diff options
| -rw-r--r-- | arch/x86/kvm/emulate.c | 4 | ||||
| -rw-r--r-- | arch/x86/kvm/kvm_emulate.h | 10 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 9 |
3 files changed, 21 insertions, 2 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 77161f57c8d3..70a8e0cd9fdc 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -247,7 +247,7 @@ enum x86_transfer_type { static ulong reg_read(struct x86_emulate_ctxt *ctxt, unsigned nr) { - if (WARN_ON_ONCE(nr >= NR_EMULATOR_GPRS)) + if (KVM_EMULATOR_BUG_ON(nr >= NR_EMULATOR_GPRS, ctxt)) nr &= NR_EMULATOR_GPRS - 1; if (!(ctxt->regs_valid & (1 << nr))) { @@ -259,7 +259,7 @@ static ulong reg_read(struct x86_emulate_ctxt *ctxt, unsigned nr) static ulong *reg_write(struct x86_emulate_ctxt *ctxt, unsigned nr) { - if (WARN_ON_ONCE(nr >= NR_EMULATOR_GPRS)) + if (KVM_EMULATOR_BUG_ON(nr >= NR_EMULATOR_GPRS, ctxt)) nr &= NR_EMULATOR_GPRS - 1; BUILD_BUG_ON(sizeof(ctxt->regs_dirty) * BITS_PER_BYTE < NR_EMULATOR_GPRS); diff --git a/arch/x86/kvm/kvm_emulate.h b/arch/x86/kvm/kvm_emulate.h index 034c845b3c63..89246446d6aa 100644 --- a/arch/x86/kvm/kvm_emulate.h +++ b/arch/x86/kvm/kvm_emulate.h @@ -89,6 +89,7 @@ struct x86_instruction_info { #define X86EMUL_INTERCEPTED 6 /* Intercepted by nested VMCB/VMCS */ struct x86_emulate_ops { + void (*vm_bugged)(struct x86_emulate_ctxt *ctxt); /* * read_gpr: read a general purpose register (rax - r15) * @@ -383,6 +384,15 @@ struct x86_emulate_ctxt { bool is_branch; }; +#define KVM_EMULATOR_BUG_ON(cond, ctxt) \ +({ \ + int __ret = (cond); \ + \ + if (WARN_ON_ONCE(__ret)) \ + ctxt->ops->vm_bugged(ctxt); \ + unlikely(__ret); \ +}) + /* Repeat String Operation Prefix */ #define REPE_PREFIX 0xf3 #define REPNE_PREFIX 0xf2 diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e8177d8b378e..a0baf49bb00d 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7915,7 +7915,16 @@ static int emulator_set_xcr(struct x86_emulate_ctxt *ctxt, u32 index, u64 xcr) return __kvm_set_xcr(emul_to_vcpu(ctxt), index, xcr); } +static void emulator_vm_bugged(struct x86_emulate_ctxt *ctxt) +{ + struct kvm *kvm = emul_to_vcpu(ctxt)->kvm; + + if (!kvm->vm_bugged) + kvm_vm_bugged(kvm); +} + static const struct x86_emulate_ops emulate_ops = { + .vm_bugged = emulator_vm_bugged, .read_gpr = emulator_read_gpr, .write_gpr = emulator_write_gpr, .read_std = emulator_read_std, |