[PATCH 18/22] KVM: X86: Propagate fetch faults
in [Kernel]
|
Prev: [PATCH 11/22] KVM: MMU: Add infrastructure for two-level page walker
Next: [PATCH 04/22] KVM: X86: Introduce a tdp_set_cr3 function
From: Joerg Roedel on 27 Apr 2010 06:50 KVM currently ignores fetch faults in the instruction emulator. With nested-npt we could have such faults. This patch adds the code to handle these. Signed-off-by: Joerg Roedel <joerg.roedel(a)amd.com> --- arch/x86/kvm/emulate.c | 2 +- arch/x86/kvm/x86.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 171e1c7..bb90307 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1260,7 +1260,7 @@ done_prefixes: } done: - return (rc == X86EMUL_UNHANDLEABLE) ? -1 : 0; + return rc; } static int pio_in_emulated(struct x86_emulate_ctxt *ctxt, diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 4d3a698..d159319 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3856,6 +3856,10 @@ int emulate_instruction(struct kvm_vcpu *vcpu, ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); + if (r == X86EMUL_PROPAGATE_FAULT) { + kvm_propagate_fault(vcpu); + return EMULATE_DONE; + } trace_kvm_emulate_insn_start(vcpu); /* Only allow emulation of specific instructions on #UD -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |