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d8f0e0b073
Add support for disabling the kernel implemented spectre v2 mitigation (count cache flush on context switch) via the nospectre_v2 and mitigations=off cmdline options. Suggested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Christopher M. Riedl <cmr@informatik.wtf> Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190524024647.381-1-cmr@informatik.wtf