kernel/linux.git/arch/s390/boot, branch v5.15.208

s390/boot: Remove alt_stfle_fac_list from decompressor

2024-06-16T11:39:41+00:00

[ Upstream commit e7dec0b7926f3cd493c697c4c389df77e8e8a34c ] It is nowhere used in the decompressor, therefore remove it. Fixes: 17e89e1340a3 ("s390/facilities: move stfl information from lowcore to global data") Reviewed-by: Heiko Carstens Signed-off-by: Sven Schnelle Signed-off-by: Heiko Carstens Signed-off-by: Sasha Levin

s390/ipl: add missing intersection check to ipl_report handling

2023-03-22T12:31:32+00:00

commit a52e5cdbe8016d4e3e6322fd93d71afddb9a5af9 upstream. The code which handles the ipl report is searching for a free location in memory where it could copy the component and certificate entries to. It checks for intersection between the sections required for the kernel and the component/certificate data area, but fails to check whether the data structures linking these data areas together intersect. This might cause the iplreport copy code to overwrite the iplreport itself. Fix this by adding two addtional intersection checks. Cc: Fixes: 9641b8cc733f ("s390/ipl: read IPL report at early boot") Signed-off-by: Sven Schnelle Reviewed-by: Vasily Gorbik Signed-off-by: Vasily Gorbik Signed-off-by: Greg Kroah-Hartman

s390/mem_detect: fix detect_memory() error handling

2023-03-10T08:39:14+00:00

[ Upstream commit 3400c35a4090704e6c465449616ab7e67a9209e7 ] Currently if for some reason sclp_early_read_info() fails, sclp_early_get_memsize() will not set max_physmem_end and it will stay uninitialized. Any garbage value other than 0 will lead to detect_memory() taking wrong path or returning a garbage value as max_physmem_end. To avoid that simply initialize max_physmem_end. Fixes: 73045a08cf55 ("s390: unify identity mapping limits handling") Reported-by: Alexander Gordeev Reviewed-by: Alexander Gordeev Signed-off-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Sasha Levin

s390/decompressor: specify __decompress() buf len to avoid overflow

2023-02-22T11:57:02+00:00

[ Upstream commit 7ab41c2c08a32132ba8c14624910e2fe8ce4ba4b ] Historically calls to __decompress() didn't specify "out_len" parameter on many architectures including s390, expecting that no writes beyond uncompressed kernel image are performed. This has changed since commit 2aa14b1ab2c4 ("zstd: import usptream v1.5.2") which includes zstd library commit 6a7ede3dfccb ("Reduce size of dctx by reutilizing dst buffer (#2751)"). Now zstd decompression code might store literal buffer in the unwritten portion of the destination buffer. Since "out_len" is not set, it is considered to be unlimited and hence free to use for optimization needs. On s390 this might corrupt initrd or ipl report which are often placed right after the decompressor buffer. Luckily the size of uncompressed kernel image is already known to the decompressor, so to avoid the problem simply specify it in the "out_len" parameter. Link: https://github.com/facebook/zstd/commit/6a7ede3dfccb Signed-off-by: Vasily Gorbik Tested-by: Alexander Egorenkov Link: https://lore.kernel.org/r/patch-1.thread-41c676.git-41c676c2d153.your-ad-here.call-01675030179-ext-9637@work.hours Signed-off-by: Heiko Carstens Signed-off-by: Sasha Levin

s390/boot: add secure boot trailer

2022-11-10T17:15:32+00:00

[ Upstream commit aa127a069ef312aca02b730d5137e1778d0c3ba7 ] This patch enhances the kernel image adding a trailer as required for secure boot by future firmware versions. Cc: # 5.2+ Signed-off-by: Peter Oberparleiter Reviewed-by: Sven Schnelle Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin

s390/boot: allocate amode31 section in decompressor

2022-07-12T14:34:56+00:00

[ Upstream commit e3ec8e0f5711d73f7e5d5c3cffdf4fad4f1487b9 ] The memory for amode31 section is allocated from the decompressed kernel. Instead, allocate that memory from the decompressor. This is a prerequisite to allow initialization of the virtual memory before the decompressed kernel takes over. Reviewed-by: Heiko Carstens Signed-off-by: Alexander Gordeev Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin

s390/boot: simplify and fix kernel memory layout setup

2021-11-25T08:48:45+00:00

commit 9a39abb7c9aab50eec4ac4421e9ee7f3de013d24 upstream. Initial KASAN shadow memory range was picked to preserve original kernel modules area position. With protected execution support, which might impose addressing limitation on vmalloc area and hence affect modules area position, current fixed KASAN shadow memory range is only making kernel memory layout setup more complex. So move it to the very end of available virtual space and simplify calculations. At the same time return to previous kernel address space split. In particular commit 0c4f2623b957 ("s390: setup kernel memory layout early") introduced precise identity map size calculation and keeping vmemmap left most starting from a fresh region table entry. This didn't take into account additional mapping region requirement for potential DCSS mapping above available physical memory. So go back to virtual space split between 1:1 mapping & vmemmap array once vmalloc area size is subtracted. Cc: stable@vger.kernel.org Fixes: 0c4f2623b957 ("s390: setup kernel memory layout early") Reported-by: Gerald Schaefer Reviewed-by: Heiko Carstens Reviewed-by: Alexander Gordeev Signed-off-by: Vasily Gorbik Signed-off-by: Heiko Carstens Signed-off-by: Greg Kroah-Hartman

Merge tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2021-09-03T22:33:47+00:00

Pull Kbuild updates from Masahiro Yamada: - Add -s option (strict mode) to merge_config.sh to make it fail when any symbol is redefined. - Show a warning if a different compiler is used for building external modules. - Infer --target from ARCH for CC=clang to let you cross-compile the kernel without CROSS_COMPILE. - Make the integrated assembler default (LLVM_IAS=1) for CC=clang. - Add to the kernel source instead of borrowing from the compiler. - Add Nick Desaulniers as a Kbuild reviewer. - Drop stale cc-option tests. - Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG to handle symbols in inline assembly. - Show a warning if 'FORCE' is missing for if_changed rules. - Various cleanups * tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits) kbuild: redo fake deps at include/ksym/*.h kbuild: clean up objtool_args slightly modpost: get the *.mod file path more simply checkkconfigsymbols.py: Fix the '--ignore' option kbuild: merge vmlinux_link() between ARCH=um and other architectures kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh kbuild: merge vmlinux_link() between the ordinary link and Clang LTO kbuild: remove stale *.symversions kbuild: remove unused quiet_cmd_update_lto_symversions gen_compile_commands: extract compiler command from a series of commands x86: remove cc-option-yn test for -mtune= arc: replace cc-option-yn uses with cc-option s390: replace cc-option-yn uses with cc-option ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild sparc: move the install rule to arch/sparc/Makefile security: remove unneeded subdir-$(CONFIG_...) kbuild: sh: remove unused install script kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y kbuild: Switch to 'f' variants of integrated assembler flag kbuild: Shuffle blank line to improve comment meaning ...

Merge tag 's390-5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2021-08-30T20:07:15+00:00

Pull s390 updates from Heiko Carstens: - Improve ftrace code patching so that stop_machine is not required anymore. This requires a small common code patch acked by Steven Rostedt: https://lore.kernel.org/linux-s390/20210730220741.4da6fdf6@oasis.local.home/ - Enable KCSAN for s390. This comes with a small common code change to fix a compile warning. Acked by Marco Elver: https://lore.kernel.org/r/20210729142811.1309391-1-hca@linux.ibm.com - Add KFENCE support for s390. This also comes with a minimal x86 patch from Marco Elver who said also this can be carried via the s390 tree: https://lore.kernel.org/linux-s390/YQJdarx6XSUQ1tFZ@elver.google.com/ - More changes to prepare the decompressor for relocation. - Enable DAT also for CPU restart path. - Final set of register asm removal patches; leaving only three locations where needed and sane. - Add NNPA, Vector-Packed-Decimal-Enhancement Facility 2, PCI MIO support to hwcaps flags. - Cleanup hwcaps implementation. - Add new instructions to in-kernel disassembler. - Various QDIO cleanups. - Add SCLP debug feature. - Various other cleanups and improvements all over the place. * tag 's390-5.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (105 commits) s390: remove SCHED_CORE from defconfigs s390/smp: do not use nodat_stack for secondary CPU start s390/smp: enable DAT before CPU restart callback is called s390: update defconfigs s390/ap: fix state machine hang after failure to enable irq KVM: s390: generate kvm hypercall functions s390/sclp: add tracing of SCLP interactions s390/debug: add early tracing support s390/debug: fix debug area life cycle s390/debug: keep debug data on resize s390/diag: make restart_part2 a local label s390/mm,pageattr: fix walk_pte_level() early exit s390: fix typo in linker script s390: remove do_signal() prototype and do_notify_resume() function s390/crypto: fix all kernel-doc warnings in vfio_ap_ops.c s390/pci: improve DMA translation init and exit s390/pci: simplify CLP List PCI handling s390/pci: handle FH state mismatch only on disable s390/pci: fix misleading rc in clp_set_pci_fn() s390/boot: factor out offset_vmlinux_info() function ...

s390/boot: factor out offset_vmlinux_info() function

2021-08-25T09:03:33+00:00

Move offsetting all of vmlinux_info fields to a separate function for better readability. Signed-off-by: Alexander Gordeev Signed-off-by: Vasily Gorbik Signed-off-by: Heiko Carstens