FAILED: patch "[PATCH] KVM: VMX: Mark all PERF_GLOBAL_(OVF)_CTRL bits reserved if" failed to apply to 4.19-stable tree

The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 93255bf92939d948bc86d81c6bb70bb0fecc5db1 Mon Sep 17 00:00:00 2001
From: Sean Christopherson <[email protected]>
Date: Fri, 22 Jul 2022 22:44:06 +0000
Subject: [PATCH] KVM: VMX: Mark all PERF_GLOBAL_(OVF)_CTRL bits reserved if
there's no vPMU

Mark all MSR_CORE_PERF_GLOBAL_CTRL and MSR_CORE_PERF_GLOBAL_OVF_CTRL bits as reserved if there is no guest vPMU. The nVMX VM-Entry consistency checks do not check for a valid vPMU prior to consuming the masks via kvm_valid_perf_global_ctrl(), i.e. may incorrectly allow a non-zero mask to be loaded via VM-Enter or VM-Exit (well, attempted to be loaded, the actual MSR load will be rejected by intel_is_valid_msr()).

Message-Id: <[email protected]>

index 4bc098fbec31..6e355c5d2f40 100644
@@ -527,6 +527,8 @@ static void intel_pmu_refresh(struct kvm_vcpu *vcpu)
 	pmu->version = 0;
 	pmu->reserved_bits = 0xffffffff00200000ull;
 	pmu->raw_event_mask = X86_RAW_EVENT_MASK;
+	pmu->global_ctrl_mask = ~0ull;
+	pmu->global_ovf_ctrl_mask = ~0ull;
 	pmu->fixed_ctr_ctrl_mask = ~0ull;
 	pmu->pebs_enable_mask = ~0ull;
 	pmu->pebs_data_cfg_mask = ~0ull;