From: Sean Christopherson seanjc@google.com
stable inclusion from stable-v5.10.89 commit 8008fc1d0be1c381aa8077dfab2d980188611ae2 bugzilla: 186140 https://gitee.com/openeuler/kernel/issues/I4S8HA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 0ff29701ffad9a5d5a24344d8b09f3af7b96ffda upstream.
Update the documentation for kvm-intel's emulate_invalid_guest_state to rectify the description of KVM's default behavior, and to document that the behavior and thus parameter only applies to L1.
Fixes: a27685c33acc ("KVM: VMX: Emulate invalid guest state by default") Signed-off-by: Sean Christopherson seanjc@google.com Message-Id: 20211207193006.120997-4-seanjc@google.com Reviewed-by: Maxim Levitsky mlevitsk@redhat.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- Documentation/admin-guide/kernel-parameters.txt | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 4b38e33741e4..8d2834045d40 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2382,8 +2382,12 @@ Default is 1 (enabled)
kvm-intel.emulate_invalid_guest_state= - [KVM,Intel] Enable emulation of invalid guest states - Default is 0 (disabled) + [KVM,Intel] Disable emulation of invalid guest state. + Ignored if kvm-intel.enable_unrestricted_guest=1, as + guest state is never invalid for unrestricted guests. + This param doesn't apply to nested guests (L2), as KVM + never emulates invalid L2 guest state. + Default is 1 (enabled)
kvm-intel.flexpriority= [KVM,Intel] Disable FlexPriority feature (TPR shadow).