1b52cd4553
- Add a write_mem counterpart to read_mem to handle writes to MMIO. - Add support for the GDB 'M' packet to write bytes to the guest's memory. For MMIO writes, attempt to batch writes up into words. This is imprecise, but if you write a single 2 or 4-byte aligned word, it should be treated as a single MMIO write operation. - While here, tidy up the parsing of the 'm' command used for reading memory to match 'M'. Reviewed by: markj, Scott Phillips <d.scott.phillips@intel.com> MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D20307
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MEM_H_
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#define _MEM_H_
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#include <sys/linker_set.h>
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struct vmctx;
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typedef int (*mem_func_t)(struct vmctx *ctx, int vcpu, int dir, uint64_t addr,
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int size, uint64_t *val, void *arg1, long arg2);
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struct mem_range {
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const char *name;
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int flags;
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mem_func_t handler;
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void *arg1;
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long arg2;
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uint64_t base;
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uint64_t size;
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};
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#define MEM_F_READ 0x1
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#define MEM_F_WRITE 0x2
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#define MEM_F_RW 0x3
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#define MEM_F_IMMUTABLE 0x4 /* mem_range cannot be unregistered */
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void init_mem(void);
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int emulate_mem(struct vmctx *, int vcpu, uint64_t paddr, struct vie *vie,
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struct vm_guest_paging *paging);
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int read_mem(struct vmctx *ctx, int vcpu, uint64_t gpa, uint64_t *rval,
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int size);
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int register_mem(struct mem_range *memp);
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int register_mem_fallback(struct mem_range *memp);
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int unregister_mem(struct mem_range *memp);
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int write_mem(struct vmctx *ctx, int vcpu, uint64_t gpa, uint64_t wval,
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int size);
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#endif /* _MEM_H_ */
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