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b97e2fe7b9e1f4706693552697239ac2b71efee4
xen/tools/libs/ctrl/xc_memshr.c
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Tamas K Lengyel 108d145df8 tools/libs/ctrl: rename and export do_memory_op as xc_memory_op 
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>
2022-06-01 09:18:30 +02:00

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8.1 KiB
C
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/******************************************************************************
*
* xc_memshr.c
*
* Interface to low-level memory sharing functionality.
*
* Copyright (c) 2009 Citrix Systems, Inc. (Grzegorz Milos)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
*/
#include "xc_private.h"
#include <xen/memory.h>
#include <xen/grant_table.h>
int xc_memshr_control(xc_interface *xch,
uint32_t domid,
int enable)
{
DECLARE_DOMCTL;
struct xen_domctl_mem_sharing_op *op;
domctl.cmd = XEN_DOMCTL_mem_sharing_op;
domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
domctl.domain = domid;
op = &(domctl.u.mem_sharing_op);
op->op = XEN_DOMCTL_MEM_SHARING_CONTROL;
op->u.enable = enable;
return do_domctl(xch, &domctl);
}
int xc_memshr_ring_enable(xc_interface *xch,
uint32_t domid,
uint32_t *port)
{
if ( !port )
{
errno = EINVAL;
return -1;
}
return xc_vm_event_control(xch, domid,
XEN_VM_EVENT_ENABLE,
XEN_DOMCTL_VM_EVENT_OP_SHARING,
port);
}
int xc_memshr_ring_disable(xc_interface *xch,
uint32_t domid)
{
return xc_vm_event_control(xch, domid,
XEN_VM_EVENT_DISABLE,
XEN_DOMCTL_VM_EVENT_OP_SHARING,
NULL);
}
static int xc_memshr_memop(xc_interface *xch, uint32_t domid,
xen_mem_sharing_op_t *mso)
{
mso->domain = domid;
return xc_memory_op(xch, XENMEM_sharing_op, mso, sizeof(*mso));
}
int xc_memshr_nominate_gfn(xc_interface *xch,
uint32_t domid,
unsigned long gfn,
uint64_t *handle)
{
int rc;
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_nominate_gfn;
mso.u.nominate.u.gfn = gfn;
rc = xc_memshr_memop(xch, domid, &mso);
if ( !rc )
*handle = mso.u.nominate.handle;
return rc;
}
int xc_memshr_nominate_gref(xc_interface *xch,
uint32_t domid,
grant_ref_t gref,
uint64_t *handle)
{
int rc;
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_nominate_gref;
mso.u.nominate.u.grant_ref = gref;
rc = xc_memshr_memop(xch, domid, &mso);
if ( !rc )
*handle = mso.u.nominate.handle;
return rc;
}
int xc_memshr_share_gfns(xc_interface *xch,
uint32_t source_domain,
unsigned long source_gfn,
uint64_t source_handle,
uint32_t client_domain,
unsigned long client_gfn,
uint64_t client_handle)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_share;
mso.u.share.source_handle = source_handle;
mso.u.share.source_gfn = source_gfn;
mso.u.share.client_domain = client_domain;
mso.u.share.client_gfn = client_gfn;
mso.u.share.client_handle = client_handle;
return xc_memshr_memop(xch, source_domain, &mso);
}
int xc_memshr_share_grefs(xc_interface *xch,
uint32_t source_domain,
grant_ref_t source_gref,
uint64_t source_handle,
uint32_t client_domain,
grant_ref_t client_gref,
uint64_t client_handle)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_share;
mso.u.share.source_handle = source_handle;
XENMEM_SHARING_OP_FIELD_MAKE_GREF(mso.u.share.source_gfn, source_gref);
mso.u.share.client_domain = client_domain;
XENMEM_SHARING_OP_FIELD_MAKE_GREF(mso.u.share.client_gfn, client_gref);
mso.u.share.client_handle = client_handle;
return xc_memshr_memop(xch, source_domain, &mso);
}
int xc_memshr_add_to_physmap(xc_interface *xch,
uint32_t source_domain,
unsigned long source_gfn,
uint64_t source_handle,
uint32_t client_domain,
unsigned long client_gfn)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_add_physmap;
mso.u.share.source_handle = source_handle;
mso.u.share.source_gfn = source_gfn;
mso.u.share.client_domain = client_domain;
mso.u.share.client_gfn = client_gfn;
return xc_memshr_memop(xch, source_domain, &mso);
}
int xc_memshr_range_share(xc_interface *xch,
uint32_t source_domain,
uint32_t client_domain,
uint64_t first_gfn,
uint64_t last_gfn)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_range_share;
mso.u.range.client_domain = client_domain;
mso.u.range.first_gfn = first_gfn;
mso.u.range.last_gfn = last_gfn;
return xc_memshr_memop(xch, source_domain, &mso);
}
int xc_memshr_domain_resume(xc_interface *xch,
uint32_t domid)
{
return xc_vm_event_control(xch, domid,
XEN_VM_EVENT_RESUME,
XEN_DOMCTL_VM_EVENT_OP_SHARING,
NULL);
}
int xc_memshr_debug_gfn(xc_interface *xch,
uint32_t domid,
unsigned long gfn)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_debug_gfn;
mso.u.debug.u.gfn = gfn;
return xc_memshr_memop(xch, domid, &mso);
}
int xc_memshr_debug_gref(xc_interface *xch,
uint32_t domid,
grant_ref_t gref)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_debug_gref;
mso.u.debug.u.gref = gref;
return xc_memshr_memop(xch, domid, &mso);
}
int xc_memshr_fork(xc_interface *xch, uint32_t pdomid, uint32_t domid,
bool allow_with_iommu, bool block_interrupts)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_fork;
mso.u.fork.parent_domain = pdomid;
if ( allow_with_iommu )
mso.u.fork.flags |= XENMEM_FORK_WITH_IOMMU_ALLOWED;
if ( block_interrupts )
mso.u.fork.flags |= XENMEM_FORK_BLOCK_INTERRUPTS;
return xc_memshr_memop(xch, domid, &mso);
}
int xc_memshr_fork_reset(xc_interface *xch, uint32_t domid, bool reset_state,
bool reset_memory)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_fork_reset;
if ( reset_state )
mso.u.fork.flags |= XENMEM_FORK_RESET_STATE;
if ( reset_memory )
mso.u.fork.flags |= XENMEM_FORK_RESET_MEMORY;
return xc_memshr_memop(xch, domid, &mso);
}
int xc_memshr_audit(xc_interface *xch)
{
xen_mem_sharing_op_t mso;
memset(&mso, 0, sizeof(mso));
mso.op = XENMEM_sharing_op_audit;
return xc_memory_op(xch, XENMEM_sharing_op, &mso, sizeof(mso));
}
long xc_sharing_freed_pages(xc_interface *xch)
{
return xc_memory_op(xch, XENMEM_get_sharing_freed_pages, NULL, 0);
}
long xc_sharing_used_frames(xc_interface *xch)
{
return xc_memory_op(xch, XENMEM_get_sharing_shared_pages, NULL, 0);
}
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