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27 March 2024, 02:37:15 UTC
Revision 892a42c10ddb945d3a4dcf07dccdf9cb98b21548 authored by Vitaly Kuznetsov on 12 January 2022, 17:01:33 UTC, committed by Paolo Bonzini on 28 January 2022, 12:38:26 UTC 
KVM: nVMX: Implement evmcs_field_offset() suitable for handle_vmread()
 
In preparation to allowing reads from Enlightened VMCS from
handle_vmread(), implement evmcs_field_offset() to get the correct
read offset. get_evmcs_offset(), which is being used by KVM-on-Hyper-V,
is almost what's needed but a few things need to be adjusted. First,
WARN_ON() is unacceptable for handle_vmread() as any field can (in
theory) be supplied by the guest and not all fields are defined in
eVMCS v1. Second, we need to handle 'holes' in eVMCS (missing fields).
It also sounds like a good idea to WARN_ON() if such fields are ever
accessed by KVM-on-Hyper-V.

Implement dedicated evmcs_field_offset() helper.

No functional change intended.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220112170134.1904308-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 2423a4c
History
Tip revision: 892a42c10ddb945d3a4dcf07dccdf9cb98b21548 authored by Vitaly Kuznetsov on 12 January 2022, 17:01:33 UTC
KVM: nVMX: Implement evmcs_field_offset() suitable for handle_vmread()
Tip revision: 892a42c
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