# git rev-parse -q --verify a3bf9fbdad600b1e4335dd90979f8d6072e4f602^{commit} a3bf9fbdad600b1e4335dd90979f8d6072e4f602 already have revision, skipping fetch # git checkout -q -f -B kisskb a3bf9fbdad600b1e4335dd90979f8d6072e4f602 # git clean -qxdf # < git log -1 # commit a3bf9fbdad600b1e4335dd90979f8d6072e4f602 # Author: Greg Kurz # Date: Wed May 15 12:05:01 2019 +0200 # # powerpc/pseries: Fix xive=off command line # # On POWER9, if the hypervisor supports XIVE exploitation mode, the # guest OS will unconditionally requests for the XIVE interrupt mode # even if XIVE was deactivated with the kernel command line xive=off. # Later on, when the spapr XIVE init code handles xive=off, it disables # XIVE and tries to fall back on the legacy mode XICS. # # This discrepency causes a kernel panic because the hypervisor is # configured to provide the XIVE interrupt mode to the guest : # # kernel BUG at arch/powerpc/sysdev/xics/xics-common.c:135! # ... # NIP xics_smp_probe+0x38/0x98 # LR xics_smp_probe+0x2c/0x98 # Call Trace: # xics_smp_probe+0x2c/0x98 (unreliable) # pSeries_smp_probe+0x40/0xa0 # smp_prepare_cpus+0x62c/0x6ec # kernel_init_freeable+0x148/0x448 # kernel_init+0x2c/0x148 # ret_from_kernel_thread+0x5c/0x68 # # Look for xive=off during prom_init and don't ask for XIVE in this # case. One exception though: if the host only supports XIVE, we still # want to boot so we ignore xive=off. # # Similarly, have the spapr XIVE init code to looking at the interrupt # mode negotiated during CAS, and ignore xive=off if the hypervisor only # supports XIVE. # # Fixes: eac1e731b59e ("powerpc/xive: guest exploitation of the XIVE interrupt controller") # Cc: stable@vger.kernel.org # v4.20 # Reported-by: Pavithra R. Prakash # Signed-off-by: Greg Kurz # Reviewed-by: Cédric Le Goater # Signed-off-by: Michael Ellerman # < /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 a3bf9fbdad600b1e4335dd90979f8d6072e4f602 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_83xx_mpc834x_itx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 83xx/mpc834x_itx_defconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_83xx_mpc834x_itx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/kernel/futex.c: In function 'do_futex': /kisskb/src/kernel/futex.c:1658:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized] return oldval == cmparg; ^ /kisskb/src/kernel/futex.c:1633:6: note: 'oldval' was declared here int oldval, ret; ^ INFO: Uncompressed kernel (size 0x5c11a0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5c11a0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x5b0a88) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.2.0-rc2-ga3bf9fbdad60 Created: Mon Jun 3 07:56:46 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2917243 Bytes = 2848.87 KiB = 2.78 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.2.0-rc2-ga3bf9fbdad60 Created: Mon Jun 3 07:56:46 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2947010 Bytes = 2877.94 KiB = 2.81 MiB Load Address: 00600000 Entry Point: 00600294 Image Name: Linux-5.2.0-rc2-ga3bf9fbdad60 Created: Mon Jun 3 07:56:46 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2946522 Bytes = 2877.46 KiB = 2.81 MiB Load Address: 00600000 Entry Point: 00600294 Completed OK # rm -rf /kisskb/build/powerpc-next_83xx_mpc834x_itx_defconfig_powerpc-gcc5 # Build took: 0:00:39.836664