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 950670ac1f)
Change-Id: I8472e7fc4fbf5b3e01b56b79eba7feda315d29cf
0c13c06b02