kernel/linux.git/arch/powerpc/kvm, branch v6.12.91

fdget(), trivial conversions

2026-05-23T11:04:35+00:00

[ Upstream commit 6348be02eead77bdd1562154ed6b3296ad3b3750 ] fdget() is the first thing done in scope, all matching fdput() are immediately followed by leaving the scope. Reviewed-by: Christian Brauner Signed-off-by: Al Viro Stable-dep-of: 66052a768d47 ("fanotify: call fanotify_events_supported() before path_permission() and security_path_notify()") Signed-off-by: Sasha Levin

KVM: Remove subtle "struct kvm_stats_desc" pseudo-overlay

2026-04-22T11:19:01+00:00

[ Upstream commit da142f3d373a6ddaca0119615a8db2175ddc4121 ] Remove KVM's internal pseudo-overlay of kvm_stats_desc, which subtly aliases the flexible name[] in the uAPI definition with a fixed-size array of the same name. The unusual embedded structure results in compiler warnings due to -Wflex-array-member-not-at-end, and also necessitates an extra level of dereferencing in KVM. To avoid the "overlay", define the uAPI structure to have a fixed-size name when building for the kernel. Opportunistically clean up the indentation for the stats macros, and replace spaces with tabs. No functional change intended. Reported-by: Gustavo A. R. Silva Closes: https://lore.kernel.org/all/aPfNKRpLfhmhYqfP@kspp Acked-by: Marc Zyngier Acked-by: Christian Borntraeger [..] Acked-by: Anup Patel Reviewed-by: Bibo Mao Acked-by: Gustavo A. R. Silva Link: https://patch.msgid.link/20251205232655.445294-1-seanjc@google.com Signed-off-by: Sean Christopherson Signed-off-by: Sasha Levin

KVM: PPC: Enable CAP_SPAPR_TCE_VFIO on pSeries KVM guests

2025-04-20T08:15:54+00:00

commit b4392813bbc3b05fc01a33c64d8b8c6c62c32cfa upstream. Currently on book3s-hv, the capability KVM_CAP_SPAPR_TCE_VFIO is only available for KVM Guests running on PowerNV and not for the KVM guests running on pSeries hypervisors. This prevents a pSeries L2 guest from leveraging the in-kernel acceleration for H_PUT_TCE_INDIRECT and H_STUFF_TCE hcalls that results in slow startup times for large memory guests. Support for VFIO on pSeries was restored in commit f431a8cde7f1 ("powerpc/iommu: Reimplement the iommu_table_group_ops for pSeries"), making it possible to re-enable this capability on pSeries hosts. This change enables KVM_CAP_SPAPR_TCE_VFIO for nested PAPR guests on pSeries, while maintaining the existing behavior on PowerNV. Booting an L2 guest with 128GB of memory shows an average 11% improvement in startup time. Fixes: f431a8cde7f1 ("powerpc/iommu: Reimplement the iommu_table_group_ops for pSeries") Cc: stable@vger.kernel.org Reviewed-by: Vaibhav Jain Reviewed-by: Ritesh Harjani (IBM) Signed-off-by: Amit Machhiwal Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250220070002.1478849-1-amachhiw@linux.ibm.com Signed-off-by: Greg Kroah-Hartman

KVM: e500: always restore irqs

2025-03-13T12:02:19+00:00

commit 87ecfdbc699cc95fac73291b52650283ddcf929d upstream. If find_linux_pte fails, IRQs will not be restored. This is unlikely to happen in practice since it would have been reported as hanging hosts, but it should of course be fixed anyway. Cc: stable@vger.kernel.org Reported-by: Sean Christopherson Signed-off-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman

Revert "KVM: PPC: e500: Mark "struct page" dirty in kvmppc_e500_shadow_map()"

2025-03-13T12:02:19+00:00

This reverts commit dec857329fb9a66a5bce4f9db14c97ef64725a32 which is commit c9be85dabb376299504e0d391d15662c0edf8273 upstream. It should not have been applied. Link: https://lore.kernel.org/r/CABgObfb5U9zwTQBPkPB=mKu-vMrRspPCm4wfxoQpB+SyAnb5WQ@mail.gmail.com Reported-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman

Revert "KVM: PPC: e500: Mark "struct page" pfn accessed before dropping mmu_lock"

2025-03-13T12:02:19+00:00

This reverts commit f2623aec7fdc2675667042c85f87502c9139c098 which is commit 84cf78dcd9d65c45ab73998d4ad50f433d53fb93 upstream. It should not have been applied. Link: https://lore.kernel.org/r/CABgObfb5U9zwTQBPkPB=mKu-vMrRspPCm4wfxoQpB+SyAnb5WQ@mail.gmail.com Reported-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman

Revert "KVM: PPC: e500: Use __kvm_faultin_pfn() to handle page faults"

2025-03-13T12:02:19+00:00

This reverts commit 833f69be62ac366b5c23b4a6434389e470dd5c7f which is commit 419cfb983ca93e75e905794521afefcfa07988bb upstream. It should not have been applied. Link: https://lore.kernel.org/r/CABgObfb5U9zwTQBPkPB=mKu-vMrRspPCm4wfxoQpB+SyAnb5WQ@mail.gmail.com Reported-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman

Revert "KVM: e500: always restore irqs"

2025-03-13T12:02:18+00:00

This reverts commit 48fe216d7db6b651972c1c1d8e3180cd699971b0 which is commit 87ecfdbc699cc95fac73291b52650283ddcf929d upstream. It should not have been applied. Link: https://lore.kernel.org/r/CABgObfb5U9zwTQBPkPB=mKu-vMrRspPCm4wfxoQpB+SyAnb5WQ@mail.gmail.com Reported-by: Paolo Bonzini Signed-off-by: Greg Kroah-Hartman

KVM: e500: always restore irqs

2025-02-17T09:04:56+00:00

[ Upstream commit 87ecfdbc699cc95fac73291b52650283ddcf929d ] If find_linux_pte fails, IRQs will not be restored. This is unlikely to happen in practice since it would have been reported as hanging hosts, but it should of course be fixed anyway. Cc: stable@vger.kernel.org Reported-by: Sean Christopherson Signed-off-by: Paolo Bonzini Signed-off-by: Sasha Levin

KVM: PPC: e500: Use __kvm_faultin_pfn() to handle page faults

2025-02-17T09:04:56+00:00

[ Upstream commit 419cfb983ca93e75e905794521afefcfa07988bb ] Convert PPC e500 to use __kvm_faultin_pfn()+kvm_release_faultin_page(), and continue the inexorable march towards the demise of kvm_pfn_to_refcounted_page(). Signed-off-by: Sean Christopherson Tested-by: Dmitry Osipenko Signed-off-by: Paolo Bonzini Message-ID: <20241010182427.1434605-55-seanjc@google.com> Stable-dep-of: 87ecfdbc699c ("KVM: e500: always restore irqs") Signed-off-by: Sasha Levin