AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/x86/kvm/vmx
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Liran Alon e64a850823 KVM: VMX: Consume pending LAPIC INIT event when exit on INIT_SIGNAL 
Intel SDM section 25.2 OTHER CAUSES OF VM EXITS specifies the following
on INIT signals: "Such exits do not modify register state or clear pending
events as they would outside of VMX operation."

When commit 4b9852f4f3 ("KVM: x86: Fix INIT signal handling in various CPU states")
was applied, I interepted above Intel SDM statement such that
INIT_SIGNAL exit don’t consume the LAPIC INIT pending event.

However, when Nadav Amit run matching kvm-unit-test on a bare-metal
machine, it turned out my interpetation was wrong. i.e. INIT_SIGNAL
exit does consume the LAPIC INIT pending event.
(See: https://www.spinics.net/lists/kvm/msg196757.html)

Therefore, fix KVM code to behave as observed on bare-metal.

Fixes: 4b9852f4f3 ("KVM: x86: Fix INIT signal handling in various CPU states")
Reported-by: Nadav Amit <nadav.amit@gmail.com>
Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-11-15 11:44:01 +01:00
..
capabilities.h KVM: x86: Add support for user wait instructions 2019-09-24 14:34:20 +02:00
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: VMX: Consume pending LAPIC INIT event when exit on INIT_SIGNAL 2019-11-15 11:44:01 +01:00
nested.h KVM: VMX: Rename {vmx,nested_vmx}_vcpu_setup() 2019-10-22 13:46:39 +02:00
ops.h KVM: VMX: Add error handling to VMREAD helper 2019-09-25 15:30:09 +02:00
pmu_intel.c kvm: vmx: Limit guest PMCs to those supported on the host 2019-10-01 15:15:06 +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
vmcs.h KVM: VMX: Leave preemption timer running when it's disabled 2019-06-18 17:10:46 +02:00
vmenter.S KVM: VMX: Fix and tweak the comments for VM-Enter 2019-08-22 10:09:27 +02:00
vmx.c KVM: retpolines: x86: eliminate retpoline from vmx.c exit handlers 2019-11-15 11:43:56 +01:00
vmx.h KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL 2019-09-24 14:34:36 +02:00