diff options
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/balloon.h | 5 | ||||
| -rw-r--r-- | include/xen/interface/hvm/start_info.h | 63 | ||||
| -rw-r--r-- | include/xen/xen-front-pgdir-shbuf.h | 89 | ||||
| -rw-r--r-- | include/xen/xen-ops.h | 12 | ||||
| -rw-r--r-- | include/xen/xen.h | 3 |
5 files changed, 161 insertions, 11 deletions
diff --git a/include/xen/balloon.h b/include/xen/balloon.h index 61f410fd74e4..4914b93a23f2 100644 --- a/include/xen/balloon.h +++ b/include/xen/balloon.h @@ -44,8 +44,3 @@ static inline void xen_balloon_init(void) { } #endif - -#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG -struct resource; -void arch_xen_balloon_init(struct resource *hostmem_resource); -#endif diff --git a/include/xen/interface/hvm/start_info.h b/include/xen/interface/hvm/start_info.h index 648415976ead..50af9ea2ff1e 100644 --- a/include/xen/interface/hvm/start_info.h +++ b/include/xen/interface/hvm/start_info.h @@ -33,7 +33,7 @@ * | magic | Contains the magic value XEN_HVM_START_MAGIC_VALUE * | | ("xEn3" with the 0x80 bit of the "E" set). * 4 +----------------+ - * | version | Version of this structure. Current version is 0. New + * | version | Version of this structure. Current version is 1. New * | | versions are guaranteed to be backwards-compatible. * 8 +----------------+ * | flags | SIF_xxx flags. @@ -48,6 +48,15 @@ * 32 +----------------+ * | rsdp_paddr | Physical address of the RSDP ACPI data structure. * 40 +----------------+ + * | memmap_paddr | Physical address of the (optional) memory map. Only + * | | present in version 1 and newer of the structure. + * 48 +----------------+ + * | memmap_entries | Number of entries in the memory map table. Zero + * | | if there is no memory map being provided. Only + * | | present in version 1 and newer of the structure. + * 52 +----------------+ + * | reserved | Version 1 and newer only. + * 56 +----------------+ * * The layout of each entry in the module structure is the following: * @@ -62,14 +71,52 @@ * | reserved | * 32 +----------------+ * + * The layout of each entry in the memory map table is as follows: + * + * 0 +----------------+ + * | addr | Base address + * 8 +----------------+ + * | size | Size of mapping in bytes + * 16 +----------------+ + * | type | Type of mapping as defined between the hypervisor + * | | and guest. See XEN_HVM_MEMMAP_TYPE_* values below. + * 20 +----------------| + * | reserved | + * 24 +----------------+ + * * The address and sizes are always a 64bit little endian unsigned integer. * * NB: Xen on x86 will always try to place all the data below the 4GiB * boundary. + * + * Version numbers of the hvm_start_info structure have evolved like this: + * + * Version 0: Initial implementation. + * + * Version 1: Added the memmap_paddr/memmap_entries fields (plus 4 bytes of + * padding) to the end of the hvm_start_info struct. These new + * fields can be used to pass a memory map to the guest. The + * memory map is optional and so guests that understand version 1 + * of the structure must check that memmap_entries is non-zero + * before trying to read the memory map. */ #define XEN_HVM_START_MAGIC_VALUE 0x336ec578 /* + * The values used in the type field of the memory map table entries are + * defined below and match the Address Range Types as defined in the "System + * Address Map Interfaces" section of the ACPI Specification. Please refer to + * section 15 in version 6.2 of the ACPI spec: http://uefi.org/specifications + */ +#define XEN_HVM_MEMMAP_TYPE_RAM 1 +#define XEN_HVM_MEMMAP_TYPE_RESERVED 2 +#define XEN_HVM_MEMMAP_TYPE_ACPI 3 +#define XEN_HVM_MEMMAP_TYPE_NVS 4 +#define XEN_HVM_MEMMAP_TYPE_UNUSABLE 5 +#define XEN_HVM_MEMMAP_TYPE_DISABLED 6 +#define XEN_HVM_MEMMAP_TYPE_PMEM 7 + +/* * C representation of the x86/HVM start info layout. * * The canonical definition of this layout is above, this is just a way to @@ -86,6 +133,13 @@ struct hvm_start_info { uint64_t cmdline_paddr; /* Physical address of the command line. */ uint64_t rsdp_paddr; /* Physical address of the RSDP ACPI data */ /* structure. */ + /* All following fields only present in version 1 and newer */ + uint64_t memmap_paddr; /* Physical address of an array of */ + /* hvm_memmap_table_entry. */ + uint32_t memmap_entries; /* Number of entries in the memmap table. */ + /* Value will be zero if there is no memory */ + /* map being provided. */ + uint32_t reserved; /* Must be zero. */ }; struct hvm_modlist_entry { @@ -95,4 +149,11 @@ struct hvm_modlist_entry { uint64_t reserved; }; +struct hvm_memmap_table_entry { + uint64_t addr; /* Base address of the memory region */ + uint64_t size; /* Size of the memory region in bytes */ + uint32_t type; /* Mapping type */ + uint32_t reserved; /* Must be zero for Version 1. */ +}; + #endif /* __XEN_PUBLIC_ARCH_X86_HVM_START_INFO_H__ */ diff --git a/include/xen/xen-front-pgdir-shbuf.h b/include/xen/xen-front-pgdir-shbuf.h new file mode 100644 index 000000000000..150ef7ec51ec --- /dev/null +++ b/include/xen/xen-front-pgdir-shbuf.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ + +/* + * Xen frontend/backend page directory based shared buffer + * helper module. + * + * Copyright (C) 2018 EPAM Systems Inc. + * + * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> + */ + +#ifndef __XEN_FRONT_PGDIR_SHBUF_H_ +#define __XEN_FRONT_PGDIR_SHBUF_H_ + +#include <linux/kernel.h> + +#include <xen/grant_table.h> + +struct xen_front_pgdir_shbuf_ops; + +struct xen_front_pgdir_shbuf { + /* + * Number of references granted for the backend use: + * + * - for frontend allocated/imported buffers this holds the number + * of grant references for the page directory and the pages + * of the buffer + * + * - for the buffer provided by the backend this only holds the number + * of grant references for the page directory itself as grant + * references for the buffer will be provided by the backend. + */ + int num_grefs; + grant_ref_t *grefs; + /* Page directory backing storage. */ + u8 *directory; + + /* + * Number of pages for the shared buffer itself (excluding the page + * directory). + */ + int num_pages; + /* + * Backing storage of the shared buffer: these are the pages being + * shared. + */ + struct page **pages; + + struct xenbus_device *xb_dev; + + /* These are the ops used internally depending on be_alloc mode. */ + const struct xen_front_pgdir_shbuf_ops *ops; + + /* Xen map handles for the buffer allocated by the backend. */ + grant_handle_t *backend_map_handles; +}; + +struct xen_front_pgdir_shbuf_cfg { + struct xenbus_device *xb_dev; + + /* Number of pages of the buffer backing storage. */ + int num_pages; + /* Pages of the buffer to be shared. */ + struct page **pages; + + /* + * This is allocated outside because there are use-cases when + * the buffer structure is allocated as a part of a bigger one. + */ + struct xen_front_pgdir_shbuf *pgdir; + /* + * Mode of grant reference sharing: if set then backend will share + * grant references to the buffer with the frontend. + */ + int be_alloc; +}; + +int xen_front_pgdir_shbuf_alloc(struct xen_front_pgdir_shbuf_cfg *cfg); + +grant_ref_t +xen_front_pgdir_shbuf_get_dir_start(struct xen_front_pgdir_shbuf *buf); + +int xen_front_pgdir_shbuf_map(struct xen_front_pgdir_shbuf *buf); + +int xen_front_pgdir_shbuf_unmap(struct xen_front_pgdir_shbuf *buf); + +void xen_front_pgdir_shbuf_free(struct xen_front_pgdir_shbuf *buf); + +#endif /* __XEN_FRONT_PGDIR_SHBUF_H_ */ diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h index 18803ff76e27..4969817124a8 100644 --- a/include/xen/xen-ops.h +++ b/include/xen/xen-ops.h @@ -42,16 +42,12 @@ int xen_setup_shutdown_event(void); extern unsigned long *xen_contiguous_bitmap; -#ifdef CONFIG_XEN_PV +#if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, unsigned int address_bits, dma_addr_t *dma_handle); void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); - -int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, - xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, - unsigned int domid, bool no_translate, struct page **pages); #else static inline int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, @@ -63,7 +59,13 @@ static inline int xen_create_contiguous_region(phys_addr_t pstart, static inline void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order) { } +#endif +#if defined(CONFIG_XEN_PV) +int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, + xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, + unsigned int domid, bool no_translate, struct page **pages); +#else static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr, xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot, unsigned int domid, diff --git a/include/xen/xen.h b/include/xen/xen.h index d7a2678da77f..0e2156786ad2 100644 --- a/include/xen/xen.h +++ b/include/xen/xen.h @@ -29,6 +29,9 @@ extern bool xen_pvh; extern uint32_t xen_start_flags; +#include <xen/interface/hvm/start_info.h> +extern struct hvm_start_info pvh_start_info; + #ifdef CONFIG_XEN_DOM0 #include <xen/interface/xen.h> #include <asm/xen/hypervisor.h> |