mirror of
https://git.FreeBSD.org/src.git
synced 2024-11-28 08:02:54 +00:00
baa006f342
The current approach is to create foreign mappings in any unpopulated address on the memory map. This however can cause issues, as late-loaded drivers could then found their MMIO region has been stolen to be used as foreign mapping scratch space (due to the Xen drivers having started first). Add a local resource manager to the xenpv bus driver, architectures can add suitable resources to that resource manager at boot in order to be used in preference of the generic MMIO resource allocator. No functional change, as the introduced scratch mapping range is not yet populated. Sponsored by: Cloud Software Group MFC after: 1 week Reviewed by: Elliott Mitchell <ehem+freebsd@m5p.com> Differential revision: https://reviews.freebsd.org/D46122
179 lines
4.3 KiB
C
179 lines
4.3 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 <sys/rman.h>
|
|
|
|
#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);
|
|
|
|
/* Arch-specific helper to init scratch mapping space. */
|
|
int xen_arch_init_physmem(device_t dev, struct rman *mem);
|
|
|
|
#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_ */
|