diff options
| author | Simon Guo <wei.guo.simon@gmail.com> | 2018-05-23 10:02:06 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2018-06-01 03:30:39 +0300 |
| commit | 68ab07b985764ec5be816e7054a84b7ad121afc7 (patch) | |
| tree | ffbbcc23ebd5a6dff17e29fd1b0da97fc0b40f00 /arch/powerpc/kvm/book3s.h | |
| parent | 26798f88d58dff1b61abf04becf5055e6f860d4f (diff) | |
| download | linux-68ab07b985764ec5be816e7054a84b7ad121afc7.tar.xz | |
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>
Diffstat (limited to 'arch/powerpc/kvm/book3s.h')
| -rw-r--r-- | arch/powerpc/kvm/book3s.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s.h b/arch/powerpc/kvm/book3s.h index 4ad5e287b8bc..14ef03501d21 100644 --- a/arch/powerpc/kvm/book3s.h +++ b/arch/powerpc/kvm/book3s.h @@ -31,4 +31,10 @@ extern int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, 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 |