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| author |   Sean Christopherson <seanjc@google.com> | 2021-12-07 22:09:25 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-02-10 13:50:35 -0500 |
| commit | 40421f38f63764cd41b01c17e2a1fbbe08a1515a (patch) | |
| tree | f3e726699c8a335d1a4d4702169c2bb70d7fc528 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | KVM: x86: Shove vp_bitmap handling down into sparse_set_to_vcpu_mask() (diff) | |
KVM: x86: Reject fixeds-size Hyper-V hypercalls with non-zero "var_cnt"
Reject Hyper-V hypercalls if the guest specifies a non-zero variable size
header (var_cnt in KVM) for a hypercall that has a fixed header size.
Per the TLFS:
It is illegal to specify a non-zero variable header size for a
hypercall that is not explicitly documented as accepting variable sized
input headers. In such a case the hypercall will result in a return
code of HV_STATUS_INVALID_HYPERCALL_INPUT.
Note, at least some of the various DEBUG commands likely aren't allowed
to use variable size headers, but the TLFS documentation doesn't clearly
state what is/isn't allowed. Omit them for now to avoid unnecessary
breakage.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20211207220926.718794-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions