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https://github.com/xen-project/xen.git
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Tim Deegan
770d1e858d
This solves a long-standing issue in which the pages backing these rings were pages belonging to dom0 user-space processes. Thus, if the process would die unexpectedly, Xen would keep posting events to a page now belonging to some other process. We update all API-consumers in tree (xenpaging and xen-access). This is an API/ABI change, so please speak up if it breaks your accumptions. The patch touches tools, hypervisor x86/hvm bits, and hypervisor x86/mm bits. Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org> Acked-by: Tim Deegan <tim@xen.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Committed-by: Tim Deegan <tim@xen.org>
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/******************************************************************************
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*
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* tools/libxc/xc_mem_access.c
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*
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* Interface to low-level memory access mode functionality
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*
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* Copyright (c) 2011 Virtuata, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xc_private.h"
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int xc_mem_access_enable(xc_interface *xch, domid_t domain_id,
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uint32_t *port)
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{
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if ( !port )
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{
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errno = EINVAL;
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return -1;
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}
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE,
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XEN_DOMCTL_MEM_EVENT_OP_ACCESS,
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port);
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}
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int xc_mem_access_disable(xc_interface *xch, domid_t domain_id)
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{
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_ACCESS_DISABLE,
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XEN_DOMCTL_MEM_EVENT_OP_ACCESS,
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NULL);
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}
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int xc_mem_access_resume(xc_interface *xch, domid_t domain_id, unsigned long gfn)
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{
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return xc_mem_event_memop(xch, domain_id,
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XENMEM_access_op_resume,
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XENMEM_access_op,
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gfn, NULL);
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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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* indent-tabs-mode: nil
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* End:
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*/
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