| Message ID | 1463650411-13597-1-git-send-email-thuth@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 19.05.2016 11:33, Thomas Huth wrote: > vcpu->arch.shadow_srr1 only contains usable values for injecting > a program exception into the guest if we entered the function > kvmppc_handle_exit_pr() with exit_nr == BOOK3S_INTERRUPT_PROGRAM. > In other cases, the shadow_srr1 bits are zero. Since we want to > pass an illegal-instruction program check to the guest, set > "flags" to SRR1_PROGILL for these other cases. > > Signed-off-by: Thomas Huth <thuth@redhat.com> > --- > v2: Added a comment, as suggested by Alexander Graf > > arch/powerpc/kvm/book3s_pr.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c > index 95bceca..e67b8ea 100644 > --- a/arch/powerpc/kvm/book3s_pr.c > +++ b/arch/powerpc/kvm/book3s_pr.c > @@ -1031,7 +1031,17 @@ int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu, > int emul; > > program_interrupt: > - flags = vcpu->arch.shadow_srr1 & 0x1f0000ull; > + /* > + * shadow_srr1 only contains valid flags if we came here via > + * a program exception. The other exceptions (emulation assist, > + * FP unavailable, etc.) do not provide flags in SRR1, so use > + * an illegal-instruction exception when injecting a program > + * interrupt into the guest. > + */ > + if (exit_nr == BOOK3S_INTERRUPT_PROGRAM) > + flags = vcpu->arch.shadow_srr1 & 0x1f0000ull; > + else > + flags = SRR1_PROGILL; > > emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); > if (emul != EMULATE_DONE) { > *ping* Thomas -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thu, May 19, 2016 at 11:33:31AM +0200, Thomas Huth wrote: > vcpu->arch.shadow_srr1 only contains usable values for injecting > a program exception into the guest if we entered the function > kvmppc_handle_exit_pr() with exit_nr == BOOK3S_INTERRUPT_PROGRAM. > In other cases, the shadow_srr1 bits are zero. Since we want to > pass an illegal-instruction program check to the guest, set > "flags" to SRR1_PROGILL for these other cases. > > Signed-off-by: Thomas Huth <thuth@redhat.com> Thanks, applied to my kvm-ppc-next branch. Paul. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 95bceca..e67b8ea 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -1031,7 +1031,17 @@ int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu, int emul; program_interrupt: - flags = vcpu->arch.shadow_srr1 & 0x1f0000ull; + /* + * shadow_srr1 only contains valid flags if we came here via + * a program exception. The other exceptions (emulation assist, + * FP unavailable, etc.) do not provide flags in SRR1, so use + * an illegal-instruction exception when injecting a program + * interrupt into the guest. + */ + if (exit_nr == BOOK3S_INTERRUPT_PROGRAM) + flags = vcpu->arch.shadow_srr1 & 0x1f0000ull; + else + flags = SRR1_PROGILL; emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); if (emul != EMULATE_DONE) {
vcpu->arch.shadow_srr1 only contains usable values for injecting a program exception into the guest if we entered the function kvmppc_handle_exit_pr() with exit_nr == BOOK3S_INTERRUPT_PROGRAM. In other cases, the shadow_srr1 bits are zero. Since we want to pass an illegal-instruction program check to the guest, set "flags" to SRR1_PROGILL for these other cases. Signed-off-by: Thomas Huth <thuth@redhat.com> --- v2: Added a comment, as suggested by Alexander Graf arch/powerpc/kvm/book3s_pr.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)