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| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2014-09-09 22:37:36 +0530 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-09-22 10:11:36 +0200 |
| commit | 033aaa14af0251285226a7dafc11c24a13959bca (patch) | |
| tree | 8d71dd7d94ff7e9ae42a53d1b90514f182880613 /arch/powerpc/kvm/booke.c | |
| parent | a59c1d9e609c4bbad9ec3b238221ecf3b9ca091b (diff) | |
| download | linux-stable-033aaa14af0251285226a7dafc11c24a13959bca.tar.gz linux-stable-033aaa14af0251285226a7dafc11c24a13959bca.tar.bz2 linux-stable-033aaa14af0251285226a7dafc11c24a13959bca.zip | |
powerpc/kvm: common sw breakpoint instr across ppc
This patch extends the use of illegal instruction as software
breakpoint instruction across the ppc platform. Patch extends
booke program interrupt code to support software breakpoint.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
[agraf: Fix bookehv]
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/booke.c')
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 97ec5b7fce9c..ed5b0dd58726 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -994,6 +994,11 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, case BOOKE_INTERRUPT_HV_PRIV: emulated = kvmppc_get_last_inst(vcpu, false, &last_inst); break; + case BOOKE_INTERRUPT_PROGRAM: + /* SW breakpoints arrive as illegal instructions on HV */ + if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) + emulated = kvmppc_get_last_inst(vcpu, false, &last_inst); + break; default: break; } @@ -1071,6 +1076,18 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, break; case BOOKE_INTERRUPT_PROGRAM: + if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) && + (last_inst == KVMPPC_INST_SW_BREAKPOINT)) { + /* + * We are here because of an SW breakpoint instr, + * so lets return to host to handle. + */ + r = kvmppc_handle_debug(run, vcpu); + run->exit_reason = KVM_EXIT_DEBUG; + kvmppc_account_exit(vcpu, DEBUG_EXITS); + break; + } + if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) { /* * Program traps generated by user-level software must @@ -1647,7 +1664,7 @@ int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, *val = get_reg_val(id, vcpu->arch.tsr); break; case KVM_REG_PPC_DEBUG_INST: - *val = get_reg_val(id, KVMPPC_INST_EHPRIV_DEBUG); + *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); break; case KVM_REG_PPC_VRSAVE: *val = get_reg_val(id, vcpu->arch.vrsave); |