mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-14 06:35:12 +00:00
540761b7f5
PowerVM introduces two different type of credits: Default and Quality of service (QoS). The total number of default credits available on each LPAR depends on CPU resources configured. But these credits can be shared or over-committed across LPARs in shared mode which can result in paste command failure (RMA_busy). To avoid NX HW contention, the hypervisor ntroduces QoS credit type which makes sure guaranteed access to NX esources. The system admins can assign QoS credits or each LPAR via HMC. Default credit type is used to allocate a VAS window by default as on PowerVM implementation. But the process can pass VAS_TX_WIN_FLAG_QOS_CREDIT flag with VAS_TX_WIN_OPEN ioctl to open QoS type window. Signed-off-by: Haren Myneni <haren@linux.ibm.com> Acked-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/aa950b7b8e8077364267720274a7b9ec34e76e73.camel@linux.ibm.com
28 lines
664 B
C
28 lines
664 B
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
|
|
/*
|
|
* Copyright 2019 IBM Corp.
|
|
*/
|
|
|
|
#ifndef _UAPI_MISC_VAS_H
|
|
#define _UAPI_MISC_VAS_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <asm/ioctl.h>
|
|
|
|
#define VAS_MAGIC 'v'
|
|
#define VAS_TX_WIN_OPEN _IOW(VAS_MAGIC, 0x20, struct vas_tx_win_open_attr)
|
|
|
|
/* Flags to VAS TX open window ioctl */
|
|
/* To allocate a window with QoS credit, otherwise use default credit */
|
|
#define VAS_TX_WIN_FLAG_QOS_CREDIT 0x0000000000000001
|
|
|
|
struct vas_tx_win_open_attr {
|
|
__u32 version;
|
|
__s16 vas_id; /* specific instance of vas or -1 for default */
|
|
__u16 reserved1;
|
|
__u64 flags;
|
|
__u64 reserved2[6];
|
|
};
|
|
|
|
#endif /* _UAPI_MISC_VAS_H */
|