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| author | Paolo Bonzini <pbonzini@redhat.com> | 2014-09-02 15:18:37 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-09-03 12:18:54 +0400 |
| commit | 5e352519519623a0b62587c606280e534d0cf1d9 (patch) | |
| tree | 776ecf76c11f6092c28d2125e7e79cd49a937f9b /arch/x86/kvm/paging_tmpl.h | |
| parent | a0c0feb57992c5caed170feab8a68c51306eb7c3 (diff) | |
| download | linux-5e352519519623a0b62587c606280e534d0cf1d9.tar.xz | |
KVM: nSVM: propagate the NPF EXITINFO to the guest
This is similar to what the EPT code does with the exit qualification.
This allows the guest to see a valid value for bits 33:32.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/paging_tmpl.h')
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 410776528265..df1a044d92de 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -322,8 +322,20 @@ retry_walk: real_gfn = mmu->translate_gpa(vcpu, gfn_to_gpa(table_gfn), PFERR_USER_MASK|PFERR_WRITE_MASK); + + /* + * FIXME: This can happen if emulation (for of an INS/OUTS + * instruction) triggers a nested page fault. The exit + * qualification / exit info field will incorrectly have + * "guest page access" as the nested page fault's cause, + * instead of "guest page structure access". To fix this, + * the x86_exception struct should be augmented with enough + * information to fix the exit_qualification or exit_info_1 + * fields. + */ if (unlikely(real_gfn == UNMAPPED_GVA)) goto error; + real_gfn = gpa_to_gfn(real_gfn); host_addr = gfn_to_hva_prot(vcpu->kvm, real_gfn, |