# git rev-parse -q --verify cfe255e01d0d6bf2a23d46613c3d4cfe4505dd02^{commit}
cfe255e01d0d6bf2a23d46613c3d4cfe4505dd02
already have revision, skipping fetch
# git checkout -q -f -B kisskb cfe255e01d0d6bf2a23d46613c3d4cfe4505dd02
# git clean -qxdf
# < git log -1
# commit cfe255e01d0d6bf2a23d46613c3d4cfe4505dd02
# Author: Oliver O'Halloran <oohall@gmail.com>
# Date:   Mon Nov 18 17:55:53 2019 +1100
# 
#     powerpc/powernv: Disable native PCIe port management
#     
#     On PowerNV the PCIe topology is (currently) managed by the powernv platform
#     code in Linux in cooperation with the platform firmware. Linux's native
#     PCIe port service drivers operate independently of both and this can cause
#     problems.
#     
#     The main issue is that the portbus driver will conflict with the platform
#     specific hotplug driver (pnv_php) over ownership of the MSI used to notify
#     the host when a hotplug event occurs. The portbus driver claims this MSI on
#     behalf of the individual port services because the same interrupt is used
#     for hotplug events, PMEs (on root ports), and link bandwidth change
#     notifications. The portbus driver will always claim the interrupt even if
#     the individual port service drivers, such as pciehp, are compiled out.
#     
#     The second, bigger, problem is that the hotplug port service driver
#     fundamentally does not work on PowerNV. The platform assumes that all
#     PCI devices have a corresponding arch-specific handle derived from the DT
#     node for the device (pci_dn) and without one the platform will not allow
#     a PCI device to be enabled. This problem is largely due to historical
#     baggage, but it can't be resolved without significant re-factoring of the
#     platform PCI support.
#     
#     We can fix these problems in the interim by setting the
#     "pcie_ports_disabled" flag during platform initialisation. The flag
#     indicates the platform owns the PCIe ports which stops the portbus driver
#     from being registered.
#     
#     This does have the side effect of disabling all port services drivers
#     that is: AER, PME, BW notifications, hotplug, and DPC. However, this is
#     not a huge disadvantage on PowerNV since these services are either unused
#     or handled through other means.
#     
#     Fixes: 66725152fb9f ("PCI/hotplug: PowerPC PowerNV PCI hotplug driver")
#     Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191118065553.30362-1-oohall@gmail.com
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 cfe255e01d0d6bf2a23d46613c3d4cfe4505dd02
# < make -s -j 48 ARCH=x86 O=/kisskb/build/powerpc-next_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# yes \n | make -s -j 48 ARCH=x86 O=/kisskb/build/powerpc-next_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=x86 O=/kisskb/build/powerpc-next_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/tools/objtool
/kisskb/src/security/integrity/platform_certs/load_uefi.c:17:19: warning: 'efi_cert_sha256_guid' defined but not used [-Wunused-variable]
 static efi_guid_t efi_cert_sha256_guid __initdata = EFI_CERT_SHA256_GUID;
                   ^~~~~~~~~~~~~~~~~~~~
/kisskb/src/security/integrity/platform_certs/load_uefi.c:15:19: warning: 'efi_cert_x509_sha256_guid' defined but not used [-Wunused-variable]
 static efi_guid_t efi_cert_x509_sha256_guid __initdata =
                   ^~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/security/integrity/platform_certs/load_uefi.c:14:19: warning: 'efi_cert_x509_guid' defined but not used [-Wunused-variable]
 static efi_guid_t efi_cert_x509_guid __initdata = EFI_CERT_X509_GUID;
                   ^~~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/powerpc-next_x86-allmodconfig_x86_64-gcc8
# Build took: 0:24:43.721774