linux/arch/powerpc/kvm/book3s.h
Simon Guo 68ab07b985 KVM: PPC: Book3S PR: Add guard code to prevent returning to guest with PR=0 and Transactional state
Currently PR KVM doesn't support transaction memory in guest privileged
state.

This patch adds a check at setting guest msr, so that we can never return
to guest with PR=0 and TS=0b10. A tabort will be emulated to indicate
this and fail transaction immediately.

[paulus@ozlabs.org - don't change the TM_CAUSE_MISC definition, instead
 use TM_CAUSE_KVM_FAC_UNAV.]

Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2018-06-01 10:30:39 +10:00

41 lines
1.5 KiB
C

/*
* Copyright IBM Corporation, 2013
* Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License or (at your optional) any later version of the license.
*
*/
#ifndef __POWERPC_KVM_BOOK3S_H__
#define __POWERPC_KVM_BOOK3S_H__
extern void kvmppc_core_flush_memslot_hv(struct kvm *kvm,
struct kvm_memory_slot *memslot);
extern int kvm_unmap_hva_range_hv(struct kvm *kvm, unsigned long start,
unsigned long end);
extern int kvm_age_hva_hv(struct kvm *kvm, unsigned long start,
unsigned long end);
extern int kvm_test_age_hva_hv(struct kvm *kvm, unsigned long hva);
extern void kvm_set_spte_hva_hv(struct kvm *kvm, unsigned long hva, pte_t pte);
extern void kvmppc_mmu_destroy_pr(struct kvm_vcpu *vcpu);
extern int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
unsigned int inst, int *advance);
extern int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu,
int sprn, ulong spr_val);
extern int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu,
int sprn, ulong *spr_val);
extern int kvmppc_book3s_init_pr(void);
extern void kvmppc_book3s_exit_pr(void);
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
extern void kvmppc_emulate_tabort(struct kvm_vcpu *vcpu, int ra_val);
#else
static inline void kvmppc_emulate_tabort(struct kvm_vcpu *vcpu, int ra_val) {}
#endif
#endif