Paolo Bonzini 3d4a058945 KVM: SVM: relax conditions for allowing MSR_IA32_SPEC_CTRL accesses ... [ Upstream commit df7e881892 ] Userspace that does not know about the AMD_IBRS bit might still allow the guest to protect itself with MSR_IA32_SPEC_CTRL using the Intel SPEC_CTRL bit. However, svm.c disallows this and will cause a #GP in the guest when writing to the MSR. Fix this by loosening the test and allowing the Intel CPUID bit, and in fact allow the AMD_STIBP bit as well since it allows writing to MSR_IA32_SPEC_CTRL too. Reported-by: Zhiyi Guo <zhguo@redhat.com> Analyzed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Analyzed-by: Laszlo Ersek <lersek@redhat.com> 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: avoid incorrect writes to host MSR_IA32_SPEC_CTRL	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	x86/cpufeatures: Combine word 11 and 12 into a new scattered features word	2019-06-20 12:38:44 +02:00
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: SVM: relax conditions for allowing MSR_IA32_SPEC_CTRL accesses	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