blob: 10fa80eef13a68d0c4b88a71fbf06f75c8bf2084 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright © 2015 Intel Corporation.
*
* Authors: David Woodhouse <David.Woodhouse@intel.com>
*/
#ifndef __INTEL_SVM_H__
#define __INTEL_SVM_H__
/* Values for rxwp in fault_cb callback */
#define SVM_REQ_READ (1<<3)
#define SVM_REQ_WRITE (1<<2)
#define SVM_REQ_EXEC (1<<1)
#define SVM_REQ_PRIV (1<<0)
/*
* The SVM_FLAG_SUPERVISOR_MODE flag requests a PASID which can be used only
* for access to kernel addresses. No IOTLB flushes are automatically done
* for kernel mappings; it is valid only for access to the kernel's static
* 1:1 mapping of physical memory — not to vmalloc or even module mappings.
* A future API addition may permit the use of such ranges, by means of an
* explicit IOTLB flush call (akin to the DMA API's unmap method).
*
* It is unlikely that we will ever hook into flush_tlb_kernel_range() to
* do such IOTLB flushes automatically.
*/
#define SVM_FLAG_SUPERVISOR_MODE BIT(0)
/*
* The SVM_FLAG_GUEST_MODE flag is used when a PASID bind is for guest
* processes. Compared to the host bind, the primary differences are:
* 1. mm life cycle management
* 2. fault reporting
*/
#define SVM_FLAG_GUEST_MODE BIT(1)
/*
* The SVM_FLAG_GUEST_PASID flag is used when a guest has its own PASID space,
* which requires guest and host PASID translation at both directions.
*/
#define SVM_FLAG_GUEST_PASID BIT(2)
#endif /* __INTEL_SVM_H__ */
|
