diff options
Diffstat (limited to 'xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/hypervisor-if.h')
| -rw-r--r-- | xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/hypervisor-if.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/hypervisor-if.h b/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/hypervisor-if.h new file mode 100644 index 0000000000..6ecac5848e --- /dev/null +++ b/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/hypervisor-ifs/hypervisor-if.h @@ -0,0 +1,209 @@ +/****************************************************************************** + * hypervisor-if.h + * + * Interface to Xeno hypervisor. + */ + +#include "network.h" +#include "block.h" + +#ifndef __HYPERVISOR_IF_H__ +#define __HYPERVISOR_IF_H__ + +/* + * Virtual addresses beyond this are not modifiable by guest OSes. + * The machine->physical mapping table starts at this address, read-only + * to all domains except DOM0. + */ +#define HYPERVISOR_VIRT_START (0xFC000000UL) +#ifndef machine_to_phys_mapping +#define machine_to_phys_mapping ((unsigned long *)HYPERVISOR_VIRT_START) +#endif + +typedef struct trap_info_st +{ + unsigned char vector; /* exception/interrupt vector */ + unsigned char dpl; /* privilege level */ + unsigned short cs; /* code selector */ + unsigned long address; /* code address */ +} trap_info_t; + + +typedef struct +{ +/* + * PGREQ_XXX: specified in least-significant bits of 'ptr' field. + * All requests specify relevent PTE or PT address in 'ptr'. + * Normal requests specify update value in 'value'. + * Extended requests specify command in least 8 bits of 'value'. + */ +/* A normal page-table update request. */ +#define PGREQ_NORMAL 0 +/* Update an entry in the machine->physical mapping table. */ +#define PGREQ_MPT_UPDATE 1 +/* An extended command. */ +#define PGREQ_EXTENDED_COMMAND 2 +/* DOM0 can make entirely unchecked updates which do not affect refcnts. */ +#define PGREQ_UNCHECKED_UPDATE 3 + unsigned long ptr, val; /* *ptr = val */ +/* Announce a new top-level page table. */ +#define PGEXT_PIN_L1_TABLE 0 +#define PGEXT_PIN_L2_TABLE 1 +#define PGEXT_PIN_L3_TABLE 2 +#define PGEXT_PIN_L4_TABLE 3 +#define PGEXT_UNPIN_TABLE 4 +#define PGEXT_NEW_BASEPTR 5 +#define PGEXT_TLB_FLUSH 6 +#define PGEXT_INVLPG 7 +#define PGEXT_CMD_MASK 255 +#define PGEXT_CMD_SHIFT 8 +} page_update_request_t; + + +/* + * Segment descriptor tables. + */ +/* 8 entries, plus a TSS entry for each CPU (up to 32 CPUs). */ +#define FIRST_DOMAIN_GDT_ENTRY 40 +/* These are flat segments for domain bootstrap and fallback. */ +#define FLAT_RING1_CS 0x11 +#define FLAT_RING1_DS 0x19 +#define FLAT_RING3_CS 0x23 +#define FLAT_RING3_DS 0x2b + + +/* EAX = vector; EBX, ECX, EDX, ESI, EDI = args 1, 2, 3, 4, 5. */ + +#define __HYPERVISOR_set_trap_table 0 +#define __HYPERVISOR_pt_update 1 +#define __HYPERVISOR_console_write 2 +#define __HYPERVISOR_set_gdt 3 +#define __HYPERVISOR_stack_and_ldt_switch 4 +#define __HYPERVISOR_net_update 5 +#define __HYPERVISOR_fpu_taskswitch 6 +#define __HYPERVISOR_sched_op 7 +#define __HYPERVISOR_exit 8 +#define __HYPERVISOR_dom0_op 9 +#define __HYPERVISOR_network_op 10 +#define __HYPERVISOR_block_io_op 11 +#define __HYPERVISOR_set_debugreg 12 +#define __HYPERVISOR_get_debugreg 13 +#define __HYPERVISOR_update_descriptor 14 +#define __HYPERVISOR_set_fast_trap 15 + +#define TRAP_INSTR "int $0x82" + + +/* Event message note: + * + * Here, as in the interrupts to the guestos, additional network interfaces + * are defined. These definitions server as placeholders for the event bits, + * however, in the code these events will allways be referred to as shifted + * offsets from the base NET events. + */ + +/* Events that a guest OS may receive from the hypervisor. */ +#define EVENT_BLK_RESP 0x01 /* A block device response has been queued. */ +#define EVENT_TIMER 0x02 /* A timeout has been updated. */ +#define EVENT_DIE 0x04 /* OS is about to be killed. Clean up please! */ +#define EVENT_DEBUG 0x08 /* Request guest to dump debug info (gross!) */ +#define EVENT_NET_TX 0x10 /* There are packets for transmission. */ +#define EVENT_NET_RX 0x20 /* There are empty buffers for receive. */ + +/* Bit offsets, as opposed to the above masks. */ +#define _EVENT_BLK_RESP 0 +#define _EVENT_TIMER 1 +#define _EVENT_DIE 2 +#define _EVENT_NET_TX 3 +#define _EVENT_NET_RX 4 +#define _EVENT_DEBUG 5 + + +/* + * NB. We expect that this struct is smaller than a page. + */ +typedef struct shared_info_st { + + /* Bitmask of outstanding event notifications hypervisor -> guest OS. */ + unsigned long events; + /* + * Hypervisor will only signal event delivery via the "callback + * exception" when this value is non-zero. Hypervisor clears this when + * notiying the guest OS -- this prevents unbounded reentrancy and + * stack overflow (in this way, acts as an interrupt-enable flag). + */ + unsigned long events_enable; + + /* + * Address for callbacks hypervisor -> guest OS. + * Stack frame looks like that of an interrupt. + * Code segment is the default flat selector. + * This handler will only be called when events_enable is non-zero. + */ + unsigned long event_address; + + /* + * Hypervisor uses this callback when it takes a fault on behalf of + * an application. This can happen when returning from interrupts for + * example: various faults can occur when reloading the segment + * registers, and executing 'iret'. + * This callback is provided with an extended stack frame, augmented + * with saved values for segment registers %ds and %es: + * %ds, %es, %eip, %cs, %eflags [, %oldesp, %oldss] + * Code segment is the default flat selector. + * FAULTS WHEN CALLING THIS HANDLER WILL TERMINATE THE DOMAIN!!! + */ + unsigned long failsafe_address; + + /* + * Time: + * The following abstractions are exposed: System Time, Wall Clock + * Time, Domain Virtual Time. Domains can access Cycle counter time + * directly. + * XXX RN: Need something to pass NTP scaling to GuestOS. + */ + + u64 cpu_freq; /* to calculate ticks -> real time */ + + /* System Time */ + long long system_time; /* in ns */ + unsigned long st_timestamp; /* cyclecounter at last update */ + + /* Wall Clock Time */ + u32 wc_version; /* a version number for info below */ + long tv_sec; /* essentially a struct timeval */ + long tv_usec; + long long wc_timestamp; /* system time at last update */ + + /* Domain Virtual Time */ + unsigned long long domain_time; + + /* + * Timeout values: + * Allow a domain to specify a timeout value in system time and + * domain virtual time. + */ + unsigned long long wall_timeout; + unsigned long long domain_timeout; + +} shared_info_t; + +/* + * NB. We expect that this struct is smaller than a page. + */ +typedef struct start_info_st { + unsigned long nr_pages; /* total pages allocated to this domain */ + shared_info_t *shared_info; /* VIRTUAL address of shared info struct */ + unsigned long pt_base; /* VIRTUAL address of page directory */ + unsigned long mod_start; /* VIRTUAL address of pre-loaded module */ + unsigned long mod_len; /* size (bytes) of pre-loaded module */ + net_ring_t *net_rings; /* network rings (VIRTUAL ADDRESS) */ + int num_net_rings; + unsigned long blk_ring; /* block io ring (MACHINE ADDRESS) */ + unsigned char cmd_line[1]; /* variable-length */ +} start_info_t; + +/* For use in guest OSes. */ +extern shared_info_t *HYPERVISOR_shared_info; + +#endif /* __HYPERVISOR_IF_H__ */ |