Provide the reset code for a virtual CPU booted in 64bit mode. Reviewed-by: Christopher Covington <cov@xxxxxxxxxxxxxx> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> --- arch/arm64/kvm/reset.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 arch/arm64/kvm/reset.c diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c new file mode 100644 index 0000000..84112e0 --- /dev/null +++ b/arch/arm64/kvm/reset.c @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2012,2013 - ARM Ltd + * Author: Marc Zyngier <marc.zyngier@xxxxxxx> + * + * Derived from arch/arm/kvm/reset.c + * Copyright (C) 2012 - Virtual Open Systems and Columbia University + * Author: Christoffer Dall <c.dall@xxxxxxxxxxxxxxxxxxxxxx> + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/errno.h> +#include <linux/kvm_host.h> +#include <linux/kvm.h> + +#include <asm/cputype.h> +#include <asm/ptrace.h> +#include <asm/kvm_arm.h> +#include <asm/kvm_coproc.h> + +/* + * ARMv8 Reset Values + */ +static struct kvm_regs default_regs_reset = { + .regs.pstate = (PSR_MODE_EL1h | PSR_A_BIT | PSR_I_BIT | + PSR_F_BIT | PSR_D_BIT), +}; + +int kvm_arch_dev_ioctl_check_extension(long ext) +{ + int r; + + switch (ext) { + default: + r = 0; + } + + return r; +} + + +/** + * kvm_reset_vcpu - sets core registers and sys_regs 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) { + default: + cpu_reset = &default_regs_reset; + break; + } + + /* Reset core registers */ + memcpy(vcpu_gp_regs(vcpu), cpu_reset, sizeof(*cpu_reset)); + + /* Reset system registers */ + kvm_reset_sys_regs(vcpu); + + return 0; +} -- 1.8.2.3 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
