Paolo Bonzini 7cb6087b45 KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits ... [ Upstream commit 39485ed95d ] Until commit e7c587da12 ("x86/speculation: Use synthetic bits for IBRS/IBPB/STIBP"), KVM was testing both Intel and AMD CPUID bits before allowing the guest to write MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD. Testing only Intel bits on VMX processors, or only AMD bits on SVM processors, fails if the guests are created with the "opposite" vendor as the host. While at it, also tweak the host CPU check to use the vendor-agnostic feature bit X86_FEATURE_IBPB, since we only care about the availability of the MSR on the host here and not about specific CPUID bits. Fixes: e7c587da12 ("x86/speculation: Use synthetic bits for IBRS/IBPB/STIBP") Cc: stable@vger.kernel.org Reported-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-01-06 14:48:36 +01:00
..
capabilities.h	KVM: nVMX: clear PIN_BASED_POSTED_INTR from nested pinbased_ctls only when apicv is globally disabled	2020-02-28 17:22:23 +01:00
evmcs.c	x86/kvm/nVMX: fix VMCLEAR when Enlightened VMCS is in use	2019-07-02 18:56:00 +02:00
evmcs.h	KVM/Hyper-V/VMX: Add direct tlb flush support	2019-09-24 13:37:14 +02:00
nested.c	KVM: nVMX: Reload vmcs01 if getting vmcs12's pages fails	2020-10-29 09:57:28 +01:00
nested.h	KVM: nVMX: clear PIN_BASED_POSTED_INTR from nested pinbased_ctls only when apicv is globally disabled	2020-02-28 17:22:23 +01:00
ops.h	x86/kvm: fix a missing-prototypes "vmread_error"	2020-05-10 10:31:31 +02:00
pmu_intel.c	KVM: x86: Protect pmu_intel.c from Spectre-v1/L1TF attacks	2020-02-11 04:35:37 -08:00
vmcs.h	KVM: VMX: Leave preemption timer running when it's disabled	2019-06-18 17:10:46 +02:00
vmcs12.c	KVM: nVMX: Move vmcs12 code to dedicated files	2018-12-14 12:34:30 +01:00
vmcs12.h	KVM/arm updates for 5.3	2019-07-11 15:14:16 +02:00
vmcs_shadow_fields.h	KVM: nVMX: shadow pin based execution controls	2019-06-18 17:10:50 +02:00
vmenter.S	KVM: VMX: Explicitly clear RFLAGS.CF and RFLAGS.ZF in VM-Exit RSB path	2020-05-14 07:58:25 +02:00
vmx.c	KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits	2021-01-06 14:48:36 +01:00
vmx.h	KVM: VMX: Stop context switching MSR_IA32_UMWAIT_CONTROL	2020-06-30 15:37:07 -04:00