superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

powerpc/pseries: Define papr-hvpipe ioctl 

PowerPC FW introduced HVPIPE RTAS calls such as
ibm,send-hvpipe-msg and ibm,receive-hvpipe-msg for the user space
to exchange information with different sources such as Hardware
Management Consoles (HMC).

HVPIPE_IOC_CREATE_HANDLE is defined to use /dev/papr-hvpipe
interface for ibm,send-hvpipe-msg and ibm,receive-hvpipe-msg
RTAS calls.

Also defined papr_hvpipe_hdr which will added in the payload
that is passed between the kernel and the user space.

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
Tested-by: Shashank MS <shashank.gowda@in.ibm.com>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250909084402.1488456-2-haren@linux.ibm.com
pull/1354/merge
Haren Myneni 2025-09-09 01:43:53 -07:00 committed by Madhavan Srinivasan
parent daaa574aba
commit 043439ad1a
2 changed files with 35 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/userspace-api/ioctl/ioctl-number.rst
View File

@ -374,6 +374,8 @@ Code Seq# Include File Comments
<mailto:linuxppc-dev@lists.ozlabs.org>
0xB2 08 arch/powerpc/include/uapi/asm/papr-physical-attestation.h powerpc/pseries Physical Attestation API
<mailto:linuxppc-dev@lists.ozlabs.org>
0xB2 09 arch/powerpc/include/uapi/asm/papr-hvpipe.h powerpc/pseries HVPIPE API
<mailto:linuxppc-dev@lists.ozlabs.org>
0xB3 00 linux/mmc/ioctl.h
0xB4 00-0F linux/gpio.h <mailto:linux-gpio@vger.kernel.org>
0xB5 00-0F uapi/linux/rpmsg.h <mailto:linux-remoteproc@vger.kernel.org>

33
arch/powerpc/include/uapi/asm/papr-hvpipe.h Normal file
View File

@ -0,0 +1,33 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_PAPR_HVPIPE_H_
#define _UAPI_PAPR_HVPIPE_H_
#include <linux/types.h>
#include <asm/ioctl.h>
#include <asm/papr-miscdev.h>
/*
* This header is included in payload between OS and the user
* space.
* flags: OS notifies the user space whether the hvpipe is
* closed or the buffer has the payload.
*/
struct papr_hvpipe_hdr {
u8 version;
u8 reserved[3];
u32 flags;
u8 reserved2[40];
};
/*
* ioctl for /dev/papr-hvpipe
*/
#define PAPR_HVPIPE_IOC_CREATE_HANDLE _IOW(PAPR_MISCDEV_IOC_ID, 9, __u32)
/*
* hvpipe_hdr flags used for read()
*/
#define HVPIPE_MSG_AVAILABLE 0x01 /* Payload is available */
#define HVPIPE_LOST_CONNECTION 0x02 /* Pipe connection is closed/unavailable */
#endif /* _UAPI_PAPR_HVPIPE_H_ */