mirror of
https://github.com/xen-project/xen.git
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Razvan Cojocaru
7559ab7830
Currently there is a subop for setting the memaccess of a page, but not for consulting it. The new HVMOP_altp2m_get_mem_access adds this functionality. Both altp2m get/set mem access functions use the struct xen_hvm_altp2m_mem_access which has now dropped the `set' part and has been renamed from xen_hvm_altp2m_set_mem_access. Signed-off-by: Adrian Pop <apop@bitdefender.com> Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Tamas K Lengyel <tamas@tklengyel.com> Reviewed-by: George Dunlap <george.dunlap@citrix.com>
333 lines
9.8 KiB
C
333 lines
9.8 KiB
C
/******************************************************************************
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*
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* xc_altp2m.c
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*
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* Interface to altp2m related HVMOPs
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*
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* Copyright (c) 2015 Tamas K Lengyel (tamas@tklengyel.com)
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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 <stdbool.h>
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#include <xen/hvm/hvm_op.h>
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int xc_altp2m_get_domain_state(xc_interface *handle, uint32_t dom, bool *state)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_get_domain_state;
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arg->domain = dom;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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if ( !rc )
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*state = arg->u.domain_state.state;
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_set_domain_state(xc_interface *handle, uint32_t dom, bool state)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_set_domain_state;
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arg->domain = dom;
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arg->u.domain_state.state = state;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_set_vcpu_enable_notify(xc_interface *handle, uint32_t domid,
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uint32_t vcpuid, xen_pfn_t gfn)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_vcpu_enable_notify;
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arg->domain = domid;
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arg->u.enable_notify.vcpu_id = vcpuid;
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arg->u.enable_notify.gfn = gfn;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_create_view(xc_interface *handle, uint32_t domid,
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xenmem_access_t default_access, uint16_t *view_id)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_create_p2m;
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arg->domain = domid;
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arg->u.view.view = -1;
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arg->u.view.hvmmem_default_access = default_access;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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if ( !rc )
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*view_id = arg->u.view.view;
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_destroy_view(xc_interface *handle, uint32_t domid,
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uint16_t view_id)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_destroy_p2m;
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arg->domain = domid;
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arg->u.view.view = view_id;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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/* Switch all vCPUs of the domain to the specified altp2m view */
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int xc_altp2m_switch_to_view(xc_interface *handle, uint32_t domid,
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uint16_t view_id)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_switch_p2m;
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arg->domain = domid;
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arg->u.view.view = view_id;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_get_suppress_ve(xc_interface *handle, uint32_t domid,
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uint16_t view_id, xen_pfn_t gfn, bool *sve)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_get_suppress_ve;
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arg->domain = domid;
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arg->u.suppress_ve.view = view_id;
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arg->u.suppress_ve.gfn = gfn;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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if ( !rc )
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*sve = arg->u.suppress_ve.suppress_ve;
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_set_suppress_ve(xc_interface *handle, uint32_t domid,
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uint16_t view_id, xen_pfn_t gfn, bool sve)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_set_suppress_ve;
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arg->domain = domid;
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arg->u.suppress_ve.view = view_id;
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arg->u.suppress_ve.gfn = gfn;
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arg->u.suppress_ve.suppress_ve = sve;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_set_mem_access(xc_interface *handle, uint32_t domid,
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uint16_t view_id, xen_pfn_t gfn,
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xenmem_access_t access)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_set_mem_access;
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arg->domain = domid;
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arg->u.mem_access.view = view_id;
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arg->u.mem_access.access = access;
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arg->u.mem_access.gfn = gfn;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_change_gfn(xc_interface *handle, uint32_t domid,
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uint16_t view_id, xen_pfn_t old_gfn,
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xen_pfn_t new_gfn)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_change_gfn;
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arg->domain = domid;
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arg->u.change_gfn.view = view_id;
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arg->u.change_gfn.old_gfn = old_gfn;
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arg->u.change_gfn.new_gfn = new_gfn;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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int xc_altp2m_set_mem_access_multi(xc_interface *xch, uint32_t domid,
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uint16_t view_id, uint8_t *access,
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uint64_t *gfns, uint32_t nr)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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DECLARE_HYPERCALL_BOUNCE(access, nr * sizeof(*access),
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XC_HYPERCALL_BUFFER_BOUNCE_IN);
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DECLARE_HYPERCALL_BOUNCE(gfns, nr * sizeof(*gfns),
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XC_HYPERCALL_BUFFER_BOUNCE_IN);
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arg = xc_hypercall_buffer_alloc(xch, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_set_mem_access_multi;
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arg->domain = domid;
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arg->u.set_mem_access_multi.view = view_id;
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arg->u.set_mem_access_multi.nr = nr;
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if ( xc_hypercall_bounce_pre(xch, gfns) ||
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xc_hypercall_bounce_pre(xch, access) )
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{
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PERROR("Could not bounce memory for HVMOP_altp2m_set_mem_access_multi");
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return -1;
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}
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set_xen_guest_handle(arg->u.set_mem_access_multi.pfn_list, gfns);
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set_xen_guest_handle(arg->u.set_mem_access_multi.access_list, access);
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rc = xencall2(xch->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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xc_hypercall_buffer_free(xch, arg);
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xc_hypercall_bounce_post(xch, access);
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xc_hypercall_bounce_post(xch, gfns);
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return rc;
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}
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int xc_altp2m_get_mem_access(xc_interface *handle, uint32_t domid,
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uint16_t view_id, xen_pfn_t gfn,
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xenmem_access_t *access)
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{
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int rc;
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DECLARE_HYPERCALL_BUFFER(xen_hvm_altp2m_op_t, arg);
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arg = xc_hypercall_buffer_alloc(handle, arg, sizeof(*arg));
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if ( arg == NULL )
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return -1;
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arg->version = HVMOP_ALTP2M_INTERFACE_VERSION;
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arg->cmd = HVMOP_altp2m_get_mem_access;
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arg->domain = domid;
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arg->u.mem_access.view = view_id;
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arg->u.mem_access.gfn = gfn;
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rc = xencall2(handle->xcall, __HYPERVISOR_hvm_op, HVMOP_altp2m,
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HYPERCALL_BUFFER_AS_ARG(arg));
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if ( !rc )
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*access = arg->u.mem_access.access;
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xc_hypercall_buffer_free(handle, arg);
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return rc;
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}
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