Most of the v1 mitigation is baked into the kernel and not
optional. The swapgs barriers are, however, optional.
They have a negative performance impact so we disable them
by using the nospectre_v1 kernel bootarg.
Partial-Bug: 1860193
Depends-On: https://review.opendev.org/#/c/705300
Signed-off-by: Jim Somerville <Jim.Somerville@windriver.com>
(cherry picked from commit 91f488af02)
Change-Id: I88c8fafe558c5f03a9d0af7c42a668decef18f5a
2a7cb246a1