45c5eb67da
This reduces host CPU usage when the guest is idle. However, the guest must set MSR[WE] in its idle loop, which Linux did not do until 2.6.26. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Jerone Young <jyoung5@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
94 lines
3.2 KiB
C
94 lines
3.2 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 IBM Corp. 2008
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#ifndef __POWERPC_KVM_PPC_H__
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#define __POWERPC_KVM_PPC_H__
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/* This file exists just so we can dereference kvm_vcpu, avoiding nested header
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* dependencies. */
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#include <linux/mutex.h>
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#include <linux/timer.h>
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#include <linux/types.h>
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#include <linux/kvm_types.h>
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#include <linux/kvm_host.h>
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struct kvm_tlb {
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struct tlbe guest_tlb[PPC44x_TLB_SIZE];
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struct tlbe shadow_tlb[PPC44x_TLB_SIZE];
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};
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enum emulation_result {
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EMULATE_DONE, /* no further processing */
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EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
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EMULATE_DO_DCR, /* kvm_run filled with DCR request */
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EMULATE_FAIL, /* can't emulate this instruction */
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};
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extern const unsigned char exception_priority[];
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extern const unsigned char priority_exception[];
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extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
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extern char kvmppc_handlers_start[];
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extern unsigned long kvmppc_handler_len;
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extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
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extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
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unsigned int rt, unsigned int bytes,
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int is_bigendian);
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extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
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u32 val, unsigned int bytes, int is_bigendian);
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extern int kvmppc_emulate_instruction(struct kvm_run *run,
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struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gfn_t gfn,
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u64 asid, u32 flags);
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extern void kvmppc_mmu_invalidate(struct kvm_vcpu *vcpu, u64 eaddr, u64 asid);
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extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
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extern void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu);
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static inline void kvmppc_queue_exception(struct kvm_vcpu *vcpu, int exception)
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{
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unsigned int priority = exception_priority[exception];
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set_bit(priority, &vcpu->arch.pending_exceptions);
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}
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static inline void kvmppc_clear_exception(struct kvm_vcpu *vcpu, int exception)
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{
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unsigned int priority = exception_priority[exception];
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clear_bit(priority, &vcpu->arch.pending_exceptions);
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}
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/* Helper function for "full" MSR writes. No need to call this if only EE is
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* changing. */
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static inline void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
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{
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if ((new_msr & MSR_PR) != (vcpu->arch.msr & MSR_PR))
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kvmppc_mmu_priv_switch(vcpu, new_msr & MSR_PR);
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vcpu->arch.msr = new_msr;
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if (vcpu->arch.msr & MSR_WE)
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kvm_vcpu_block(vcpu);
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}
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#endif /* __POWERPC_KVM_PPC_H__ */
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