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475062aca9
AMD future CPUs expose a mechanism to tell the guest that the Speculative Store Bypass Disable is not needed and that the CPU is all good. This is exposed via the CPUID 8000_0008.EBX[26] bit. See 124441_AMD64_SpeculativeStoreBypassDisable_Whitepaper_final.pdf A copy of this document is available at https://bugzilla.kernel.org/show_bug.cgi?id=199889 Backports commit 254790a909a2f153d689bfa7d8e8f0386cda870d from qemu |
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