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kfraser@localhost.localdomain
fab51b46ae
Implement a simpler interface for the hypercalls to ACM. I put the parameters to all hypercalls into a union. On top of this I have implemented a shim layer for enabling ACM hypercalls on PPC. Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
121 lines
3.4 KiB
C
121 lines
3.4 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, unsigned long arg_size)
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{
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int ret;
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DECLARE_HYPERCALL;
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struct xen_acmctl acmctl;
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switch (cmd) {
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case ACMOP_setpolicy: {
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struct acm_setpolicy *setpolicy = (struct acm_setpolicy *)arg;
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memcpy(&acmctl.u.setpolicy,
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setpolicy,
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sizeof(struct acm_setpolicy));
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}
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break;
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case ACMOP_getpolicy: {
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struct acm_getpolicy *getpolicy = (struct acm_getpolicy *)arg;
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memcpy(&acmctl.u.getpolicy,
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getpolicy,
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sizeof(struct acm_getpolicy));
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}
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break;
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case ACMOP_dumpstats: {
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struct acm_dumpstats *dumpstats = (struct acm_dumpstats *)arg;
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memcpy(&acmctl.u.dumpstats,
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dumpstats,
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sizeof(struct acm_dumpstats));
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}
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break;
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case ACMOP_getssid: {
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struct acm_getssid *getssid = (struct acm_getssid *)arg;
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memcpy(&acmctl.u.getssid,
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getssid,
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sizeof(struct acm_getssid));
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}
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break;
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case ACMOP_getdecision: {
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struct acm_getdecision *getdecision = (struct acm_getdecision *)arg;
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memcpy(&acmctl.u.getdecision,
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getdecision,
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sizeof(struct acm_getdecision));
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}
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break;
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case ACMOP_chgpolicy: {
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struct acm_change_policy *change_policy = (struct acm_change_policy *)arg;
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memcpy(&acmctl.u.change_policy,
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change_policy,
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sizeof(struct acm_change_policy));
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}
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break;
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case ACMOP_relabeldoms: {
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struct acm_relabel_doms *relabel_doms = (struct acm_relabel_doms *)arg;
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memcpy(&acmctl.u.relabel_doms,
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relabel_doms,
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sizeof(struct acm_relabel_doms));
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}
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break;
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}
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acmctl.cmd = cmd;
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acmctl.interface_version = ACM_INTERFACE_VERSION;
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hypercall.op = __HYPERVISOR_acm_op;
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hypercall.arg[0] = (unsigned long)&acmctl;
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if ( lock_pages(&acmctl, sizeof(acmctl)) != 0)
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{
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PERROR("Could not lock memory for Xen hypercall");
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return -EFAULT;
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}
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if ( (ret = do_xen_hypercall(xc_handle, &hypercall)) < 0)
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{
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if ( errno == EACCES )
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DPRINTF("acmctl operation failed -- need to"
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" rebuild the user-space tool set?\n");
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}
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unlock_pages(&acmctl, sizeof(acmctl));
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switch (cmd) {
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case ACMOP_getdecision: {
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struct acm_getdecision *getdecision = (struct acm_getdecision *)arg;
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memcpy(getdecision,
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&acmctl.u.getdecision,
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sizeof(struct acm_getdecision));
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break;
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}
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}
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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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