Fenghua Yu 6e3133d901 tools/objtool: Check for use of the ENQCMD instruction in the kernel ... The ENQCMD instruction implicitly accesses the PASID_MSR to fill in the pasid field of the descriptor being submitted to an accelerator. But there is no precise (and stable across kernel changes) point at which the PASID_MSR is updated from the value for one task to the next. Kernel code that uses accelerators must always use the ENQCMDS instruction which does not access the PASID_MSR. Check for use of the ENQCMD instruction in the kernel and warn on its usage. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Link: https://lore.kernel.org/r/20220207230254.3342514-11-fenghua.yu@intel.com		2022-02-15 11:31:43 +01:00
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include/arch	objtool: Decode jump_entry::key addend	2021-05-12 14:54:55 +02:00
Build	objtool: Abstract alternative special case handling	2020-09-10 10:43:13 -05:00
decode.c	tools/objtool: Check for use of the ENQCMD instruction in the kernel	2022-02-15 11:31:43 +01:00
special.c	objtool: Fix retpoline detection in asm code	2021-01-26 11:11:59 -06:00