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| author | James Hogan <james.hogan@imgtec.com> | 2017-03-14 10:15:24 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2017-03-28 14:53:49 +0100 |
| commit | 28c1e762b01eee56ada8148c88c4f1e99beb5584 (patch) | |
| tree | 0032efa2b42d2fa3785949eab03d877da51efc57 /arch/mips/kvm | |
| parent | edab4fe1f6419fc3a1de3b134929ae2123bea3ad (diff) | |
| download | linux-28c1e762b01eee56ada8148c88c4f1e99beb5584.tar.bz2 | |
KVM: MIPS: Add guest exit exception callback
Add a callback for MIPS KVM implementations to handle the VZ guest
exit exception. Currently the trap & emulate implementation contains a
stub which reports an internal error, but the callback will be used
properly by the VZ implementation.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Diffstat (limited to 'arch/mips/kvm')
| -rw-r--r-- | arch/mips/kvm/mips.c | 5 | ||||
| -rw-r--r-- | arch/mips/kvm/trace.h | 2 | ||||
| -rw-r--r-- | arch/mips/kvm/trap_emul.c | 24 |
3 files changed, 31 insertions, 0 deletions
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index 5681117083af..6e91c2416278 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -1348,6 +1348,11 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) ret = kvm_mips_callbacks->handle_msa_disabled(vcpu); break; + case EXCCODE_GE: + /* defer exit accounting to handler */ + ret = kvm_mips_callbacks->handle_guest_exit(vcpu); + break; + default: if (cause & CAUSEF_BD) opc += 1; diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h index 6e43c89114b8..0c59282a2f7d 100644 --- a/arch/mips/kvm/trace.h +++ b/arch/mips/kvm/trace.h @@ -62,6 +62,7 @@ DEFINE_EVENT(kvm_transition, kvm_out, #define KVM_TRACE_EXIT_MSA_FPE 14 #define KVM_TRACE_EXIT_FPE 15 #define KVM_TRACE_EXIT_MSA_DISABLED 21 +#define KVM_TRACE_EXIT_GUEST_EXIT 27 /* Further exit reasons */ #define KVM_TRACE_EXIT_WAIT 32 #define KVM_TRACE_EXIT_CACHE 33 @@ -92,6 +93,7 @@ DEFINE_EVENT(kvm_transition, kvm_out, { KVM_TRACE_EXIT_MSA_FPE, "MSA FPE" }, \ { KVM_TRACE_EXIT_FPE, "FPE" }, \ { KVM_TRACE_EXIT_MSA_DISABLED, "MSA Disabled" }, \ + { KVM_TRACE_EXIT_GUEST_EXIT, "Guest Exit" }, \ { KVM_TRACE_EXIT_WAIT, "WAIT" }, \ { KVM_TRACE_EXIT_CACHE, "CACHE" }, \ { KVM_TRACE_EXIT_SIGNAL, "Signal" }, \ diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c index 50b812bfe083..fda45b4bdebc 100644 --- a/arch/mips/kvm/trap_emul.c +++ b/arch/mips/kvm/trap_emul.c @@ -40,6 +40,29 @@ static gpa_t kvm_trap_emul_gva_to_gpa_cb(gva_t gva) return gpa; } +static int kvm_trap_emul_no_handler(struct kvm_vcpu *vcpu) +{ + u32 __user *opc = (u32 __user *) vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; + u32 exccode = (cause & CAUSEF_EXCCODE) >> CAUSEB_EXCCODE; + unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; + u32 inst = 0; + + /* + * Fetch the instruction. + */ + if (cause & CAUSEF_BD) + opc += 1; + kvm_get_badinstr(opc, vcpu, &inst); + + kvm_err("Exception Code: %d not handled @ PC: %p, inst: 0x%08x BadVaddr: %#lx Status: %#lx\n", + exccode, opc, inst, badvaddr, + kvm_read_c0_guest_status(vcpu->arch.cop0)); + kvm_arch_vcpu_dump_regs(vcpu); + vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + return RESUME_HOST; +} + static int kvm_trap_emul_handle_cop_unusable(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; @@ -1262,6 +1285,7 @@ static struct kvm_mips_callbacks kvm_trap_emul_callbacks = { .handle_msa_fpe = kvm_trap_emul_handle_msa_fpe, .handle_fpe = kvm_trap_emul_handle_fpe, .handle_msa_disabled = kvm_trap_emul_handle_msa_disabled, + .handle_guest_exit = kvm_trap_emul_no_handler, .hardware_enable = kvm_trap_emul_hardware_enable, .hardware_disable = kvm_trap_emul_hardware_disable, |