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https://github.com/xen-project/xen.git
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Keir Fraser
c93bd0e6ea
This implicitly required coverting the tmem_op structure from anonymous to standard struct/union sub-fields, and extending the get-fields.sh helper script to deal with typedef-ed guest handles used as types of translated compound type fields. Signed-off-by: Jan Beulich <jbeulich@novell.com>
84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/******************************************************************************
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* xc_tmem.c
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*
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* Copyright (C) 2008 Oracle Corp.
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*/
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#include "xc_private.h"
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#include <xen/tmem.h>
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static int do_tmem_op(int xc, tmem_op_t *op)
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{
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int ret;
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DECLARE_HYPERCALL;
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hypercall.op = __HYPERVISOR_tmem_op;
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hypercall.arg[0] = (unsigned long)op;
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if (lock_pages(op, sizeof(*op)) != 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, &hypercall)) < 0)
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{
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if ( errno == EACCES )
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DPRINTF("tmem 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(op, sizeof(*op));
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return ret;
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}
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int xc_tmem_control(int xc,
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int32_t pool_id,
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uint32_t subop,
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uint32_t cli_id,
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uint32_t arg1,
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uint32_t arg2,
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void *buf)
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{
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tmem_op_t op;
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int rc;
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op.cmd = TMEM_CONTROL;
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op.pool_id = pool_id;
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op.u.ctrl.subop = subop;
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op.u.ctrl.cli_id = cli_id;
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op.u.ctrl.arg1 = arg1;
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op.u.ctrl.arg2 = arg2;
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op.u.ctrl.buf.p = buf;
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if (subop == TMEMC_LIST) {
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if ((arg1 != 0) && (lock_pages(buf, arg1) != 0))
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{
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PERROR("Could not lock memory for Xen hypercall");
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return -ENOMEM;
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}
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}
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#ifdef VALGRIND
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if (arg1 != 0)
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memset(buf, 0, arg1);
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#endif
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rc = do_tmem_op(xc, &op);
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if (subop == TMEMC_LIST) {
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if (arg1 != 0)
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unlock_pages(buf, arg1);
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}
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return rc;
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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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