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https://github.com/xen-project/xen.git
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Jan Beulich
9f40699c95
While it should have been this way from the beginning, not doing so will become an actual problem with PVH Dom0. The interface change is binary compatible, but requires tools side producers to be re-built. Drop the bogus/unnecessary page alignment restriction on the input buffer at the same time. Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Roger Pau Monné <roger.pau@citrix.com> Acked-by: Wei Liu <wl@xen.org>
131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/******************************************************************************
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*
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* tools/libxc/xc_mem_paging.c
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*
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* Interface to low-level memory paging functionality.
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*
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* Copyright (c) 2009 by Citrix Systems, Inc. (Patrick Colp)
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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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static int xc_mem_paging_memop(xc_interface *xch, uint32_t domain_id,
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unsigned int op, uint64_t gfn, void *buffer)
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{
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xen_mem_paging_op_t mpo;
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DECLARE_HYPERCALL_BOUNCE(buffer, XC_PAGE_SIZE,
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XC_HYPERCALL_BUFFER_BOUNCE_IN);
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int rc;
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memset(&mpo, 0, sizeof(mpo));
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mpo.op = op;
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mpo.domain = domain_id;
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mpo.gfn = gfn;
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if ( buffer )
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{
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if ( xc_hypercall_bounce_pre(xch, buffer) )
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{
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PERROR("Could not bounce memory for XENMEM_paging_op %u", op);
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return -1;
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}
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set_xen_guest_handle(mpo.buffer, buffer);
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}
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rc = do_memory_op(xch, XENMEM_paging_op, &mpo, sizeof(mpo));
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if ( buffer )
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xc_hypercall_bounce_post(xch, buffer);
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return rc;
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}
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int xc_mem_paging_enable(xc_interface *xch, uint32_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_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_ENABLE,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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port);
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}
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int xc_mem_paging_disable(xc_interface *xch, uint32_t domain_id)
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{
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return xc_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_DISABLE,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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NULL);
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}
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int xc_mem_paging_resume(xc_interface *xch, uint32_t domain_id)
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{
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return xc_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_RESUME,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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NULL);
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}
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int xc_mem_paging_nominate(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_nominate,
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gfn, NULL);
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}
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int xc_mem_paging_evict(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_evict,
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gfn, NULL);
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}
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int xc_mem_paging_prep(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_prep,
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gfn, NULL);
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}
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int xc_mem_paging_load(xc_interface *xch, uint32_t domain_id,
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uint64_t gfn, void *buffer)
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{
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errno = EINVAL;
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if ( !buffer )
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return -1;
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return xc_mem_paging_memop(xch, domain_id, XENMEM_paging_op_prep,
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gfn, buffer);
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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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