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https://github.com/xen-project/xen.git
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Razvan Cojocaru
712bdd0185
As suggested by Andrew Cooper, this patch attempts to remove some redundancy and allow for an easier time when adding vm_events for new control registers in the future, by having a single VM_EVENT_REASON_WRITE_CTRLREG vm_event type, meant to serve CR0, CR3, CR4 and (newly introduced) XCR0. The actual control register will be deduced by the new .index field in vm_event_write_ctrlreg (renamed from vm_event_mov_to_cr). Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com> Acked-by: Jan Beulich <jbeulich@suse.com> Acked-by: Kevin Tian <kevin.tian@intel.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Tim Deegan <tim@xen.org>
108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/******************************************************************************
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*
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* xc_monitor.c
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*
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* Interface to VM event monitor
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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, 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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void *xc_monitor_enable(xc_interface *xch, domid_t domain_id, uint32_t *port)
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{
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return xc_vm_event_enable(xch, domain_id, HVM_PARAM_MONITOR_RING_PFN,
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port);
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}
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int xc_monitor_disable(xc_interface *xch, domid_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_MONITOR,
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NULL);
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}
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int xc_monitor_resume(xc_interface *xch, domid_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_MONITOR,
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NULL);
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}
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int xc_monitor_write_ctrlreg(xc_interface *xch, domid_t domain_id,
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uint16_t index, bool enable, bool sync,
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bool onchangeonly)
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{
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DECLARE_DOMCTL;
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domctl.cmd = XEN_DOMCTL_monitor_op;
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domctl.domain = domain_id;
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domctl.u.monitor_op.op = enable ? XEN_DOMCTL_MONITOR_OP_ENABLE
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: XEN_DOMCTL_MONITOR_OP_DISABLE;
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domctl.u.monitor_op.event = XEN_DOMCTL_MONITOR_EVENT_WRITE_CTRLREG;
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domctl.u.monitor_op.u.mov_to_cr.index = index;
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domctl.u.monitor_op.u.mov_to_cr.sync = sync;
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domctl.u.monitor_op.u.mov_to_cr.onchangeonly = onchangeonly;
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return do_domctl(xch, &domctl);
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}
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int xc_monitor_mov_to_msr(xc_interface *xch, domid_t domain_id, bool enable,
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bool extended_capture)
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{
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DECLARE_DOMCTL;
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domctl.cmd = XEN_DOMCTL_monitor_op;
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domctl.domain = domain_id;
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domctl.u.monitor_op.op = enable ? XEN_DOMCTL_MONITOR_OP_ENABLE
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: XEN_DOMCTL_MONITOR_OP_DISABLE;
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domctl.u.monitor_op.event = XEN_DOMCTL_MONITOR_EVENT_MOV_TO_MSR;
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domctl.u.monitor_op.u.mov_to_msr.extended_capture = extended_capture;
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return do_domctl(xch, &domctl);
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}
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int xc_monitor_software_breakpoint(xc_interface *xch, domid_t domain_id,
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bool enable)
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{
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DECLARE_DOMCTL;
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domctl.cmd = XEN_DOMCTL_monitor_op;
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domctl.domain = domain_id;
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domctl.u.monitor_op.op = enable ? XEN_DOMCTL_MONITOR_OP_ENABLE
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: XEN_DOMCTL_MONITOR_OP_DISABLE;
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domctl.u.monitor_op.event = XEN_DOMCTL_MONITOR_EVENT_SOFTWARE_BREAKPOINT;
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return do_domctl(xch, &domctl);
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}
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int xc_monitor_singlestep(xc_interface *xch, domid_t domain_id,
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bool enable)
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{
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DECLARE_DOMCTL;
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domctl.cmd = XEN_DOMCTL_monitor_op;
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domctl.domain = domain_id;
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domctl.u.monitor_op.op = enable ? XEN_DOMCTL_MONITOR_OP_ENABLE
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: XEN_DOMCTL_MONITOR_OP_DISABLE;
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domctl.u.monitor_op.event = XEN_DOMCTL_MONITOR_EVENT_SINGLESTEP;
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return do_domctl(xch, &domctl);
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}
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