# git rev-parse -q --verify c83c7a55453f822f602332d22328a288f281ff59^{commit}
c83c7a55453f822f602332d22328a288f281ff59
already have revision, skipping fetch
# git checkout -q -f -B kisskb c83c7a55453f822f602332d22328a288f281ff59
# git clean -qxdf
# < git log -1
# commit c83c7a55453f822f602332d22328a288f281ff59
# Author: Alexey Kardashevskiy <aik@ozlabs.ru>
# Date:   Fri Sep 3 15:15:25 2021 +1000
# 
#     KVM: PPC: Merge powerpc's debugfs entry content into generic entry
#     
#     At the moment KVM on PPC creates 3 types of entries under the kvm debugfs:
#     1) "%pid-%fd" per a KVM instance (for all platforms);
#     2) "vm%pid" (for PPC Book3s HV KVM);
#     3) "vm%u_vcpu%u_timing" (for PPC Book3e KVM).
#     
#     The problem with this is that multiple VMs per process is not allowed for
#     2) and 3) which makes it possible for userspace to trigger errors when
#     creating duplicated debugfs entries.
#     
#     This merges all these into 1).
#     
#     This defines kvm_arch_create_kvm_debugfs() similar to
#     kvm_arch_create_vcpu_debugfs().
#     
#     This defines 2 hooks in kvmppc_ops that allow specific KVM implementations
#     add necessary entries, this adds the _e500 suffix to
#     kvmppc_create_vcpu_debugfs_e500() to make it clear what platform it is for.
#     
#     This makes use of already existing kvm_arch_create_vcpu_debugfs() on PPC.
#     
#     This removes no more used debugfs_dir pointers from PPC kvm_arch structs.
#     
#     This stops removing vcpu entries as once created vcpus stay around
#     for the entire life of a VM and removed when the KVM instance is closed,
#     see d56f5136b010 ("KVM: let kvm_destroy_vm_debugfs clean up vCPU
#     debugfs directories".
#     
#     Suggested-by: Fabiano Rosas <farosas@linux.ibm.com>
#     Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     ---
#     Changes:
#     v3:
#     * reworked commit log, especially, the bit about removing vcpus
#     
#     v2:
#     * handled powerpc-booke
#     * s/kvm/vm/ in arch hooks
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 c83c7a55453f822f602332d22328a288f281ff59
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/aik_powernv_defconfig+STRICT_RWX_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_RELOCATABLE=n
# Added to kconfig CONFIG_STRICT_KERNEL_RWX=y
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/aik_powernv_defconfig+STRICT_RWX_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 8 ARCH=powerpc O=/kisskb/build/aik_powernv_defconfig+STRICT_RWX_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
.config:4063:warning: override: reassigning to symbol RELOCATABLE
# make -s -j 8 ARCH=powerpc O=/kisskb/build/aik_powernv_defconfig+STRICT_RWX_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
<stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp]
Completed OK
# rm -rf /kisskb/build/aik_powernv_defconfig+STRICT_RWX_powerpc-gcc5
# Build took: 0:05:28.638053