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0d97f88481
arm64 uses its own copy of exit handler (arm64/kvm/handle_exit.c). Currently this file doesn't hook up with any trace points. As a result users might not see certain events (e.g. HVC & WFI) while using ftrace with arm64 KVM. This patch fixes this issue by adding a new trace file and defining two trace events (one of which is shared by wfi and wfe) for arm64. The new trace points are then linked with related functions in handle_exit.c. Signed-off-by: Wei Huang <wei@redhat.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
279 lines
6.9 KiB
C
279 lines
6.9 KiB
C
/*
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* Copyright (C) 2012,2013 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* Derived from arch/arm/include/kvm_emulate.h
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Author: Christoffer Dall <c.dall@virtualopensystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ARM64_KVM_EMULATE_H__
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#define __ARM64_KVM_EMULATE_H__
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#include <linux/kvm_host.h>
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#include <asm/kvm_asm.h>
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#include <asm/kvm_arm.h>
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#include <asm/kvm_mmio.h>
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#include <asm/ptrace.h>
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unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
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unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);
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bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
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void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
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void kvm_inject_undefined(struct kvm_vcpu *vcpu);
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void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
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void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
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static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
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{
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vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
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}
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static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
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{
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return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
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}
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static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
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{
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return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
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}
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static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
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{
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return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
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}
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static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
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{
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return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
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}
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static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
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{
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if (vcpu_mode_is_32bit(vcpu))
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return kvm_condition_valid32(vcpu);
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return true;
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}
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static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
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{
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if (vcpu_mode_is_32bit(vcpu))
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kvm_skip_instr32(vcpu, is_wide_instr);
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else
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*vcpu_pc(vcpu) += 4;
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}
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static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
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{
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*vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
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}
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static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
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{
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if (vcpu_mode_is_32bit(vcpu))
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return vcpu_reg32(vcpu, reg_num);
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return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
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}
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/* Get vcpu SPSR for current mode */
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static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
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{
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if (vcpu_mode_is_32bit(vcpu))
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return vcpu_spsr32(vcpu);
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return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
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}
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static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
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{
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u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
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if (vcpu_mode_is_32bit(vcpu))
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return mode > COMPAT_PSR_MODE_USR;
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return mode != PSR_MODE_EL0t;
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}
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static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.fault.esr_el2;
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}
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static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.fault.far_el2;
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}
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static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
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{
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return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
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}
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static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu)
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{
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return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_HVC_IMM_MASK;
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}
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static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
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{
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return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV);
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}
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static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
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{
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return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR);
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}
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static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
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{
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return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE);
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}
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static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
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{
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return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT;
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}
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static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
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{
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return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA);
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}
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static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
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{
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return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW);
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}
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static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
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{
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return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT);
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}
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/* This one is not specific to Data Abort */
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static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
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{
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return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL);
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}
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static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
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{
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return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT;
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}
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static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
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{
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return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT;
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}
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static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
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{
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return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC;
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}
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static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
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{
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return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE;
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}
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static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu)
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{
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return vcpu_sys_reg(vcpu, MPIDR_EL1);
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}
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static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
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{
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if (vcpu_mode_is_32bit(vcpu))
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*vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
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else
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vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
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}
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static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
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{
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if (vcpu_mode_is_32bit(vcpu))
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return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
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return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
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}
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static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
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unsigned long data,
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unsigned int len)
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{
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if (kvm_vcpu_is_be(vcpu)) {
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switch (len) {
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case 1:
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return data & 0xff;
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case 2:
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return be16_to_cpu(data & 0xffff);
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case 4:
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return be32_to_cpu(data & 0xffffffff);
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default:
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return be64_to_cpu(data);
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}
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} else {
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switch (len) {
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case 1:
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return data & 0xff;
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case 2:
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return le16_to_cpu(data & 0xffff);
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case 4:
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return le32_to_cpu(data & 0xffffffff);
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default:
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return le64_to_cpu(data);
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}
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}
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return data; /* Leave LE untouched */
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}
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static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
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unsigned long data,
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unsigned int len)
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{
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if (kvm_vcpu_is_be(vcpu)) {
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switch (len) {
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case 1:
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return data & 0xff;
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case 2:
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return cpu_to_be16(data & 0xffff);
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case 4:
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return cpu_to_be32(data & 0xffffffff);
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default:
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return cpu_to_be64(data);
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}
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} else {
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switch (len) {
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case 1:
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return data & 0xff;
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case 2:
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return cpu_to_le16(data & 0xffff);
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case 4:
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return cpu_to_le32(data & 0xffffffff);
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default:
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return cpu_to_le64(data);
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}
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}
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return data; /* Leave LE untouched */
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}
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#endif /* __ARM64_KVM_EMULATE_H__ */
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