diff options
| -rw-r--r-- | arch/x86/kvm/emulate.c | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index a1a7b27adf4..4dade6ac082 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1599,7 +1599,7 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt) /* syscall is not available in real mode */ if (ctxt->mode == X86EMUL_MODE_REAL || ctxt->mode == X86EMUL_MODE_VM86) - return -1; + return X86EMUL_UNHANDLEABLE; setup_syscalls_segments(ctxt, &cs, &ss); @@ -1636,7 +1636,7 @@ emulate_syscall(struct x86_emulate_ctxt *ctxt) ctxt->eflags &= ~(EFLG_VM | EFLG_IF | EFLG_RF); } - return 0; + return X86EMUL_CONTINUE; } static int @@ -1649,14 +1649,14 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt) /* inject #GP if in real mode */ if (ctxt->mode == X86EMUL_MODE_REAL) { kvm_inject_gp(ctxt->vcpu, 0); - return -1; + return X86EMUL_UNHANDLEABLE; } /* XXX sysenter/sysexit have not been tested in 64bit mode. * Therefore, we inject an #UD. */ if (ctxt->mode == X86EMUL_MODE_PROT64) - return -1; + return X86EMUL_UNHANDLEABLE; setup_syscalls_segments(ctxt, &cs, &ss); @@ -1665,13 +1665,13 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt) case X86EMUL_MODE_PROT32: if ((msr_data & 0xfffc) == 0x0) { kvm_inject_gp(ctxt->vcpu, 0); - return -1; + return X86EMUL_PROPAGATE_FAULT; } break; case X86EMUL_MODE_PROT64: if (msr_data == 0x0) { kvm_inject_gp(ctxt->vcpu, 0); - return -1; + return X86EMUL_PROPAGATE_FAULT; } break; } @@ -1696,7 +1696,7 @@ emulate_sysenter(struct x86_emulate_ctxt *ctxt) kvm_x86_ops->get_msr(ctxt->vcpu, MSR_IA32_SYSENTER_ESP, &msr_data); c->regs[VCPU_REGS_RSP] = msr_data; - return 0; + return X86EMUL_CONTINUE; } static int @@ -1711,7 +1711,7 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt) if (ctxt->mode == X86EMUL_MODE_REAL || ctxt->mode == X86EMUL_MODE_VM86) { kvm_inject_gp(ctxt->vcpu, 0); - return -1; + return X86EMUL_UNHANDLEABLE; } setup_syscalls_segments(ctxt, &cs, &ss); @@ -1729,7 +1729,7 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt) cs.selector = (u16)(msr_data + 16); if ((msr_data & 0xfffc) == 0x0) { kvm_inject_gp(ctxt->vcpu, 0); - return -1; + return X86EMUL_PROPAGATE_FAULT; } ss.selector = (u16)(msr_data + 24); break; @@ -1737,7 +1737,7 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt) cs.selector = (u16)(msr_data + 32); if (msr_data == 0x0) { kvm_inject_gp(ctxt->vcpu, 0); - return -1; + return X86EMUL_PROPAGATE_FAULT; } ss.selector = cs.selector + 8; cs.db = 0; @@ -1753,7 +1753,7 @@ emulate_sysexit(struct x86_emulate_ctxt *ctxt) c->eip = ctxt->vcpu->arch.regs[VCPU_REGS_RDX]; c->regs[VCPU_REGS_RSP] = ctxt->vcpu->arch.regs[VCPU_REGS_RCX]; - return 0; + return X86EMUL_CONTINUE; } static bool emulator_bad_iopl(struct x86_emulate_ctxt *ctxt) @@ -2476,8 +2476,9 @@ twobyte_insn: } break; case 0x05: /* syscall */ - if (emulate_syscall(ctxt) == -1) - goto cannot_emulate; + rc = emulate_syscall(ctxt); + if (rc != X86EMUL_CONTINUE) + goto done; else goto writeback; break; @@ -2548,14 +2549,16 @@ twobyte_insn: c->dst.type = OP_NONE; break; case 0x34: /* sysenter */ - if (emulate_sysenter(ctxt) == -1) - goto cannot_emulate; + rc = emulate_sysenter(ctxt); + if (rc != X86EMUL_CONTINUE) + goto done; else goto writeback; break; case 0x35: /* sysexit */ - if (emulate_sysexit(ctxt) == -1) - goto cannot_emulate; + rc = emulate_sysexit(ctxt); + if (rc != X86EMUL_CONTINUE) + goto done; else goto writeback; break; |