mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 02:56:47 +07:00
27b190bd9f
As conditional instructions can trap on AArch32, add the thinest possible emulation layer to keep 32bit guests happy. Reviewed-by: Christopher Covington <cov@codeaurora.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
181 lines
4.9 KiB
C
181 lines
4.9 KiB
C
/*
|
|
* Copyright (C) 2012,2013 - ARM Ltd
|
|
* Author: Marc Zyngier <marc.zyngier@arm.com>
|
|
*
|
|
* Derived from arch/arm/include/kvm_emulate.h
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __ARM64_KVM_EMULATE_H__
|
|
#define __ARM64_KVM_EMULATE_H__
|
|
|
|
#include <linux/kvm_host.h>
|
|
#include <asm/kvm_asm.h>
|
|
#include <asm/kvm_arm.h>
|
|
#include <asm/kvm_mmio.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
|
|
unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);
|
|
|
|
bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
|
|
void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
|
|
|
|
void kvm_inject_undefined(struct kvm_vcpu *vcpu);
|
|
void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
|
|
void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
|
|
|
|
static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
|
|
}
|
|
|
|
static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
|
|
}
|
|
|
|
static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
|
|
}
|
|
|
|
static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
|
|
}
|
|
|
|
static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
|
|
{
|
|
if (vcpu_mode_is_32bit(vcpu))
|
|
return kvm_condition_valid32(vcpu);
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
|
|
{
|
|
if (vcpu_mode_is_32bit(vcpu))
|
|
kvm_skip_instr32(vcpu, is_wide_instr);
|
|
else
|
|
*vcpu_pc(vcpu) += 4;
|
|
}
|
|
|
|
static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
|
|
{
|
|
*vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
|
|
}
|
|
|
|
static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
|
|
{
|
|
if (vcpu_mode_is_32bit(vcpu))
|
|
return vcpu_reg32(vcpu, reg_num);
|
|
|
|
return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
|
|
}
|
|
|
|
/* Get vcpu SPSR for current mode */
|
|
static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
|
|
{
|
|
if (vcpu_mode_is_32bit(vcpu))
|
|
return vcpu_spsr32(vcpu);
|
|
|
|
return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
|
|
}
|
|
|
|
static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
|
|
{
|
|
u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
|
|
|
|
if (vcpu_mode_is_32bit(vcpu))
|
|
return mode > COMPAT_PSR_MODE_USR;
|
|
|
|
return mode != PSR_MODE_EL0t;
|
|
}
|
|
|
|
static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.fault.esr_el2;
|
|
}
|
|
|
|
static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.fault.far_el2;
|
|
}
|
|
|
|
static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
|
|
}
|
|
|
|
static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV);
|
|
}
|
|
|
|
static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR);
|
|
}
|
|
|
|
static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE);
|
|
}
|
|
|
|
static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT;
|
|
}
|
|
|
|
static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA);
|
|
}
|
|
|
|
static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW);
|
|
}
|
|
|
|
static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT);
|
|
}
|
|
|
|
/* This one is not specific to Data Abort */
|
|
static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL);
|
|
}
|
|
|
|
static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT;
|
|
}
|
|
|
|
static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT;
|
|
}
|
|
|
|
static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE;
|
|
}
|
|
|
|
#endif /* __ARM64_KVM_EMULATE_H__ */
|