Peter Zijlstra 089dd8e531 x86/speculation: Change FILL_RETURN_BUFFER to work with objtool ... Change FILL_RETURN_BUFFER so that objtool groks it and can generate correct ORC unwind information. - Since ORC is alternative invariant; that is, all alternatives should have the same ORC entries, the __FILL_RETURN_BUFFER body can not be part of an alternative. Therefore, move it out of the alternative and keep the alternative as a sort of jump_label around it. - Use the ANNOTATE_INTRA_FUNCTION_CALL annotation to white-list these 'funny' call instructions to nowhere. - Use UNWIND_HINT_EMPTY to 'fill' the speculation traps, otherwise objtool will consider them unreachable. - Move the RSP adjustment into the loop, such that the loop has a deterministic stack layout. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lkml.kernel.org/r/20200428191700.032079304@infradead.org		2020-04-30 20:14:34 +02:00
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asm	x86/speculation: Change FILL_RETURN_BUFFER to work with objtool	2020-04-30 20:14:34 +02:00
uapi/asm	KVM: nVMX: Emulate MTF when performing instruction emulation	2020-02-23 09:36:23 +01:00