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kaf24@firebug.cl.cam.ac.uk
630ad4e0ad
with command-specific request structures. It aligns the ACM hypercalls with the way parameters are passed in the event channel hypercalls. Advantages include backward-compatibility regarding old guests when new calls are added and clarity of the code. Signed-off by: Reiner Sailer <sailer@us.ibm.com>
46 lines
1.0 KiB
C
46 lines
1.0 KiB
C
/******************************************************************************
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* xc_acm.c
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*
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* Copyright (C) 2005, 2006 IBM Corporation, R Sailer
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*
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#include "xc_private.h"
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int xc_acm_op(int xc_handle, int cmd, void *arg, size_t arg_size)
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{
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int ret = -1;
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DECLARE_HYPERCALL;
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hypercall.op = __HYPERVISOR_acm_op;
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hypercall.arg[0] = cmd;
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hypercall.arg[1] = (unsigned long) arg;
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if (mlock(arg, arg_size) != 0) {
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PERROR("xc_acm_op: arg mlock failed");
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goto out;
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}
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ret = do_xen_hypercall(xc_handle, &hypercall);
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safe_munlock(arg, arg_size);
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out:
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return ret;
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}
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/*
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* Local variables:
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* mode: C
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* c-set-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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