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Tamas K Lengyel
108d145df8
Make the do_memory_op function accessible to tools linking with libxc. Similar functions are already available for both domctl and sysctl. As part of this patch we also change the input 'cmd' to be unsigned int to accurately reflect what the hypervisor expects. Signed-off-by: Tamas K Lengyel <tamas.lengyel@intel.com> Reviewed-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com>
111 lines
3.1 KiB
C
111 lines
3.1 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, see <http://www.gnu.org/licenses/>.
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*/
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#include "xc_private.h"
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#include <xen/memory.h>
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int xc_set_mem_access(xc_interface *xch,
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uint32_t domain_id,
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xenmem_access_t access,
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uint64_t first_pfn,
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uint32_t nr)
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{
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xen_mem_access_op_t mao =
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{
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.op = XENMEM_access_op_set_access,
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.domid = domain_id,
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.access = access,
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.pfn = first_pfn,
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.nr = nr
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};
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return xc_memory_op(xch, XENMEM_access_op, &mao, sizeof(mao));
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}
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int xc_set_mem_access_multi(xc_interface *xch,
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uint32_t domain_id,
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uint8_t *access,
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uint64_t *pages,
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uint32_t nr)
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{
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DECLARE_HYPERCALL_BOUNCE(access, nr, XC_HYPERCALL_BUFFER_BOUNCE_IN);
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DECLARE_HYPERCALL_BOUNCE(pages, nr * sizeof(uint64_t),
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XC_HYPERCALL_BUFFER_BOUNCE_IN);
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int rc;
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xen_mem_access_op_t mao =
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{
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.op = XENMEM_access_op_set_access_multi,
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.domid = domain_id,
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.access = XENMEM_access_default + 1, /* Invalid value */
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.pfn = ~0UL, /* Invalid GFN */
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.nr = nr,
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};
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if ( xc_hypercall_bounce_pre(xch, pages) ||
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xc_hypercall_bounce_pre(xch, access) )
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{
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PERROR("Could not bounce memory for XENMEM_access_op_set_access_multi");
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return -1;
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}
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set_xen_guest_handle(mao.pfn_list, pages);
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set_xen_guest_handle(mao.access_list, access);
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rc = xc_memory_op(xch, XENMEM_access_op, &mao, sizeof(mao));
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xc_hypercall_bounce_post(xch, access);
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xc_hypercall_bounce_post(xch, pages);
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return rc;
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}
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int xc_get_mem_access(xc_interface *xch,
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uint32_t domain_id,
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uint64_t pfn,
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xenmem_access_t *access)
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{
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int rc;
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xen_mem_access_op_t mao =
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{
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.op = XENMEM_access_op_get_access,
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.domid = domain_id,
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.pfn = pfn
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};
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rc = xc_memory_op(xch, XENMEM_access_op, &mao, sizeof(mao));
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if ( rc == 0 )
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*access = mao.access;
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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-file-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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