75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
|
||
|
|
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License, version 2, 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, write to the Free Software
|
||
|
|
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||
|
|
*/
|
||
|
|
#include <linux/compiler.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <linux/kvm_host.h>
|
||
|
|
#include <linux/kvm.h>
|
||
|
|
|
||
|
|
#include <asm/unified.h>
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
#include <asm/cputype.h>
|
||
|
|
#include <asm/kvm_arm.h>
|
||
|
|
#include <asm/kvm_coproc.h>
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
* Cortex-A15 Reset Values
|
||
|
|
*/
|
||
|
|
|
||
|
|
static const int a15_max_cpu_idx = 3;
|
||
|
|
|
||
|
|
static struct kvm_regs a15_regs_reset = {
|
||
|
|
.usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT,
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
* Exported reset function
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* kvm_reset_vcpu - sets core registers and cp15 registers to reset value
|
||
|
|
* @vcpu: The VCPU pointer
|
||
|
|
*
|
||
|
|
* This function finds the right table above and sets the registers on the
|
||
|
|
* virtual CPU struct to their architectually defined reset values.
|
||
|
|
*/
|
||
|
|
int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
|
||
|
|
{
|
||
|
|
struct kvm_regs *cpu_reset;
|
||
|
|
|
||
|
|
switch (vcpu->arch.target) {
|
||
|
|
case KVM_ARM_TARGET_CORTEX_A15:
|
||
|
|
if (vcpu->vcpu_id > a15_max_cpu_idx)
|
||
|
|
return -EINVAL;
|
||
|
|
cpu_reset = &a15_regs_reset;
|
||
|
|
vcpu->arch.midr = read_cpuid_id();
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Reset core registers */
|
||
|
|
memcpy(&vcpu->arch.regs, cpu_reset, sizeof(vcpu->arch.regs));
|
||
|
|
|
||
|
|
/* Reset CP15 registers */
|
||
|
|
kvm_reset_coprocs(vcpu);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|