (ret) {
> +		printk(KERN_ERR "efi_runtime: can't misc_register on minor=%d\n",
> +				MISC_DYNAMIC_MINOR);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static void __exit efi_runtime_exit(void)
> +{
> +	printk(KERN_INFO "EFI_RUNTIME Driver Exit.\n");
> +	misc_deregister(&efi_runtime_dev);
> +}
> +
> +module_init(efi_runtime_init);
> +module_exit(efi_runtime_exit);
> +
> diff --git a/efi_runtime/efi_runtime.h b/efi_runtime/efi_runtime.h
> new file mode 100644
> index 0000000..7387406
> --- /dev/null
> +++ b/efi_runtime/efi_runtime.h
> @@ -0,0 +1,119 @@
> +/*
> + * EFI Runtime driver
> + *
> + * Copyright(C) 2012 Canonical Ltd.
> + *
> + *  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
> + */
> +
> +#ifndef _EFI_RUNTIME_H_
> +#define _EFI_RUNTIME_H_
> +
> +typedef struct {
> +	uint32_t	Data1;
> +	uint16_t	Data2;
> +	uint16_t	Data3;
> +	uint8_t		Data4[8];
> +} __attribute__ ((packed)) EFI_GUID;
> +
> +typedef struct {
> +	uint16_t	Year;		/* 1900 – 9999 */
> +	uint8_t		Month;		/* 1 – 12 */
> +	uint8_t		Day;		/* 1 – 31 */
> +	uint8_t		Hour;		/* 0 – 23 */
> +	uint8_t		Minute;		/* 0 – 59 */
> +	uint8_t		Second;		/* 0 – 59 */
> +	uint8_t		Pad1;
> +	uint32_t	Nanosecond;	/* 0 – 999,999,999 */
> +	int16_t		TimeZone;	/* -1440 to 1440 or 2047 */
> +	uint8_t		Daylight;
> +	uint8_t		Pad2;
> +} __attribute__ ((packed)) EFI_TIME;
> +
> +typedef struct {
> +	uint32_t	Resolution;
> +	uint32_t	Accuracy;
> +	uint8_t		SetsToZero;
> +} __attribute__ ((packed)) EFI_TIME_CAPABILITIES;
> +
> +struct efi_getvariable {
> +	uint16_t	*VariableName;
> +	EFI_GUID	*VendorGuid;
> +	uint32_t	*Attributes;
> +	uint64_t	*DataSize;
> +	void		*Data;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_setvariable {
> +	uint16_t	*VariableName;
> +	EFI_GUID	*VendorGuid;
> +	uint32_t	Attributes;
> +	uint64_t	DataSize;
> +	void		*Data;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_getnextvariablename {
> +	uint64_t	*VariableNameSize;
> +	uint16_t	*VariableName;
> +	EFI_GUID	*VendorGuid;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_gettime {
> +	EFI_TIME		*Time;
> +	EFI_TIME_CAPABILITIES	*Capabilities;
> +	uint64_t		*status;
> +} __attribute__ ((packed));
> +
> +struct efi_settime {
> +	EFI_TIME		*Time;
> +	uint64_t		*status;
> +} __attribute__ ((packed));
> +
> +struct efi_getwakeuptime {
> +	uint8_t		*Enabled;
> +	uint8_t		*Pending;
> +	EFI_TIME	*Time;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_setwakeuptime {
> +	uint8_t		Enabled;
> +	EFI_TIME	*Time;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +/* ioctl calls that are permitted to the /dev/efi_runtime interface. */
> +#define EFI_RUNTIME_GET_VARIABLE \
> +	_IOWR('p', 0x01, struct efi_getvariable)
> +#define EFI_RUNTIME_SET_VARIABLE \
> +	_IOW('p', 0x02, struct efi_setvariable)
> +
> +#define EFI_RUNTIME_GET_TIME \
> +	_IOR('p', 0x03, struct efi_gettime)
> +#define EFI_RUNTIME_SET_TIME \
> +	_IOW('p', 0x04, struct efi_settime)
> +
> +#define EFI_RUNTIME_GET_WAKETIME \
> +	_IOR('p', 0x05, struct efi_getwakeuptime)
> +#define EFI_RUNTIME_SET_WAKETIME \
> +	_IOW('p', 0x06, struct efi_setwakeuptime)
> +
> +#define EFI_RUNTIME_GET_NEXTVARIABLENAME \
> +	_IOWR('p', 0x07, struct efi_getnextvariablename)
> +
> +#endif /* _EFI_RUNTIME_H_ */
>

Many thanks Ivan.  Let's get this into fwts and we can get the ball 
rolling on this.

Colin
Keng-Yu Lin - Sept. 24, 2012, 6:37 a.m.
On Fri, Sep 21, 2012 at 5:14 PM, Ivan Hu <ivan.hu@canonical.com> wrote:
> efi_runtime kernel driver provides the runtime UEFI interfaces for fwts
> to test the UEFI runtime service implementiation.
> Current capabilities:
> * provide the RT service interfaces:
>    * GetVariable
>    * SetVariable
>    * GetTime
>    * SetTime
>    * GetWakeupTime
>    * SetWakeupTime
>    * GetNextVariableName
>
> Signed-off-by: Ivan Hu <ivan.hu@canonical.com>
> ---
>  efi_runtime/Makefile      |    6 +
>  efi_runtime/efi_runtime.c |  325 +++++++++++++++++++++++++++++++++++++++++++++
>  efi_runtime/efi_runtime.h |  119 +++++++++++++++++
>  3 files changed, 450 insertions(+)
>  create mode 100644 efi_runtime/Makefile
>  create mode 100644 efi_runtime/efi_runtime.c
>  create mode 100644 efi_runtime/efi_runtime.h
>
> diff --git a/efi_runtime/Makefile b/efi_runtime/Makefile
> new file mode 100644
> index 0000000..8ed7dea
> --- /dev/null
> +++ b/efi_runtime/Makefile
> @@ -0,0 +1,6 @@
> +obj-m += efi_runtime.o
> +all:
> +       make -C /lib/modules/`uname -r`/build M=`pwd` modules
> +
> +clean:
> +       make -C /lib/modules/`uname -r`/build M=`pwd` clean
> diff --git a/efi_runtime/efi_runtime.c b/efi_runtime/efi_runtime.c
> new file mode 100644
> index 0000000..7d99fbc
> --- /dev/null
> +++ b/efi_runtime/efi_runtime.c
> @@ -0,0 +1,325 @@
> +/*
> + * EFI Runtime driver
> + *
> + * Copyright(C) 2012 Canonical Ltd.
> + *
> + *  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/miscdevice.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/proc_fs.h>
> +#include <linux/efi.h>
> +
> +#include <linux/uaccess.h>
> +
> +#include "efi_runtime.h"
> +
> +#define EFI_FWTS_EFI_VERSION   "0.1"
> +
> +MODULE_AUTHOR("Ivan Hu");
> +MODULE_DESCRIPTION("EFI Runtime Driver");
> +MODULE_LICENSE("GPL");
> +
> +static void convert_from_efi_time(efi_time_t *eft, EFI_TIME *time)
> +{
> +       memset(time, 0, sizeof(EFI_TIME));
> +       time->Year = eft->year;
> +       time->Month = eft->month;
> +       time->Day  = eft->day;
> +       time->Hour = eft->hour;
> +       time->Minute = eft->minute;
> +       time->Second  = eft->second;
> +       time->Pad1 = eft->pad1;
> +       time->Nanosecond = eft->nanosecond;
> +       time->TimeZone = eft->timezone;
> +       time->Daylight = eft->daylight;
> +       time->Pad2 = eft->pad2;
> +}
> +
> +static void convert_to_efi_time(efi_time_t *eft, EFI_TIME *time)
> +{
> +       memset(eft, 0, sizeof(eft));
> +       eft->year = time->Year;
> +       eft->month = time->Month;
> +       eft->day = time->Day;
> +       eft->hour = time->Hour;
> +       eft->minute = time->Minute;
> +       eft->second = time->Second;
> +       eft->pad1 = time->Pad1;
> +       eft->nanosecond = time->Nanosecond;
> +       eft->timezone = time->TimeZone;
> +       eft->daylight = time->Daylight;
> +       eft->pad2 = time->Pad2;
> +}
> +
> +static void convert_from_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
> +{
> +       int i;
> +       for (i = 0; i < 16; i++) {
> +               if (i < 4)
> +                       vendor->b[i] = (vendor_guid->Data1 >> (8*i)) & 0xff;
> +               else if (i < 6)
> +                       vendor->b[i] = (vendor_guid->Data2 >> (8*(i-4))) & 0xff;
> +               else if (i < 8)
> +                       vendor->b[i] = (vendor_guid->Data3 >> (8*(i-6))) & 0xff;
> +               else
> +                       vendor->b[i] = (vendor_guid->Data4[i-8]);
> +       }
> +}
> +
> +static void convert_to_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
> +{
> +       int i;
> +       vendor_guid->Data1 = vendor->b[0] + (vendor->b[1] << 8) +
> +                               (vendor->b[2] << 16) + (vendor->b[3] << 24);
> +       vendor_guid->Data2 = vendor->b[4] + (vendor->b[5] << 8);
> +       vendor_guid->Data3 = vendor->b[6] + (vendor->b[7] << 8);
> +       for (i = 0; i < 8; i++)
> +               vendor_guid->Data4[i] = vendor->b[i+8];
> +}
> +
> +static long efi_runtime_ioctl(struct file *file, unsigned int cmd,
> +                                                       unsigned long arg)
> +{
> +       efi_status_t status;
> +       struct efi_getvariable __user *pgetvariable;
> +       struct efi_setvariable __user *psetvariable;
> +
> +       efi_guid_t vendor;
> +       EFI_GUID vendor_guid;
> +       unsigned long datasize;
> +       uint32_t attr;
> +
> +       efi_time_t eft;
> +       efi_time_cap_t cap;
> +       struct efi_gettime __user *pgettime;
> +       struct efi_settime __user *psettime;
> +
> +       unsigned char enabled, pending;
> +       EFI_TIME efi_time;
> +       struct efi_getwakeuptime __user *pgetwakeuptime;
> +       struct efi_setwakeuptime __user *psetwakeuptime;
> +
> +       struct efi_getnextvariablename __user *pgetnextvariablename;
> +       unsigned long name_size;
> +
> +       switch (cmd) {
> +       case EFI_RUNTIME_GET_VARIABLE:
> +               pgetvariable = (struct efi_getvariable __user *)arg;
> +
> +               if (get_user(datasize, pgetvariable->DataSize) ||
> +                       copy_from_user(&vendor_guid, pgetvariable->VendorGuid,
> +                                                       sizeof(EFI_GUID)))
> +                       return -EFAULT;
> +
> +               convert_from_guid(&vendor, &vendor_guid);
> +               status = efi.get_variable(pgetvariable->VariableName, &vendor,
> +                                       &attr, &datasize, pgetvariable->Data);
> +               if (put_user(status, pgetvariable->status))
> +                       return -EFAULT;
> +               if (status == EFI_SUCCESS) {
> +                       if (put_user(attr, pgetvariable->Attributes) ||
> +                               put_user(datasize, pgetvariable->DataSize))
> +                               return -EFAULT;
> +                       return 0;
> +               } else {
> +                       printk(KERN_ERR "efi_runtime: can't get variable\n");
> +                       return -EINVAL;
> +               }
> +
> +       case EFI_RUNTIME_SET_VARIABLE:
> +               psetvariable = (struct efi_setvariable __user *)arg;
> +               if (get_user(datasize, &psetvariable->DataSize) ||
> +                       get_user(attr, &psetvariable->Attributes) ||
> +                       copy_from_user(&vendor_guid, psetvariable->VendorGuid,
> +                                                       sizeof(EFI_GUID)))
> +                       return -EFAULT;
> +
> +               convert_from_guid(&vendor, &vendor_guid);
> +               status = efi.set_variable(psetvariable->VariableName, &vendor,
> +                                       attr, datasize, psetvariable->Data);
> +
> +               if (put_user(status, psetvariable->status))
> +                       return -EFAULT;
> +               return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +       case EFI_RUNTIME_GET_TIME:
> +               status = efi.get_time(&eft, &cap);
> +               pgettime = (struct efi_gettime __user *)arg;
> +               if (put_user(status, pgettime->status))
> +                       return -EFAULT;
> +               if (status != EFI_SUCCESS) {
> +                       printk(KERN_ERR "efitime: can't read time\n");
> +                       return -EINVAL;
> +               }
> +               if (put_user(cap.resolution,
> +                                       &pgettime->Capabilities->Resolution) ||
> +                                       put_user(cap.accuracy,
> +                                       &pgettime->Capabilities->Accuracy) ||
> +                                       put_user(cap.sets_to_zero,
> +                                       &pgettime->Capabilities->SetsToZero))
> +                       return -EFAULT;
> +               return copy_to_user(pgettime->Time, &eft,
> +                               sizeof(EFI_TIME)) ? -EFAULT : 0;
> +
> +       case EFI_RUNTIME_SET_TIME:
> +
> +               psettime = (struct efi_settime __user *)arg;
> +               if (copy_from_user(&efi_time, psettime->Time,
> +                                               sizeof(EFI_TIME)))
> +                       return -EFAULT;
> +               convert_to_efi_time(&eft, &efi_time);
> +               status = efi.set_time(&eft);
> +
> +               if (put_user(status, psettime->status))
> +                       return -EFAULT;
> +
> +               return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +       case EFI_RUNTIME_GET_WAKETIME:
> +
> +               status = efi.get_wakeup_time((efi_bool_t *)&enabled,
> +                                               (efi_bool_t *)&pending, &eft);
> +
> +               pgetwakeuptime = (struct efi_getwakeuptime __user *)arg;
> +
> +               if (put_user(status, pgetwakeuptime->status))
> +                       return -EFAULT;
> +               if (status != EFI_SUCCESS)
> +                       return -EINVAL;
> +
> +               if (put_user(enabled, pgetwakeuptime->Enabled) ||
> +                               put_user(pending, pgetwakeuptime->Pending))
> +                       return -EFAULT;
> +
> +               convert_from_efi_time(&eft, &efi_time);
> +
> +               return copy_to_user(pgetwakeuptime->Time, &efi_time,
> +                               sizeof(EFI_TIME)) ? -EFAULT : 0;
> +
> +       case EFI_RUNTIME_SET_WAKETIME:
> +
> +               psetwakeuptime = (struct efi_setwakeuptime __user *)arg;
> +
> +               if (get_user(enabled, &psetwakeuptime->Enabled) ||
> +                                       copy_from_user(&efi_time,
> +                                       psetwakeuptime->Time,
> +                                       sizeof(EFI_TIME)))
> +                       return -EFAULT;
> +
> +               convert_to_efi_time(&eft, &efi_time);
> +
> +               status = efi.set_wakeup_time(enabled, &eft);
> +
> +               if (put_user(status, psetwakeuptime->status))
> +                       return -EFAULT;
> +
> +               return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +       case EFI_RUNTIME_GET_NEXTVARIABLENAME:
> +
> +               pgetnextvariablename = (struct efi_getnextvariablename
> +                                                               __user *)arg;
> +
> +               if (get_user(name_size, pgetnextvariablename->VariableNameSize)
> +                               || copy_from_user(&vendor_guid,
> +                                       pgetnextvariablename->VendorGuid,
> +                                       sizeof(EFI_GUID)))
> +                       return -EFAULT;
> +               if (name_size > 1024)
> +                       return -EFAULT;
> +
> +               convert_from_guid(&vendor, &vendor_guid);
> +
> +               status = efi.get_next_variable(&name_size,
> +                                       pgetnextvariablename->VariableName,
> +                                                               &vendor);
> +               if (put_user(status, pgetnextvariablename->status))
> +                       return -EFAULT;
> +               if (status != EFI_SUCCESS)
> +                       return -EINVAL;
> +               convert_to_guid(&vendor, &vendor_guid);
> +
> +               if (put_user(name_size, pgetnextvariablename->VariableNameSize))
> +                       return -EFAULT;
> +
> +               if (copy_to_user(pgetnextvariablename->VendorGuid,
> +                                               &vendor_guid, sizeof(EFI_GUID)))
> +                       return -EFAULT;
> +               return 0;
> +       }
> +
> +       return -ENOTTY;
> +}
> +
> +static int efi_runtime_open(struct inode *inode, struct file *file)
> +{
> +       /*
> +        * nothing special to do here
> +        * We do accept multiple open files at the same time as we
> +        * synchronize on the per call operation.
> +        */
> +       return 0;
> +}
> +
> +static int efi_runtime_close(struct inode *inode, struct file *file)
> +{
> +       return 0;
> +}
> +
> +/*
> + *     The various file operations we support.
> + */
> +static const struct file_operations efi_runtime_fops = {
> +       .owner          = THIS_MODULE,
> +       .unlocked_ioctl = efi_runtime_ioctl,
> +       .open           = efi_runtime_open,
> +       .release        = efi_runtime_close,
> +       .llseek         = no_llseek,
> +};
> +
> +static struct miscdevice efi_runtime_dev = {
> +       MISC_DYNAMIC_MINOR,
> +       "efi_runtime",
> +       &efi_runtime_fops
> +};
> +
> +static int __init efi_runtime_init(void)
> +{
> +       int ret;
> +
> +       printk(KERN_INFO "EFI_RUNTIME Driver v%s\n", EFI_FWTS_EFI_VERSION);
> +
> +       ret = misc_register(&efi_runtime_dev);
> +       if (ret) {
> +               printk(KERN_ERR "efi_runtime: can't misc_register on minor=%d\n",
> +                               MISC_DYNAMIC_MINOR);
> +               return ret;
> +       }
> +
> +       return 0;
> +}
> +
> +static void __exit efi_runtime_exit(void)
> +{
> +       printk(KERN_INFO "EFI_RUNTIME Driver Exit.\n");
> +       misc_deregister(&efi_runtime_dev);
> +}
> +
> +module_init(efi_runtime_init);
> +module_exit(efi_runtime_exit);
> +
> diff --git a/efi_runtime/efi_runtime.h b/efi_runtime/efi_runtime.h
> new file mode 100644
> index 0000000..7387406
> --- /dev/null
> +++ b/efi_runtime/efi_runtime.h
> @@ -0,0 +1,119 @@
> +/*
> + * EFI Runtime driver
> + *
> + * Copyright(C) 2012 Canonical Ltd.
> + *
> + *  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
> + */
> +
> +#ifndef _EFI_RUNTIME_H_
> +#define _EFI_RUNTIME_H_
> +
> +typedef struct {
> +       uint32_t        Data1;
> +       uint16_t        Data2;
> +       uint16_t        Data3;
> +       uint8_t         Data4[8];
> +} __attribute__ ((packed)) EFI_GUID;
> +
> +typedef struct {
> +       uint16_t        Year;           /* 1900 – 9999 */
> +       uint8_t         Month;          /* 1 – 12 */
> +       uint8_t         Day;            /* 1 – 31 */
> +       uint8_t         Hour;           /* 0 – 23 */
> +       uint8_t         Minute;         /* 0 – 59 */
> +       uint8_t         Second;         /* 0 – 59 */
> +       uint8_t         Pad1;
> +       uint32_t        Nanosecond;     /* 0 – 999,999,999 */
> +       int16_t         TimeZone;       /* -1440 to 1440 or 2047 */
> +       uint8_t         Daylight;
> +       uint8_t         Pad2;
> +} __attribute__ ((packed)) EFI_TIME;
> +
> +typedef struct {
> +       uint32_t        Resolution;
> +       uint32_t        Accuracy;
> +       uint8_t         SetsToZero;
> +} __attribute__ ((packed)) EFI_TIME_CAPABILITIES;
> +
> +struct efi_getvariable {
> +       uint16_t        *VariableName;
> +       EFI_GUID        *VendorGuid;
> +       uint32_t        *Attributes;
> +       uint64_t        *DataSize;
> +       void            *Data;
> +       uint64_t        *status;
> +} __attribute__ ((packed));
> +
> +struct efi_setvariable {
> +       uint16_t        *VariableName;
> +       EFI_GUID        *VendorGuid;
> +       uint32_t        Attributes;
> +       uint64_t        DataSize;
> +       void            *Data;
> +       uint64_t        *status;
> +} __attribute__ ((packed));
> +
> +struct efi_getnextvariablename {
> +       uint64_t        *VariableNameSize;
> +       uint16_t        *VariableName;
> +       EFI_GUID        *VendorGuid;
> +       uint64_t        *status;
> +} __attribute__ ((packed));
> +
> +struct efi_gettime {
> +       EFI_TIME                *Time;
> +       EFI_TIME_CAPABILITIES   *Capabilities;
> +       uint64_t                *status;
> +} __attribute__ ((packed));
> +
> +struct efi_settime {
> +       EFI_TIME                *Time;
> +       uint64_t                *status;
> +} __attribute__ ((packed));
> +
> +struct efi_getwakeuptime {
> +       uint8_t         *Enabled;
> +       uint8_t         *Pending;
> +       EFI_TIME        *Time;
> +       uint64_t        *status;
> +} __attribute__ ((packed));
> +
> +struct efi_setwakeuptime {
> +       uint8_t         Enabled;
> +       EFI_TIME        *Time;
> +       uint64_t        *status;
> +} __attribute__ ((packed));
> +
> +/* ioctl calls that are permitted to the /dev/efi_runtime interface. */
> +#define EFI_RUNTIME_GET_VARIABLE \
> +       _IOWR('p', 0x01, struct efi_getvariable)
> +#define EFI_RUNTIME_SET_VARIABLE \
> +       _IOW('p', 0x02, struct efi_setvariable)
> +
> +#define EFI_RUNTIME_GET_TIME \
> +       _IOR('p', 0x03, struct efi_gettime)
> +#define EFI_RUNTIME_SET_TIME \
> +       _IOW('p', 0x04, struct efi_settime)
> +
> +#define EFI_RUNTIME_GET_WAKETIME \
> +       _IOR('p', 0x05, struct efi_getwakeuptime)
> +#define EFI_RUNTIME_SET_WAKETIME \
> +       _IOW('p', 0x06, struct efi_setwakeuptime)
> +
> +#define EFI_RUNTIME_GET_NEXTVARIABLENAME \
> +       _IOWR('p', 0x07, struct efi_getnextvariablename)
> +
> +#endif /* _EFI_RUNTIME_H_ */
> --
> 1.7.9.5
>

Thanks for the patch. :-)

Acked-by: Keng-Yu Lin <kengyu@canonical.com>
Alex Hung - Sept. 28, 2012, 3:36 a.m.
On 09/21/2012 05:14 PM, Ivan Hu wrote:
> efi_runtime kernel driver provides the runtime UEFI interfaces for fwts
> to test the UEFI runtime service implementiation.
> Current capabilities:
> * provide the RT service interfaces:
>     * GetVariable
>     * SetVariable
>     * GetTime
>     * SetTime
>     * GetWakeupTime
>     * SetWakeupTime
>     * GetNextVariableName
>
> Signed-off-by: Ivan Hu <ivan.hu@canonical.com>
> ---
>   efi_runtime/Makefile      |    6 +
>   efi_runtime/efi_runtime.c |  325 +++++++++++++++++++++++++++++++++++++++++++++
>   efi_runtime/efi_runtime.h |  119 +++++++++++++++++
>   3 files changed, 450 insertions(+)
>   create mode 100644 efi_runtime/Makefile
>   create mode 100644 efi_runtime/efi_runtime.c
>   create mode 100644 efi_runtime/efi_runtime.h
>
> diff --git a/efi_runtime/Makefile b/efi_runtime/Makefile
> new file mode 100644
> index 0000000..8ed7dea
> --- /dev/null
> +++ b/efi_runtime/Makefile
> @@ -0,0 +1,6 @@
> +obj-m += efi_runtime.o
> +all:
> +	make -C /lib/modules/`uname -r`/build M=`pwd` modules
> +
> +clean:
> +	make -C /lib/modules/`uname -r`/build M=`pwd` clean
> diff --git a/efi_runtime/efi_runtime.c b/efi_runtime/efi_runtime.c
> new file mode 100644
> index 0000000..7d99fbc
> --- /dev/null
> +++ b/efi_runtime/efi_runtime.c
> @@ -0,0 +1,325 @@
> +/*
> + * EFI Runtime driver
> + *
> + * Copyright(C) 2012 Canonical Ltd.
> + *
> + *  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/miscdevice.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/proc_fs.h>
> +#include <linux/efi.h>
> +
> +#include <linux/uaccess.h>
> +
> +#include "efi_runtime.h"
> +
> +#define EFI_FWTS_EFI_VERSION	"0.1"
> +
> +MODULE_AUTHOR("Ivan Hu");
> +MODULE_DESCRIPTION("EFI Runtime Driver");
> +MODULE_LICENSE("GPL");
> +
> +static void convert_from_efi_time(efi_time_t *eft, EFI_TIME *time)
> +{
> +	memset(time, 0, sizeof(EFI_TIME));
> +	time->Year = eft->year;
> +	time->Month = eft->month;
> +	time->Day  = eft->day;
> +	time->Hour = eft->hour;
> +	time->Minute = eft->minute;
> +	time->Second  = eft->second;
> +	time->Pad1 = eft->pad1;
> +	time->Nanosecond = eft->nanosecond;
> +	time->TimeZone = eft->timezone;
> +	time->Daylight = eft->daylight;
> +	time->Pad2 = eft->pad2;
> +}
> +
> +static void convert_to_efi_time(efi_time_t *eft, EFI_TIME *time)
> +{
> +	memset(eft, 0, sizeof(eft));
> +	eft->year = time->Year;
> +	eft->month = time->Month;
> +	eft->day = time->Day;
> +	eft->hour = time->Hour;
> +	eft->minute = time->Minute;
> +	eft->second = time->Second;
> +	eft->pad1 = time->Pad1;
> +	eft->nanosecond = time->Nanosecond;
> +	eft->timezone = time->TimeZone;
> +	eft->daylight = time->Daylight;
> +	eft->pad2 = time->Pad2;
> +}
> +
> +static void convert_from_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
> +{
> +	int i;
> +	for (i = 0; i < 16; i++) {
> +		if (i < 4)
> +			vendor->b[i] = (vendor_guid->Data1 >> (8*i)) & 0xff;
> +		else if (i < 6)
> +			vendor->b[i] = (vendor_guid->Data2 >> (8*(i-4))) & 0xff;
> +		else if (i < 8)
> +			vendor->b[i] = (vendor_guid->Data3 >> (8*(i-6))) & 0xff;
> +		else
> +			vendor->b[i] = (vendor_guid->Data4[i-8]);
> +	}
> +}
> +
> +static void convert_to_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
> +{
> +	int i;
> +	vendor_guid->Data1 = vendor->b[0] + (vendor->b[1] << 8) +
> +				(vendor->b[2] << 16) + (vendor->b[3] << 24);
> +	vendor_guid->Data2 = vendor->b[4] + (vendor->b[5] << 8);
> +	vendor_guid->Data3 = vendor->b[6] + (vendor->b[7] << 8);
> +	for (i = 0; i < 8; i++)
> +		vendor_guid->Data4[i] = vendor->b[i+8];
> +}
> +
> +static long efi_runtime_ioctl(struct file *file, unsigned int cmd,
> +							unsigned long arg)
> +{
> +	efi_status_t status;
> +	struct efi_getvariable __user *pgetvariable;
> +	struct efi_setvariable __user *psetvariable;
> +
> +	efi_guid_t vendor;
> +	EFI_GUID vendor_guid;
> +	unsigned long datasize;
> +	uint32_t attr;
> +
> +	efi_time_t eft;
> +	efi_time_cap_t cap;
> +	struct efi_gettime __user *pgettime;
> +	struct efi_settime __user *psettime;
> +
> +	unsigned char enabled, pending;
> +	EFI_TIME efi_time;
> +	struct efi_getwakeuptime __user *pgetwakeuptime;
> +	struct efi_setwakeuptime __user *psetwakeuptime;
> +
> +	struct efi_getnextvariablename __user *pgetnextvariablename;
> +	unsigned long name_size;
> +
> +	switch (cmd) {
> +	case EFI_RUNTIME_GET_VARIABLE:
> +		pgetvariable = (struct efi_getvariable __user *)arg;
> +
> +		if (get_user(datasize, pgetvariable->DataSize) ||
> +			copy_from_user(&vendor_guid, pgetvariable->VendorGuid,
> +							sizeof(EFI_GUID)))
> +			return -EFAULT;
> +
> +		convert_from_guid(&vendor, &vendor_guid);
> +		status = efi.get_variable(pgetvariable->VariableName, &vendor,
> +					&attr, &datasize, pgetvariable->Data);
> +		if (put_user(status, pgetvariable->status))
> +			return -EFAULT;
> +		if (status == EFI_SUCCESS) {
> +			if (put_user(attr, pgetvariable->Attributes) ||
> +				put_user(datasize, pgetvariable->DataSize))
> +				return -EFAULT;
> +			return 0;
> +		} else {
> +			printk(KERN_ERR "efi_runtime: can't get variable\n");
> +			return -EINVAL;
> +		}
> +
> +	case EFI_RUNTIME_SET_VARIABLE:
> +		psetvariable = (struct efi_setvariable __user *)arg;
> +		if (get_user(datasize, &psetvariable->DataSize) ||
> +			get_user(attr, &psetvariable->Attributes) ||
> +			copy_from_user(&vendor_guid, psetvariable->VendorGuid,
> +							sizeof(EFI_GUID)))
> +			return -EFAULT;
> +
> +		convert_from_guid(&vendor, &vendor_guid);
> +		status = efi.set_variable(psetvariable->VariableName, &vendor,
> +					attr, datasize, psetvariable->Data);
> +
> +		if (put_user(status, psetvariable->status))
> +			return -EFAULT;
> +		return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +	case EFI_RUNTIME_GET_TIME:
> +		status = efi.get_time(&eft, &cap);
> +		pgettime = (struct efi_gettime __user *)arg;
> +		if (put_user(status, pgettime->status))
> +			return -EFAULT;
> +		if (status != EFI_SUCCESS) {
> +			printk(KERN_ERR "efitime: can't read time\n");
> +			return -EINVAL;
> +		}
> +		if (put_user(cap.resolution,
> +					&pgettime->Capabilities->Resolution) ||
> +					put_user(cap.accuracy,
> +					&pgettime->Capabilities->Accuracy) ||
> +					put_user(cap.sets_to_zero,
> +					&pgettime->Capabilities->SetsToZero))
> +			return -EFAULT;
> +		return copy_to_user(pgettime->Time, &eft,
> +				sizeof(EFI_TIME)) ? -EFAULT : 0;
> +
> +	case EFI_RUNTIME_SET_TIME:
> +
> +		psettime = (struct efi_settime __user *)arg;
> +		if (copy_from_user(&efi_time, psettime->Time,
> +						sizeof(EFI_TIME)))
> +			return -EFAULT;
> +		convert_to_efi_time(&eft, &efi_time);
> +		status = efi.set_time(&eft);
> +
> +		if (put_user(status, psettime->status))
> +			return -EFAULT;
> +
> +		return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +	case EFI_RUNTIME_GET_WAKETIME:
> +
> +		status = efi.get_wakeup_time((efi_bool_t *)&enabled,
> +						(efi_bool_t *)&pending, &eft);
> +
> +		pgetwakeuptime = (struct efi_getwakeuptime __user *)arg;
> +
> +		if (put_user(status, pgetwakeuptime->status))
> +			return -EFAULT;
> +		if (status != EFI_SUCCESS)
> +			return -EINVAL;
> +
> +		if (put_user(enabled, pgetwakeuptime->Enabled) ||
> +				put_user(pending, pgetwakeuptime->Pending))
> +			return -EFAULT;
> +
> +		convert_from_efi_time(&eft, &efi_time);
> +
> +		return copy_to_user(pgetwakeuptime->Time, &efi_time,
> +				sizeof(EFI_TIME)) ? -EFAULT : 0;
> +
> +	case EFI_RUNTIME_SET_WAKETIME:
> +
> +		psetwakeuptime = (struct efi_setwakeuptime __user *)arg;
> +
> +		if (get_user(enabled, &psetwakeuptime->Enabled) ||
> +					copy_from_user(&efi_time,
> +					psetwakeuptime->Time,
> +					sizeof(EFI_TIME)))
> +			return -EFAULT;
> +
> +		convert_to_efi_time(&eft, &efi_time);
> +
> +		status = efi.set_wakeup_time(enabled, &eft);
> +
> +		if (put_user(status, psetwakeuptime->status))
> +			return -EFAULT;
> +
> +		return status == EFI_SUCCESS ? 0 : -EINVAL;
> +
> +	case EFI_RUNTIME_GET_NEXTVARIABLENAME:
> +
> +		pgetnextvariablename = (struct efi_getnextvariablename
> +								__user *)arg;
> +
> +		if (get_user(name_size, pgetnextvariablename->VariableNameSize)
> +				|| copy_from_user(&vendor_guid,
> +					pgetnextvariablename->VendorGuid,
> +					sizeof(EFI_GUID)))
> +			return -EFAULT;
> +		if (name_size > 1024)
> +			return -EFAULT;
> +
> +		convert_from_guid(&vendor, &vendor_guid);
> +
> +		status = efi.get_next_variable(&name_size,
> +					pgetnextvariablename->VariableName,
> +								&vendor);
> +		if (put_user(status, pgetnextvariablename->status))
> +			return -EFAULT;
> +		if (status != EFI_SUCCESS)
> +			return -EINVAL;
> +		convert_to_guid(&vendor, &vendor_guid);
> +
> +		if (put_user(name_size, pgetnextvariablename->VariableNameSize))
> +			return -EFAULT;
> +
> +		if (copy_to_user(pgetnextvariablename->VendorGuid,
> +						&vendor_guid, sizeof(EFI_GUID)))
> +			return -EFAULT;
> +		return 0;
> +	}
> +
> +	return -ENOTTY;
> +}
> +
> +static int efi_runtime_open(struct inode *inode, struct file *file)
> +{
> +	/*
> +	 * nothing special to do here
> +	 * We do accept multiple open files at the same time as we
> +	 * synchronize on the per call operation.
> +	 */
> +	return 0;
> +}
> +
> +static int efi_runtime_close(struct inode *inode, struct file *file)
> +{
> +	return 0;
> +}
> +
> +/*
> + *	The various file operations we support.
> + */
> +static const struct file_operations efi_runtime_fops = {
> +	.owner		= THIS_MODULE,
> +	.unlocked_ioctl	= efi_runtime_ioctl,
> +	.open		= efi_runtime_open,
> +	.release	= efi_runtime_close,
> +	.llseek		= no_llseek,
> +};
> +
> +static struct miscdevice efi_runtime_dev = {
> +	MISC_DYNAMIC_MINOR,
> +	"efi_runtime",
> +	&efi_runtime_fops
> +};
> +
> +static int __init efi_runtime_init(void)
> +{
> +	int ret;
> +
> +	printk(KERN_INFO "EFI_RUNTIME Driver v%s\n", EFI_FWTS_EFI_VERSION);
> +
> +	ret = misc_register(&efi_runtime_dev);
> +	if (ret) {
> +		printk(KERN_ERR "efi_runtime: can't misc_register on minor=%d\n",
> +				MISC_DYNAMIC_MINOR);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static void __exit efi_runtime_exit(void)
> +{
> +	printk(KERN_INFO "EFI_RUNTIME Driver Exit.\n");
> +	misc_deregister(&efi_runtime_dev);
> +}
> +
> +module_init(efi_runtime_init);
> +module_exit(efi_runtime_exit);
> +
> diff --git a/efi_runtime/efi_runtime.h b/efi_runtime/efi_runtime.h
> new file mode 100644
> index 0000000..7387406
> --- /dev/null
> +++ b/efi_runtime/efi_runtime.h
> @@ -0,0 +1,119 @@
> +/*
> + * EFI Runtime driver
> + *
> + * Copyright(C) 2012 Canonical Ltd.
> + *
> + *  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
> + */
> +
> +#ifndef _EFI_RUNTIME_H_
> +#define _EFI_RUNTIME_H_
> +
> +typedef struct {
> +	uint32_t	Data1;
> +	uint16_t	Data2;
> +	uint16_t	Data3;
> +	uint8_t		Data4[8];
> +} __attribute__ ((packed)) EFI_GUID;
> +
> +typedef struct {
> +	uint16_t	Year;		/* 1900 – 9999 */
> +	uint8_t		Month;		/* 1 – 12 */
> +	uint8_t		Day;		/* 1 – 31 */
> +	uint8_t		Hour;		/* 0 – 23 */
> +	uint8_t		Minute;		/* 0 – 59 */
> +	uint8_t		Second;		/* 0 – 59 */
> +	uint8_t		Pad1;
> +	uint32_t	Nanosecond;	/* 0 – 999,999,999 */
> +	int16_t		TimeZone;	/* -1440 to 1440 or 2047 */
> +	uint8_t		Daylight;
> +	uint8_t		Pad2;
> +} __attribute__ ((packed)) EFI_TIME;
> +
> +typedef struct {
> +	uint32_t	Resolution;
> +	uint32_t	Accuracy;
> +	uint8_t		SetsToZero;
> +} __attribute__ ((packed)) EFI_TIME_CAPABILITIES;
> +
> +struct efi_getvariable {
> +	uint16_t	*VariableName;
> +	EFI_GUID	*VendorGuid;
> +	uint32_t	*Attributes;
> +	uint64_t	*DataSize;
> +	void		*Data;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_setvariable {
> +	uint16_t	*VariableName;
> +	EFI_GUID	*VendorGuid;
> +	uint32_t	Attributes;
> +	uint64_t	DataSize;
> +	void		*Data;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_getnextvariablename {
> +	uint64_t	*VariableNameSize;
> +	uint16_t	*VariableName;
> +	EFI_GUID	*VendorGuid;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_gettime {
> +	EFI_TIME		*Time;
> +	EFI_TIME_CAPABILITIES	*Capabilities;
> +	uint64_t		*status;
> +} __attribute__ ((packed));
> +
> +struct efi_settime {
> +	EFI_TIME		*Time;
> +	uint64_t		*status;
> +} __attribute__ ((packed));
> +
> +struct efi_getwakeuptime {
> +	uint8_t		*Enabled;
> +	uint8_t		*Pending;
> +	EFI_TIME	*Time;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +struct efi_setwakeuptime {
> +	uint8_t		Enabled;
> +	EFI_TIME	*Time;
> +	uint64_t	*status;
> +} __attribute__ ((packed));
> +
> +/* ioctl calls that are permitted to the /dev/efi_runtime interface. */
> +#define EFI_RUNTIME_GET_VARIABLE \
> +	_IOWR('p', 0x01, struct efi_getvariable)
> +#define EFI_RUNTIME_SET_VARIABLE \
> +	_IOW('p', 0x02, struct efi_setvariable)
> +
> +#define EFI_RUNTIME_GET_TIME \
> +	_IOR('p', 0x03, struct efi_gettime)
> +#define EFI_RUNTIME_SET_TIME \
> +	_IOW('p', 0x04, struct efi_settime)
> +
> +#define EFI_RUNTIME_GET_WAKETIME \
> +	_IOR('p', 0x05, struct efi_getwakeuptime)
> +#define EFI_RUNTIME_SET_WAKETIME \
> +	_IOW('p', 0x06, struct efi_setwakeuptime)
> +
> +#define EFI_RUNTIME_GET_NEXTVARIABLENAME \
> +	_IOWR('p', 0x07, struct efi_getnextvariablename)
> +
> +#endif /* _EFI_RUNTIME_H_ */
>
Acked-by: Alex Hung <alex.hung@canonical.com>

Patch

diff --git a/efi_runtime/Makefile b/efi_runtime/Makefile
new file mode 100644
index 0000000..8ed7dea
--- /dev/null
+++ b/efi_runtime/Makefile
@@ -0,0 +1,6 @@ 
+obj-m += efi_runtime.o
+all:
+	make -C /lib/modules/`uname -r`/build M=`pwd` modules
+
+clean:
+	make -C /lib/modules/`uname -r`/build M=`pwd` clean
diff --git a/efi_runtime/efi_runtime.c b/efi_runtime/efi_runtime.c
new file mode 100644
index 0000000..7d99fbc
--- /dev/null
+++ b/efi_runtime/efi_runtime.c
@@ -0,0 +1,325 @@ 
+/*
+ * EFI Runtime driver
+ *
+ * Copyright(C) 2012 Canonical Ltd.
+ *
+ *  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/miscdevice.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <linux/efi.h>
+
+#include <linux/uaccess.h>
+
+#include "efi_runtime.h"
+
+#define EFI_FWTS_EFI_VERSION	"0.1"
+
+MODULE_AUTHOR("Ivan Hu");
+MODULE_DESCRIPTION("EFI Runtime Driver");
+MODULE_LICENSE("GPL");
+
+static void convert_from_efi_time(efi_time_t *eft, EFI_TIME *time)
+{
+	memset(time, 0, sizeof(EFI_TIME));
+	time->Year = eft->year;
+	time->Month = eft->month;
+	time->Day  = eft->day;
+	time->Hour = eft->hour;
+	time->Minute = eft->minute;
+	time->Second  = eft->second;
+	time->Pad1 = eft->pad1;
+	time->Nanosecond = eft->nanosecond;
+	time->TimeZone = eft->timezone;
+	time->Daylight = eft->daylight;
+	time->Pad2 = eft->pad2;
+}
+
+static void convert_to_efi_time(efi_time_t *eft, EFI_TIME *time)
+{
+	memset(eft, 0, sizeof(eft));
+	eft->year = time->Year;
+	eft->month = time->Month;
+	eft->day = time->Day;
+	eft->hour = time->Hour;
+	eft->minute = time->Minute;
+	eft->second = time->Second;
+	eft->pad1 = time->Pad1;
+	eft->nanosecond = time->Nanosecond;
+	eft->timezone = time->TimeZone;
+	eft->daylight = time->Daylight;
+	eft->pad2 = time->Pad2;
+}
+
+static void convert_from_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
+{
+	int i;
+	for (i = 0; i < 16; i++) {
+		if (i < 4)
+			vendor->b[i] = (vendor_guid->Data1 >> (8*i)) & 0xff;
+		else if (i < 6)
+			vendor->b[i] = (vendor_guid->Data2 >> (8*(i-4))) & 0xff;
+		else if (i < 8)
+			vendor->b[i] = (vendor_guid->Data3 >> (8*(i-6))) & 0xff;
+		else
+			vendor->b[i] = (vendor_guid->Data4[i-8]);
+	}
+}
+
+static void convert_to_guid(efi_guid_t *vendor, EFI_GUID *vendor_guid)
+{
+	int i;
+	vendor_guid->Data1 = vendor->b[0] + (vendor->b[1] << 8) +
+				(vendor->b[2] << 16) + (vendor->b[3] << 24);
+	vendor_guid->Data2 = vendor->b[4] + (vendor->b[5] << 8);
+	vendor_guid->Data3 = vendor->b[6] + (vendor->b[7] << 8);
+	for (i = 0; i < 8; i++)
+		vendor_guid->Data4[i] = vendor->b[i+8];
+}
+
+static long efi_runtime_ioctl(struct file *file, unsigned int cmd,
+							unsigned long arg)
+{
+	efi_status_t status;
+	struct efi_getvariable __user *pgetvariable;
+	struct efi_setvariable __user *psetvariable;
+
+	efi_guid_t vendor;
+	EFI_GUID vendor_guid;
+	unsigned long datasize;
+	uint32_t attr;
+
+	efi_time_t eft;
+	efi_time_cap_t cap;
+	struct efi_gettime __user *pgettime;
+	struct efi_settime __user *psettime;
+
+	unsigned char enabled, pending;
+	EFI_TIME efi_time;
+	struct efi_getwakeuptime __user *pgetwakeuptime;
+	struct efi_setwakeuptime __user *psetwakeuptime;
+
+	struct efi_getnextvariablename __user *pgetnextvariablename;
+	unsigned long name_size;
+
+	switch (cmd) {
+	case EFI_RUNTIME_GET_VARIABLE:
+		pgetvariable = (struct efi_getvariable __user *)arg;
+
+		if (get_user(datasize, pgetvariable->DataSize) ||
+			copy_from_user(&vendor_guid, pgetvariable->VendorGuid,
+							sizeof(EFI_GUID)))
+			return -EFAULT;
+
+		convert_from_guid(&vendor, &vendor_guid);
+		status = efi.get_variable(pgetvariable->VariableName, &vendor,
+					&attr, &datasize, pgetvariable->Data);
+		if (put_user(status, pgetvariable->status))
+			return -EFAULT;
+		if (status == EFI_SUCCESS) {
+			if (put_user(attr, pgetvariable->Attributes) ||
+				put_user(datasize, pgetvariable->DataSize))
+				return -EFAULT;
+			return 0;
+		} else {
+			printk(KERN_ERR "efi_runtime: can't get variable\n");
+			return -EINVAL;
+		}
+
+	case EFI_RUNTIME_SET_VARIABLE:
+		psetvariable = (struct efi_setvariable __user *)arg;
+		if (get_user(datasize, &psetvariable->DataSize) ||
+			get_user(attr, &psetvariable->Attributes) ||
+			copy_from_user(&vendor_guid, psetvariable->VendorGuid,
+							sizeof(EFI_GUID)))
+			return -EFAULT;
+
+		convert_from_guid(&vendor, &vendor_guid);
+		status = efi.set_variable(psetvariable->VariableName, &vendor,
+					attr, datasize, psetvariable->Data);
+
+		if (put_user(status, psetvariable->status))
+			return -EFAULT;
+		return status == EFI_SUCCESS ? 0 : -EINVAL;
+
+	case EFI_RUNTIME_GET_TIME:
+		status = efi.get_time(&eft, &cap);
+		pgettime = (struct efi_gettime __user *)arg;
+		if (put_user(status, pgettime->status))
+			return -EFAULT;
+		if (status != EFI_SUCCESS) {
+			printk(KERN_ERR "efitime: can't read time\n");
+			return -EINVAL;
+		}
+		if (put_user(cap.resolution,
+					&pgettime->Capabilities->Resolution) ||
+					put_user(cap.accuracy,
+					&pgettime->Capabilities->Accuracy) ||
+					put_user(cap.sets_to_zero,
+					&pgettime->Capabilities->SetsToZero))
+			return -EFAULT;
+		return copy_to_user(pgettime->Time, &eft,
+				sizeof(EFI_TIME)) ? -EFAULT : 0;
+
+	case EFI_RUNTIME_SET_TIME:
+
+		psettime = (struct efi_settime __user *)arg;
+		if (copy_from_user(&efi_time, psettime->Time,
+						sizeof(EFI_TIME)))
+			return -EFAULT;
+		convert_to_efi_time(&eft, &efi_time);
+		status = efi.set_time(&eft);
+
+		if (put_user(status, psettime->status))
+			return -EFAULT;
+
+		return status == EFI_SUCCESS ? 0 : -EINVAL;
+
+	case EFI_RUNTIME_GET_WAKETIME:
+
+		status = efi.get_wakeup_time((efi_bool_t *)&enabled,
+						(efi_bool_t *)&pending, &eft);
+
+		pgetwakeuptime = (struct efi_getwakeuptime __user *)arg;
+
+		if (put_user(status, pgetwakeuptime->status))
+			return -EFAULT;
+		if (status != EFI_SUCCESS)
+			return -EINVAL;
+
+		if (put_user(enabled, pgetwakeuptime->Enabled) ||
+				put_user(pending, pgetwakeuptime->Pending))
+			return -EFAULT;
+
+		convert_from_efi_time(&eft, &efi_time);
+
+		return copy_to_user(pgetwakeuptime->Time, &efi_time,
+				sizeof(EFI_TIME)) ? -EFAULT : 0;
+
+	case EFI_RUNTIME_SET_WAKETIME:
+
+		psetwakeuptime = (struct efi_setwakeuptime __user *)arg;
+
+		if (get_user(enabled, &psetwakeuptime->Enabled) ||
+					copy_from_user(&efi_time,
+					psetwakeuptime->Time,
+					sizeof(EFI_TIME)))
+			return -EFAULT;
+
+		convert_to_efi_time(&eft, &efi_time);
+
+		status = efi.set_wakeup_time(enabled, &eft);
+
+		if (put_user(status, psetwakeuptime->status))
+			return -EFAULT;
+
+		return status == EFI_SUCCESS ? 0 : -EINVAL;
+
+	case EFI_RUNTIME_GET_NEXTVARIABLENAME:
+
+		pgetnextvariablename = (struct efi_getnextvariablename
+								__user *)arg;
+
+		if (get_user(name_size, pgetnextvariablename->VariableNameSize)
+				|| copy_from_user(&vendor_guid,
+					pgetnextvariablename->VendorGuid,
+					sizeof(EFI_GUID)))
+			return -EFAULT;
+		if (name_size > 1024)
+			return -EFAULT;
+
+		convert_from_guid(&vendor, &vendor_guid);
+
+		status = efi.get_next_variable(&name_size,
+					pgetnextvariablename->VariableName,
+								&vendor);
+		if (put_user(status, pgetnextvariablename->status))
+			return -EFAULT;
+		if (status != EFI_SUCCESS)
+			return -EINVAL;
+		convert_to_guid(&vendor, &vendor_guid);
+
+		if (put_user(name_size, pgetnextvariablename->VariableNameSize))
+			return -EFAULT;
+
+		if (copy_to_user(pgetnextvariablename->VendorGuid,
+						&vendor_guid, sizeof(EFI_GUID)))
+			return -EFAULT;
+		return 0;
+	}
+
+	return -ENOTTY;
+}
+
+static int efi_runtime_open(struct inode *inode, struct file *file)
+{
+	/*
+	 * nothing special to do here
+	 * We do accept multiple open files at the same time as we
+	 * synchronize on the per call operation.
+	 */
+	return 0;
+}
+
+static int efi_runtime_close(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+/*
+ *	The various file operations we support.
+ */
+static const struct file_operations efi_runtime_fops = {
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl	= efi_runtime_ioctl,
+	.open		= efi_runtime_open,
+	.release	= efi_runtime_close,
+	.llseek		= no_llseek,
+};
+
+static struct miscdevice efi_runtime_dev = {
+	MISC_DYNAMIC_MINOR,
+	"efi_runtime",
+	&efi_runtime_fops
+};
+
+static int __init efi_runtime_init(void)
+{
+	int ret;
+
+	printk(KERN_INFO "EFI_RUNTIME Driver v%s\n", EFI_FWTS_EFI_VERSION);
+
+	ret = misc_register(&efi_runtime_dev);
+	if (ret) {
+		printk(KERN_ERR "efi_runtime: can't misc_register on minor=%d\n",
+				MISC_DYNAMIC_MINOR);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void __exit efi_runtime_exit(void)
+{
+	printk(KERN_INFO "EFI_RUNTIME Driver Exit.\n");
+	misc_deregister(&efi_runtime_dev);
+}
+
+module_init(efi_runtime_init);
+module_exit(efi_runtime_exit);
+
diff --git a/efi_runtime/efi_runtime.h b/efi_runtime/efi_runtime.h
new file mode 100644
index 0000000..7387406
--- /dev/null
+++ b/efi_runtime/efi_runtime.h
@@ -0,0 +1,119 @@ 
+/*
+ * EFI Runtime driver
+ *
+ * Copyright(C) 2012 Canonical Ltd.
+ *
+ *  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
+ */
+
+#ifndef _EFI_RUNTIME_H_
+#define _EFI_RUNTIME_H_
+
+typedef struct {
+	uint32_t	Data1;
+	uint16_t	Data2;
+	uint16_t	Data3;
+	uint8_t		Data4[8];
+} __attribute__ ((packed)) EFI_GUID;
+
+typedef struct {
+	uint16_t	Year;		/* 1900 – 9999 */
+	uint8_t		Month;		/* 1 – 12 */
+	uint8_t		Day;		/* 1 – 31 */
+	uint8_t		Hour;		/* 0 – 23 */
+	uint8_t		Minute;		/* 0 – 59 */
+	uint8_t		Second;		/* 0 – 59 */
+	uint8_t		Pad1;
+	uint32_t	Nanosecond;	/* 0 – 999,999,999 */
+	int16_t		TimeZone;	/* -1440 to 1440 or 2047 */
+	uint8_t		Daylight;
+	uint8_t		Pad2;
+} __attribute__ ((packed)) EFI_TIME;
+
+typedef struct {
+	uint32_t	Resolution;
+	uint32_t	Accuracy;
+	uint8_t		SetsToZero;
+} __attribute__ ((packed)) EFI_TIME_CAPABILITIES;
+
+struct efi_getvariable {
+	uint16_t	*VariableName;
+	EFI_GUID	*VendorGuid;
+	uint32_t	*Attributes;
+	uint64_t	*DataSize;
+	void		*Data;
+	uint64_t	*status;
+} __attribute__ ((packed));
+
+struct efi_setvariable {
+	uint16_t	*VariableName;
+	EFI_GUID	*VendorGuid;
+	uint32_t	Attributes;
+	uint64_t	DataSize;
+	void		*Data;
+	uint64_t	*status;
+} __attribute__ ((packed));
+
+struct efi_getnextvariablename {
+	uint64_t	*VariableNameSize;
+	uint16_t	*VariableName;
+	EFI_GUID	*VendorGuid;
+	uint64_t	*status;
+} __attribute__ ((packed));
+
+struct efi_gettime {
+	EFI_TIME		*Time;
+	EFI_TIME_CAPABILITIES	*Capabilities;
+	uint64_t		*status;
+} __attribute__ ((packed));
+
+struct efi_settime {
+	EFI_TIME		*Time;
+	uint64_t		*status;
+} __attribute__ ((packed));
+
+struct efi_getwakeuptime {
+	uint8_t		*Enabled;
+	uint8_t		*Pending;
+	EFI_TIME	*Time;
+	uint64_t	*status;
+} __attribute__ ((packed));
+
+struct efi_setwakeuptime {
+	uint8_t		Enabled;
+	EFI_TIME	*Time;
+	uint64_t	*status;
+} __attribute__ ((packed));
+
+/* ioctl calls that are permitted to the /dev/efi_runtime interface. */
+#define EFI_RUNTIME_GET_VARIABLE \
+	_IOWR('p', 0x01, struct efi_getvariable)
+#define EFI_RUNTIME_SET_VARIABLE \
+	_IOW('p', 0x02, struct efi_setvariable)
+
+#define EFI_RUNTIME_GET_TIME \
+	_IOR('p', 0x03, struct efi_gettime)
+#define EFI_RUNTIME_SET_TIME \
+	_IOW('p', 0x04, struct efi_settime)
+
+#define EFI_RUNTIME_GET_WAKETIME \
+	_IOR('p', 0x05, struct efi_getwakeuptime)
+#define EFI_RUNTIME_SET_WAKETIME \
+	_IOW('p', 0x06, struct efi_setwakeuptime)
+
+#define EFI_RUNTIME_GET_NEXTVARIABLENAME \
+	_IOWR('p', 0x07, struct efi_getnextvariablename)
+
+#endif /* _EFI_RUNTIME_H_ */