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Christoffer Dall authored
The following three ioctls are implemented: - KVM_GET_REG_LIST - KVM_GET_ONE_REG - KVM_SET_ONE_REG Now we have a table for all the cp15 registers, we can drive a generic API. The register IDs carry the following encoding: ARM registers are mapped using the lower 32 bits. The upper 16 of that is the register group type, or coprocessor number: ARM 32-bit CP15 registers have the following id bit patterns: 0x4002 0000 000F <zero:1> <crn:4> <crm:4> <opc1:4> <opc2:3> ARM 64-bit CP15 registers have the following id bit patterns: 0x4003 0000 000F <zero:1> <zero:4> <crm:4> <opc1:4> <zero:3> For futureproofing, we need to tell QEMU about the CP15 registers the host lets the guest access. It will need this information to restore a current guest on a future CPU or perhaps a future KVM which allow some of these to be changed. We use a separate table for these, as they're only for the userspace API. Reviewed-by:
Will Deacon <will.deacon@arm.com> Reviewed-by:
Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Christoffer Dall <c.dall@virtualopensystems.com>
Christoffer Dall authoredThe following three ioctls are implemented: - KVM_GET_REG_LIST - KVM_GET_ONE_REG - KVM_SET_ONE_REG Now we have a table for all the cp15 registers, we can drive a generic API. The register IDs carry the following encoding: ARM registers are mapped using the lower 32 bits. The upper 16 of that is the register group type, or coprocessor number: ARM 32-bit CP15 registers have the following id bit patterns: 0x4002 0000 000F <zero:1> <crn:4> <crm:4> <opc1:4> <opc2:3> ARM 64-bit CP15 registers have the following id bit patterns: 0x4003 0000 000F <zero:1> <zero:4> <crm:4> <opc1:4> <zero:3> For futureproofing, we need to tell QEMU about the CP15 registers the host lets the guest access. It will need this information to restore a current guest on a future CPU or perhaps a future KVM which allow some of these to be changed. We use a separate table for these, as they're only for the userspace API. Reviewed-by:
kvm_coproc.h 1.93 KiB
/*
* Copyright (C) 2012 Rusty Russell IBM Corporation
*
* 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.
*/
#ifndef __ARM_KVM_COPROC_H__
#define __ARM_KVM_COPROC_H__
#include <linux/kvm_host.h>
void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
struct kvm_coproc_target_table {
unsigned target;
const struct coproc_reg *table;
size_t num;
};
void kvm_register_target_coproc_table(struct kvm_coproc_target_table *table);
int kvm_handle_cp10_id(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_handle_cp_0_13_access(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_handle_cp14_access(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_handle_cp15_32(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_handle_cp15_64(struct kvm_vcpu *vcpu, struct kvm_run *run);
unsigned long kvm_arm_num_guest_msrs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_msrindices(struct kvm_vcpu *vcpu, u64 __user *uindices);
void kvm_coproc_table_init(void);
struct kvm_one_reg;
int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
#endif /* __ARM_KVM_COPROC_H__ */