[v2,0/6] x86: some assembler macro rework

Message

Jan Beulich Sept. 28, 2020, 12:28 p.m. UTC

Parts of this were discussed in the context of Andrew's CET-SS work.
Further parts simply fit the underlying picture. And the two final
patches get attached here simply because of their dependency: Patch
4 was sent standalone already as v2, and is unchanged from that,
while patch 6 is new.

1: replace __ASM_{CL,ST}AC
2: reduce CET-SS related #ifdef-ary
3: drop ASM_{CL,ST}AC
4: fold indirect_thunk_asm.h into asm-defns.h
5: guard against straight-line speculation past RET
6: limit amount of INT3 in IND_THUNK_*

Jan

Comments

Jan Beulich Sept. 28, 2020, 12:34 p.m. UTC | #1

On 28.09.2020 14:28, Jan Beulich wrote:
> Parts of this were discussed in the context of Andrew's CET-SS work.
> Further parts simply fit the underlying picture. And the two final
> patches get attached here simply because of their dependency: Patch
> 4 was sent standalone already as v2, and is unchanged from that,
> while patch 6 is new.

And I should perhaps clarify: I'm resending the initial part of this
mainly to revive the discussion. There was some file name disagreement,
which is why I didn't commit at least the 2st patch here so far. But
there were no alternative suggestions that I would consider acceptable,
and hence I've kept the name as is.

Jan