19 October 1999
Michael Elizabeth Chastain <[email protected]>
If you are adding new ioctl's to the kernel, you should use the _IO macros defined in <linux/ioctl.h>:
_IO an ioctl with no parameters _IOW an ioctl with write parameters (copy_from_user) _IOR an ioctl with read parameters (copy_to_user) _IOWR an ioctl with both write and read parameters.
'Write' and 'read' are from the user's point of view, just like the system calls 'write' and 'read'. For example, a SET_FOO ioctl would be _IOW, although the kernel would actually read data from user space; a GET_FOO ioctl would be _IOR, although the kernel would actually write data to user space.
The first argument to _IO, _IOW, _IOR, or _IOWR is an identifying letter or number from the table below. Because of the large number of drivers, many drivers share a partial letter with other drivers.
If you are writing a driver for a new device and need a letter, pick an unused block with enough room for expansion: 32 to 256 ioctl commands should suffice. You can register the block by patching this file and submitting the patch through :doc:`usual patch submission process </process/submitting-patches>`.
The second argument to _IO, _IOW, _IOR, or _IOWR is a sequence number to distinguish ioctls from each other. The third argument to _IOW, _IOR, or _IOWR is the type of the data going into the kernel or coming out of the kernel (e.g. 'int' or 'struct foo'). NOTE! Do NOT use sizeof(arg) as the third argument as this results in your ioctl thinking it passes an argument of type size_t.
Some devices use their major number as the identifier; this is OK, as long as it is unique. Some devices are irregular and don't follow any convention at all.
Following this convention is good because:
- Keeping the ioctl's globally unique helps error checking: if a program calls an ioctl on the wrong device, it will get an error rather than some unexpected behaviour.
- The 'strace' build procedure automatically finds ioctl numbers defined with _IO, _IOW, _IOR, or _IOWR.
- 'strace' can decode numbers back into useful names when the numbers are unique.
- People looking for ioctls can grep for them more easily when this convention is used to define the ioctl numbers.
- When following the convention, the driver code can use generic code to copy the parameters between user and kernel space.
This table lists ioctls visible from userland, excluding ones from drivers/staging/.
| Code | Seq# (hex) | Include File | Comments |
|---|---|---|---|
| 0x00 | 00-1F | linux/fs.h | conflict! |
| 0x00 | 00-1F | scsi/scsi_ioctl.h | conflict! |
| 0x00 | 00-1F | linux/fb.h | conflict! |
| 0x00 | 00-1F | linux/wavefront.h | conflict! |
| 0x02 | all | linux/fd.h | |
| 0x03 | all | linux/hdreg.h | |
| 0x04 | D2-DC | linux/umsdos_fs.h | Dead since 2.6.11, but don't reuse these. |
| 0x06 | all | linux/lp.h | |
| 0x07 | 9F-D0 | linux/vmw_vmci_defs.h, uapi/linux/vm_sockets.h | |
| 0x09 | all | linux/raid/md_u.h | |
| 0x10 | 00-0F | drivers/char/s390/vmcp.h | |
| 0x10 | 10-1F | arch/s390/include/uapi/sclp_ctl.h | |
| 0x10 | 20-2F | arch/s390/include/uapi/asm/hypfs.h | |
| 0x12 | all | linux/fs.h linux/blkpg.h linux/blkzoned.h linux/blk-crypto.h | BLK* ioctls |
| 0x15 | all | linux/fs.h | FS_IOC_* ioctls |
| 0x1b | all | InfiniBand Subsystem <http://infiniband.sourceforge.net/> | |
| 0x20 | all | drivers/cdrom/cm206.h | |
| 0x22 | all | scsi/sg.h | |
| 0x3E | 00-0F | linux/counter.h | <mailto:[email protected]> |
| '!' | 00-1F | uapi/linux/seccomp.h | |
| '#' | 00-3F | IEEE 1394 Subsystem Block for the entire subsystem | |
| '$' | 00-0F | linux/perf_counter.h, linux/perf_event.h | |
| '%' | 00-0F | include/uapi/linux/stm.h | System Trace Module subsystem <mailto:[email protected]> |
| '&' | 00-07 | drivers/firewire/nosy-user.h | |
| '*' | 00-1F | uapi/linux/user_events.h | User Events Subsystem <mailto:[email protected]> |
| '1' | 00-1F | linux/timepps.h | PPS kit from Ulrich Windl <ftp://ftp.de.kernel.org/pub/linux/daemons/ntp/PPS/> |
| '2' | 01-04 | linux/i2o.h | |
| '3' | 00-0F | drivers/s390/char/raw3270.h | conflict! |
| '3' | 00-1F | linux/suspend_ioctls.h, kernel/power/user.c | conflict! |
| '8' | all | SNP8023 advanced NIC card <mailto:[email protected]> | |
| ';' | 64-7F | linux/vfio.h | |
| ';' | 80-FF | linux/iommufd.h | |
| '=' | 00-3f | uapi/linux/ptp_clock.h | <mailto:[email protected]> |
| '@' | 00-0F | linux/radeonfb.h | conflict! |
| '@' | 00-0F | drivers/video/aty/aty128fb.c | conflict! |
| 'A' | 00-1F | linux/apm_bios.h | conflict! |
| 'A' | 00-0F | linux/agpgart.h, drivers/char/agp/compat_ioctl.h | conflict! |
| 'A' | 00-7F | sound/asound.h | conflict! |
| 'B' | 00-1F | linux/cciss_ioctl.h | conflict! |
| 'B' | 00-0F | include/linux/pmu.h | conflict! |
| 'B' | C0-FF | advanced bbus | <mailto:[email protected]> |
| 'B' | 00-0F | xen/xenbus_dev.h | conflict! |
| 'C' | all | linux/soundcard.h | conflict! |
| 'C' | 01-2F | linux/capi.h | conflict! |
| 'C' | F0-FF | drivers/net/wan/cosa.h | conflict! |
| 'D' | all | arch/s390/include/asm/dasd.h | |
| 'D' | 40-5F | drivers/scsi/dpt/dtpi_ioctl.h | Dead since 2022 |
| 'D' | 05 | drivers/scsi/pmcraid.h | |
| 'E' | all | linux/input.h | conflict! |
| 'E' | 00-0F | xen/evtchn.h | conflict! |
| 'F' | all | linux/fb.h | conflict! |
| 'F' | 01-02 | drivers/scsi/pmcraid.h | conflict! |
| 'F' | 20 | drivers/video/fsl-diu-fb.h | conflict! |
| 'F' | 20 | linux/ivtvfb.h | conflict! |
| 'F' | 20 | linux/matroxfb.h | conflict! |
| 'F' | 20 | drivers/video/aty/atyfb_base.c | conflict! |
| 'F' | 00-0F | video/da8xx-fb.h | conflict! |
| 'F' | 80-8F | linux/arcfb.h | conflict! |
| 'F' | DD | video/sstfb.h | conflict! |
| 'G' | 00-3F | drivers/misc/sgi-gru/grulib.h | conflict! |
| 'G' | 00-0F | xen/gntalloc.h, xen/gntdev.h | conflict! |
| 'H' | 00-7F | linux/hiddev.h | conflict! |
| 'H' | 00-0F | linux/hidraw.h | conflict! |
| 'H' | 01 | linux/mei.h | conflict! |
| 'H' | 02 | linux/mei.h | conflict! |
| 'H' | 03 | linux/mei.h | conflict! |
| 'H' | 00-0F | sound/asound.h | conflict! |
| 'H' | 20-40 | sound/asound_fm.h | conflict! |
| 'H' | 80-8F | sound/sfnt_info.h | conflict! |
| 'H' | 10-8F | sound/emu10k1.h | conflict! |
| 'H' | 10-1F | sound/sb16_csp.h | conflict! |
| 'H' | 10-1F | sound/hda_hwdep.h | conflict! |
| 'H' | 40-4F | sound/hdspm.h | conflict! |
| 'H' | 40-4F | sound/hdsp.h | conflict! |
| 'H' | 90 | sound/usb/usx2y/usb_stream.h | |
| 'H' | 00-0F | uapi/misc/habanalabs.h | conflict! |
| 'H' | A0 | uapi/linux/usb/cdc-wdm.h | |
| 'H' | C0-F0 | net/bluetooth/hci.h | conflict! |
| 'H' | C0-DF | net/bluetooth/hidp/hidp.h | conflict! |
| 'H' | C0-DF | net/bluetooth/cmtp/cmtp.h | conflict! |
| 'H' | C0-DF | net/bluetooth/bnep/bnep.h | conflict! |
| 'H' | F1 | linux/hid-roccat.h | <mailto:[email protected]> |
| 'H' | F8-FA | sound/firewire.h | |
| 'I' | all | linux/isdn.h | conflict! |
| 'I' | 00-0F | drivers/isdn/divert/isdn_divert.h | conflict! |
| 'I' | 40-4F | linux/mISDNif.h | conflict! |
| 'K' | all | linux/kd.h | |
| 'L' | 00-1F | linux/loop.h | conflict! |
| 'L' | 10-1F | drivers/scsi/mpt3sas/mpt3sas_ctl.h | conflict! |
| 'L' | E0-FF | linux/ppdd.h | encrypted disk device driver <http://linux01.gwdg.de/~alatham/ppdd.html> |
| 'M' | all | linux/soundcard.h | conflict! |
| 'M' | 01-16 and | mtd/mtd-abi.h drivers/mtd/mtdchar.c | conflict! |
| 'M' | 01-03 | drivers/scsi/megaraid/megaraid_sas.h | |
| 'M' | 00-0F | drivers/video/fsl-diu-fb.h | conflict! |
| 'N' | 00-1F | drivers/usb/scanner.h | |
| 'N' | 40-7F | drivers/block/nvme.c | |
| 'N' | 80-8F | uapi/linux/ntsync.h | NT synchronization primitives <mailto:[email protected]> |
| 'O' | 00-06 | mtd/ubi-user.h | UBI |
| 'P' | all | linux/soundcard.h | conflict! |
| 'P' | 60-6F | sound/sscape_ioctl.h | conflict! |
| 'P' | 00-0F | drivers/usb/class/usblp.c | conflict! |
| 'P' | 01-09 | drivers/misc/pci_endpoint_test.c | conflict! |
| 'P' | 00-0F | xen/privcmd.h | conflict! |
| 'P' | 00-05 | linux/tps6594_pfsm.h | conflict! |
| 'Q' | all | linux/soundcard.h | |
| 'R' | 00-1F | linux/random.h | conflict! |
| 'R' | 01 | linux/rfkill.h | conflict! |
| 'R' | 20-2F | linux/trace_mmap.h | |
| 'R' | C0-DF | net/bluetooth/rfcomm.h | |
| 'R' | E0 | uapi/linux/fsl_mc.h | |
| 'S' | all | linux/cdrom.h | conflict! |
| 'S' | 80-81 | scsi/scsi_ioctl.h | conflict! |
| 'S' | 82-FF | scsi/scsi.h | conflict! |
| 'S' | 00-7F | sound/asequencer.h | conflict! |
| 'T' | all | linux/soundcard.h | conflict! |
| 'T' | 00-AF | sound/asound.h | conflict! |
| 'T' | all | arch/x86/include/asm/ioctls.h | conflict! |
| 'T' | C0-DF | linux/if_tun.h | conflict! |
| 'U' | all | sound/asound.h | conflict! |
| 'U' | 00-CF | linux/uinput.h | conflict! |
| 'U' | 00-EF | linux/usbdevice_fs.h | |
| 'U' | C0-CF | drivers/bluetooth/hci_uart.h | |
| 'V' | all | linux/vt.h | conflict! |
| 'V' | all | linux/videodev2.h | conflict! |
| 'V' | C0 | linux/ivtvfb.h | conflict! |
| 'V' | C0 | linux/ivtv.h | conflict! |
| 'V' | C0 | media/si4713.h | conflict! |
| 'W' | 00-1F | linux/watchdog.h | conflict! |
| 'W' | 00-1F | linux/wanrouter.h | conflict! (pre 3.9) |
| 'W' | 00-3F | sound/asound.h | conflict! |
| 'W' | 40-5F | drivers/pci/switch/switchtec.c | |
| 'W' | 60-61 | linux/watch_queue.h | |
| 'X' | all | fs/xfs/xfs_fs.h, fs/xfs/linux-2.6/xfs_ioctl32.h, include/linux/falloc.h, linux/fs.h, | conflict! |
| 'X' | all | fs/ocfs2/ocfs_fs.h | conflict! |
| 'Z' | 14-15 | drivers/message/fusion/mptctl.h | |
| '[' | 00-3F | linux/usb/tmc.h | USB Test and Measurement Devices <mailto:[email protected]> |
| 'a' | all | linux/atm*.h, linux/sonet.h | ATM on linux <http://lrcwww.epfl.ch/> |
| 'a' | 00-0F | drivers/crypto/qat/qat_common/adf_cfg_common.h | conflict! qat driver |
| 'b' | 00-FF | conflict! bit3 vme host bridge <mailto:[email protected]> | |
| 'b' | 00-0F | linux/dma-buf.h | conflict! |
| 'c' | 00-7F | linux/comstats.h | conflict! |
| 'c' | 00-7F | linux/coda.h | conflict! |
| 'c' | 00-1F | linux/chio.h | conflict! |
| 'c' | 80-9F | arch/s390/include/asm/chsc.h | conflict! |
| 'c' | A0-AF | arch/x86/include/asm/msr.h conflict! | |
| 'd' | 00-FF | linux/char/drm/drm.h | conflict! |
| 'd' | 02-40 | pcmcia/ds.h | conflict! |
| 'd' | F0-FF | linux/digi1.h | |
| 'e' | all | linux/digi1.h | conflict! |
| 'f' | 00-1F | linux/ext2_fs.h | conflict! |
| 'f' | 00-1F | linux/ext3_fs.h | conflict! |
| 'f' | 00-0F | fs/jfs/jfs_dinode.h | conflict! |
| 'f' | 00-0F | fs/ext4/ext4.h | conflict! |
| 'f' | 00-0F | linux/fs.h | conflict! |
| 'f' | 00-0F | fs/ocfs2/ocfs2_fs.h | conflict! |
| 'f' | 13-27 | linux/fscrypt.h | |
| 'f' | 81-8F | linux/fsverity.h | |
| 'g' | 00-0F | linux/usb/gadgetfs.h | |
| 'g' | 20-2F | linux/usb/g_printer.h | |
| 'h' | 00-7F | conflict! Charon filesystem <mailto:[email protected]> | |
| 'h' | 00-1F | linux/hpet.h | conflict! |
| 'h' | 80-8F | fs/hfsplus/ioctl.c | |
| 'i' | 00-3F | linux/i2o-dev.h | conflict! |
| 'i' | 0B-1F | linux/ipmi.h | conflict! |
| 'i' | 80-8F | linux/i8k.h | |
| 'i' | 90-9F | linux/iio/*.h | IIO |
| 'j' | 00-3F | linux/joystick.h | |
| 'k' | 00-0F | linux/spi/spidev.h | conflict! |
| 'k' | 00-05 | video/kyro.h | conflict! |
| 'k' | 10-17 | linux/hsi/hsi_char.h | HSI character device |
| 'l' | 00-3F | linux/tcfs_fs.h | transparent cryptographic file system <http://web.archive.org/web/%2A/http://mikonos.dia.unisa.it/tcfs> |
| 'l' | 40-7F | linux/udf_fs_i.h | in development: <https://github.com/pali/udftools> |
| 'm' | 00-09 | linux/mmtimer.h | conflict! |
| 'm' | all | linux/mtio.h | conflict! |
| 'm' | all | linux/soundcard.h | conflict! |
| 'm' | all | linux/synclink.h | conflict! |
| 'm' | 00-19 | drivers/message/fusion/mptctl.h | conflict! |
| 'm' | 00 | drivers/scsi/megaraid/megaraid_ioctl.h | conflict! |
| 'n' | 00-7F | linux/ncp_fs.h and fs/ncpfs/ioctl.c | |
| 'n' | 80-8F | uapi/linux/nilfs2_api.h | NILFS2 |
| 'n' | E0-FF | linux/matroxfb.h | matroxfb |
| 'o' | 00-1F | fs/ocfs2/ocfs2_fs.h | OCFS2 |
| 'o' | 00-03 | mtd/ubi-user.h | conflict! (OCFS2 and UBI overlaps) |
| 'o' | 40-41 | mtd/ubi-user.h | UBI |
| 'o' | 01-A1 | linux/dvb/*.h | DVB |
| 'p' | 00-0F | linux/phantom.h | conflict! (OpenHaptics needs this) |
| 'p' | 00-1F | linux/rtc.h | conflict! |
| 'p' | 40-7F | linux/nvram.h | |
| 'p' | 80-9F | linux/ppdev.h | user-space parport <mailto:[email protected]> |
| 'p' | A1-A5 | linux/pps.h | LinuxPPS |
| 'p' | B1-B3 | linux/pps_gen.h | LinuxPPS <mailto:[email protected]> |
| 'q' | 00-1F | linux/serio.h | |
| 'q' | 80-FF | linux/telephony.h linux/ixjuser.h | Internet PhoneJACK, Internet LineJACK <http://web.archive.org/web/%2A/http://www.quicknet.net> |
| 'r' | 00-1F | linux/msdos_fs.h and fs/fat/dir.c | |
| 's' | all | linux/cdk.h | |
| 't' | 00-7F | linux/ppp-ioctl.h | |
| 't' | 80-8F | linux/isdn_ppp.h | |
| 't' | 90-91 | linux/toshiba.h | toshiba and toshiba_acpi SMM |
| 'u' | 00-1F | linux/smb_fs.h | gone |
| 'u' | 00-2F | linux/ublk_cmd.h | conflict! |
| 'u' | 20-3F | linux/uvcvideo.h | USB video class host driver |
| 'u' | 40-4f | linux/udmabuf.h | userspace dma-buf misc device |
| 'v' | 00-1F | linux/ext2_fs.h | conflict! |
| 'v' | 00-1F | linux/fs.h | conflict! |
| 'v' | 00-0F | linux/sonypi.h | conflict! |
| 'v' | 00-0F | media/v4l2-subdev.h | conflict! |
| 'v' | 20-27 | arch/powerpc/include/uapi/asm/vas-api.h | VAS API |
| 'v' | C0-FF | linux/meye.h | conflict! |
| 'w' | all | CERN SCI driver | |
| 'y' | 00-1F | packet based user level communications <mailto:[email protected]> | |
| 'z' | 00-3F | CAN bus card conflict! <mailto:[email protected]> | |
| 'z' | 40-7F | CAN bus card conflict! <mailto:[email protected]> | |
| 'z' | 10-4F | drivers/s390/crypto/zcrypt_api.h | conflict! |
| '|' | 00-7F | linux/media.h | |
| '|' | 80-9F | samples/ | Any sample and example drivers |
| 0x80 | 00-1F | linux/fb.h | |
| 0x81 | 00-1F | linux/vduse.h | |
| 0x89 | 00-06 | arch/x86/include/asm/sockios.h | |
| 0x89 | 0B-DF | linux/sockios.h | |
| 0x89 | E0-EF | linux/sockios.h | SIOCPROTOPRIVATE range |
| 0x89 | F0-FF | linux/sockios.h | SIOCDEVPRIVATE range |
| 0x8A | 00-1F | linux/eventpoll.h | |
| 0x8B | all | linux/wireless.h | |
| 0x8C | 00-3F | WiNRADiO driver <http://www.winradio.com.au/> | |
| 0x90 | 00 | drivers/cdrom/sbpcd.h | |
| 0x92 | 00-0F | drivers/usb/mon/mon_bin.c | |
| 0x93 | 60-7F | linux/auto_fs.h | |
| 0x94 | all | fs/btrfs/ioctl.h and linux/fs.h | Btrfs filesystem some lifted to vfs/generic |
| 0x97 | 00-7F | fs/ceph/ioctl.h | Ceph file system |
| 0x99 | 00-0F | 537-Addinboard driver <mailto:[email protected]> | |
| 0x9A | 00-0F | include/uapi/fwctl/fwctl.h | |
| 0xA0 | all | linux/sdp/sdp.h | Industrial Device Project <mailto:[email protected]> |
| 0xA1 | 0 | linux/vtpm_proxy.h | TPM Emulator Proxy Driver |
| 0xA2 | all | uapi/linux/acrn.h | ACRN hypervisor |
| 0xA3 | 80-8F | Port ACL in development: <mailto:[email protected]> | |
| 0xA3 | 90-9F | linux/dtlk.h | |
| 0xA4 | 00-1F | uapi/linux/tee.h | Generic TEE subsystem |
| 0xA4 | 00-1F | uapi/asm/sgx.h | <mailto:[email protected]> |
| 0xA5 | 01-05 | linux/surface_aggregator/cdev.h | Microsoft Surface Platform System Aggregator <mailto:[email protected]> |
| 0xA5 | 20-2F | linux/surface_aggregator/dtx.h | Microsoft Surface DTX driver <mailto:[email protected]> |
| 0xAA | 00-3F | linux/uapi/linux/userfaultfd.h | |
| 0xAB | 00-1F | linux/nbd.h | |
| 0xAC | 00-1F | linux/raw.h | |
| 0xAD | 00 | Netfilter device in development: <mailto:[email protected]> | |
| 0xAE | 00-1F | linux/kvm.h | Kernel-based Virtual Machine <mailto:[email protected]> |
| 0xAE | 40-FF | linux/kvm.h | Kernel-based Virtual Machine <mailto:[email protected]> |
| 0xAE | 20-3F | linux/nitro_enclaves.h | Nitro Enclaves |
| 0xAF | 00-1F | linux/fsl_hypervisor.h | Freescale hypervisor |
| 0xB0 | all | RATIO devices in development: <mailto:[email protected]> | |
| 0xB1 | 00-1F | PPPoX <mailto:[email protected]> | |
| 0xB2 | 00 | arch/powerpc/include/uapi/asm/papr-vpd.h | powerpc/pseries VPD API <mailto:linuxppc-dev> |
| 0xB2 | 01-02 | arch/powerpc/include/uapi/asm/papr-sysparm.h | powerpc/pseries system parameter API <mailto:linuxppc-dev> |
| 0xB2 | 03-05 | arch/powerpc/include/uapi/asm/papr-indices.h | powerpc/pseries indices API <mailto:linuxppc-dev> |
| 0xB2 | 06-07 | arch/powerpc/include/uapi/asm/papr-platform-dump.h | powerpc/pseries Platform Dump API <mailto:linuxppc-dev> |
| 0xB2 | 08 | powerpc/include/uapi/asm/papr-physical-attestation.h | powerpc/pseries Physical Attestation API <mailto:linuxppc-dev> |
| 0xB3 | 00 | linux/mmc/ioctl.h | |
| 0xB4 | 00-0F | linux/gpio.h | <mailto:[email protected]> |
| 0xB5 | 00-0F | uapi/linux/rpmsg.h | <mailto:[email protected]> |
| 0xB6 | all | linux/fpga-dfl.h | |
| 0xB7 | all | uapi/linux/remoteproc_cdev.h | <mailto:[email protected]> |
| 0xB7 | all | uapi/linux/nsfs.h | <mailto:Andrei Vagin <[email protected]>> |
| 0xB8 | 01-02 | uapi/misc/mrvl_cn10k_dpi.h | Marvell CN10K DPI driver |
| 0xB8 | all | uapi/linux/mshv.h | Microsoft Hyper-V /dev/mshv driver <mailto:[email protected]> |
| 0xC0 | 00-0F | linux/usb/iowarrior.h | |
| 0xCA | 00-0F | uapi/misc/cxl.h | Dead since 6.15 |
| 0xCA | 10-2F | uapi/misc/ocxl.h | |
| 0xCA | 80-BF | uapi/scsi/cxlflash_ioctl.h | Dead since 6.15 |
| 0xCB | 00-1F | CBM serial IEC bus in development: <mailto:[email protected]> | |
| 0xCC | 00-0F | drivers/misc/ibmvmc.h | pseries VMC driver |
| 0xCD | 01 | linux/reiserfs_fs.h | Dead since 6.13 |
| 0xCE | 01-02 | uapi/linux/cxl_mem.h | Compute Express Link Memory Devices |
| 0xCF | 02 | fs/smb/client/cifs_ioctl.h | |
| 0xDB | 00-0F | drivers/char/mwave/mwavepub.h | |
| 0xDD | 00-3F | ZFCP device driver see drivers/s390/scsi/ <mailto:[email protected]> | |
| 0xE5 | 00-3F | linux/fuse.h | |
| 0xEC | 00-01 | drivers/platform/chrome/cros_ec_dev.h | ChromeOS EC driver |
| 0xEE | 00-09 | uapi/linux/pfrut.h | Platform Firmware Runtime Update and Telemetry |
| 0xF3 | 00-3F | drivers/usb/misc/sisusbvga/sisusb.h | sisfb (in development) <mailto:[email protected]> |
| 0xF6 | all | LTTng Linux Trace Toolkit Next Generation <mailto:[email protected]> | |
| 0xF8 | all | arch/x86/include/uapi/asm/amd_hsmp.h | AMD HSMP EPYC system management interface driver <mailto:[email protected]> |
| 0xF9 | 00-0F | uapi/misc/amd-apml.h | AMD side band system management interface driver <mailto:[email protected]> |
| 0xFD | all | linux/dm-ioctl.h | |
| 0xFE | all | linux/isst_if.h |