Revision b5861e5cf2fcf83031ea3e26b0a69d887adf7d21 authored by Liran Alon on 03 September 2018, 12:20:22 UTC, committed by Radim Krčmář on 07 September 2018, 16:38:42 UTC
Consider the case L1 had a IRQ/NMI event until it executed VMLAUNCH/VMRESUME which wasn't delivered because it was disallowed (e.g. interrupts disabled). When L1 executes VMLAUNCH/VMRESUME, L0 needs to evaluate if this pending event should cause an exit from L2 to L1 or delivered directly to L2 (e.g. In case L1 don't intercept EXTERNAL_INTERRUPT). Usually this would be handled by L0 requesting a IRQ/NMI window by setting VMCS accordingly. However, this setting was done on VMCS01 and now VMCS02 is active instead. Thus, when L1 executes VMLAUNCH/VMRESUME we force L0 to perform pending event evaluation by requesting a KVM_REQ_EVENT. Note that above scenario exists when L1 KVM is about to enter L2 but requests an "immediate-exit". As in this case, L1 will disable-interrupts and then send a self-IPI before entering L2. Reviewed-by: Nikita Leshchenko <nikita.leshchenko@oracle.com> Co-developed-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Liran Alon <liran.alon@oracle.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
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| 1.Intro.rst | -rw-r--r-- | 14.3 KB |
| 2.Process.rst | -rw-r--r-- | 23.6 KB |
| 3.Early-stage.rst | -rw-r--r-- | 10.7 KB |
| 4.Coding.rst | -rw-r--r-- | 21.3 KB |
| 5.Posting.rst | -rw-r--r-- | 15.6 KB |
| 6.Followthrough.rst | -rw-r--r-- | 11.8 KB |
| 7.AdvancedTopics.rst | -rw-r--r-- | 9.5 KB |
| 8.Conclusion.rst | -rw-r--r-- | 3.1 KB |
| adding-syscalls.rst | -rw-r--r-- | 26.2 KB |
| applying-patches.rst | -rw-r--r-- | 16.9 KB |
| changes.rst | -rw-r--r-- | 12.5 KB |
| clang-format.rst | -rw-r--r-- | 6.4 KB |
| code-of-conflict.rst | -rw-r--r-- | 1.4 KB |
| coding-style.rst | -rw-r--r-- | 36.1 KB |
| conf.py | -rw-r--r-- | 260 bytes |
| development-process.rst | -rw-r--r-- | 810 bytes |
| email-clients.rst | -rw-r--r-- | 10.8 KB |
| howto.rst | -rw-r--r-- | 26.9 KB |
| index.rst | -rw-r--r-- | 1.3 KB |
| kernel-docs.rst | -rw-r--r-- | 24.2 KB |
| kernel-driver-statement.rst | -rw-r--r-- | 4.1 KB |
| kernel-enforcement-statement.rst | -rw-r--r-- | 4.9 KB |
| license-rules.rst | -rw-r--r-- | 13.7 KB |
| magic-number.rst | -rw-r--r-- | 10.2 KB |
| maintainer-pgp-guide.rst | -rw-r--r-- | 37.1 KB |
| management-style.rst | -rw-r--r-- | 13.1 KB |
| stable-api-nonsense.rst | -rw-r--r-- | 9.3 KB |
| stable-kernel-rules.rst | -rw-r--r-- | 6.6 KB |
| submit-checklist.rst | -rw-r--r-- | 4.9 KB |
| submitting-drivers.rst | -rw-r--r-- | 6.6 KB |
| submitting-patches.rst | -rw-r--r-- | 36.8 KB |
| volatile-considered-harmful.rst | -rw-r--r-- | 5.6 KB |
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