AuxXxilium/linux_dsm_epyc7002
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f4cfcd2d5a
linux_dsm_epyc7002/arch/x86/kvm
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Maxim Levitsky f4cfcd2d5a KVM: x86: don't expose MSR_IA32_UMWAIT_CONTROL unconditionally 
This msr is only available when the host supports WAITPKG feature.

This breaks a nested guest, if the L1 hypervisor is set to ignore
unknown msrs, because the only other safety check that the
kernel does is that it attempts to read the msr and
rejects it if it gets an exception.

Cc: stable@vger.kernel.org
Fixes: 6e3ba4abce ("KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL")
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200523161455.3940-3-mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-05-27 13:08:19 -04:00
..
mmu KVM: x86/mmu: Set mmio_value to '0' if reserved #PF can't be generated 2020-05-27 13:06:45 -04:00
svm KVM: x86, SVM: isolate vcpu->arch.dr6 from vmcb->save.dr6 2020-05-08 07:44:31 -04:00
vmx KVM: VMX: enable X86_FEATURE_WAITPKG in KVM capabilities 2020-05-27 13:08:03 -04:00
cpuid.c KVM: x86: Fix BUILD_BUG() in __cpuid_entry_get_reg() w/ CONFIG_UBSAN=y 2020-03-31 10:51:45 -04:00
cpuid.h KVM: x86: Fix BUILD_BUG() in __cpuid_entry_get_reg() w/ CONFIG_UBSAN=y 2020-03-31 10:51:45 -04:00
debugfs.c KVM: no need to check return value of debugfs_create functions 2019-08-05 12:55:49 +02:00
emulate.c ARM: 2020-04-02 15:13:15 -07:00
hyperv.c KVM: Introduce kvm_make_all_cpus_request_except() 2020-05-08 07:44:32 -04:00
hyperv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
i8254.c KVM: x86: Fix print format and coding style 2020-03-16 17:57:08 +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 2020-01-27 19:59:37 +01:00
ioapic.c kvm: ioapic: Restrict lazy EOI update to edge-triggered interrupts 2020-05-04 12:29:05 -04:00
ioapic.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
irq_comm.c KVM: x86: don't notify userspace IOAPIC on edge-triggered interrupt EOI 2020-02-21 18:04:57 +01:00
irq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320 2019-06-05 17:37:05 +02:00
irq.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
Kconfig vhost: refine vhost and vringh kconfig 2020-04-01 12:06:26 -04:00
kvm_cache_regs.h KVM: x86: Copy kvm_x86_ops by value to eliminate layer of indirection 2020-03-31 10:48:08 -04:00
kvm_emulate.h ARM: 2020-04-02 15:13:15 -07:00
lapic.c KVM: X86: Filter out the broadcast dest for IPI fastpath 2020-04-07 08:34:16 -04:00
lapic.h KVM: X86: Filter out the broadcast dest for IPI fastpath 2020-04-07 08:34:16 -04:00
Makefile kvm: Disable objtool frame pointer checking for vmenter.S 2020-04-20 17:11:19 -04:00
mmu_audit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
mmu.h KVM: x86: Copy kvm_x86_ops by value to eliminate layer of indirection 2020-03-31 10:48:08 -04:00
mmutrace.h KVM: x86: fix incorrect comparison in trace event 2020-02-20 18:13:44 +01:00
mtrr.c KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks 2020-01-27 19:59:39 +01:00
pmu.c KVM: x86: Copy kvm_x86_ops by value to eliminate layer of indirection 2020-03-31 10:48:08 -04:00
pmu.h KVM: x86: Copy kvm_x86_ops by value to eliminate layer of indirection 2020-03-31 10:48:08 -04:00
trace.h ARM: 2020-04-02 15:13:15 -07:00
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: don't expose MSR_IA32_UMWAIT_CONTROL unconditionally 2020-05-27 13:08:19 -04:00
x86.h KVM: x86: Copy kvm_x86_ops by value to eliminate layer of indirection 2020-03-31 10:48:08 -04:00