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kaf24@firebug.cl.cam.ac.uk
22c42d4bc0
trace-buffer size into a fatal error. Signed-off-by: Keir Fraser <keir@xensource.com>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/******************************************************************************
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* xc_tbuf.c
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*
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* API for manipulating and accessing trace buffer parameters
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*
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* Copyright (c) 2005, Rob Gardner
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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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static int tbuf_enable(int xc_handle, int enable)
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{
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DECLARE_DOM0_OP;
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op.cmd = DOM0_TBUFCONTROL;
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op.interface_version = DOM0_INTERFACE_VERSION;
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if (enable)
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op.u.tbufcontrol.op = DOM0_TBUF_ENABLE;
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else
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op.u.tbufcontrol.op = DOM0_TBUF_DISABLE;
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return xc_dom0_op(xc_handle, &op);
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}
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int xc_tbuf_set_size(int xc_handle, unsigned long size)
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{
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DECLARE_DOM0_OP;
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op.cmd = DOM0_TBUFCONTROL;
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op.interface_version = DOM0_INTERFACE_VERSION;
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op.u.tbufcontrol.op = DOM0_TBUF_SET_SIZE;
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op.u.tbufcontrol.size = size;
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return xc_dom0_op(xc_handle, &op);
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}
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int xc_tbuf_get_size(int xc_handle, unsigned long *size)
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{
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int rc;
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DECLARE_DOM0_OP;
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op.cmd = DOM0_TBUFCONTROL;
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op.interface_version = DOM0_INTERFACE_VERSION;
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op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
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rc = xc_dom0_op(xc_handle, &op);
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if (rc == 0)
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*size = op.u.tbufcontrol.size;
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return rc;
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}
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int xc_tbuf_enable(int xc_handle, size_t cnt, unsigned long *mfn,
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unsigned long *size)
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{
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DECLARE_DOM0_OP;
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int rc;
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/*
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* Ignore errors (at least for now) as we get an error if size is already
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* set (since trace buffers cannot be reallocated). If we really have no
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* buffers at all then tbuf_enable() will fail, so this is safe.
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*/
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(void)xc_tbuf_set_size(xc_handle, cnt);
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if ( tbuf_enable(xc_handle, 1) != 0 )
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return -1;
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op.cmd = DOM0_TBUFCONTROL;
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op.interface_version = DOM0_INTERFACE_VERSION;
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op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
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rc = xc_dom0_op(xc_handle, &op);
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if ( rc == 0 )
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{
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*size = op.u.tbufcontrol.size;
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*mfn = op.u.tbufcontrol.buffer_mfn;
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}
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return 0;
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}
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int xc_tbuf_disable(int xc_handle)
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{
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return tbuf_enable(xc_handle, 0);
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}
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int xc_tbuf_set_cpu_mask(int xc_handle, uint32_t mask)
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{
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DECLARE_DOM0_OP;
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op.cmd = DOM0_TBUFCONTROL;
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op.interface_version = DOM0_INTERFACE_VERSION;
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op.u.tbufcontrol.op = DOM0_TBUF_SET_CPU_MASK;
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op.u.tbufcontrol.cpu_mask = mask;
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return do_dom0_op(xc_handle, &op);
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}
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int xc_tbuf_set_evt_mask(int xc_handle, uint32_t mask)
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{
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DECLARE_DOM0_OP;
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op.cmd = DOM0_TBUFCONTROL;
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op.interface_version = DOM0_INTERFACE_VERSION;
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op.u.tbufcontrol.op = DOM0_TBUF_SET_EVT_MASK;
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op.u.tbufcontrol.evt_mask = mask;
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return do_dom0_op(xc_handle, &op);
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}
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