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>
1 parent 564ad0a
| File | Mode | Size |
|---|---|---|
| bridge | ||
| amdgpu.rst | -rw-r--r-- | 2.7 KB |
| conf.py | -rw-r--r-- | 219 bytes |
| drivers.rst | -rw-r--r-- | 278 bytes |
| drm-client.rst | -rw-r--r-- | 229 bytes |
| drm-internals.rst | -rw-r--r-- | 8.8 KB |
| drm-kms-helpers.rst | -rw-r--r-- | 8.1 KB |
| drm-kms.rst | -rw-r--r-- | 18.1 KB |
| drm-mm.rst | -rw-r--r-- | 20.6 KB |
| drm-uapi.rst | -rw-r--r-- | 12.7 KB |
| i915.rst | -rw-r--r-- | 17.8 KB |
| index.rst | -rw-r--r-- | 347 bytes |
| introduction.rst | -rw-r--r-- | 4.5 KB |
| kms-properties.csv | -rw-r--r-- | 7.6 KB |
| meson.rst | -rw-r--r-- | 1.8 KB |
| msm-crash-dump.rst | -rw-r--r-- | 2.4 KB |
| pl111.rst | -rw-r--r-- | 221 bytes |
| tegra.rst | -rw-r--r-- | 7.2 KB |
| tinydrm.rst | -rw-r--r-- | 926 bytes |
| todo.rst | -rw-r--r-- | 19.9 KB |
| tve200.rst | -rw-r--r-- | 204 bytes |
| v3d.rst | -rw-r--r-- | 759 bytes |
| vc4.rst | -rw-r--r-- | 2.1 KB |
| vga-switcheroo.rst | -rw-r--r-- | 1.9 KB |
| vgaarbiter.rst | -rw-r--r-- | 8.0 KB |
| xen-front.rst | -rw-r--r-- | 1010 bytes |
Computing file changes ...
