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https://github.com/xen-project/xen.git
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Tamas K Lengyel
4fa41d0504
Thus far mem_access and mem_sharing memops had been able to signal to Xen to start pulling responses off the corresponding rings. In this patch we retire these memops and add them to the option to the vm_event_op domctl. The vm_event_op domctl suboptions are the same for each ring thus we consolidate them into XEN_VM_EVENT_ENABLE/DISABLE/RESUME. As part of this patch in libxc we also rename the mem_access_enable/disable functions to monitor_enable/disable and move them into xc_monitor.c. Signed-off-by: Tamas K Lengyel <tamas.lengyel@zentific.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Tim Deegan <tim@xen.org>
243 lines
6.7 KiB
C
243 lines
6.7 KiB
C
/******************************************************************************
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*
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* xc_memshr.c
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*
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* Interface to low-level memory sharing functionality.
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*
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* Copyright (c) 2009 Citrix Systems, Inc. (Grzegorz Milos)
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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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#include <xen/memory.h>
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#include <xen/grant_table.h>
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int xc_memshr_control(xc_interface *xch,
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domid_t domid,
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int enable)
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{
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DECLARE_DOMCTL;
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struct xen_domctl_mem_sharing_op *op;
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domctl.cmd = XEN_DOMCTL_mem_sharing_op;
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domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
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domctl.domain = domid;
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op = &(domctl.u.mem_sharing_op);
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op->op = XEN_DOMCTL_MEM_SHARING_CONTROL;
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op->u.enable = enable;
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return do_domctl(xch, &domctl);
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}
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int xc_memshr_ring_enable(xc_interface *xch,
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domid_t domid,
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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, domid,
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XEN_VM_EVENT_ENABLE,
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XEN_DOMCTL_VM_EVENT_OP_SHARING,
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port);
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}
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int xc_memshr_ring_disable(xc_interface *xch,
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domid_t domid)
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{
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return xc_vm_event_control(xch, domid,
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XEN_VM_EVENT_DISABLE,
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XEN_DOMCTL_VM_EVENT_OP_SHARING,
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NULL);
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}
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static int xc_memshr_memop(xc_interface *xch, domid_t domid,
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xen_mem_sharing_op_t *mso)
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{
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mso->domain = domid;
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return do_memory_op(xch, XENMEM_sharing_op, mso, sizeof(*mso));
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}
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int xc_memshr_nominate_gfn(xc_interface *xch,
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domid_t domid,
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unsigned long gfn,
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uint64_t *handle)
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{
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int rc;
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_nominate_gfn;
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mso.u.nominate.u.gfn = gfn;
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rc = xc_memshr_memop(xch, domid, &mso);
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if (!rc) *handle = mso.u.nominate.handle;
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return rc;
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}
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int xc_memshr_nominate_gref(xc_interface *xch,
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domid_t domid,
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grant_ref_t gref,
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uint64_t *handle)
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{
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int rc;
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_nominate_gref;
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mso.u.nominate.u.grant_ref = gref;
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rc = xc_memshr_memop(xch, domid, &mso);
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if (!rc) *handle = mso.u.nominate.handle;
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return rc;
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}
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int xc_memshr_share_gfns(xc_interface *xch,
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domid_t source_domain,
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unsigned long source_gfn,
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uint64_t source_handle,
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domid_t client_domain,
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unsigned long client_gfn,
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uint64_t client_handle)
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{
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_share;
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mso.u.share.source_handle = source_handle;
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mso.u.share.source_gfn = source_gfn;
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mso.u.share.client_domain = client_domain;
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mso.u.share.client_gfn = client_gfn;
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mso.u.share.client_handle = client_handle;
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return xc_memshr_memop(xch, source_domain, &mso);
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}
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int xc_memshr_share_grefs(xc_interface *xch,
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domid_t source_domain,
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grant_ref_t source_gref,
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uint64_t source_handle,
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domid_t client_domain,
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grant_ref_t client_gref,
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uint64_t client_handle)
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{
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_share;
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mso.u.share.source_handle = source_handle;
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XENMEM_SHARING_OP_FIELD_MAKE_GREF(mso.u.share.source_gfn, source_gref);
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mso.u.share.client_domain = client_domain;
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XENMEM_SHARING_OP_FIELD_MAKE_GREF(mso.u.share.client_gfn, client_gref);
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mso.u.share.client_handle = client_handle;
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return xc_memshr_memop(xch, source_domain, &mso);
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}
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int xc_memshr_add_to_physmap(xc_interface *xch,
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domid_t source_domain,
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unsigned long source_gfn,
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uint64_t source_handle,
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domid_t client_domain,
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unsigned long client_gfn)
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{
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_add_physmap;
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mso.u.share.source_handle = source_handle;
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mso.u.share.source_gfn = source_gfn;
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mso.u.share.client_domain = client_domain;
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mso.u.share.client_gfn = client_gfn;
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return xc_memshr_memop(xch, source_domain, &mso);
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}
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int xc_memshr_domain_resume(xc_interface *xch,
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domid_t domid)
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{
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return xc_vm_event_control(xch, domid,
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XEN_VM_EVENT_RESUME,
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XEN_DOMCTL_VM_EVENT_OP_SHARING,
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NULL);
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}
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int xc_memshr_debug_gfn(xc_interface *xch,
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domid_t domid,
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unsigned long gfn)
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{
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_debug_gfn;
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mso.u.debug.u.gfn = gfn;
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return xc_memshr_memop(xch, domid, &mso);
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}
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int xc_memshr_debug_gref(xc_interface *xch,
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domid_t domid,
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grant_ref_t gref)
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{
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_debug_gref;
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mso.u.debug.u.gref = gref;
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return xc_memshr_memop(xch, domid, &mso);
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}
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int xc_memshr_audit(xc_interface *xch)
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{
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xen_mem_sharing_op_t mso;
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memset(&mso, 0, sizeof(mso));
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mso.op = XENMEM_sharing_op_audit;
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return do_memory_op(xch, XENMEM_sharing_op, &mso, sizeof(mso));
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}
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long xc_sharing_freed_pages(xc_interface *xch)
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{
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return do_memory_op(xch, XENMEM_get_sharing_freed_pages, NULL, 0);
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}
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long xc_sharing_used_frames(xc_interface *xch)
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{
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return do_memory_op(xch, XENMEM_get_sharing_shared_pages, NULL, 0);
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}
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