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/*
* arch/arm/vm_event.c
*
* Architecture-specific vm_event handling routines
*
* Copyright (c) 2016 Tamas K Lengyel (tamas.lengyel@zentific.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; If not, see <http://www.gnu.org/licenses/>.
*/
#include <xen/sched.h>
#include <asm/vm_event.h>
void vm_event_fill_regs(vm_event_request_t *req)
{
const struct cpu_user_regs *regs = guest_cpu_user_regs();
req->data.regs.arm.cpsr = regs->cpsr;
req->data.regs.arm.pc = regs->pc;
req->data.regs.arm.ttbcr = READ_SYSREG(TCR_EL1);
req->data.regs.arm.ttbr0 = READ_SYSREG64(TTBR0_EL1);
req->data.regs.arm.ttbr1 = READ_SYSREG64(TTBR1_EL1);
}
void vm_event_set_registers(struct vcpu *v, vm_event_response_t *rsp)
{
struct cpu_user_regs *regs = &v->arch.cpu_info->guest_cpu_user_regs;
/* vCPU should be paused */
ASSERT(atomic_read(&v->vm_event_pause_count));
regs->pc = rsp->data.regs.arm.pc;
}
void vm_event_monitor_next_interrupt(struct vcpu *v)
{
/* Not supported on ARM. */
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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