FAILED: patch "[PATCH] KVM: x86: remove exit_int_info warning in svm_handle_exit" 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]>.

Possible dependencies:

05311ce954ae ("KVM: x86: remove exit_int_info warning in svm_handle_exit") 404d5d7bff0d ("KVM: X86: Introduce more exit_fastpath_completion enum values") dcf068da7eb2 ("KVM: VMX: Introduce generic fastpath handler") a9ab13ff6e84 ("KVM: X86: Improve latency for single target IPI fastpath") 873e1da16918 ("KVM: VMX: Optimize handling of VM-Entry failures in vmx_vcpu_run()") e64419d991ea ("KVM: x86: Move "flush guest's TLB" logic to separate kvm_x86_ops hook") 56a87e5d997b ("KVM: SVM: Fix __svm_vcpu_run declaration.")
199cd1d7b534 ("KVM: SVM: Split svm_vcpu_run inline assembly to separate file") eaf78265a4ab ("KVM: SVM: Move SEV code to separate file")
ef0f64960d01 ("KVM: SVM: Move AVIC code to separate file")
883b0a91f41a ("KVM: SVM: Move Nested SVM Implementation to nested.c") 46a010dd6896 ("kVM SVM: Move SVM related files to own sub-directory") 8c1b724ddb21 ("Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm")

thanks,

greg k-h

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

From 05311ce954aebe75935d9ae7d38ac82b5b796e33 Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <[email protected]>
Date: Thu, 3 Nov 2022 16:13:51 +0200
Subject: [PATCH] KVM: x86: remove exit_int_info warning in svm_handle_exit

It is valid to receive external interrupt and have broken IDT entry, which will lead to #GP with exit_int_into that will contain the index of the IDT entry (e.g any value).

Other exceptions can happen as well, like #NP or #SS (if stack switch fails).

Thus this warning can be user triggred and has very little value.

Message-Id: <[email protected]>

index 098f04bec8ef..c0950ae86b2b 100644
@@ -346,12 +346,6 @@ int svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
 	return 0;
 }
 
-static int is_external_interrupt(u32 info)
-{
-	info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
-	return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
-}
-
 static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_svm *svm = to_svm(vcpu);

@@ -3426,15 +3420,6 @@ static int svm_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
 		return 0;
 	}
 
-	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
-	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
-	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
-	    exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
-		printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
-		       "exit_code 0x%x\n",
-		       __func__, svm->vmcb->control.exit_int_info,
-		       exit_code);
-
 	if (exit_fastpath != EXIT_FASTPATH_NONE)
 		return 1;