3a6d1fcf9c
Log:
- merge in latest xenbus from dfr's xenhvm
- fix race condition in xs_read_reply by converting tsleep to mtx_sleep
Log:
unmask evtchn in bind_{virq, ipi}_to_irq
Log:
- remove code for handling case of not being able to sleep
- eliminate tsleep - make sleeps atomic
146 lines
3.2 KiB
C
146 lines
3.2 KiB
C
/******************************************************************************
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* hypervisor.h
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*
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* Linux-specific hypervisor handling.
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*
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* Copyright (c) 2002, K A Fraser
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*
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* $FreeBSD$
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*/
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#ifndef __HYPERVISOR_H__
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#define __HYPERVISOR_H__
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#define is_running_on_xen() 1
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#ifdef PAE
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#ifndef CONFIG_X86_PAE
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#define CONFIG_X86_PAE
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#endif
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#endif
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#include <sys/cdefs.h>
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#include <sys/systm.h>
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#include <xen/interface/xen.h>
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#include <xen/interface/platform.h>
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#include <xen/interface/event_channel.h>
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#include <xen/interface/physdev.h>
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#include <xen/interface/sched.h>
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#include <xen/interface/callback.h>
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#include <machine/xen/hypercall.h>
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#if defined(__amd64__)
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#define MULTI_UVMFLAGS_INDEX 2
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#define MULTI_UVMDOMID_INDEX 3
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#else
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#define MULTI_UVMFLAGS_INDEX 3
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#define MULTI_UVMDOMID_INDEX 4
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#endif
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#ifdef CONFIG_XEN_PRIVILEGED_GUEST
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#define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
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#else
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#define is_initial_xendomain() 0
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#endif
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extern start_info_t *xen_start_info;
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extern uint64_t get_system_time(int ticks);
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static inline int
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HYPERVISOR_console_write(char *str, int count)
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{
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return HYPERVISOR_console_io(CONSOLEIO_write, count, str);
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}
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static inline void HYPERVISOR_crash(void) __dead2;
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static inline int
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HYPERVISOR_yield(void)
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{
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int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
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#if CONFIG_XEN_COMPAT <= 0x030002
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if (rc == -ENOXENSYS)
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rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
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#endif
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return (rc);
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}
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static inline int
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HYPERVISOR_block(
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void)
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{
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int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
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#if CONFIG_XEN_COMPAT <= 0x030002
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if (rc == -ENOXENSYS)
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rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
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#endif
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return (rc);
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}
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static inline void
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HYPERVISOR_shutdown(unsigned int reason)
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{
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struct sched_shutdown sched_shutdown = {
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.reason = reason
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};
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HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
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#if CONFIG_XEN_COMPAT <= 0x030002
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HYPERVISOR_sched_op_compat(SCHEDOP_shutdown, reason);
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#endif
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}
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static inline void
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HYPERVISOR_crash(void)
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{
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HYPERVISOR_shutdown(SHUTDOWN_crash);
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/* NEVER REACHED */
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for (;;) ; /* eliminate noreturn error */
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}
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/* Transfer control to hypervisor until an event is detected on one */
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/* of the specified ports or the specified number of ticks elapse */
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static inline int
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HYPERVISOR_poll(
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evtchn_port_t *ports, unsigned int nr_ports, int ticks)
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{
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int rc;
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struct sched_poll sched_poll = {
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.nr_ports = nr_ports,
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.timeout = get_system_time(ticks)
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};
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set_xen_guest_handle(sched_poll.ports, ports);
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rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
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#if CONFIG_XEN_COMPAT <= 0x030002
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if (rc == -ENOXENSYS)
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rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
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#endif
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return (rc);
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}
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static inline void
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MULTI_update_va_mapping(
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multicall_entry_t *mcl, unsigned long va,
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uint64_t new_val, unsigned long flags)
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{
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mcl->op = __HYPERVISOR_update_va_mapping;
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mcl->args[0] = va;
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#if defined(__amd64__)
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mcl->args[1] = new_val.pte;
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#elif defined(PAE)
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mcl->args[1] = (uint32_t)(new_val & 0xffffffff) ;
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mcl->args[2] = (uint32_t)(new_val >> 32);
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#else
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mcl->args[1] = new_val;
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mcl->args[2] = 0;
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#endif
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mcl->args[MULTI_UVMFLAGS_INDEX] = flags;
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}
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#endif /* __HYPERVISOR_H__ */
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