I just realized that from my previous comment I said:
(2)
There is *no current request* to allow following features to be
reported by EAX_7H_ECX_0_EDX QEMU/KVM right now:
* CPUID.(EAX=7H,ECX=0):EDX[27] STIBP support flag.
* CPUID.(EAX=7H,ECX=0):EDX[28] L1D_FLUSH support flag.
* CPUID.(EAX=7H,ECX=0):EDX[31] SSBD support flag.
I just realized that from my previous comment I said:
(2)
There is *no current request* to allow following features to be
reported by EAX_7H_ECX_0_EDX QEMU/KVM right now:
* CPUID.( EAX=7H, ECX=0): EDX[27] STIBP support flag. EAX=7H, ECX=0): EDX[28] L1D_FLUSH support flag. EAX=7H, ECX=0): EDX[31] SSBD support flag.
* CPUID.(
* CPUID.(
But the other bug:
https:/ /bugs.launchpad .net/intel/ +bug/1830821
Is about enabling SSBD support:
CPUID.( EAX=7H, ECX=0): EDX[29] (IA32_ARCH_ CAPABILITIES feature flag)
...
- (bit 4) SSB_NO: processor not susceptible to spec store bypass
and to enable guest to opt out from SSB (speculative store bypass)