KVM: SVM: Allocate IR data using atomic allocation

commit 7537deda36521fa8fff9133b39c46e31893606f2 upstream.

Allocate SVM's interrupt remapping metadata using GFP_ATOMIC as
svm_ir_list_add() is called with IRQs are disabled and irqfs.lock held
when kvm_irq_routing_update() reacts to GSI routing changes.

Fixes: 411b44ba80ab ("svm: Implements update_pi_irte hook to setup posted interrupt")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20250404193923.1413163-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c
index 4b74ea91f4e6bb6ea3cea52be67eaeed049c506e..0785c7e9c85281c69e37ab27f6e064dbc572885e 100644 (file)
--- a/arch/x86/kvm/svm/avic.c
+++ b/arch/x86/kvm/svm/avic.c
@@ -820,7 +820,7 @@ static int svm_ir_list_add(struct vcpu_svm *svm, struct amd_iommu_pi_data *pi)
         * Allocating new amd_iommu_pi_data, which will get
         * add to the per-vcpu ir_list.
         */
-       ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_KERNEL_ACCOUNT);
+       ir = kzalloc(sizeof(struct amd_svm_iommu_ir), GFP_ATOMIC | __GFP_ACCOUNT);
        if (!ir) {
                ret = -ENOMEM;
                goto out;