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736017752d
MMIO emulation reads the last instruction executed by the guest and then emulates. If the guest is running in Little Endian order, or more generally in a different endian order of the host, the instruction needs to be byte-swapped before being emulated. This patch adds a helper routine which tests the endian order of the host and the guest in order to decide whether a byteswap is needed or not. It is then used to byteswap the last instruction of the guest in the endian order of the host before MMIO emulation is performed. Finally, kvmppc_handle_load() of kvmppc_handle_store() are modified to reverse the endianness of the MMIO if required. Signed-off-by: Cédric Le Goater <clg@fr.ibm.com> [agraf: add booke handling] Signed-off-by: Alexander Graf <agraf@suse.de>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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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, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright SUSE Linux Products GmbH 2010
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*
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* Authors: Alexander Graf <agraf@suse.de>
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*/
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#ifndef __ASM_KVM_BOOKE_H__
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#define __ASM_KVM_BOOKE_H__
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#include <linux/types.h>
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#include <linux/kvm_host.h>
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/* LPIDs we support with this build -- runtime limit may be lower */
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#define KVMPPC_NR_LPIDS 64
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#define KVMPPC_INST_EHPRIV 0x7c00021c
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#define EHPRIV_OC_SHIFT 11
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/* "ehpriv 1" : ehpriv with OC = 1 is used for debug emulation */
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#define EHPRIV_OC_DEBUG 1
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#define KVMPPC_INST_EHPRIV_DEBUG (KVMPPC_INST_EHPRIV | \
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(EHPRIV_OC_DEBUG << EHPRIV_OC_SHIFT))
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static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
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{
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vcpu->arch.gpr[num] = val;
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}
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static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
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{
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return vcpu->arch.gpr[num];
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}
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static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
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{
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vcpu->arch.cr = val;
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}
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static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.cr;
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}
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static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
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{
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vcpu->arch.xer = val;
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}
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static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.xer;
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}
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static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu)
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{
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/* XXX Would need to check TLB entry */
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return false;
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}
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static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.last_inst;
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}
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static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
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{
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vcpu->arch.ctr = val;
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}
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static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.ctr;
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}
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static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
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{
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vcpu->arch.lr = val;
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}
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static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.lr;
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}
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static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
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{
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vcpu->arch.pc = val;
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}
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static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.pc;
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}
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static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.fault_dear;
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}
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static inline ulong kvmppc_get_msr(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.shared->msr;
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}
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#endif /* __ASM_KVM_BOOKE_H__ */
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