# git rev-parse -q --verify 8e80a73fa9a7747e3e8255cb149c543aabf65a24^{commit}
8e80a73fa9a7747e3e8255cb149c543aabf65a24
already have revision, skipping fetch
# git checkout -q -f -B kisskb 8e80a73fa9a7747e3e8255cb149c543aabf65a24
# git clean -qxdf
# < git log -1
# commit 8e80a73fa9a7747e3e8255cb149c543aabf65a24
# Author: Cédric Le Goater <clg@kaod.org>
# Date:   Tue Nov 16 14:40:22 2021 +0100
# 
#     powerpc/xive: Change IRQ domain to a tree domain
#     
#     Commit 4f86a06e2d6e ("irqdomain: Make normal and nomap irqdomains
#     exclusive") introduced an IRQ_DOMAIN_FLAG_NO_MAP flag to isolate the
#     'nomap' domains still in use under the powerpc arch. With this new
#     flag, the revmap_tree of the IRQ domain is not used anymore. This
#     change broke the support of shared LSIs [1] in the XIVE driver because
#     it was relying on a lookup in the revmap_tree to query previously
#     mapped interrupts. Linux now creates two distinct IRQ mappings on the
#     same HW IRQ which can lead to unexpected behavior in the drivers.
#     
#     The XIVE IRQ domain is not a direct mapping domain and its HW IRQ
#     interrupt number space is rather large : 1M/socket on POWER9 and
#     POWER10, change the XIVE driver to use a 'tree' domain type instead.
#     
#     [1] For instance, a linux KVM guest with virtio-rng and virtio-balloon
#         devices.
#     
#     Fixes: 4f86a06e2d6e ("irqdomain: Make normal and nomap irqdomains exclusive")
#     Cc: stable@vger.kernel.org # v5.14+
#     Signed-off-by: Cédric Le Goater <clg@kaod.org>
#     Tested-by: Greg Kurz <groug@kaod.org>
#     Acked-by: Marc Zyngier <maz@kernel.org>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20211116134022.420412-1-clg@kaod.org
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 8e80a73fa9a7747e3e8255cb149c543aabf65a24
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  mpc85xx_defconfig
# Added to kconfig CONFIG_PPC_E500MC=y
# Added to kconfig CONFIG_VIRTUALIZATION=y
# Added to kconfig CONFIG_KVM_E500MC=y
# Added to kconfig 
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
.config:4301:warning: override: reassigning to symbol PPC_E500MC
.config:4302:warning: override: reassigning to symbol VIRTUALIZATION
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
<stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp]
In file included from /kisskb/src/include/linux/build_bug.h:5,
                 from /kisskb/src/include/linux/container_of.h:5,
                 from /kisskb/src/include/linux/list.h:5,
                 from /kisskb/src/include/linux/module.h:12,
                 from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15:
/kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd':
/kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
   22 | #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)
      |                                                 ^
/kisskb/src/include/linux/compiler.h:78:45: note: in definition of macro 'unlikely'
   78 | # define unlikely(x)    __builtin_expect(!!(x), 0)
      |                                             ^
/kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:13: note: in expansion of macro 'IS_ERR_VALUE'
  139 |         if (IS_ERR_VALUE(fep->ring_mem_addr))
      |             ^~~~~~~~~~~~
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0"
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0)
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0"
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0)
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_mpc85xx_defconfig+KVM_powerpc-gcc11
# Build took: 0:01:49.617784