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https://github.com/xen-project/xen.git
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Andrew Cooper
5b42c82f55
Mixed throughout libxc are uint32_t, int, and domid_t for domid parameters. With a signed type, and an explicitly 16-bit type, it is exceedingly difficult to construct an INVALID_DOMID constant which works with all of them. (The main problem being that domid_t gets unconditionally zero extended when promoted to int for arithmatic.) Libxl uses uint32_t consistently everywhere, so alter libxc to match. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Release-acked-by: Julien Grall <julien.grall@linaro.org> [ wei: fix compilation error in libxl ] Signed-off-by: Wei Liu <wei.liu2@citrix.com>
261 lines
7.2 KiB
C
261 lines
7.2 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, 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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#include <xen/grant_table.h>
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int xc_memshr_control(xc_interface *xch,
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uint32_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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uint32_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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uint32_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, uint32_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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uint32_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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uint32_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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uint32_t source_domain,
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unsigned long source_gfn,
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uint64_t source_handle,
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uint32_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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uint32_t source_domain,
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grant_ref_t source_gref,
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uint64_t source_handle,
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uint32_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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uint32_t source_domain,
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unsigned long source_gfn,
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uint64_t source_handle,
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uint32_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_range_share(xc_interface *xch,
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uint32_t source_domain,
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uint32_t client_domain,
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uint64_t first_gfn,
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uint64_t last_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_range_share;
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mso.u.range.client_domain = client_domain;
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mso.u.range.first_gfn = first_gfn;
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mso.u.range.last_gfn = last_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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uint32_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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uint32_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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uint32_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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