# 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-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 8e80a73fa9a7747e3e8255cb149c543aabf65a24
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/kilauea_defconfig
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_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/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5
# Build took: 0:00:27.884167