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(parent: d7caac9) | patch
x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n
authorJosh Poimboeuf <jpoimboe@kernel.org>
Tue, 14 Jun 2022 21:16:05 +0000 (23:16 +0200)
committerBorislav Petkov <bp@suse.de>
Mon, 27 Jun 2022 08:34:00 +0000 (10:34 +0200)
commitb2620facef4889fefcbf2e87284f34dcd4189bce
tree52439ac589efbe3e3c881eba84cddb489e205c37tree | snapshot
parentd7caac991feeef1b871ee6988fd2c9725df09039commit | diff
x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n

If a kernel is built with CONFIG_RETPOLINE=n, but the user still wants
to mitigate Spectre v2 using IBRS or eIBRS, the RSB filling will be
silently disabled.

There's nothing retpoline-specific about RSB buffer filling.  Remove the
CONFIG_RETPOLINE guards around it.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
arch/x86/entry/entry_32.S diff | blob | history
arch/x86/entry/entry_64.S diff | blob | history
arch/x86/include/asm/nospec-branch.h diff | blob | history
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