On Mon, Dec 21, 2020 at 1:23 PM Arvind Sankar <[email protected]> wrote: > > On Mon, Dec 21, 2020 at 11:14:39AM -0800, Nick Desaulniers wrote: > > On Wed, Sep 2, 2020 at 7:31 PM Arvind Sankar <[email protected]> wrote: > > > > > > When CONFIG_RETPOLINE is disabled, Clang uses a jump table for the > > > switch statement in cmdline_find_option (jump tables are disabled when > > > CONFIG_RETPOLINE is enabled). This function is called very early in boot > > > from sme_enable() if CONFIG_AMD_MEM_ENCRYPT is enabled. At this time, > > > > Hi Arvind, sorry I missed this when you first sent it. I'm going > > through and mass deleting my inbox (email bankruptcy) but noticed > > this. I couldn't reproduce jump tables in cmdline_find_option with > > CONFIG_RETPOLINE disabled but CONFIG_AMD_MEM_ENCRYPT on today's > > linux-next. Can you please confirm that this is still an issue? I will > > reread the disassembly, but it looks like a bunch of cmp/test+jumps. > > > > The patch got merged and is in v5.10 -- are you testing with it reverted > or just plain linux-next?
Oh, sorry, I missed any email that it was merged (and didn't look in git log). Just linux-next, so no wonder I didn't see any jump tables. :^P -- Thanks, ~Nick Desaulniers
