mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-21 18:27:22 +00:00
399386f190
The current xc_printf() function uses an hypercall in order to send character buffers to the hypervisor for it to print on the hypervisor console (if the hypervisor is configured to print such messages). This requires the hypercall page to be initialized, which is extra work and can go wrong. On x86 instead of using the console IO hypercall use the debug console IO port, also called "port E9 hack". This allows sending characters to Xen using an outb instruction, without any initialization required. Keep the previous hypervisor based implementation by using the weak attribute, which allows each architecture to provide an alternate (arch-specific) implementation. Sponsored by: Cloud Software Group Reviewed by: markj Differential revision: https://reviews.freebsd.org/D43929
174 lines
4.1 KiB
C
174 lines
4.1 KiB
C
/******************************************************************************
|
|
* xen/xen-os.h
|
|
*
|
|
* Random collection of macros and definition
|
|
*
|
|
* Copyright (c) 2003, 2004 Keir Fraser (on behalf of the Xen team)
|
|
* All rights reserved.
|
|
*
|
|
* 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_XEN_OS_H_
|
|
#define _XEN_XEN_OS_H_
|
|
|
|
#define __XEN_INTERFACE_VERSION__ 0x00040d00
|
|
|
|
#define GRANT_REF_INVALID 0xffffffff
|
|
|
|
#ifdef LOCORE
|
|
#define __ASSEMBLY__
|
|
#endif
|
|
|
|
#include <contrib/xen/xen.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <xen/hvm.h>
|
|
#include <contrib/xen/event_channel.h>
|
|
|
|
/*
|
|
* Setup function which needs to be called on each processor by architecture
|
|
*/
|
|
extern void xen_setup_vcpu_info(void);
|
|
|
|
static inline vm_paddr_t
|
|
xen_get_xenstore_mfn(void)
|
|
{
|
|
|
|
return (hvm_get_parameter(HVM_PARAM_STORE_PFN));
|
|
}
|
|
|
|
static inline evtchn_port_t
|
|
xen_get_xenstore_evtchn(void)
|
|
{
|
|
|
|
return (hvm_get_parameter(HVM_PARAM_STORE_EVTCHN));
|
|
}
|
|
|
|
static inline vm_paddr_t
|
|
xen_get_console_mfn(void)
|
|
{
|
|
|
|
return (hvm_get_parameter(HVM_PARAM_CONSOLE_PFN));
|
|
}
|
|
|
|
static inline evtchn_port_t
|
|
xen_get_console_evtchn(void)
|
|
{
|
|
|
|
return (hvm_get_parameter(HVM_PARAM_CONSOLE_EVTCHN));
|
|
}
|
|
|
|
extern shared_info_t *HYPERVISOR_shared_info;
|
|
|
|
extern bool xen_suspend_cancelled;
|
|
|
|
static inline bool
|
|
xen_domain(void)
|
|
{
|
|
return (vm_guest == VM_GUEST_XEN);
|
|
}
|
|
|
|
static inline bool
|
|
xen_pv_domain(void)
|
|
{
|
|
return (false);
|
|
}
|
|
|
|
static inline bool
|
|
xen_hvm_domain(void)
|
|
{
|
|
return (vm_guest == VM_GUEST_XEN);
|
|
}
|
|
|
|
static inline bool
|
|
xen_initial_domain(void)
|
|
{
|
|
|
|
return (xen_domain() && (hvm_start_flags & SIF_INITDOMAIN) != 0);
|
|
}
|
|
#endif
|
|
|
|
#include <machine/xen/xen-os.h>
|
|
|
|
/* Everything below this point is not included by assembler (.S) files. */
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* Based on ofed/include/linux/bitops.h
|
|
*
|
|
* Those helpers are prefixed by xen_ because xen-os.h is widely included
|
|
* and we don't want the other drivers using them.
|
|
*
|
|
*/
|
|
#define NBPL (NBBY * sizeof(long))
|
|
|
|
static inline bool
|
|
xen_test_bit(int bit, volatile xen_ulong_t *addr)
|
|
{
|
|
unsigned long mask = 1UL << (bit % NBPL);
|
|
|
|
return !!(atomic_load_acq_xen_ulong(&addr[bit / NBPL]) & mask);
|
|
}
|
|
|
|
static inline void
|
|
xen_set_bit(int bit, volatile xen_ulong_t *addr)
|
|
{
|
|
atomic_set_xen_ulong(&addr[bit / NBPL], 1UL << (bit % NBPL));
|
|
}
|
|
|
|
static inline void
|
|
xen_clear_bit(int bit, volatile xen_ulong_t *addr)
|
|
{
|
|
atomic_clear_xen_ulong(&addr[bit / NBPL], 1UL << (bit % NBPL));
|
|
}
|
|
|
|
#undef NBPL
|
|
|
|
/*
|
|
* Functions to allocate/free unused memory in order
|
|
* to map memory from other domains.
|
|
*/
|
|
struct resource *xenmem_alloc(device_t dev, int *res_id, size_t size);
|
|
int xenmem_free(device_t dev, int res_id, struct resource *res);
|
|
|
|
/* Debug/emergency function, prints directly to hypervisor console */
|
|
void xc_printf(const char *, ...) __printflike(1, 2);
|
|
|
|
/*
|
|
* Emergency print function, can be defined per-arch, otherwise defaults to
|
|
* HYPERVISOR_console_write. Should not be called directly, use xc_printf
|
|
* instead.
|
|
*/
|
|
void xen_emergency_print(const char *str, size_t size);
|
|
|
|
#ifndef xen_mb
|
|
#define xen_mb() mb()
|
|
#endif
|
|
#ifndef xen_rmb
|
|
#define xen_rmb() rmb()
|
|
#endif
|
|
#ifndef xen_wmb
|
|
#define xen_wmb() wmb()
|
|
#endif
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* _XEN_XEN_OS_H_ */
|