/*
* Copyright (c) 2016, Citrix Systems Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __XEN_PUBLIC_HVM_DM_OP_H__
#define __XEN_PUBLIC_HVM_DM_OP_H__
#include "../xen.h"
#if defined(__XEN__) || defined(__XEN_TOOLS__)
#include "../event_channel.h"
#ifndef uint64_aligned_t
#define uint64_aligned_t uint64_t
#endif
/*
* IOREQ Servers
*
* The interface between an I/O emulator an Xen is called an IOREQ Server.
* A domain supports a single 'legacy' IOREQ Server which is instantiated if
* parameter...
*
* HVM_PARAM_IOREQ_PFN is read (to get the gmfn containing the synchronous
* ioreq structures), or...
* HVM_PARAM_BUFIOREQ_PFN is read (to get the gmfn containing the buffered
* ioreq ring), or...
* HVM_PARAM_BUFIOREQ_EVTCHN is read (to get the event channel that Xen uses
* to request buffered I/O emulation).
*
* The following hypercalls facilitate the creation of IOREQ Servers for
* 'secondary' emulators which are invoked to implement port I/O, memory, or
* PCI config space ranges which they explicitly register.
*/
typedef uint16_t ioservid_t;
/*
* XEN_DMOP_create_ioreq_server: Instantiate a new IOREQ Server for a
* secondary emulator.
*
* The <id> handed back is unique for target domain. The valur of
* <handle_bufioreq> should be one of HVM_IOREQSRV_BUFIOREQ_* defined in
* hvm_op.h. If the value is HVM_IOREQSRV_BUFIOREQ_OFF then the buffered
* ioreq ring will not be allocated and hence all emulation requests to
* this server will be synchronous.
*/
#define XEN_DMOP_create_ioreq_server 1
struct xen_dm_op_create_ioreq_server {
/* IN - should server handle buffered ioreqs */
uint8_t handle_bufioreq;
uint8_t pad[3];
/* OUT - server id */
ioservid_t id;
};
/*
* XEN_DMOP_get_ioreq_server_info: Get all the information necessary to
* access IOREQ Server <id>.
*
* The emulator needs to map the synchronous ioreq structures and buffered
* ioreq ring (if it exists) that Xen uses to request emulation. These are
* hosted in the target domain's gmfns <ioreq_pfn> and <bufioreq_pfn>
* respectively. In addition, if the IOREQ Server is handling buffered
* emulation requests, the emulator needs to bind to event channel
* <bufioreq_port> to listen for them. (The event channels used for
* synchronous emulation requests are specified in the per-CPU ioreq
* structures in <ioreq_pfn>).
* If the IOREQ Server is not handling buffered emulation requests then the
* values handed back in <bufioreq_pfn> and <bufioreq_port> will both be 0.
*/
#define XEN_DMOP_get_ioreq_server_info 2
struct xen_dm_op_get_ioreq_server_info {
/* IN - server id */
ioservid_t id;
uint16_t pad;
/* OUT - buffered ioreq port */
evtchn_port_t bufioreq_port;
/* OUT - sync ioreq pfn */
uint64_aligned_t ioreq_pfn;
/* OUT - buffered ioreq pfn */
uint64_aligned_t bufioreq_pfn;
};
/*
* XEN_DMOP_map_io_range_to_ioreq_server: Register an I/O range for
* emulation by the client of
* IOREQ Server <id>.
* XEN_DMOP_unmap_io_range_from_ioreq_server: Deregister an I/O range
* previously registered for
* emulation by the client of
* IOREQ Server <id>.
*
* There are three types of I/O that can be emulated: port I/O, memory
* accesses and PCI config space accesses. The <type> field denotes which
* type of range* the <start> and <end> (inclusive) fields are specifying.
* PCI config space ranges are specified by segment/bus/device/function
* values which should be encoded using the DMOP_PCI_SBDF helper macro
* below.
*
* NOTE: unless an emulation request falls entirely within a range mapped
* by a secondary emulator, it will not be passed to that emulator.
*/
#define XEN_DMOP_map_io_range_to_ioreq_server 3
#define XEN_DMOP_unmap_io_range_from_ioreq_server 4
struct xen_dm_op_ioreq_server_range {
/* IN - server id */
ioservid_t id;
uint16_t pad;
/* IN - type of range */
uint32_t type;
# define XEN_DMOP_IO_RANGE_PORT 0 /* I/O port range */
# define XEN_DMOP_IO_RANGE_MEMORY 1 /* MMIO range */
# define XEN_DMOP_IO_RANGE_PCI 2 /* PCI segment/bus/dev/func range */
/* IN - inclusive start and end of range */
uint64_aligned_t start, end;
};
#define XEN_DMOP_PCI_SBDF(s,b,d,f) \
((((s) & 0xffff) << 16) | \
(((b) & 0xff) << 8) | \
(((d) & 0x1f) << 3) | \
((f) & 0x07))
/*
* XEN_DMOP_set_ioreq_server_state: Enable or disable the IOREQ Server <id>
*
* The IOREQ Server will not be passed any emulation requests until it is
* in the enabled state.
* Note that the contents of the ioreq_pfn and bufioreq_fn (see
* XEN_DMOP_get_ioreq_server_info) are not meaningful until the IOREQ Server
* is in the enabled state.
*/
#define XEN_DMOP_set_ioreq_server_state 5
struct xen_dm_op_set_ioreq_server_state {
/* IN - server id */
ioservid_t id;
/* IN - enabled? */
uint8_t enabled;
uint8_t pad;
};
/*
* XEN_DMOP_destroy_ioreq_server: Destroy the IOREQ Server <id>.
*
* Any registered I/O ranges will be automatically deregistered.
*/
#define XEN_DMOP_destroy_ioreq_server 6
struct xen_dm_op_destroy_ioreq_server {
/* IN - server id */
ioservid_t id;
uint16_t pad;
};
/*
* XEN_DMOP_track_dirty_vram: Track modifications to the specified pfn
* range.
*
* NOTE: The bitmap passed back to the caller is passed in a
* secondary buffer.
*/
#define XEN_DMOP_track_dirty_vram 7
struct xen_dm_op_track_dirty_vram {
/* IN - number of pages to be tracked */
uint32_t nr;
uint32_t pad;
/* IN - first pfn to track */
uint64_aligned_t first_pfn;
};
/*
* XEN_DMOP_set_pci_intx_level: Set the logical level of one of a domain's
* PCI INTx pins.
*/
#define XEN_DMOP_set_pci_intx_level 8
struct xen_dm_op_set_pci_intx_level {
/* IN - PCI INTx identification (domain:bus:device:intx) */
uint16_t domain;
uint8_t bus, device, intx;
/* IN - Level: 0 -> deasserted, 1 -> asserted */
uint8_t level;
};
/*
* XEN_DMOP_set_isa_irq_level: Set the logical level of a one of a domain's
* ISA IRQ lines.
*/
#define XEN_DMOP_set_isa_irq_level 9
struct xen_dm_op_set_isa_irq_level {
/* IN - ISA IRQ (0-15) */
uint8_t isa_irq;
/* IN - Level: 0 -> deasserted, 1 -> asserted */
uint8_t level;
};
/*
* XEN_DMOP_set_pci_link_route: Map a PCI INTx line to an IRQ line.
*/
#define XEN_DMOP_set_pci_link_route 10
struct xen_dm_op_set_pci_link_route {
/* PCI INTx line (0-3) */
uint8_t link;
/* ISA IRQ (1-15) or 0 -> disable link */
uint8_t isa_irq;
};
/*
* XEN_DMOP_modified_memory: Notify that a set of pages were modified by
* an emulator.
*
* DMOP buf 1 contains an array of xen_dm_op_modified_memory_extent with
* @nr_extents entries.
*
* On error, @nr_extents will contain the index+1 of the extent that
* had the error. It is not defined if or which pages may have been
* marked as dirty, in this event.
*/
#define XEN_DMOP_modified_memory 11
struct xen_dm_op_modified_memory {
/*
* IN - Number of extents to be processed
* OUT -returns n+1 for failing extent
*/
uint32_t nr_extents;
/* IN/OUT - Must be set to 0 */
uint32_t opaque;
};
struct xen_dm_op_modified_memory_extent {
/* IN - number of contiguous pages modified */
uint32_t nr;
uint32_t pad;
/* IN - first pfn modified */
uint64_aligned_t first_pfn;
};
/*
* XEN_DMOP_set_mem_type: Notify that a region of memory is to be treated
* in a specific way. (See definition of
* hvmmem_type_t).
*
* NOTE: In the event of a continuation (return code -ERESTART), the
* @first_pfn is set to the value of the pfn of the remaining
* region and @nr reduced to the size of the remaining region.
*/
#define XEN_DMOP_set_mem_type 12
struct xen_dm_op_set_mem_type {
/* IN - number of contiguous pages */
uint32_t nr;
/* IN - new hvmmem_type_t of region */
uint16_t mem_type;
uint16_t pad;
/* IN - first pfn in region */
uint64_aligned_t first_pfn;
};
/*
* XEN_DMOP_inject_event: Inject an event into a VCPU, which will
* get taken up when it is next scheduled.
*
* Note that the caller should know enough of the state of the CPU before
* injecting, to know what the effect of injecting the event will be.
*/
#define XEN_DMOP_inject_event 13
struct xen_dm_op_inject_event {
/* IN - index of vCPU */
uint32_t vcpuid;
/* IN - interrupt vector */
uint8_t vector;
/* IN - event type (DMOP_EVENT_* ) */
uint8_t type;
/* NB. This enumeration precisely matches hvm.h:X86_EVENTTYPE_* */
# define XEN_DMOP_EVENT_ext_int 0 /* external interrupt */
# define XEN_DMOP_EVENT_nmi 2 /* nmi */
# define XEN_DMOP_EVENT_hw_exc 3 /* hardware exception */
# define XEN_DMOP_EVENT_sw_int 4 /* software interrupt (CD nn) */
# define XEN_DMOP_EVENT_pri_sw_exc 5 /* ICEBP (F1) */
# define XEN_DMOP_EVENT_sw_exc 6 /* INT3 (CC), INTO (CE) */
/* IN - instruction length */
uint8_t insn_len;
uint8_t pad0;
/* IN - error code (or ~0 to skip) */
uint32_t error_code;
uint32_t pad1;
/* IN - CR2 for page faults */
uint64_aligned_t cr2;
};
/*
* XEN_DMOP_inject_msi: Inject an MSI for an emulated device.
*/
#define XEN_DMOP_inject_msi 14
struct xen_dm_op_inject_msi {
/* IN - MSI data (lower 32 bits) */
uint32_t data;
uint32_t pad;
/* IN - MSI address (0xfeexxxxx) */
uint64_aligned_t addr;
};
/*
* XEN_DMOP_map_mem_type_to_ioreq_server : map or unmap the IOREQ Server <id>
* to specific memory type <type>
* for specific accesses <flags>
*
* For now, flags only accept the value of XEN_DMOP_IOREQ_MEM_ACCESS_WRITE,
* which means only write operations are to be forwarded to an ioreq server.
* Support for the emulation of read operations can be added when an ioreq
* server has such requirement in future.
*/
#define XEN_DMOP_map_mem_type_to_ioreq_server 15
struct xen_dm_op_map_mem_type_to_ioreq_server {
ioservid_t id; /* IN - ioreq server id */
uint16_t type; /* IN - memory type */
uint32_t flags; /* IN - types of accesses to be forwarded to the
ioreq server. flags with 0 means to unmap the
ioreq server */
#define XEN_DMOP_IOREQ_MEM_ACCESS_READ (1u << 0)
#define XEN_DMOP_IOREQ_MEM_ACCESS_WRITE (1u << 1)
uint64_t opaque; /* IN/OUT - only used for hypercall continuation,
has to be set to zero by the caller */
};
struct xen_dm_op {
uint32_t op;
uint32_t pad;
union {
struct xen_dm_op_create_ioreq_server create_ioreq_server;
struct xen_dm_op_get_ioreq_server_info get_ioreq_server_info;
struct xen_dm_op_ioreq_server_range map_io_range_to_ioreq_server;
struct xen_dm_op_ioreq_server_range unmap_io_range_from_ioreq_server;
struct xen_dm_op_set_ioreq_server_state set_ioreq_server_state;
struct xen_dm_op_destroy_ioreq_server destroy_ioreq_server;
struct xen_dm_op_track_dirty_vram track_dirty_vram;
struct xen_dm_op_set_pci_intx_level set_pci_intx_level;
struct xen_dm_op_set_isa_irq_level set_isa_irq_level;
struct xen_dm_op_set_pci_link_route set_pci_link_route;
struct xen_dm_op_modified_memory modified_memory;
struct xen_dm_op_set_mem_type set_mem_type;
struct xen_dm_op_inject_event inject_event;
struct xen_dm_op_inject_msi inject_msi;
struct xen_dm_op_map_mem_type_to_ioreq_server
map_mem_type_to_ioreq_server;
} u;
};
#endif /* __XEN__ || __XEN_TOOLS__ */
struct xen_dm_op_buf {
XEN_GUEST_HANDLE(void) h;
xen_ulong_t size;
};
typedef struct xen_dm_op_buf xen_dm_op_buf_t;
DEFINE_XEN_GUEST_HANDLE(xen_dm_op_buf_t);
/* ` enum neg_errnoval
* ` HYPERVISOR_dm_op(domid_t domid,
* ` unsigned int nr_bufs,
* ` xen_dm_op_buf_t bufs[])
* ` [see __HYPERVISOR_dm_op]
* `
*
* @domid is the domain the hypercall operates on.
* @nr_bufs is the number of buffers in the @bufs array.
* @bufs points to an array of buffers where @bufs[0] contains a struct
* xen_dm_op, describing the specific device model operation and its
* parameters.
* @bufs[1..] may be referenced in the parameters for the purposes of
* passing extra information to or from the domain.
*/
#endif /* __XEN_PUBLIC_HVM_DM_OP_H__ */
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/