- 07 May, 2024 11 commits
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Kunwu Chan authored
This part was commented from commit 165785e5 ("[POWERPC] Cell iommu support") in about 17 years before. If there are no plans to enable this part code in the future, we can remove this dead code. Signed-off-by:
Kunwu Chan <chentao@kylinos.cn> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240125082637.532826-1-chentao@kylinos.cn
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GUO Zihua authored
The first 32k of memory is reserved for interrupt vectors, however for powerpc64 this might not be enough. Fix this by reserving the maximum size between 32k and the real size of interrupt vectors. Signed-off-by:
GUO Zihua <guozihua@huawei.com> Signed-off-by:
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Li Yang authored
Update the node name to be align with binding document. Signed-off-by:
Li Yang <leoyang.li@nxp.com> Signed-off-by:
Frank Li <Frank.Li@nxp.com> Signed-off-by:
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Li Yang authored
Update dts to match dts binding document. Signed-off-by:
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Xiaowei Bao authored
Due to the INTA is shared with the active-low PHY2 interrupt on P1010RDB-PA board, so configure P1010RDB-PA's INTA with polarity as active-low, the P1010RDB-PB board is used separately, so configure P1010RDB-PB's INTA with polarity as active-high. The INTX in P1010RDB-PB do not work because of the pcie@0 node fixup will be overwrited by p1010si-post.dtsi file, so we move the pcie@0 node fixup to p1010rdb-pb.dts and p1010rdb-pb_36b.dts. Signed-off-by:
Xiaowei Bao <xiaowei.bao@nxp.com> Signed-off-by:
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Ran Wang authored
Enable Power Management feature on device tree, including MPC8536, MPC8544, MPC8548, MPC8572, P1010, P1020, P1021, P1022, P2020, P2041, P3041, T104X, T1024. Signed-off-by:
Zhao Chenhui <chenhui.zhao@freescale.com> Signed-off-by:
Ran Wang <ran.wang_1@nxp.com> Signed-off-by:
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Yang Li authored
This commit adds kernel-doc style comments with complete parameter descriptions for the function smp_startup_cpu(). Signed-off-by:
Yang Li <yang.lee@linux.alibaba.com> Acked-by:
Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
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Yang Li authored
Fix some function names in kernel-doc comments. Signed-off-by:
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Yang Li authored
Fix the kernel-doc annotation for the 'skip' parameter in the partial_decompress() function by adding a missing underscore and colon. Signed-off-by:
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Masahiro Yamada authored
Commit ab1a517d ("powerpc/syscall: Rename syscall_64.c into interrupt.c") missed to update these three lines: GCOV_PROFILE_syscall_64.o := n KCOV_INSTRUMENT_syscall_64.o := n UBSAN_SANITIZE_syscall_64.o := n To restore the original behavior, we could replace them with: GCOV_PROFILE_interrupt.o := n KCOV_INSTRUMENT_interrupt.o := n UBSAN_SANITIZE_interrupt.o := n However, nobody has noticed the functional change in the past three years, so they were unneeded. Signed-off-by:
Masahiro Yamada <masahiroy@kernel.org> Signed-off-by:
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Christophe Leroy authored
Recent additions in BPF like cpu v4 instructions, test_bpf module exhibits the following failures: test_bpf: #82 ALU_MOVSX | BPF_B jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times) test_bpf: #83 ALU_MOVSX | BPF_H jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times) test_bpf: #84 ALU64_MOVSX | BPF_B jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times) test_bpf: #85 ALU64_MOVSX | BPF_H jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times) test_bpf: #86 ALU64_MOVSX | BPF_W jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times) test_bpf: #165 ALU_SDIV_X: -6 / 2 = -3 jited:1 ret 2147483645 != -3 (0x7ffffffd != 0xfffffffd)FAIL (1 times) test_bpf: #166 ALU_SDIV_K: -6 / 2 = -3 jited:1 ret 2147483645 != -3 (0x7ffffffd != 0xfffffffd)FAIL (1 times) test_bpf: #169 ALU_SMOD_X: -7 % 2 = -1 jited:1 ret 1 != -1 (0x1 != 0xffffffff)FAIL (1 times) test_bpf: #170 ALU_SMOD_K: -7 % 2 = -1 jited:1 ret 1 != -1 (0x1 != 0xffffffff)FAIL (1 times) test_bpf: #172 ALU64_SMOD_K: -7 % 2 = -1 jited:1 ret 1 != -1 (0x1 != 0xffffffff)FAIL (1 times) test_bpf: #313 BSWAP 16: 0x0123456789abcdef -> 0xefcd eBPF filter opcode 00d7 (@2) unsupported jited:0 301 PASS test_bpf: #314 BSWAP 32: 0x0123456789abcdef -> 0xefcdab89 eBPF filter opcode 00d7 (@2) unsupported jited:0 555 PASS test_bpf: #315 BSWAP 64: 0x0123456789abcdef -> 0x67452301 eBPF filter opcode 00d7 (@2) unsupported jited:0 268 PASS test_bpf: #316 BSWAP 64: 0x0123456789abcdef >> 32 -> 0xefcdab89 eBPF filter opcode 00d7 (@2) unsupported jited:0 269 PASS test_bpf: #317 BSWAP 16: 0xfedcba9876543210 -> 0x1032 eBPF filter opcode 00d7 (@2) unsupported jited:0 460 PASS test_bpf: #318 BSWAP 32: 0xfedcba9876543210 -> 0x10325476 eBPF filter opcode 00d7 (@2) unsupported jited:0 320 PASS test_bpf: #319 BSWAP 64: 0xfedcba9876543210 -> 0x98badcfe eBPF filter opcode 00d7 (@2) unsupported jited:0 222 PASS test_bpf: #320 BSWAP 64: 0xfedcba9876543210 >> 32 -> 0x10325476 eBPF filter opcode 00d7 (@2) unsupported jited:0 273 PASS test_bpf: #344 BPF_LDX_MEMSX | BPF_B eBPF filter opcode 0091 (@5) unsupported jited:0 432 PASS test_bpf: #345 BPF_LDX_MEMSX | BPF_H eBPF filter opcode 0089 (@5) unsupported jited:0 381 PASS test_bpf: #346 BPF_LDX_MEMSX | BPF_W eBPF filter opcode 0081 (@5) unsupported jited:0 505 PASS test_bpf: #490 JMP32_JA: Unconditional jump: if (true) return 1 eBPF filter opcode 0006 (@1) unsupported jited:0 261 PASS test_bpf: Summary: 1040 PASSED, 10 FAILED, [924/1038 JIT'ed] Fix them by adding missing processing. Fixes: daabb2b0 ("bpf/tests: add tests for cpuv4 instructions") Signed-off-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
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- 06 May, 2024 11 commits
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Michael Ellerman authored
There is code that builds with calls to IO accessors even when CONFIG_PCI=n, but the actual calls are guarded by runtime checks. If not those calls would be faulting, because the page at virtual address zero is (usually) not mapped into the kernel. As Arnd pointed out, it is possible a large port value could cause the address to be above mmap_min_addr which would then access userspace, which would be a bug. To avoid any such issues, set _IO_BASE to POISON_POINTER_DELTA. That is a value chosen to point into unmapped space between the kernel and userspace, so any access will always fault. Note that on 32-bit POISON_POINTER_DELTA is 0, so the patch only has an effect on 64-bit. Signed-off-by:
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Michael Ellerman authored
With -Wextra clang warns about pointer arithmetic using a null pointer. When building with CONFIG_PCI=n, that triggers a warning in the IO accessors, eg: In file included from linux/arch/powerpc/include/asm/io.h:672: linux/arch/powerpc/include/asm/io-defs.h:23:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 23 | DEF_PCI_AC_RET(inb, u8, (unsigned long port), (port), pio, port) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ... linux/arch/powerpc/include/asm/io.h:591:53: note: expanded from macro '__do_inb' 591 | #define __do_inb(port) readb((PCI_IO_ADDR)_IO_BASE + port); | ~~~~~~~~~~~~~~~~~~~~~ ^ That is because when CONFIG_PCI=n, _IO_BASE is defined as 0. Although _IO_BASE is defined as plain 0, the cast (PCI_IO_ADDR) converts it to void * before the addition with port happens. Instead the addition can be done first, and then the cast. The resulting value will be the same, but avoids the warning, and also avoids void pointer arithmetic which is apparently non-standard. Reported-by:Naresh Kamboju <naresh.kamboju@linaro.org> Closes: https://lore.kernel.org/all/CA+G9fYtEh8zmq8k8wE-8RZwW-Qr927RLTn+KqGnq1F=ptaaNsA@mail.gmail.comSigned-off-by:
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Hari Bathini authored
Currently, bpf jit code on powerpc assumes all the bpf functions and helpers to be part of core kernel text. This is false for kfunc case, as function addresses may not be part of core kernel text area. So, add support for addresses that are not within core kernel text area too, to enable kfunc support. Emit instructions based on whether the function address is within core kernel text address or not, to retain optimized instruction sequence where possible. In case of PCREL, as a bpf function that is not within core kernel text area is likely to go out of range with relative addressing on kernel base, use PC relative addressing. If that goes out of range, load the full address with PPC_LI64(). With addresses that are not within core kernel text area supported, override bpf_jit_supports_kfunc_call() to enable kfunc support. Also, override bpf_jit_supports_far_kfunc_call() to enable 64-bit pointers, as an address offset can be more than 32-bit long on PPC64. Signed-off-by:
Hari Bathini <hbathini@linux.ibm.com> Signed-off-by:
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Hari Bathini authored
With PCREL addressing, there is no kernel TOC. So, it is not setup in prologue when PCREL addressing is used. But the number of instructions to skip on a tail call was not adjusted accordingly. That resulted in not so obvious failures while using tailcalls. 'tailcalls' selftest crashed the system with the below call trace: bpf_test_run+0xe8/0x3cc (unreliable) bpf_prog_test_run_skb+0x348/0x778 __sys_bpf+0xb04/0x2b00 sys_bpf+0x28/0x38 system_call_exception+0x168/0x340 system_call_vectored_common+0x15c/0x2ec Also, as bpf programs are always module addresses and a bpf helper in general is a core kernel text address, using PC relative addressing often fails with "out of range of pcrel address" error. Switch to using kernel base for relative addressing to handle this better. Fixes: 7e3a68be ("powerpc/64: vmlinux support building with PCREL addresing") Cc: stable@vger.kernel.org # v6.4+ Signed-off-by:
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Stephen Rothwell authored
This list was moved many years ago. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Benjamin Gray authored
Documents how to use the PR_PPC_GET_DEXCR and PR_PPC_SET_DEXCR prctl()'s for changing a process's DEXCR or its process tree default value. Signed-off-by:
Benjamin Gray <bgray@linux.ibm.com> Signed-off-by:
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Benjamin Gray authored
Adds a utility to exercise the prctl DEXCR inheritance in the shell. Supports setting and clearing each aspect. Signed-off-by:
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Benjamin Gray authored
Now that the DEXCR can be configured with prctl, add a section in lsdexcr that explains why each aspect is set the way it is. Signed-off-by:
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Benjamin Gray authored
Now that a process can control its DEXCR to some extent, make the hashchk tests more reliable by explicitly setting the local and onexec NPHIE aspect. Signed-off-by:
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Benjamin Gray authored
Some basic tests of the prctl interface of the DEXCR. Signed-off-by:
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Benjamin Gray authored
Now that we track a DEXCR on a per-task basis, individual tasks are free to configure it as they like. The interface is a pair of getter/setter prctl's that work on a single aspect at a time (multiple aspects at once is more difficult if there are different rules applied for each aspect, now or in future). The getter shows the current state of the process config, and the setter allows setting/clearing the aspect. Signed-off-by:
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- 03 May, 2024 4 commits
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Benjamin Gray authored
Inheriting the DEXCR across exec can have security and usability concerns. If a program is compiled with hash instructions it generally expects to run with NPHIE enabled. But if the parent process disables NPHIE then if it's not careful it will be disabled for any children too and the protection offered by hash checks is basically worthless. This patch introduces a per-process reset value that new execs in a particular process tree are initialized with. This enables fine grained control over what DEXCR value child processes run with by default. For example, containers running legacy binaries that expect hash instructions to act as NOPs could configure the reset value of the container root to control the default reset value for all members of the container. Signed-off-by:
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Benjamin Gray authored
Add capability to make the DEXCR act as a per-process SPR. We do not yet have an interface for changing the values per task. We also expect the kernel to use a single DEXCR value across all tasks while in privileged state, so there is no need to synchronize after changing it (the userspace aspects will synchronize upon returning to userspace). Signed-off-by:
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Benjamin Gray authored
The hashchk tests want to verify that the hash key is changed over exec. It does so by calculating hashes at the same address across an exec. This is made simpler by disabling PIE functionality, so we can re-execute ourselves and be using the same addresses in the child. While -fno-pie is already added, -no-pie is also required. Fixes: bdb07f35 ("selftests/powerpc/dexcr: Add hashst/hashchk test") Signed-off-by:
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Dr. David Alan Gilbert authored
The last function to reference module_bug_list went in 2008's commit b9754568 ("powerpc: Remove dead module_find_bug code") but I don't think that was called since 2006's commit 73c9ceab ("[POWERPC] Generic BUG for powerpc") Now that the list has gone, I think we can also clean up the bug entries in mod_arch_specific. Lightly boot tested. Signed-off-by:
Dr. David Alan Gilbert <linux@treblig.org> Signed-off-by:
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- 01 May, 2024 2 commits
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Michael Ellerman authored
Aneesh's IBM address no longer works, switch to his preferred kernel.org address. Acked-by:
Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org> Signed-off-by:
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Michael Ellerman authored
Aneesh is stepping down from powerpc maintenance. Acked-by:
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- 30 Apr, 2024 2 commits
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Michael Ellerman authored
The `memory_limit` variable should only be used during boot, enforce that by marking it initdata. Signed-off-by:
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sundar authored
use the new cleanup magic to replace of_node_put() with __free(device_node) marking to auto release when they get out of scope. Suggested-by:
Julia Lawall <julia.lawall@inria.fr> Signed-off-by:
sundar <prosunofficial@gmail.com> Signed-off-by:
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- 29 Apr, 2024 10 commits
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Michael Ellerman authored
The sources for the powerpc selftests are arranged into sub-directories. However when the tests are built and installed, the sub-directories are squashed, losing the structure. For example, with the current code the result of installing the selftests is: $ tree tools/testing/selftests/kselftest_install tools/testing/selftests/kselftest_install ├── kselftest │ ├── ktap_helpers.sh │ ├── module.sh │ ├── prefix.pl │ └── runner.sh ├── kselftest-list.txt ├── powerpc │ ├── alignment_handler │ ├── attr_test │ ├── back_to_back_ebbs_test │ ├── bad_accesses │ ├── bhrb_filter_map_test │ ├── bhrb_no_crash_wo_pmu_test │ ├── blacklisted_events_test │ ├── cache_shape │ ├── close_clears_pmcc_test │ ├── context_switch │ ├── copy_first_unaligned ... │ ├── settings ... │ └── wild_bctr └── run_kselftest.sh All the powerpc tests are squashed into the single powerpc directory. In particular, note that there is a single `settings` file, even though there are multiple settings files in the powerpc selftest sources. One of the settings files ends up installed, depending on install order, even if they have different contents. Similarly if there were two tests with the same name in different sub-directories they would clobber each other. Fix it by replicating the directory structure of the source tree into the install directory. The result being for example: $ tree tools/testing/selftests/kselftest_install tools/testing/selftests/kselftest_install ├── kselftest │ ├── ktap_helpers.sh │ ├── module.sh │ ├── prefix.pl │ └── runner.sh ├── kselftest-list.txt ├── powerpc │ ├── alignment │ │ ├── alignment_handler │ │ └── copy_first_unaligned │ ├── benchmarks │ │ ├── context_switch │ │ ├── exec_target │ │ ├── fork │ │ ├── futex_bench │ │ ├── gettimeofday │ │ ├── mmap_bench │ │ ├── null_syscall │ │ └── settings ... │ ├── eeh │ │ ├── eeh-basic.sh │ │ ├── eeh-functions.sh │ │ └── settings ... │ └── vphn │ └── test-vphn └── run_kselftest.sh Note multiple settings files in different sub-directories. This change also has the effect of changing the names of the tests from the point of view of the kselftest runner. Before the tests are named eg: powerpc:copy_first_unaligned powerpc:cache_shape powerpc:reg_access_test After, the test collection names include the sub-directory: powerpc/alignment:copy_first_unaligned powerpc/cache_shape:cache_shape powerpc/pmu/ebb:reg_access_test That means whereas previously all powerpc tests could be run with: $ ./run_kselftest.sh -c powerpc After the change it's necessary to pass a regex that matches all powerpc entries, eg: $ ./run_kselftest.sh -c "powerpc.*" The latter form also works before and after the change. Signed-off-by:
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Michael Ellerman authored
The pmu Makefile has grown more sub directories over the years. Rather than open coding the rules for each subdir, use for loops. Signed-off-by:
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Madhavan Srinivasan authored
Build breaks when executing make with run_tests for sub-folders under powerpc. This is because, CFLAGS and GIT_VERSION macros are defined in Makefile of toplevel powerpc folder. make: Entering directory '/home/maddy/linux/tools/testing/selftests/powerpc/mm' gcc hugetlb_vs_thp_test.c ../harness.c ../utils.c -o /home/maddy/selftest_output//hugetlb_vs_thp_test hugetlb_vs_thp_test.c:6:10: fatal error: utils.h: No such file or directory 6 | #include "utils.h" | ^~~~~~~~~ compilation terminated. Fix this by adding the flags.mk in each sub-folder Makefile. Also remove the CFLAGS and GIT_VERSION macros from powerpc/ folder Makefile since the same is definied in flags.mk Signed-off-by:Madhavan Srinivasan <maddy@linux.ibm.com> Signed-off-by:
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Madhavan Srinivasan authored
When running `make -C powerpc/pmu run_tests` from top level selftests directory, currently this error is being reported: make: Entering directory '/home/maddy/linux/tools/testing/selftests/powerpc/pmu' Makefile:40: warning: overriding recipe for target 'emit_tests' ../../lib.mk:111: warning: ignoring old recipe for target 'emit_tests' gcc -m64 count_instructions.c ../harness.c event.c lib.c ../utils.c loop.S -o /home/maddy/selftest_output//count_instructions In file included from count_instructions.c:13: event.h:12:10: fatal error: utils.h: No such file or directory 12 | #include "utils.h" | ^~~~~~~~~ compilation terminated. This is due to missing of include path in CFLAGS. That is, CFLAGS and GIT_VERSION macros are defined in the powerpc/ folder Makefile which in this case is not involved. To address the failure in case of executing specific sub-folder test directly, a new rule file has been addded by the patch called "flags.mk" under selftest/powerpc/ folder and is linked to all the Makefile of powerpc/pmu sub-folders. Reported-by:Sachin Sant <sachinp@linux.ibm.com> Signed-off-by:
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Madhavan Srinivasan authored
In some powerpc/ sub-folder Makefiles, CFLAGS are defined before lib.mk include. Clean it up by re-ordering the flags to follow after the mk include. This is needed to support sub-folders in powerpc/ buildable on its own. Signed-off-by:
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Lidong Zhong authored
We noticed the following nuisance messages during boot process: vio vio: uevent: failed to send synthetic uevent vio 4000: uevent: failed to send synthetic uevent vio 4001: uevent: failed to send synthetic uevent vio 4002: uevent: failedto send synthetic uevent vio 4004: uevent: failed to send synthetic uevent It's caused by either vio_register_device_node() failing to set dev->of_node or the node is missing a "compatible" property. To match the definition of modalias in modalias_show(), remove the return of ENODEV in such cases. The failure messages is also suppressed with this change. Signed-off-by:
Lidong Zhong <lidong.zhong@suse.com> Signed-off-by:
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Nathan Lynch authored
plpar_hcall(), plpar_hcall9(), and related functions expect callers to provide valid result buffers of certain minimum size. Currently this is communicated only through comments in the code and the compiler has no idea. For example, if I write a bug like this: long retbuf[PLPAR_HCALL_BUFSIZE]; // should be PLPAR_HCALL9_BUFSIZE plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, ...); This compiles with no diagnostics emitted, but likely results in stack corruption at runtime when plpar_hcall9() stores results past the end of the array. (To be clear this is a contrived example and I have not found a real instance yet.) To make this class of error less likely, we can use explicitly-sized array parameters instead of pointers in the declarations for the hcall APIs. When compiled with -Warray-bounds[1], the code above now provokes a diagnostic like this: error: array argument is too small; is of size 32, callee requires at least 72 [-Werror,-Warray-bounds] 60 | plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, | ^ ~~~~~~ [1] Enabled for LLVM builds but not GCC for now. See commit 0da6e5fd ("gcc: disable '-Warray-bounds' for gcc-13 too") and related changes. Signed-off-by:Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by:
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Michael Ellerman authored
Erhard reported that kmemleak was showing a warning at boot: kmemleak: Not scanning unknown object at 0xc00000007f000000 CPU: 0 PID: 0 Comm: swapper Not tainted 5.19.0-rc3-PMacG5+ #2 Call Trace: .dump_stack_lvl+0x7c/0xc4 (unreliable) .kmemleak_no_scan+0xe0/0x100 .iommu_init_early_dart+0x2f0/0x924 .pmac_probe+0x1b0/0x20c .setup_arch+0x1b8/0x674 .start_kernel+0xdc/0xb74 start_here_common+0x1c/0x44 DART table allocated at: (____ptrval____) Which he bisected to a change in kmemleak, commit 23c2d497 ("mm: kmemleak: take a full lowmem check in kmemleak_*_phys()"). Because pmac_probe() is called before mem_topology_setup(), the min/ max PFN variables are still zero. That causes kmemleak_alloc_phys() to ignore the allocation, because the checks against the PFN fail. Then kmemleak_no_scan() can't find the allocation and prints warning. Given that kmemleak_alloc_phys() is ignoring the allocation to begin with, there's no need to call kmemleak_no_scan() at all, which avoids the warning. Reported-by:
Erhard Furtner <erhard_f@mailbox.org> Closes: https://lore.kernel.org/all/bug-216156-206035@https.bugzilla.kernel.org%2F/Signed-off-by:
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Ganesh Goudar authored
When a device is hot removed on powernv, the hotplug driver clears the device's state. However, on pseries, if a device is removed by phyp after reaching the error threshold, the kernel remains unaware, leading to the device not being torn down. This prevents necessary remediation actions like failover. Permanently disable the device if the presence check fails. Also, in eeh_dev_check_failure in we may consider the error as false positive if the device is hotpluged out as the get_state call returns EEH_STATE_NOT_SUPPORT and we may end up not clearing the device state, so log the event if the state is not moved to permanent failure state. Signed-off-by:
Ganesh Goudar <ganeshgr@linux.ibm.com> Signed-off-by:
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Sourabh Jain authored
The patch titled ("powerpc: make fadump resilient with memory add/remove events") has made significant changes to the implementation of fadump, particularly on elfcorehdr creation and fadump crash info header structure. Therefore, updating the fadump implementation documentation to reflect those changes. Following updates are done to firmware assisted dump documentation: 1. The elfcorehdr is no longer stored after fadump HDR in the reserved dump area. Instead, the second kernel dynamically allocates memory for the elfcorehdr within the address range from 0 to the boot memory size. Therefore, update figures 1 and 2 of Memory Reservation during the first and second kernels to reflect this change. 2. A version field has been added to the fadump header to manage the future changes to fadump crash info header structure without changing the fadump header magic number in the future. Therefore, remove the corresponding TODO from the document. Signed-off-by:Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by:
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