# git rev-parse -q --verify 19ce7909ed11c49f7eddf59e7f49cd3062bf83d5^{commit} 19ce7909ed11c49f7eddf59e7f49cd3062bf83d5 already have revision, skipping fetch # git checkout -q -f -B kisskb 19ce7909ed11c49f7eddf59e7f49cd3062bf83d5 # git clean -qxdf # < git log -1 # commit 19ce7909ed11c49f7eddf59e7f49cd3062bf83d5 # Author: Nicholas Piggin # Date: Fri Apr 6 03:56:30 2018 +1000 # # KVM: PPC: Book3S HV: trace_tlbie must not be called in realmode # # This crashes with a "Bad real address for load" attempting to load # from the vmalloc region in realmode (faulting address is in DAR). # # Oops: Bad interrupt in KVM entry/exit code, sig: 6 [#1] # LE SMP NR_CPUS=2048 NUMA PowerNV # CPU: 53 PID: 6582 Comm: qemu-system-ppc Not tainted 4.16.0-01530-g43d1859f0994 # NIP: c0000000000155ac LR: c0000000000c2430 CTR: c000000000015580 # REGS: c000000fff76dd80 TRAP: 0200 Not tainted (4.16.0-01530-g43d1859f0994) # MSR: 9000000000201003 CR: 48082222 XER: 00000000 # CFAR: 0000000102900ef0 DAR: d00017fffd941a28 DSISR: 00000040 SOFTE: 3 # NIP [c0000000000155ac] perf_trace_tlbie+0x2c/0x1a0 # LR [c0000000000c2430] do_tlbies+0x230/0x2f0 # # I suspect the reason is the per-cpu data is not in the linear chunk. # This could be restored if that was able to be fixed, but for now, # just remove the tracepoints. # # Fixes: 0428491cba92 ("powerpc/mm: Trace tlbie(l) instructions") # Cc: stable@vger.kernel.org # v4.13+ # Signed-off-by: Nicholas Piggin # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 19ce7909ed11c49f7eddf59e7f49cd3062bf83d5 # < make -s -j 20 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc40x_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc40x_defconfig # make -s -j 20 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc40x_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:182:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here arch/powerpc/boot/ep405.dtb: Warning (pci_bridge): /plb/pci@ec000000: missing bus-range for PCI bridge arch/powerpc/boot/ep405.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' arch/powerpc/boot/walnut.dtb: Warning (pci_bridge): /plb/pci@ec000000: missing bus-range for PCI bridge arch/powerpc/boot/walnut.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' arch/powerpc/boot/hotfoot.dtb: Warning (pci_bridge): /plb/pci@ec000000: missing bus-range for PCI bridge arch/powerpc/boot/hotfoot.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge' INFO: Uncompressed kernel (size 0x505768) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x505768) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x505768) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x505768) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x4f50f4) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) Image Name: Linux-4.16.0-g19ce790 Created: Wed Apr 11 21:06:25 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2533172 Bytes = 2473.80 kB = 2.42 MB Load Address: 00600000 Entry Point: 00601534 Image Name: Linux-4.16.0-g19ce790 Created: Wed Apr 11 21:06:25 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2507249 Bytes = 2448.49 kB = 2.39 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.16.0-g19ce790 Created: Wed Apr 11 21:06:25 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2532112 Bytes = 2472.77 kB = 2.41 MB Load Address: 00600000 Entry Point: 00601350 Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc40x_defconfig_powerpc # Build took: 0:00:46.049108