This is a note to let you know that I've just added the patch titled
KVM: x86: add kvm_leave_nested
to the 5.15-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-add-kvm_leave_nested.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f9697df251438b0798780900e8b43bdb12a56d64 Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
Date: Thu, 3 Nov 2022 16:13:45 +0200
Subject: KVM: x86: add kvm_leave_nested
From: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
commit f9697df251438b0798780900e8b43bdb12a56d64 upstream.
add kvm_leave_nested which wraps a call to nested_ops->leave_nested
into a function.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
Message-Id: <20221103141351.50662-4-mlevitsk@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/svm/nested.c | 3 ---
arch/x86/kvm/vmx/nested.c | 3 ---
arch/x86/kvm/x86.c | 8 +++++++-
3 files changed, 7 insertions(+), 7 deletions(-)
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -940,9 +940,6 @@ void svm_free_nested(struct vcpu_svm *sv
svm->nested.initialized = false;
}
-/*
- * Forcibly leave nested mode in order to be able to reset the VCPU later on.
- */
void svm_leave_nested(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -6276,9 +6276,6 @@ out:
return kvm_state.size;
}
-/*
- * Forcibly leave nested mode in order to be able to reset the VCPU later on.
- */
void vmx_leave_nested(struct kvm_vcpu *vcpu)
{
if (is_guest_mode(vcpu)) {
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -608,6 +608,12 @@ void kvm_deliver_exception_payload(struc
}
EXPORT_SYMBOL_GPL(kvm_deliver_exception_payload);
+/* Forcibly leave the nested mode in cases like a vCPU reset */
+static void kvm_leave_nested(struct kvm_vcpu *vcpu)
+{
+ kvm_x86_ops.nested_ops->leave_nested(vcpu);
+}
+
static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
unsigned nr, bool has_error, u32 error_code,
bool has_payload, unsigned long payload, bool reinject)
@@ -4775,7 +4781,7 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_e
if (events->flags & KVM_VCPUEVENT_VALID_SMM) {
if (!!(vcpu->arch.hflags & HF_SMM_MASK) != events->smi.smm) {
- kvm_x86_ops.nested_ops->leave_nested(vcpu);
+ kvm_leave_nested(vcpu);
kvm_smm_changed(vcpu, events->smi.smm);
}
Patches currently in stable-queue which might be from mlevitsk@xxxxxxxxxx are
queue-5.15/kvm-x86-nsvm-harden-svm_free_nested-against-freeing-vmcb02-while-still-in-use.patch
queue-5.15/kvm-x86-forcibly-leave-nested-mode-on-vcpu-reset.patch
queue-5.15/kvm-x86-nsvm-leave-nested-mode-on-vcpu-free.patch
queue-5.15/kvm-x86-add-kvm_leave_nested.patch
queue-5.15/kvm-x86-remove-exit_int_info-warning-in-svm_handle_exit.patch
