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
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vmx	KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits	2021-01-06 14:48:36 +01:00
Kconfig	kvm: x86: add host poll control msrs	2019-06-18 11:43:46 +02:00
Makefile	KVM: x86: fix TRACE_INCLUDE_PATH and remove -I. header search paths	2019-01-25 19:12:37 +01:00
cpuid.c	kvm/svm: PKU not currently supported	2020-02-11 04:35:40 -08:00
cpuid.h	KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits	2021-01-06 14:48:36 +01:00
debugfs.c	KVM: no need to check return value of debugfs_create functions	2019-08-05 12:55:49 +02:00
emulate.c	KVM: x86: clflushopt should be treated as a no-op by emulation	2020-11-22 10:14:12 +01:00
hyperv.c	KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() from Spectre-v1/L1TF attacks	2020-02-11 04:35:38 -08:00
hyperv.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499	2019-06-19 17:09:53 +02:00
i8254.c	kvm: x86: Add memcg accounting to KVM allocations	2019-02-20 22:48:30 +01:00
i8254.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
i8259.c	KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks	2020-02-11 04:35:37 -08:00
ioapic.c	KVM: x86: Protect ioapic_read_indirect() from Spectre-v1/L1TF attacks	2020-02-11 04:35:38 -08:00
ioapic.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
irq.c	KVM: x86: Fix split-irqchip vs interrupt injection window request	2020-12-02 08:49:46 +01:00
irq.h	KVM/arm updates for 5.3	2019-07-11 15:14:16 +02:00
irq_comm.c	KVM: x86: don't notify userspace IOAPIC on edge-triggered interrupt EOI	2020-02-28 17:22:22 +01:00
kvm_cache_regs.h	KVM: x86: Mark CR4.TSD as being possibly owned by the guest	2020-07-16 08:16:44 +02:00
lapic.c	KVM: x86: handle !lapic_in_kernel case in kvm_cpu_*_extint	2020-12-02 08:49:46 +01:00
lapic.h	KVM: SVM: Fix potential wrong physical id in avic_handle_ldr_update	2019-10-22 18:47:50 +02:00
mmu.c	KVM: mmu: Fix SPTE encoding of MMIO generation upper half	2020-12-21 13:27:06 +01:00
mmu.h	KVM: nVMX: Plumb L2 GPA through to PML emulation	2020-06-30 15:37:07 -04:00
mmu_audit.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499	2019-06-19 17:09:53 +02:00
mmutrace.h	KVM: x86: fix incorrect comparison in trace event	2020-10-01 13:17:35 +02:00
mtrr.c	KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks	2020-02-11 04:35:39 -08:00
page_track.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499	2019-06-19 17:09:53 +02:00
paging_tmpl.h	KVM: nVMX: Plumb L2 GPA through to PML emulation	2020-06-30 15:37:07 -04:00
pmu.c	KVM: x86: Add fixed counters to PMU filter	2019-07-20 09:00:48 +02:00
pmu.h	KVM: x86: Protect MSR-based index computations in pmu.h from Spectre-v1/L1TF attacks	2020-02-11 04:35:38 -08:00
pmu_amd.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499	2019-06-19 17:09:53 +02:00
svm.c	KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits	2021-01-06 14:48:36 +01:00
trace.h	KVM: nVMX: trace nested VM-Enter failures detected by H/W	2019-09-11 17:34:17 +02:00
tss.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
x86.c	KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL	2021-01-06 14:48:36 +01:00
x86.h	KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL	2021-01-06 14:48:36 +01:00