[PATCH 4.9 86/96] x86/spectre: Add boot time option to select Spectre v2 mitigation

4.9-stable review patch. If anyone has any objections, please let me know. -- From: David Woodhouse commit da285121560e769cc31797bba6422eea71d473e0 upstream. Add a spectre_v2= option to select the mitigation used for the indirect branch speculation

[PATCH 4.9 86/96] x86/spectre: Add boot time option to select Spectre v2 mitigation

4.9-stable review patch. If anyone has any objections, please let me know. -- From: David Woodhouse commit da285121560e769cc31797bba6422eea71d473e0 upstream. Add a spectre_v2= option to select the mitigation used for the indirect branch speculation vulnerability. Currently,