This is a note to let you know that I've just added the patch titled
KVM: x86: remove exit_int_info warning in svm_handle_exit
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-x86-remove-exit_int_info-warning-in-svm_handle_exit.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 05311ce954aebe75935d9ae7d38ac82b5b796e33 Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
Date: Thu, 3 Nov 2022 16:13:51 +0200
Subject: KVM: x86: remove exit_int_info warning in svm_handle_exit
From: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
commit 05311ce954aebe75935d9ae7d38ac82b5b796e33 upstream.
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.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
Message-Id: <20221103141351.50662-10-mlevitsk@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/svm/svm.c | 15 ---------------
1 file changed, 15 deletions(-)
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -305,12 +305,6 @@ int svm_set_efer(struct kvm_vcpu *vcpu,
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);
@@ -3116,15 +3110,6 @@ static int handle_exit(struct kvm_vcpu *
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;
Patches currently in stable-queue which might be from mlevitsk@xxxxxxxxxx are
queue-5.10/kvm-x86-emulator-update-the-emulation-mode-after-rsm.patch
queue-5.10/kvm-x86-nsvm-leave-nested-mode-on-vcpu-free.patch
queue-5.10/kvm-x86-remove-exit_int_info-warning-in-svm_handle_exit.patch
