Peter Zijlstra 1e19da8522 x86/speculation: Add eIBRS + Retpoline options ... Thanks to the chaps at VUsec it is now clear that eIBRS is not sufficient, therefore allow enabling of retpolines along with eIBRS. Add spectre_v2=eibrs, spectre_v2=eibrs,lfence and spectre_v2=eibrs,retpoline options to explicitly pick your preferred means of mitigation. Since there's new mitigations there's also user visible changes in /sys/devices/system/cpu/vulnerabilities/spectre_v2 to reflect these new mitigations. [ bp: Massage commit message, trim error messages, do more precise eIBRS mode checking. ] Co-developed-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Patrick Colp <patrick.colp@oracle.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>		2022-02-21 10:21:35 +01:00
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asm	x86/speculation: Add eIBRS + Retpoline options	2022-02-21 10:21:35 +01:00
uapi/asm	KVM: x86: add system attribute to retrieve full set of supported xsave states	2022-01-28 07:33:32 -05:00