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Fri, 18 Sep 2026 13:31:09 +0000 (GMT) Received: from tuxmaker.lnxne.boe (unknown [9.87.85.9]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 18 Sep 2026 13:31:09 +0000 (GMT) From: Steffen Eiden To: kvm@vger.kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Cc: Alexander Gordeev , Andreas Grapentin , Arnd Bergmann , Catalin Marinas , Christian Borntraeger , Claudio Imbrenda , David Hildenbrand , Friedrich Welter , Fuad Tabba , Gautam Gala , Hariharan Mari , Heiko Carstens , Hendrik Brueckner , Ilya Leoshkevich , Janosch Frank , Joey Gouly , Marc Zyngier , Nico Boehr , Nina Schoetterl-Glausch , Oliver Upton , Paolo Bonzini , Suzuki K Poulose , Sven Schnelle , Ulrich Weigand , Vasily Gorbik , Will Deacon , Zenghui Yu Subject: [PATCH v8 05/29] KVM: Restrict kvm_get_kvm/kvm_put_kvm export to internal KVM modules Date: Fri, 18 Sep 2026 15:30:42 +0200 Message-ID: <20260918133107.1042730-6-seiden@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260918133107.1042730-1-seiden@linux.ibm.com> References: <20260918133107.1042730-1-seiden@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: IzGp1T9JHTVQGhSGOM8MW0mgylfcyXqI X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE4MDE4NCBTYWx0ZWRfX/Ce7xezjbWGc qVkDsiLCaMfAhjqgZ+cHJvVobHmEsQKxt0wSKboXRDAgAmKMhvXeyug1/kVmlJWftHXcll0D7Ft P9Z4ziUSWtPBeTADmfH6Z1hzUc3egOk= X-Authority-Analysis: v=2.4 cv=cvgOAF4i c=1 sm=1 tr=0 ts=6aad3d27 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=1XWaLZrsAAAA:8 a=VnNF1IyMAAAA:8 a=cWV-k8hB2h86IYwIXi4A:9 X-Proofpoint-ORIG-GUID: 2cK9Jgsw_kboKG4yhhAg5SVvhmho0g-i X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE4MDE4NCBTYWx0ZWRfX9/m04V2tjKkt u0p1Ywr4vzs+xtCXCwLsTXBrSimc9Y1jKn/WJjwZB/2bKRp3mkp2plHyZQ1W3tY3s5ub7D9Go9H ozdg0N7BltEBDJaLyUuMoPJaugHRV71DJXj0S/ylryqgi+B0ajOIFIy/6RzyXNEtn8pOP8ukGPx GbZU1kYkjpD3E9gHMzxUpjI7OioFRiiolwAdirWiT2zdHN7IuY2iLOh4fdR+RxAOOOy98PsreTq rTkEXXC7WSGsCYMC4RUq8sCtshZSG0jodu6T+VOsPaNMjjXTl2TdW7eZmGFVB8kyWS7Lv/Iw083 PV+cJDNdbvjv0aveIZbnoP4Z0tp62Bm77PwCbloSB60lRQffrOdTaqnTD12NV8/TX+VmMNf61uR YRXJxYsPCNpQVYUyEJIR1PJTPozDoK5DJpZfSTTOEVLwQPfj+/XfGemwxabGyjOmNdVq87KyhhJ ugNvtwvzD4kJBYryP0Q== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-18_03,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 bulkscore=0 impostorscore=0 phishscore=0 spamscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609180184 Switch kvm_get_kvm, kvm_get_kvm_safe, and kvm_put_kvm from EXPORT_SYMBOL_GPL to EXPORT_SYMBOL_FOR_KVM_INTERNAL. These symbols are now only used within KVM itself. No external module needs them now that VFIO uses file-based reference counting. Remove the corresponding exemptions from the x86 KVM Makefile exports check. Suggested-by: Sean Christopherson Signed-off-by: Steffen Eiden --- arch/x86/kvm/Makefile | 5 +---- virt/kvm/kvm_main.c | 6 +++--- 2 files changed, 4 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index e6d395ede9e2..c6bf463f5032 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -61,10 +61,7 @@ exports_grep_trailer := --include='*.[ch]' -nrw $(srctree)/virt/kvm $(srctree)/a -e kvm_page_track_unregister_notifier \ -e kvm_write_track_add_gfn \ -e kvm_write_track_remove_gfn \ - -e kvm_file_to_kvm_fn \ - -e kvm_get_kvm \ - -e kvm_get_kvm_safe \ - -e kvm_put_kvm + -e kvm_file_to_kvm_fn # Force grep to emit a goofy group separator that can in turn be replaced with # the above newline macro (newlines in Make are a nightmare). Note, grep only diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index bab71d398236..891a67cb365a 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1314,7 +1314,7 @@ void kvm_get_kvm(struct kvm *kvm) { refcount_inc(&kvm->users_count); } -EXPORT_SYMBOL_GPL(kvm_get_kvm); +EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_get_kvm); /* * Make sure the vm is not during destruction, which is a safe version of @@ -1324,14 +1324,14 @@ bool kvm_get_kvm_safe(struct kvm *kvm) { return refcount_inc_not_zero(&kvm->users_count); } -EXPORT_SYMBOL_GPL(kvm_get_kvm_safe); +EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_get_kvm_safe); void kvm_put_kvm(struct kvm *kvm) { if (refcount_dec_and_test(&kvm->users_count)) kvm_destroy_vm(kvm); } -EXPORT_SYMBOL_GPL(kvm_put_kvm); +EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_put_kvm); /* * Used to put a reference that was taken on behalf of an object associated -- 2.53.0