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| author | Avi Kivity <avi@redhat.com> | 2009-06-11 15:43:28 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 08:32:52 +0300 |
| commit | 3f5d18a96577fd78277e08c467041573b9a65eaf (patch) | |
| tree | 5c9e15a3b48d188729bb77283cf353fd42903155 | |
| parent | 988a2cae6a3c0dea6df59808a935a9a697bfc28c (diff) | |
| download | talos-obmc-linux-3f5d18a96577fd78277e08c467041573b9a65eaf.tar.gz talos-obmc-linux-3f5d18a96577fd78277e08c467041573b9a65eaf.zip | |
KVM: Return to userspace on emulation failure
Instead of mindlessly retrying to execute the instruction, report the
failure to userspace.
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/mmu.c | 5 | ||||
| -rw-r--r-- | include/linux/kvm.h | 7 |
2 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 5f97dbd24291..b6e4cda77047 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2673,8 +2673,9 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u32 error_code) ++vcpu->stat.mmio_exits; return 0; case EMULATE_FAIL: - kvm_report_emulation_failure(vcpu, "pagetable"); - return 1; + vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; + return 0; default: BUG(); } diff --git a/include/linux/kvm.h b/include/linux/kvm.h index 5037e170a70d..671051829da6 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -95,6 +95,10 @@ struct kvm_pit_config { #define KVM_EXIT_S390_RESET 14 #define KVM_EXIT_DCR 15 #define KVM_EXIT_NMI 16 +#define KVM_EXIT_INTERNAL_ERROR 17 + +/* For KVM_EXIT_INTERNAL_ERROR */ +#define KVM_INTERNAL_ERROR_EMULATION 1 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */ struct kvm_run { @@ -181,6 +185,9 @@ struct kvm_run { __u32 data; __u8 is_write; } dcr; + struct { + __u32 suberror; + } internal; /* Fix the size of the union. */ char padding[256]; }; |
