Gleb Natapov wrote:
The patch fixes two problems with task switching. 1. Back link is written to a wrong TSS. 2. Instruction emulation is not needed if the reason for task switch is a task gate in IDT and access to it is caused by an external even. 2 is currently solved only for VMX since there is not reliable way to skip an instruction in SVM. We should emulate it instead.
Looks good, but please split into (at least) two patches. Also please provide a test case so we don't regress again.
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