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authorMarc Zyngier <marc.zyngier@arm.com>2016-12-02 09:19:35 -0500
committerStefano Stabellini <sstabellini@kernel.org>2016-12-02 14:49:55 -0500
commit2fbadc3002c5f172d20aa2e7e48920c5f14ed11f (patch)
treeb20a275093fc3459ee2f03550031d3b474b96be9
parentb36585a0a3c169612f3105139464a2da1d3ecc03 (diff)
arm/arm64: xen: Move shared architecture headers to include/xen/arm
ARM and arm64 Xen ports share a number of headers, leading to packaging issues when these headers needs to be exported, as it breaks the reasonable requirement that an architecture port has self-contained headers. Fix the issue by moving the 5 header files to include/xen/arm, and keep local placeholders to include the relevant files. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Diffstat
-rw-r--r--arch/arm/include/asm/xen/hypercall.h88
-rw-r--r--arch/arm/include/asm/xen/hypervisor.h40
-rw-r--r--arch/arm/include/asm/xen/interface.h86
-rw-r--r--arch/arm/include/asm/xen/page-coherent.h99
-rw-r--r--arch/arm/include/asm/xen/page.h123
-rw-r--r--arch/arm64/include/asm/xen/hypercall.h2
-rw-r--r--arch/arm64/include/asm/xen/hypervisor.h2
-rw-r--r--arch/arm64/include/asm/xen/interface.h2
-rw-r--r--arch/arm64/include/asm/xen/page-coherent.h2
-rw-r--r--arch/arm64/include/asm/xen/page.h2
-rw-r--r--include/xen/arm/hypercall.h87
-rw-r--r--include/xen/arm/hypervisor.h39
-rw-r--r--include/xen/arm/interface.h85
-rw-r--r--include/xen/arm/page-coherent.h98
-rw-r--r--include/xen/arm/page.h122
15 files changed, 441 insertions, 436 deletions
diff --git a/arch/arm/include/asm/xen/hypercall.h b/arch/arm/include/asm/xen/hypercall.h
index 9d874db13c0e..3522cbaed316 100644
--- a/arch/arm/include/asm/xen/hypercall.h
+++ b/arch/arm/include/asm/xen/hypercall.h
@@ -1,87 +1 @@
1/****************************************************************************** #include <xen/arm/hypercall.h>
2 * hypercall.h
3 *
4 * Linux-specific hypervisor handling.
5 *
6 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation; or, when distributed
11 * separately from the Linux kernel or incorporated into other
12 * software packages, subject to the following license:
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this source file (the "Software"), to deal in the Software without
16 * restriction, including without limitation the rights to use, copy, modify,
17 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
18 * and to permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
29 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
30 * IN THE SOFTWARE.
31 */
32
33#ifndef _ASM_ARM_XEN_HYPERCALL_H
34#define _ASM_ARM_XEN_HYPERCALL_H
35
36#include <linux/bug.h>
37
38#include <xen/interface/xen.h>
39#include <xen/interface/sched.h>
40#include <xen/interface/platform.h>
41
42long privcmd_call(unsigned call, unsigned long a1,
43 unsigned long a2, unsigned long a3,
44 unsigned long a4, unsigned long a5);
45int HYPERVISOR_xen_version(int cmd, void *arg);
46int HYPERVISOR_console_io(int cmd, int count, char *str);
47int HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count);
48int HYPERVISOR_sched_op(int cmd, void *arg);
49int HYPERVISOR_event_channel_op(int cmd, void *arg);
50unsigned long HYPERVISOR_hvm_op(int op, void *arg);
51int HYPERVISOR_memory_op(unsigned int cmd, void *arg);
52int HYPERVISOR_physdev_op(int cmd, void *arg);
53int HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args);
54int HYPERVISOR_tmem_op(void *arg);
55int HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type);
56int HYPERVISOR_platform_op_raw(void *arg);
57static inline int HYPERVISOR_platform_op(struct xen_platform_op *op)
58{
59 op->interface_version = XENPF_INTERFACE_VERSION;
60 return HYPERVISOR_platform_op_raw(op);
61}
62int HYPERVISOR_multicall(struct multicall_entry *calls, uint32_t nr);
63
64static inline int
65HYPERVISOR_suspend(unsigned long start_info_mfn)
66{
67 struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
68
69 /* start_info_mfn is unused on ARM */
70 return HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
71}
72
73static inline void
74MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
75 unsigned int new_val, unsigned long flags)
76{
77 BUG();
78}
79
80static inline void
81MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
82 int count, int *success_count, domid_t domid)
83{
84 BUG();
85}
86
87#endif /* _ASM_ARM_XEN_HYPERCALL_H */
diff --git a/arch/arm/include/asm/xen/hypervisor.h b/arch/arm/include/asm/xen/hypervisor.h
index 95251512e2c4..d6e7709d0688 100644
--- a/arch/arm/include/asm/xen/hypervisor.h
+++ b/arch/arm/include/asm/xen/hypervisor.h
@@ -1,39 +1 @@
1#ifndef _ASM_ARM_XEN_HYPERVISOR_H #include <xen/arm/hypervisor.h>
2#define _ASM_ARM_XEN_HYPERVISOR_H
3
4#include <linux/init.h>
5
6extern struct shared_info *HYPERVISOR_shared_info;
7extern struct start_info *xen_start_info;
8
9/* Lazy mode for batching updates / context switch */
10enum paravirt_lazy_mode {
11 PARAVIRT_LAZY_NONE,
12 PARAVIRT_LAZY_MMU,
13 PARAVIRT_LAZY_CPU,
14};
15
16static inline enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
17{
18 return PARAVIRT_LAZY_NONE;
19}
20
21extern struct dma_map_ops *xen_dma_ops;
22
23#ifdef CONFIG_XEN
24void __init xen_early_init(void);
25#else
26static inline void xen_early_init(void) { return; }
27#endif
28
29#ifdef CONFIG_HOTPLUG_CPU
30static inline void xen_arch_register_cpu(int num)
31{
32}
33
34static inline void xen_arch_unregister_cpu(int num)
35{
36}
37#endif
38
39#endif /* _ASM_ARM_XEN_HYPERVISOR_H */
diff --git a/arch/arm/include/asm/xen/interface.h b/arch/arm/include/asm/xen/interface.h
index 75d596862892..88c0d75da190 100644
--- a/arch/arm/include/asm/xen/interface.h
+++ b/arch/arm/include/asm/xen/interface.h
@@ -1,85 +1 @@
1/****************************************************************************** #include <xen/arm/interface.h>
2 * Guest OS interface to ARM Xen.
3 *
4 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
5 */
6
7#ifndef _ASM_ARM_XEN_INTERFACE_H
8#define _ASM_ARM_XEN_INTERFACE_H
9
10#include <linux/types.h>
11
12#define uint64_aligned_t uint64_t __attribute__((aligned(8)))
13
14#define __DEFINE_GUEST_HANDLE(name, type) \
15 typedef struct { union { type *p; uint64_aligned_t q; }; } \
16 __guest_handle_ ## name
17
18#define DEFINE_GUEST_HANDLE_STRUCT(name) \
19 __DEFINE_GUEST_HANDLE(name, struct name)
20#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
21#define GUEST_HANDLE(name) __guest_handle_ ## name
22
23#define set_xen_guest_handle(hnd, val) \
24 do { \
25 if (sizeof(hnd) == 8) \
26 *(uint64_t *)&(hnd) = 0; \
27 (hnd).p = val; \
28 } while (0)
29
30#define __HYPERVISOR_platform_op_raw __HYPERVISOR_platform_op
31
32#ifndef __ASSEMBLY__
33/* Explicitly size integers that represent pfns in the interface with
34 * Xen so that we can have one ABI that works for 32 and 64 bit guests.
35 * Note that this means that the xen_pfn_t type may be capable of
36 * representing pfn's which the guest cannot represent in its own pfn
37 * type. However since pfn space is controlled by the guest this is
38 * fine since it simply wouldn't be able to create any sure pfns in
39 * the first place.
40 */
41typedef uint64_t xen_pfn_t;
42#define PRI_xen_pfn "llx"
43typedef uint64_t xen_ulong_t;
44#define PRI_xen_ulong "llx"
45typedef int64_t xen_long_t;
46#define PRI_xen_long "llx"
47/* Guest handles for primitive C types. */
48__DEFINE_GUEST_HANDLE(uchar, unsigned char);
49__DEFINE_GUEST_HANDLE(uint, unsigned int);
50DEFINE_GUEST_HANDLE(char);
51DEFINE_GUEST_HANDLE(int);
52DEFINE_GUEST_HANDLE(void);
53DEFINE_GUEST_HANDLE(uint64_t);
54DEFINE_GUEST_HANDLE(uint32_t);
55DEFINE_GUEST_HANDLE(xen_pfn_t);
56DEFINE_GUEST_HANDLE(xen_ulong_t);
57
58/* Maximum number of virtual CPUs in multi-processor guests. */
59#define MAX_VIRT_CPUS 1
60
61struct arch_vcpu_info { };
62struct arch_shared_info { };
63
64/* TODO: Move pvclock definitions some place arch independent */
65struct pvclock_vcpu_time_info {
66 u32 version;
67 u32 pad0;
68 u64 tsc_timestamp;
69 u64 system_time;
70 u32 tsc_to_system_mul;
71 s8 tsc_shift;
72 u8 flags;
73 u8 pad[2];
74} __attribute__((__packed__)); /* 32 bytes */
75
76/* It is OK to have a 12 bytes struct with no padding because it is packed */
77struct pvclock_wall_clock {
78 u32 version;
79 u32 sec;
80 u32 nsec;
81 u32 sec_hi;
82} __attribute__((__packed__));
83#endif
84
85#endif /* _ASM_ARM_XEN_INTERFACE_H */
diff --git a/arch/arm/include/asm/xen/page-coherent.h b/arch/arm/include/asm/xen/page-coherent.h
index 95ce6ac3a971..b3ef061d8b74 100644
--- a/arch/arm/include/asm/xen/page-coherent.h
+++ b/arch/arm/include/asm/xen/page-coherent.h
@@ -1,98 +1 @@
1#ifndef _ASM_ARM_XEN_PAGE_COHERENT_H #include <xen/arm/page-coherent.h>
2#define _ASM_ARM_XEN_PAGE_COHERENT_H
3
4#include <asm/page.h>
5#include <linux/dma-mapping.h>
6
7void __xen_dma_map_page(struct device *hwdev, struct page *page,
8 dma_addr_t dev_addr, unsigned long offset, size_t size,
9 enum dma_data_direction dir, unsigned long attrs);
10void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
11 size_t size, enum dma_data_direction dir,
12 unsigned long attrs);
13void __xen_dma_sync_single_for_cpu(struct device *hwdev,
14 dma_addr_t handle, size_t size, enum dma_data_direction dir);
15
16void __xen_dma_sync_single_for_device(struct device *hwdev,
17 dma_addr_t handle, size_t size, enum dma_data_direction dir);
18
19static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
20 dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
21{
22 return __generic_dma_ops(hwdev)->alloc(hwdev, size, dma_handle, flags, attrs);
23}
24
25static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
26 void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
27{
28 __generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, attrs);
29}
30
31static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
32 dma_addr_t dev_addr, unsigned long offset, size_t size,
33 enum dma_data_direction dir, unsigned long attrs)
34{
35 unsigned long page_pfn = page_to_xen_pfn(page);
36 unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr);
37 unsigned long compound_pages =
38 (1<<compound_order(page)) * XEN_PFN_PER_PAGE;
39 bool local = (page_pfn <= dev_pfn) &&
40 (dev_pfn - page_pfn < compound_pages);
41
42 /*
43 * Dom0 is mapped 1:1, while the Linux page can span across
44 * multiple Xen pages, it's not possible for it to contain a
45 * mix of local and foreign Xen pages. So if the first xen_pfn
46 * == mfn the page is local otherwise it's a foreign page
47 * grant-mapped in dom0. If the page is local we can safely
48 * call the native dma_ops function, otherwise we call the xen
49 * specific function.
50 */
51 if (local)
52 __generic_dma_ops(hwdev)->map_page(hwdev, page, offset, size, dir, attrs);
53 else
54 __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs);
55}
56
57static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
58 size_t size, enum dma_data_direction dir, unsigned long attrs)
59{
60 unsigned long pfn = PFN_DOWN(handle);
61 /*
62 * Dom0 is mapped 1:1, while the Linux page can be spanned accross
63 * multiple Xen page, it's not possible to have a mix of local and
64 * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a
65 * foreign mfn will always return false. If the page is local we can
66 * safely call the native dma_ops function, otherwise we call the xen
67 * specific function.
68 */
69 if (pfn_valid(pfn)) {
70 if (__generic_dma_ops(hwdev)->unmap_page)
71 __generic_dma_ops(hwdev)->unmap_page(hwdev, handle, size, dir, attrs);
72 } else
73 __xen_dma_unmap_page(hwdev, handle, size, dir, attrs);
74}
75
76static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
77 dma_addr_t handle, size_t size, enum dma_data_direction dir)
78{
79 unsigned long pfn = PFN_DOWN(handle);
80 if (pfn_valid(pfn)) {
81 if (__generic_dma_ops(hwdev)->sync_single_for_cpu)
82 __generic_dma_ops(hwdev)->sync_single_for_cpu(hwdev, handle, size, dir);
83 } else
84 __xen_dma_sync_single_for_cpu(hwdev, handle, size, dir);
85}
86
87static inline void xen_dma_sync_single_for_device(struct device *hwdev,
88 dma_addr_t handle, size_t size, enum dma_data_direction dir)
89{
90 unsigned long pfn = PFN_DOWN(handle);
91 if (pfn_valid(pfn)) {
92 if (__generic_dma_ops(hwdev)->sync_single_for_device)
93 __generic_dma_ops(hwdev)->sync_single_for_device(hwdev, handle, size, dir);
94 } else
95 __xen_dma_sync_single_for_device(hwdev, handle, size, dir);
96}
97
98#endif /* _ASM_ARM_XEN_PAGE_COHERENT_H */
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h
index 415dbc6e43fd..31bbc803cecb 100644
--- a/arch/arm/include/asm/xen/page.h
+++ b/arch/arm/include/asm/xen/page.h
@@ -1,122 +1 @@
1#ifndef _ASM_ARM_XEN_PAGE_H #include <xen/arm/page.h>
2#define _ASM_ARM_XEN_PAGE_H
3
4#include <asm/page.h>
5#include <asm/pgtable.h>
6
7#include <linux/pfn.h>
8#include <linux/types.h>
9#include <linux/dma-mapping.h>
10
11#include <xen/xen.h>
12#include <xen/interface/grant_table.h>
13
14#define phys_to_machine_mapping_valid(pfn) (1)
15
16/* Xen machine address */
17typedef struct xmaddr {
18 phys_addr_t maddr;
19} xmaddr_t;
20
21/* Xen pseudo-physical address */
22typedef struct xpaddr {
23 phys_addr_t paddr;
24} xpaddr_t;
25
26#define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
27#define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
28
29#define INVALID_P2M_ENTRY (~0UL)
30
31/*
32 * The pseudo-physical frame (pfn) used in all the helpers is always based
33 * on Xen page granularity (i.e 4KB).
34 *
35 * A Linux page may be split across multiple non-contiguous Xen page so we
36 * have to keep track with frame based on 4KB page granularity.
37 *
38 * PV drivers should never make a direct usage of those helpers (particularly
39 * pfn_to_gfn and gfn_to_pfn).
40 */
41
42unsigned long __pfn_to_mfn(unsigned long pfn);
43extern struct rb_root phys_to_mach;
44
45/* Pseudo-physical <-> Guest conversion */
46static inline unsigned long pfn_to_gfn(unsigned long pfn)
47{
48 return pfn;
49}
50
51static inline unsigned long gfn_to_pfn(unsigned long gfn)
52{
53 return gfn;
54}
55
56/* Pseudo-physical <-> BUS conversion */
57static inline unsigned long pfn_to_bfn(unsigned long pfn)
58{
59 unsigned long mfn;
60
61 if (phys_to_mach.rb_node != NULL) {
62 mfn = __pfn_to_mfn(pfn);
63 if (mfn != INVALID_P2M_ENTRY)
64 return mfn;
65 }
66
67 return pfn;
68}
69
70static inline unsigned long bfn_to_pfn(unsigned long bfn)
71{
72 return bfn;
73}
74
75#define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn)
76
77/* VIRT <-> GUEST conversion */
78#define virt_to_gfn(v) (pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT))
79#define gfn_to_virt(m) (__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT))
80
81/* Only used in PV code. But ARM guests are always HVM. */
82static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
83{
84 BUG();
85}
86
87/* TODO: this shouldn't be here but it is because the frontend drivers
88 * are using it (its rolled in headers) even though we won't hit the code path.
89 * So for right now just punt with this.
90 */
91static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
92{
93 BUG();
94 return NULL;
95}
96
97extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
98 struct gnttab_map_grant_ref *kmap_ops,
99 struct page **pages, unsigned int count);
100
101extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
102 struct gnttab_unmap_grant_ref *kunmap_ops,
103 struct page **pages, unsigned int count);
104
105bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
106bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
107 unsigned long nr_pages);
108
109static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
110{
111 return __set_phys_to_machine(pfn, mfn);
112}
113
114#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
115#define xen_unmap(cookie) iounmap((cookie))
116
117bool xen_arch_need_swiotlb(struct device *dev,
118 phys_addr_t phys,
119 dma_addr_t dev_addr);
120unsigned long xen_get_swiotlb_free_pages(unsigned int order);
121
122#endif /* _ASM_ARM_XEN_PAGE_H */
diff --git a/arch/arm64/include/asm/xen/hypercall.h b/arch/arm64/include/asm/xen/hypercall.h
index 74b0c423ff5b..3522cbaed316 100644
--- a/arch/arm64/include/asm/xen/hypercall.h
+++ b/arch/arm64/include/asm/xen/hypercall.h
@@ -1 +1 @@
#include <../../arm/include/asm/xen/hypercall.h> #include <xen/arm/hypercall.h>
diff --git a/arch/arm64/include/asm/xen/hypervisor.h b/arch/arm64/include/asm/xen/hypervisor.h
index f263da8e8769..d6e7709d0688 100644
--- a/arch/arm64/include/asm/xen/hypervisor.h
+++ b/arch/arm64/include/asm/xen/hypervisor.h
@@ -1 +1 @@
#include <../../arm/include/asm/xen/hypervisor.h> #include <xen/arm/hypervisor.h>
diff --git a/arch/arm64/include/asm/xen/interface.h b/arch/arm64/include/asm/xen/interface.h
index 44457aebeed4..88c0d75da190 100644
--- a/arch/arm64/include/asm/xen/interface.h
+++ b/arch/arm64/include/asm/xen/interface.h
@@ -1 +1 @@
#include <../../arm/include/asm/xen/interface.h> #include <xen/arm/interface.h>
diff --git a/arch/arm64/include/asm/xen/page-coherent.h b/arch/arm64/include/asm/xen/page-coherent.h
index 2052102b4e02..b3ef061d8b74 100644
--- a/arch/arm64/include/asm/xen/page-coherent.h
+++ b/arch/arm64/include/asm/xen/page-coherent.h
@@ -1 +1 @@
#include <../../arm/include/asm/xen/page-coherent.h> #include <xen/arm/page-coherent.h>
diff --git a/arch/arm64/include/asm/xen/page.h b/arch/arm64/include/asm/xen/page.h
index bed87ec36780..31bbc803cecb 100644
--- a/arch/arm64/include/asm/xen/page.h
+++ b/arch/arm64/include/asm/xen/page.h
@@ -1 +1 @@
#include <../../arm/include/asm/xen/page.h> #include <xen/arm/page.h>
diff --git a/include/xen/arm/hypercall.h b/include/xen/arm/hypercall.h
new file mode 100644
index 000000000000..9d874db13c0e
--- /dev/null
+++ b/include/xen/arm/hypercall.h
@@ -0,0 +1,87 @@
1/******************************************************************************
2 * hypercall.h
3 *
4 * Linux-specific hypervisor handling.
5 *
6 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation; or, when distributed
11 * separately from the Linux kernel or incorporated into other
12 * software packages, subject to the following license:
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this source file (the "Software"), to deal in the Software without
16 * restriction, including without limitation the rights to use, copy, modify,
17 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
18 * and to permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
29 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
30 * IN THE SOFTWARE.
31 */
32
33#ifndef _ASM_ARM_XEN_HYPERCALL_H
34#define _ASM_ARM_XEN_HYPERCALL_H
35
36#include <linux/bug.h>
37
38#include <xen/interface/xen.h>
39#include <xen/interface/sched.h>
40#include <xen/interface/platform.h>
41
42long privcmd_call(unsigned call, unsigned long a1,
43 unsigned long a2, unsigned long a3,
44 unsigned long a4, unsigned long a5);
45int HYPERVISOR_xen_version(int cmd, void *arg);
46int HYPERVISOR_console_io(int cmd, int count, char *str);
47int HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count);
48int HYPERVISOR_sched_op(int cmd, void *arg);
49int HYPERVISOR_event_channel_op(int cmd, void *arg);
50unsigned long HYPERVISOR_hvm_op(int op, void *arg);
51int HYPERVISOR_memory_op(unsigned int cmd, void *arg);
52int HYPERVISOR_physdev_op(int cmd, void *arg);
53int HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args);
54int HYPERVISOR_tmem_op(void *arg);
55int HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type);
56int HYPERVISOR_platform_op_raw(void *arg);
57static inline int HYPERVISOR_platform_op(struct xen_platform_op *op)
58{
59 op->interface_version = XENPF_INTERFACE_VERSION;
60 return HYPERVISOR_platform_op_raw(op);
61}
62int HYPERVISOR_multicall(struct multicall_entry *calls, uint32_t nr);
63
64static inline int
65HYPERVISOR_suspend(unsigned long start_info_mfn)
66{
67 struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
68
69 /* start_info_mfn is unused on ARM */
70 return HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
71}
72
73static inline void
74MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
75 unsigned int new_val, unsigned long flags)
76{
77 BUG();
78}
79
80static inline void
81MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
82 int count, int *success_count, domid_t domid)
83{
84 BUG();
85}
86
87#endif /* _ASM_ARM_XEN_HYPERCALL_H */
diff --git a/include/xen/arm/hypervisor.h b/include/xen/arm/hypervisor.h
new file mode 100644
index 000000000000..95251512e2c4
--- /dev/null
+++ b/include/xen/arm/hypervisor.h
@@ -0,0 +1,39 @@
1#ifndef _ASM_ARM_XEN_HYPERVISOR_H
2#define _ASM_ARM_XEN_HYPERVISOR_H
3
4#include <linux/init.h>
5
6extern struct shared_info *HYPERVISOR_shared_info;
7extern struct start_info *xen_start_info;
8
9/* Lazy mode for batching updates / context switch */
10enum paravirt_lazy_mode {
11 PARAVIRT_LAZY_NONE,
12 PARAVIRT_LAZY_MMU,
13 PARAVIRT_LAZY_CPU,
14};
15
16static inline enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
17{
18 return PARAVIRT_LAZY_NONE;
19}
20
21extern struct dma_map_ops *xen_dma_ops;
22
23#ifdef CONFIG_XEN
24void __init xen_early_init(void);
25#else
26static inline void xen_early_init(void) { return; }
27#endif
28
29#ifdef CONFIG_HOTPLUG_CPU
30static inline void xen_arch_register_cpu(int num)
31{
32}
33
34static inline void xen_arch_unregister_cpu(int num)
35{
36}
37#endif
38
39#endif /* _ASM_ARM_XEN_HYPERVISOR_H */
diff --git a/include/xen/arm/interface.h b/include/xen/arm/interface.h
new file mode 100644
index 000000000000..75d596862892
--- /dev/null
+++ b/include/xen/arm/interface.h
@@ -0,0 +1,85 @@
1/******************************************************************************
2 * Guest OS interface to ARM Xen.
3 *
4 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
5 */
6
7#ifndef _ASM_ARM_XEN_INTERFACE_H
8#define _ASM_ARM_XEN_INTERFACE_H
9
10#include <linux/types.h>
11
12#define uint64_aligned_t uint64_t __attribute__((aligned(8)))
13
14#define __DEFINE_GUEST_HANDLE(name, type) \
15 typedef struct { union { type *p; uint64_aligned_t q; }; } \
16 __guest_handle_ ## name
17
18#define DEFINE_GUEST_HANDLE_STRUCT(name) \
19 __DEFINE_GUEST_HANDLE(name, struct name)
20#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
21#define GUEST_HANDLE(name) __guest_handle_ ## name
22
23#define set_xen_guest_handle(hnd, val) \
24 do { \
25 if (sizeof(hnd) == 8) \
26 *(uint64_t *)&(hnd) = 0; \
27 (hnd).p = val; \
28 } while (0)
29
30#define __HYPERVISOR_platform_op_raw __HYPERVISOR_platform_op
31
32#ifndef __ASSEMBLY__
33/* Explicitly size integers that represent pfns in the interface with
34 * Xen so that we can have one ABI that works for 32 and 64 bit guests.
35 * Note that this means that the xen_pfn_t type may be capable of
36 * representing pfn's which the guest cannot represent in its own pfn
37 * type. However since pfn space is controlled by the guest this is
38 * fine since it simply wouldn't be able to create any sure pfns in
39 * the first place.
40 */
41typedef uint64_t xen_pfn_t;
42#define PRI_xen_pfn "llx"
43typedef uint64_t xen_ulong_t;
44#define PRI_xen_ulong "llx"
45typedef int64_t xen_long_t;
46#define PRI_xen_long "llx"
47/* Guest handles for primitive C types. */
48__DEFINE_GUEST_HANDLE(uchar, unsigned char);
49__DEFINE_GUEST_HANDLE(uint, unsigned int);
50DEFINE_GUEST_HANDLE(char);
51DEFINE_GUEST_HANDLE(int);
52DEFINE_GUEST_HANDLE(void);
53DEFINE_GUEST_HANDLE(uint64_t);
54DEFINE_GUEST_HANDLE(uint32_t);
55DEFINE_GUEST_HANDLE(xen_pfn_t);
56DEFINE_GUEST_HANDLE(xen_ulong_t);
57
58/* Maximum number of virtual CPUs in multi-processor guests. */
59#define MAX_VIRT_CPUS 1
60
61struct arch_vcpu_info { };
62struct arch_shared_info { };
63
64/* TODO: Move pvclock definitions some place arch independent */
65struct pvclock_vcpu_time_info {
66 u32 version;
67 u32 pad0;
68 u64 tsc_timestamp;
69 u64 system_time;
70 u32 tsc_to_system_mul;
71 s8 tsc_shift;
72 u8 flags;
73 u8 pad[2];
74} __attribute__((__packed__)); /* 32 bytes */
75
76/* It is OK to have a 12 bytes struct with no padding because it is packed */
77struct pvclock_wall_clock {
78 u32 version;
79 u32 sec;
80 u32 nsec;
81 u32 sec_hi;
82} __attribute__((__packed__));
83#endif
84
85#endif /* _ASM_ARM_XEN_INTERFACE_H */
diff --git a/include/xen/arm/page-coherent.h b/include/xen/arm/page-coherent.h
new file mode 100644
index 000000000000..95ce6ac3a971
--- /dev/null
+++ b/include/xen/arm/page-coherent.h
@@ -0,0 +1,98 @@
1#ifndef _ASM_ARM_XEN_PAGE_COHERENT_H
2#define _ASM_ARM_XEN_PAGE_COHERENT_H
3
4#include <asm/page.h>
5#include <linux/dma-mapping.h>
6
7void __xen_dma_map_page(struct device *hwdev, struct page *page,
8 dma_addr_t dev_addr, unsigned long offset, size_t size,
9 enum dma_data_direction dir, unsigned long attrs);
10void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
11 size_t size, enum dma_data_direction dir,
12 unsigned long attrs);
13void __xen_dma_sync_single_for_cpu(struct device *hwdev,
14 dma_addr_t handle, size_t size, enum dma_data_direction dir);
15
16void __xen_dma_sync_single_for_device(struct device *hwdev,
17 dma_addr_t handle, size_t size, enum dma_data_direction dir);
18
19static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
20 dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
21{
22 return __generic_dma_ops(hwdev)->alloc(hwdev, size, dma_handle, flags, attrs);
23}
24
25static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
26 void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
27{
28 __generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, attrs);
29}
30
31static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
32 dma_addr_t dev_addr, unsigned long offset, size_t size,
33 enum dma_data_direction dir, unsigned long attrs)
34{
35 unsigned long page_pfn = page_to_xen_pfn(page);
36 unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr);
37 unsigned long compound_pages =
38 (1<<compound_order(page)) * XEN_PFN_PER_PAGE;
39 bool local = (page_pfn <= dev_pfn) &&
40 (dev_pfn - page_pfn < compound_pages);
41
42 /*
43 * Dom0 is mapped 1:1, while the Linux page can span across
44 * multiple Xen pages, it's not possible for it to contain a
45 * mix of local and foreign Xen pages. So if the first xen_pfn
46 * == mfn the page is local otherwise it's a foreign page
47 * grant-mapped in dom0. If the page is local we can safely
48 * call the native dma_ops function, otherwise we call the xen
49 * specific function.
50 */
51 if (local)
52 __generic_dma_ops(hwdev)->map_page(hwdev, page, offset, size, dir, attrs);
53 else
54 __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs);
55}
56
57static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
58 size_t size, enum dma_data_direction dir, unsigned long attrs)
59{
60 unsigned long pfn = PFN_DOWN(handle);
61 /*
62 * Dom0 is mapped 1:1, while the Linux page can be spanned accross
63 * multiple Xen page, it's not possible to have a mix of local and
64 * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a
65 * foreign mfn will always return false. If the page is local we can
66 * safely call the native dma_ops function, otherwise we call the xen
67 * specific function.
68 */
69 if (pfn_valid(pfn)) {
70 if (__generic_dma_ops(hwdev)->unmap_page)
71 __generic_dma_ops(hwdev)->unmap_page(hwdev, handle, size, dir, attrs);
72 } else
73 __xen_dma_unmap_page(hwdev, handle, size, dir, attrs);
74}
75
76static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
77 dma_addr_t handle, size_t size, enum dma_data_direction dir)
78{
79 unsigned long pfn = PFN_DOWN(handle);
80 if (pfn_valid(pfn)) {
81 if (__generic_dma_ops(hwdev)->sync_single_for_cpu)
82 __generic_dma_ops(hwdev)->sync_single_for_cpu(hwdev, handle, size, dir);
83 } else
84 __xen_dma_sync_single_for_cpu(hwdev, handle, size, dir);
85}
86
87static inline void xen_dma_sync_single_for_device(struct device *hwdev,
88 dma_addr_t handle, size_t size, enum dma_data_direction dir)
89{
90 unsigned long pfn = PFN_DOWN(handle);
91 if (pfn_valid(pfn)) {
92 if (__generic_dma_ops(hwdev)->sync_single_for_device)
93 __generic_dma_ops(hwdev)->sync_single_for_device(hwdev, handle, size, dir);
94 } else
95 __xen_dma_sync_single_for_device(hwdev, handle, size, dir);
96}
97
98#endif /* _ASM_ARM_XEN_PAGE_COHERENT_H */
diff --git a/include/xen/arm/page.h b/include/xen/arm/page.h
new file mode 100644
index 000000000000..415dbc6e43fd
--- /dev/null
+++ b/include/xen/arm/page.h
@@ -0,0 +1,122 @@
1#ifndef _ASM_ARM_XEN_PAGE_H
2#define _ASM_ARM_XEN_PAGE_H
3
4#include <asm/page.h>
5#include <asm/pgtable.h>
6
7#include <linux/pfn.h>
8#include <linux/types.h>
9#include <linux/dma-mapping.h>
10
11#include <xen/xen.h>
12#include <xen/interface/grant_table.h>
13
14#define phys_to_machine_mapping_valid(pfn) (1)
15
16/* Xen machine address */
17typedef struct xmaddr {
18 phys_addr_t maddr;
19} xmaddr_t;
20
21/* Xen pseudo-physical address */
22typedef struct xpaddr {
23 phys_addr_t paddr;
24} xpaddr_t;
25
26#define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
27#define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
28
29#define INVALID_P2M_ENTRY (~0UL)
30
31/*
32 * The pseudo-physical frame (pfn) used in all the helpers is always based
33 * on Xen page granularity (i.e 4KB).
34 *
35 * A Linux page may be split across multiple non-contiguous Xen page so we
36 * have to keep track with frame based on 4KB page granularity.
37 *
38 * PV drivers should never make a direct usage of those helpers (particularly
39 * pfn_to_gfn and gfn_to_pfn).
40 */
41
42unsigned long __pfn_to_mfn(unsigned long pfn);
43extern struct rb_root phys_to_mach;
44
45/* Pseudo-physical <-> Guest conversion */
46static inline unsigned long pfn_to_gfn(unsigned long pfn)
47{
48 return pfn;
49}
50
51static inline unsigned long gfn_to_pfn(unsigned long gfn)
52{
53 return gfn;
54}
55
56/* Pseudo-physical <-> BUS conversion */
57static inline unsigned long pfn_to_bfn(unsigned long pfn)
58{
59 unsigned long mfn;
60
61 if (phys_to_mach.rb_node != NULL) {
62 mfn = __pfn_to_mfn(pfn);
63 if (mfn != INVALID_P2M_ENTRY)
64 return mfn;
65 }
66
67 return pfn;
68}
69
70static inline unsigned long bfn_to_pfn(unsigned long bfn)
71{
72 return bfn;
73}
74
75#define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn)
76
77/* VIRT <-> GUEST conversion */
78#define virt_to_gfn(v) (pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT))
79#define gfn_to_virt(m) (__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT))
80
81/* Only used in PV code. But ARM guests are always HVM. */
82static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
83{
84 BUG();
85}
86
87/* TODO: this shouldn't be here but it is because the frontend drivers
88 * are using it (its rolled in headers) even though we won't hit the code path.
89 * So for right now just punt with this.
90 */
91static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
92{
93 BUG();
94 return NULL;
95}
96
97extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
98 struct gnttab_map_grant_ref *kmap_ops,
99 struct page **pages, unsigned int count);
100
101extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
102 struct gnttab_unmap_grant_ref *kunmap_ops,
103 struct page **pages, unsigned int count);
104
105bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
106bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
107 unsigned long nr_pages);
108
109static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
110{
111 return __set_phys_to_machine(pfn, mfn);
112}
113
114#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
115#define xen_unmap(cookie) iounmap((cookie))
116
117bool xen_arch_need_swiotlb(struct device *dev,
118 phys_addr_t phys,
119 dma_addr_t dev_addr);
120unsigned long xen_get_swiotlb_free_pages(unsigned int order);
121
122#endif /* _ASM_ARM_XEN_PAGE_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-24 22:43:46 -0400