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xen/tools/libxc/xc.h
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cl349@firebug.cl.cam.ac.uk 1b8d0b8824 Initialize the xenstore MFN for VMX domains 
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
2005-08-10 08:44:58 +00:00

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C
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/******************************************************************************
* xc.h
*
* A library for low-level access to the Xen control interfaces.
*
* Copyright (c) 2003-2004, K A Fraser.
*/
#ifndef __XC_H__
#define __XC_H__
#include <stdint.h>
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
typedef int8_t s8;
typedef int16_t s16;
typedef int32_t s32;
typedef int64_t s64;
#include <sys/ptrace.h>
#include <xen/xen.h>
#include <xen/dom0_ops.h>
#include <xen/event_channel.h>
#include <xen/sched_ctl.h>
#include <xen/acm.h>
#ifdef __ia64__
#define XC_PAGE_SHIFT 14
#else
#define XC_PAGE_SHIFT 12
#endif
#define XC_PAGE_SIZE (1UL << XC_PAGE_SHIFT)
#define XC_PAGE_MASK (~(XC_PAGE_SIZE-1))
/*
* DEFINITIONS FOR CPU BARRIERS
*/
#if defined(__i386__)
#define mb() __asm__ __volatile__ ( "lock; addl $0,0(%%esp)" : : : "memory" )
#define rmb() __asm__ __volatile__ ( "lock; addl $0,0(%%esp)" : : : "memory" )
#define wmb() __asm__ __volatile__ ( "" : : : "memory")
#elif defined(__x86_64__)
#define mb() __asm__ __volatile__ ( "mfence" : : : "memory")
#define rmb() __asm__ __volatile__ ( "lfence" : : : "memory")
#define wmb() __asm__ __volatile__ ( "" : : : "memory")
#elif defined(__ia64__)
/* FIXME */
#define mb()
#define rmb()
#define wmb()
#else
#error "Define barriers"
#endif
/*
* INITIALIZATION FUNCTIONS
*/
/**
* This function opens a handle to the hypervisor interface. This function can
* be called multiple times within a single process. Multiple processes can
* have an open hypervisor interface at the same time.
*
* Each call to this function should have a corresponding call to
* xc_interface_close().
*
* This function can fail if the caller does not have superuser permission or
* if a Xen-enabled kernel is not currently running.
*
* @return a handle to the hypervisor interface or -1 on failure
*/
int xc_interface_open(void);
/**
* This function closes an open hypervisor interface.
*
* This function can fail if the handle does not represent an open interface or
* if there were problems closing the interface.
*
* @parm xc_handle a handle to an open hypervisor interface
* @return 0 on success, -1 otherwise.
*/
int xc_interface_close(int xc_handle);
/*
* DOMAIN DEBUGGING FUNCTIONS
*/
typedef struct xc_core_header {
unsigned int xch_magic;
unsigned int xch_nr_vcpus;
unsigned int xch_nr_pages;
unsigned int xch_ctxt_offset;
unsigned int xch_index_offset;
unsigned int xch_pages_offset;
} xc_core_header_t;
long xc_ptrace(enum __ptrace_request request,
u32 domid,
long addr,
long data);
long xc_ptrace_core(enum __ptrace_request request,
u32 domid,
long addr,
long data);
int xc_waitdomain(int domain,
int *status,
int options);
int xc_waitdomain_core(int domain,
int *status,
int options);
/*
* DOMAIN MANAGEMENT FUNCTIONS
*/
typedef struct {
u32 domid;
u32 ssidref;
unsigned int dying:1, crashed:1, shutdown:1,
paused:1, blocked:1, running:1;
unsigned int shutdown_reason; /* only meaningful if shutdown==1 */
unsigned long nr_pages;
unsigned long shared_info_frame;
u64 cpu_time;
unsigned long max_memkb;
unsigned int vcpus;
s32 vcpu_to_cpu[MAX_VIRT_CPUS];
cpumap_t cpumap[MAX_VIRT_CPUS];
} xc_dominfo_t;
typedef dom0_getdomaininfo_t xc_domaininfo_t;
int xc_domain_create(int xc_handle,
u32 ssidref,
u32 *pdomid);
int xc_domain_dumpcore(int xc_handle,
u32 domid,
const char *corename);
/**
* This function pauses a domain. A paused domain still exists in memory
* however it does not receive any timeslices from the hypervisor.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm domid the domain id to pause
* @return 0 on success, -1 on failure.
*/
int xc_domain_pause(int xc_handle,
u32 domid);
/**
* This function unpauses a domain. The domain should have been previously
* paused.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm domid the domain id to unpause
* return 0 on success, -1 on failure
*/
int xc_domain_unpause(int xc_handle,
u32 domid);
/**
* This function will destroy a domain. Destroying a domain removes the domain
* completely from memory. This function should be called after sending the
* domain a SHUTDOWN control message to free up the domain resources.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm domid the domain id to destroy
* @return 0 on success, -1 on failure
*/
int xc_domain_destroy(int xc_handle,
u32 domid);
int xc_domain_pincpu(int xc_handle,
u32 domid,
int vcpu,
cpumap_t *cpumap);
/**
* This function will return information about one or more domains. It is
* designed to iterate over the list of domains. If a single domain is
* requested, this function will return the next domain in the list - if
* one exists. It is, therefore, important in this case to make sure the
* domain requested was the one returned.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm first_domid the first domain to enumerate information from. Domains
* are currently enumerate in order of creation.
* @parm max_doms the number of elements in info
* @parm info an array of max_doms size that will contain the information for
* the enumerated domains.
* @return the number of domains enumerated or -1 on error
*/
int xc_domain_getinfo(int xc_handle,
u32 first_domid,
unsigned int max_doms,
xc_dominfo_t *info);
/**
* This function will return information about one or more domains, using a
* single hypercall. The domain information will be stored into the supplied
* array of xc_domaininfo_t structures.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm first_domain the first domain to enumerate information from.
* Domains are currently enumerate in order of creation.
* @parm max_domains the number of elements in info
* @parm info an array of max_doms size that will contain the information for
* the enumerated domains.
* @return the number of domains enumerated or -1 on error
*/
int xc_domain_getinfolist(int xc_handle,
u32 first_domain,
unsigned int max_domains,
xc_domaininfo_t *info);
/**
* This function returns information about one domain. This information is
* more detailed than the information from xc_domain_getinfo().
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm domid the domain to get information from
* @parm info a pointer to an xc_domaininfo_t to store the domain information
* @parm ctxt a pointer to a structure to store the execution context of the
* domain
* @return 0 on success, -1 on failure
*/
int xc_domain_get_vcpu_context(int xc_handle,
u32 domid,
u32 vcpu,
vcpu_guest_context_t *ctxt);
int xc_domain_setcpuweight(int xc_handle,
u32 domid,
float weight);
long long xc_domain_get_cpu_usage(int xc_handle,
domid_t domid,
int vcpu);
typedef dom0_shadow_control_stats_t xc_shadow_control_stats_t;
int xc_shadow_control(int xc_handle,
u32 domid,
unsigned int sop,
unsigned long *dirty_bitmap,
unsigned long pages,
xc_shadow_control_stats_t *stats);
#define XCFLAGS_VERBOSE 1
#define XCFLAGS_LIVE 2
#define XCFLAGS_DEBUG 4
#define XCFLAGS_CONFIGURE 8
struct XcIOContext;
/**
* This function will save a domain running Linux.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm fd the file descriptor to save a domain to
* @parm dom the id of the domain
* @return 0 on success, -1 on failure
*/
int xc_linux_save(int xc_handle, int fd, u32 dom);
/**
* This function will restore a saved domain running Linux.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm fd the file descriptor to restore a domain from
* @parm dom the id of the domain
* @parm nr_pfns the number of pages
* @parm store_evtchn the store event channel for this domain to use
* @parm store_mfn returned with the mfn of the store page
* @return 0 on success, -1 on failure
*/
int xc_linux_restore(int xc_handle, int io_fd, u32 dom, unsigned long nr_pfns,
unsigned int store_evtchn, unsigned long *store_mfn);
int xc_linux_build(int xc_handle,
u32 domid,
const char *image_name,
const char *ramdisk_name,
const char *cmdline,
unsigned int control_evtchn,
unsigned long flags,
unsigned int vcpus,
unsigned int store_evtchn,
unsigned long *store_mfn);
struct mem_map;
int xc_vmx_build(int xc_handle,
u32 domid,
int memsize,
const char *image_name,
struct mem_map *memmap,
const char *ramdisk_name,
const char *cmdline,
unsigned int control_evtchn,
unsigned long flags,
unsigned int vcpus,
unsigned int store_evtchn,
unsigned long *store_mfn);
int xc_bvtsched_global_set(int xc_handle,
unsigned long ctx_allow);
int xc_bvtsched_domain_set(int xc_handle,
u32 domid,
u32 mcuadv,
int warpback,
s32 warpvalue,
long long warpl,
long long warpu);
int xc_bvtsched_global_get(int xc_handle,
unsigned long *ctx_allow);
int xc_bvtsched_domain_get(int xc_handle,
u32 domid,
u32 *mcuadv,
int *warpback,
s32 *warpvalue,
long long *warpl,
long long *warpu);
int xc_sedf_domain_set(int xc_handle,
u32 domid,
u64 period, u64 slice, u64 latency, u16 extratime, u16 weight);
int xc_sedf_domain_get(int xc_handle,
u32 domid,
u64* period, u64 *slice, u64 *latency, u16 *extratime, u16* weight);
typedef evtchn_status_t xc_evtchn_status_t;
/*
* EVENT CHANNEL FUNCTIONS
*/
/**
* This function allocates an unbound port. Ports are named endpoints used for
* interdomain communication. This function is most useful in opening a
* well-known port within a domain to receive events on.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm dom the ID of the domain. This maybe DOMID_SELF
* @parm port a pointer to a port. This is an in/out parameter. If *port is
* 0, then a new port will be assigned, if port is > 0 then that
* port is allocated if the port is unallocated.
* @return 0 on success, -1 on failure
*/
int xc_evtchn_alloc_unbound(int xc_handle,
u32 dom,
int *port);
/**
* This function creates a pair of ports between two domains. A port can only
* be bound once within a domain.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm dom1 one of the two domains to connect. Can be DOMID_SELF.
* @parm dom2 the other domain to connect. Can be DOMID_SELF.
* @parm port1 an in/out parameter. If > 0, then try to connect *port. If
* 0, then allocate a new port and store the port in *port.
* @parm port2 the port connected on port2. This parameter behaves the same
* way as port1.
* @return 0 on success, -1 on error.
*/
int xc_evtchn_bind_interdomain(int xc_handle,
u32 dom1,
u32 dom2,
int *port1,
int *port2);
int xc_evtchn_bind_virq(int xc_handle,
int virq,
int *port);
/**
* This function will close a single port on an event channel.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm dom the domain that the port exists on. May be DOMID_SELF.
* @parm port the port to close
* @return 0 on success, -1 on error
*/
int xc_evtchn_close(int xc_handle,
u32 dom, /* may be DOMID_SELF */
int port);
/**
* This function generates a notify event on a bound port.
*
* Notifies can be read within Linux by opening /dev/xen/evtchn and reading
* a 16 bit value. The result will be the port the event occurred on. When
* events occur, the port is masked until the 16 bit port value is written back
* to the file. When /dev/xen/evtchn is opened, it has to be bound via an
* ioctl to each port to listen on. The ioctl for binding is _IO('E', 2). The
* parameter is the port to listen on.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm local_port the port to generate the notify on
* @return 0 on success, -1 on error
*/
int xc_evtchn_send(int xc_handle,
int local_port);
int xc_evtchn_status(int xc_handle,
u32 dom, /* may be DOMID_SELF */
int port,
xc_evtchn_status_t *status);
int xc_physdev_pci_access_modify(int xc_handle,
u32 domid,
int bus,
int dev,
int func,
int enable);
int xc_readconsolering(int xc_handle,
char **pbuffer,
unsigned int *pnr_chars,
int clear);
typedef dom0_physinfo_t xc_physinfo_t;
int xc_physinfo(int xc_handle,
xc_physinfo_t *info);
int xc_sched_id(int xc_handle,
int *sched_id);
int xc_domain_setmaxmem(int xc_handle,
u32 domid,
unsigned int max_memkb);
int xc_domain_memory_increase_reservation(int xc_handle,
u32 domid,
unsigned int mem_kb);
typedef dom0_perfc_desc_t xc_perfc_desc_t;
/* IMPORTANT: The caller is responsible for mlock()'ing the @desc array. */
int xc_perfc_control(int xc_handle,
u32 op,
xc_perfc_desc_t *desc);
/* read/write msr */
long long xc_msr_read(int xc_handle, int cpu_mask, int msr);
int xc_msr_write(int xc_handle, int cpu_mask, int msr, unsigned int low,
unsigned int high);
/**
* Memory maps a range within one domain to a local address range. Mappings
* should be unmapped with munmap and should follow the same rules as mmap
* regarding page alignment. Returns NULL on failure.
*
* In Linux, the ring queue for the control channel is accessible by mapping
* the shared_info_frame (from xc_domain_getinfo()) + 2048. The structure
* stored there is of type control_if_t.
*
* @parm xc_handle a handle on an open hypervisor interface
* @parm dom the domain to map memory from
* @parm size the amount of memory to map (in multiples of page size)
* @parm prot same flag as in mmap().
* @parm mfn the frame address to map.
*/
void *xc_map_foreign_range(int xc_handle, u32 dom,
int size, int prot,
unsigned long mfn );
void *xc_map_foreign_batch(int xc_handle, u32 dom, int prot,
unsigned long *arr, int num );
int xc_get_pfn_list(int xc_handle, u32 domid, unsigned long *pfn_buf,
unsigned long max_pfns);
int xc_ia64_get_pfn_list(int xc_handle, u32 domid, unsigned long *pfn_buf,
unsigned int start_page, unsigned int nr_pages);
/*\
* GRANT TABLE FUNCTIONS
\*/
/**
* This function opens a handle to the more restricted grant table hypervisor
* interface. This may be used where the standard interface is not
* available because the domain is not privileged.
* This function can be called multiple times within a single process.
* Multiple processes can have an open hypervisor interface at the same time.
*
* Each call to this function should have a corresponding call to
* xc_grant_interface_close().
*
* This function can fail if a Xen-enabled kernel is not currently running.
*
* @return a handle to the hypervisor grant table interface or -1 on failure
*/
int xc_grant_interface_open(void);
/**
* This function closes an open grant table hypervisor interface.
*
* This function can fail if the handle does not represent an open interface or
* if there were problems closing the interface.
*
* @parm xc_handle a handle to an open grant table hypervisor interface
* @return 0 on success, -1 otherwise.
*/
int xc_grant_interface_close(int xc_handle);
int xc_gnttab_map_grant_ref(int xc_handle,
memory_t host_virt_addr,
u32 dom,
u16 ref,
u16 flags,
s16 *handle,
memory_t *dev_bus_addr);
int xc_gnttab_unmap_grant_ref(int xc_handle,
memory_t host_virt_addr,
memory_t dev_bus_addr,
u16 handle,
s16 *status);
int xc_gnttab_setup_table(int xc_handle,
u32 dom,
u16 nr_frames,
s16 *status,
memory_t **frame_list);
/* Grant debug builds only: */
int xc_gnttab_dump_table(int xc_handle,
u32 dom,
s16 *status);
/* Get current total pages allocated to a domain. */
long xc_get_tot_pages(int xc_handle, u32 domid);
/* Execute a privileged dom0 operation. */
int xc_dom0_op(int xc_handle, dom0_op_t *op);
/* Initializes the store (for dom0)
remote_port should be the remote end of a bound interdomain channel between
the store and dom0.
This function returns a shared frame that should be passed to
xs_introduce_domain
*/
long xc_init_store(int xc_handle, int remote_port);
#endif /* __XC_H__ */
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