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/*
* Copyright (C) 2012,2013 - ARM Ltd
* Author: Marc Zyngier <marc.zyngier@arm.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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ARM_KVM_ASM_H__
#define __ARM_KVM_ASM_H__
#include <asm/virt.h>
#define ARM_EXCEPTION_IRQ 0
#define ARM_EXCEPTION_TRAP 1
/* The hyp-stub will return this for any kvm_call_hyp() call */
#define ARM_EXCEPTION_HYP_GONE 2
#define KVM_ARM64_DEBUG_DIRTY_SHIFT 0
#define KVM_ARM64_DEBUG_DIRTY (1 << KVM_ARM64_DEBUG_DIRTY_SHIFT)
#define kvm_ksym_ref(sym) ((void *)&sym + kvm_ksym_shift)
#ifndef __ASSEMBLY__
#if __GNUC__ > 4
#define kvm_ksym_shift (PAGE_OFFSET - KIMAGE_VADDR)
#else
/*
* GCC versions 4.9 and older will fold the constant below into the addend of
* the reference to 'sym' above if kvm_ksym_shift is declared static or if the
* constant is used directly. However, since we use the small code model for
* the core kernel, the reference to 'sym' will be emitted as a adrp/add pair,
* with a +/- 4 GB range, resulting in linker relocation errors if the shift
* is sufficiently large. So prevent the compiler from folding the shift into
* the addend, by making the shift a variable with external linkage.
*/
__weak u64 kvm_ksym_shift = PAGE_OFFSET - KIMAGE_VADDR;
#endif
struct kvm;
struct kvm_vcpu;
extern char __kvm_hyp_init[];
extern char __kvm_hyp_init_end[];
extern char __kvm_hyp_reset[];
extern char __kvm_hyp_vector[];
#define __kvm_hyp_code_start __hyp_text_start
#define __kvm_hyp_code_end __hyp_text_end
extern void __kvm_flush_vm_context(void);
extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
extern void __kvm_tlb_flush_vmid(struct kvm *kvm);
extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
extern u64 __vgic_v3_get_ich_vtr_el2(void);
extern u32 __kvm_get_mdcr_el2(void);
#endif
#endif /* __ARM_KVM_ASM_H__ */
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